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DEPARTMENT OF AGRICULTURE AND RURAL DEVELOPMENT OF NGHE AN PROVINCE

MANAGEMENT UNIT OF DAM REHABILITATION AND SAFETY IMPROVEMENT (WB8)

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REPORT ON

ENVIRONMENTAL AND SOCIAL IMPACT ASSESSMENT

SUBPROJECT : REPAIRING AND UPGRADING RESERVOIRS: LA NGA, THANH THUY, RESERVOIR 271, DON HUNG, KHE DU, HOC

NGHET, KHE DUNG, KE SAT, RESERVOIR 3/9, HO TUAN, HON MAT, RAO BANG AND KHE DUA

PROJECT: DAM REHABILITATION AND SAFETY IMPROVEMENT (DRSIP/WB8) FUNDED BY THE WORLD

BANK

Nghe An, November 2019

Subproject

Report on Environemental and Social Impact Assessment (ESIA) 1

DEPARTMENT OF AGRICULTURE AND RURAL DEVELOPMENT OF NGHE AN PROVINCE

MANAGEMENT UNIT OF DAM REHABILITATION AND SAFETY IMPROVEMENT (WB8)

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REPORT

ENVIRONMENTAL AND SOCIAL IMPACT ASSESSMENT

SUBPROJECT: REPAIRING AND UPGRADING RESERVOIRS : LA NGA, THANH THUY, RESERVOIR 271, DON HUNG, KHE DU, HOC NGHET, KHE DUNG, KE

SAT, RESERVOIR 3/9, HO TUAN, HON MAT, RAO BANG AND KHE DUA IN NGHE AN PROVINCE

PROJECT: DAM REHABILITATION AND SAFETY IMPROVEMENT (DRSIP/WB8) FUNDED BY THE WORLD BANK

REPRESENTATIVE OF THE PROJECT OWNER

WB8 PPMU under DARD

REPRESENTATIVE OF THE CONSULTANCY UNIT

Thang Long infrastructure technology construction consultant joint stock

company

Nghe An, November 2019

Report on Environmental and Social Impact Assessment (ESIA) 2

LIST OF ABBREVIATIONS

AH Affected Household CPC Communal People’s Committee CPO Central Project OfficeDPC District People’s Committee DSR Dam Safety ReportDRSIP Dam Rehabilitation and Safety ImprovementDED Detailed Engineering DesignECOPs Environmental Code of PracticeSA Social AssessmentEIA Environment Impact AssessmentESMF Environment and Social Management FrameworkEMDF Ethnic Minority Development FrameworkEMDP Ethnic Minority Development Plan EM Ethnic minority EMP Environment Management FrameworkESIA Environment and Social Impact AssessmentESMP Environment and Social Management PlanFPIC Free, prior and informed consultationIPM Integrated Pest ManagementICM Integrated Crop ManagementMARD Ministry of Agriculture and Rural DevelopmentMCM Million Cubic MetersMoIT Ministry of Industry and TradeMoNRE Ministry of Natural Resources and EnvironmentWB World BankFFS Farm Field SchoolO&M Operation and MaintenanceOP/BP Policies of World BankGAP Gender Action Plan IDA International Development Agency RAP Resettlement Action Plan PPMU Provincial People’s CommitteePMU Project Management UnitPMB Project Management BoardPoE Project of ExpertisePPMU Provincial Project Management UnitPSC Project Steering CommitteeSRI System Rice IntensificationTOF Training of farmersVND Vietnamese dong TOR Terms of Reference


UNDP United Nations Development ProgramWHO World Health OrganizationWUA Water Users Association


TABLE OF CONTENT

LIST OF ABBREVIATIONS...................................................................................................................3TABLE OF CONTENT..........................................................................................................................5LIST OF TABLES..................................................................................................................................8LIST OF FIGURES..............................................................................................................................10SUMMARY...........................................................................................................................................11CHAPTER I: PROJECT INTRODUCTION....................................................................................16

1.1. Overview of the project..................................................................................................161.2. Approaches and methodology.......................................................................................17

1.2.1. Methodology for social impact assessment.............................................................171.2.2. Methodology for environmental impact assessment..............................................17

1.3. Implementation arrangement of ESIA report.............................................................19CHAPTER II: DESCRIPTION OF SUBPROJECT.........................................................................20

2.1. Overview of the subproject............................................................................................202.1.1. Name of the subproject............................................................................................202.1.2. Owner of the subproject..........................................................................................202.1.3. Objective of the project............................................................................................202.1.4. Location of subproject implementation..................................................................20

2.2. Status of works and construction solutions..................................................................232.3. Summary of excavation volumn, construction materials and machinery.................61

2.3.1. Summary of excavation volumn.............................................................................612.3.2. Summary of volume of materials............................................................................612.3.3. Mobilization of vehicles and machinery for construction.....................................622.3.4. Distance, transport route of materials:...................................................................64

2.4. Auxiliary items................................................................................................................652.4.1. Electricity, water for construction and living.........................................................652.4.2. Demand for workers’ houses and camps...............................................................652.4.3. Construction route...................................................................................................662.4.4. Landfill, soil pits......................................................................................................66

2.5. Material transportation plan.........................................................................................702.6. Pre-construction activities.............................................................................................702.7. Operational and maintenance activities.......................................................................702.8. Dam safety plan..............................................................................................................702.9. Subproject implementation schedule...........................................................................712.10. Cost of implementation..................................................................................................73

CHAPTER 3: LEGAL, ADMINISTRATIVE AND POLICY FRAMEWORK.............................743.1. Government Regulation.................................................................................................743.2. The World Bank’s safeguard policies...........................................................................77

3.2.1. Project level..............................................................................................................773.2.2. Subproject level........................................................................................................77

CHAPTER 4: NATURAL, SOCIO-ECONOMIC CONDITIONS AND ENVIRONMENTAL STATUS.................................................................................................................................................84

4.1. Natural conditions..........................................................................................................844.1.1. Geographical and geological conditions................................................................844.1.2. Meteorology, hydrology, rivers................................................................................95

4.2. Status of Natural environmental situation.................................................................1004.2.1. The quality situation of the physical environment components..........................1004.2.2. Status of biological resources...............................................................................101

4.3. General socio-economic characteristics of sub-project areas..................................1034.3.1. Socio-economic characteristics of subproject communes....................................1034.3.2. Social economic condition of subproject communes...........................................1074.3.3. Survey result of households benefited from subproject.......................................111

4.4. Sensitive works.............................................................................................................119


CHAPTER 5: ENVIRONMENTAL AND SOCIAL IMPACT ASSESSMENT..........................1275.1. Types and scale of impacts..........................................................................................1275.2. Positive environment and social impacts...................................................................128

5.2.1. Social impacts........................................................................................................1285.2.2. Environment impacts.............................................................................................128

5.3. Potential negative impacts from the subproject on the social environment...........1295.3.1. Assessment and forecasting of impacts during the process of preparing the subproject..............................................................................................................................1295.3.2. Impact evaluation and projection during subproject construction phase...........1355.3.3. Predictors of specific impacts................................................................................1645.3.4. Evaluating and forecasting of impacts during the operational phase of the subproject..............................................................................................................................175

5.4. Analysis of types of impact..........................................................................................1755.4.1. Cumulative impacts...............................................................................................1755.4.2. Direct Impact.........................................................................................................1765.4.3. Indirect impacts.....................................................................................................1765.4.4. Temporary impact..................................................................................................1765.4.5. Long term impact...................................................................................................176

CHAPTER VI: ALTERNATIVE ANALYSIS.................................................................................1776.1. Without subproject......................................................................................................1776.2. The option of implementing the sub-project..............................................................178

CHAPTER VII: ENVIRONMENTAL AND SOCIAL MANAGEMENT PLAN (ESMP).........1817.1. Objectives......................................................................................................................1817.2. Mitigation measures.....................................................................................................181

7.2.1. Impact mitigation measures in the subproject preparation measures.................1817.2.2. Mitigation measures during construction phase..................................................1857.2.3. Mitigation measures for specific impacts.............................................................2077.2.4. Mitigation measured in operation phase..............................................................218

7.3. Implementation arrangement.....................................................................................2197.3.1. Project management..............................................................................................2197.3.2. Roles and responsibilities for environmental and social safeguard management

2207.4. Environmental Compliance Framework...................................................................224

7.4.1. Environmental tasks of the Contractor:...............................................................2247.4.2. Contractor’s safety, social and environmental officer.........................................2257.4.3. Social and environmental monitoring during construction phase (Monitoring Consultant)...........................................................................................................................2257.4.4. Compliance with contract requirement and legal regulations............................2267.4.5. Report System........................................................................................................226

7.5. Grievance redressing mechanism...............................................................................2277.5.1. Complaints and complaint settlement procedures................................................2277.5.2. Contractor and construction supervision consultant...........................................2287.5.3. Grievance redressing mechanism of WB..............................................................229

7.6. ESMP Implementation plan........................................................................................2297.6.1. ESMP Implementation Plan of the Contractor....................................................2297.6.2. Subproject commencement and personnel...........................................................229

7.7. Capacity development and training plan...................................................................2297.7.1. Training on safety policies....................................................................................2307.7.2. Occupational health and safety training..............................................................2307.7.3. Orientation of visitors............................................................................................2307.7.4. Training for new contractors and workers...........................................................2307.7.5. Basic training on occupational health and safety................................................230

7.8. Environmental quality monitoring plan....................................................................2317.8.1. The compliance monitoring..................................................................................2317.8.2. Monitoring of environment quality.......................................................................2317.8.3. Monitoring frequency and parameters.................................................................232


7.8.4. Dam safety monitoring..........................................................................................2337.9. Estimated cost...............................................................................................................233

CHAPTER VIII: COMMUNITY CONSULTATION AND INFORMATION DISCLOSURE.2408.1. Community consultation..............................................................................................240

8.1.1. Contents and form of community consultation activities....................................2408.1.2. Consultation results...............................................................................................2408.1.3. Feedback and commitment of the investor...........................................................248

8.2. Information Disclosure................................................................................................248CONCLUSIONS AND RECOMMENDATIONS............................................................................249

Conclusion..................................................................................................................................249Recommendations......................................................................................................................249

REFERENCES.....................................................................................................................................250


LIST OF TABLES

Table 1: The list of reservoirs under the subproject of “Dam rehabilitation and Safety Improvement (WB8), Nghe An province”.....................................................................................................................11Table 2: Cost estimate for ESMP implementation.................................................................................15Table 3: List of persons participating in implementation......................................................................19Table 4: Geographic location of reservoir under the subproject...........................................................20Table 5: Summary of current information of reservoirs and construction works of the Subproject......23Table 6: volumn of excavation soil.........................................................................................................61Table 7: Volume of construction materials............................................................................................61Table 8: Forecast of oil dissipative in construction activities at construction sites..............................61Table 9: list of machines and equipment for construction of subproject works.....................................62Table 10: Distance, transport route of materials...................................................................................64Table 11: Expected number of workers in construction sites.................................................................65Table 12: Soil pits location.....................................................................................................................67Table 13: Landfill location.....................................................................................................................68Table 14: Progress of subproject implementation for Don Hung reservoirs and Ke Sat reservoir.......72Table 15: Progress of subproject implementation for reservoir: Hon Mat, Khe Dua, Khe Du, Rao Bang, Tuan, Hoc Nghet, Thanh Thuy, 271, 3/9, La Nga, Khe Dung......................................................72Table 16: Cost of implementation..........................................................................................................73Table 17: Summary of environmental assessment process of WB & Government.................................79Table 18: The average monthly meteorological characteristics Tay Hieu meteorological station.......95Table 19: The average monthly meteorological characteristics Quynh Luu meteorological station....95Table 20: Evaporation amount by month...............................................................................................96Table 21: Main flood flow......................................................................................................................96Table 22: Five-frequency flow P = 85%................................................................................................98Table 23: Plan for planting agricultural crops in the summer-autumn crop of 2018 in the subproject area.......................................................................................................................................................103Table 24: Details on socio-economic conditions of subproject communes..........................................108Table 25: Demographic characteristics of households surveyed.........................................................112Table 26: The average household structure is surveyed by commune level under the subproject.....112Table 27: Occupation of the household head.......................................................................................112Table 28: Main occupation of household head by subproject area (%)..............................................113Table 29: Education level of the head of household............................................................................113Table 30: Education level of household head by commune (%)..........................................................114Table 31: Income and living standards of surveyed households..........................................................114Table 32: Distance from home to service points in the subproject area..............................................115Table 33: Housing and living conditions of surveyed households (%)................................................115Table 34: Type of household toilet (%)................................................................................................116Table 35: Characteristics of the family's drinking water source (%)..................................................116Table 36: Characteristics of the family's bathing water source (%)....................................................116Table 37: Ownership of productive land by commune in the subproject.............................................116Table 38: Awareness of HIV / AIDS prevention measures (%)............................................................117Table 39: Gender in family decision making (%).................................................................................118Table 40: Division of labor by gender in production and daily life (%)..............................................118Table 41: Gender in local community participation (%).....................................................................119


Table 42: Number of women participating in leadership and management work in the subproject communes.............................................................................................................................................119Table 43: Summary of the status of sensitive works.............................................................................120Table 44: The criteria for classification of negative impacts...............................................................127Table 45: Sources of impact during construction preparation phase..................................................129Table 46: Total areas of land acquired permanently for the subproject..............................................130Table 47: AHs and land acquired temporarily by the subproject........................................................131Table 48: Summary of timber trees affected permanently....................................................................132Table 49: The volume of biomass generated during the preparation phase........................................134Table 50: A summary of source of impact during construction phase.................................................135Table 51: Summary of material volume for project and volume excavation of soil and embankment137Table 52: Concentration pollutants in the air from the process of transporting construction materials are swept with the wind........................................................................................................................139Table 53: Pollutant load coefficient for trucks running on roads (for 1000 km).................................140Table 54: Number of turns transport vehicles......................................................................................140Table 55: Concentration of pollutants through transport of materials................................................141Table 56: Pollution emission coefficient due to construction activities...............................................142Table 57: Concentration of pollutants through earthworks..............................................................143Table 58: Concentration of pollutants through transport of rock and soil from land mines and landfills..............................................................................................................................................................144Table 59: Concentration of pollutants from the operation of construction machinery........................145Table 60: Estimates of sources of substances causing water contaminants........................................147Table 61: Concentration of pollutants of domestic wastewater during construction phase................147Table 62: Concentration of pollutants in construction waste water....................................................147Table 63: Predict potential soil erosion due to rain from construction items of the subproject..........149Table 64: Flow and load of pollutants in wastewater from construction equipment...........................149Table 65: Estimated volume of excavation, embankment and domestic waste generated from subproject construction activities.........................................................................................................150Table 66: Calculation results of noise level at source during construction phase..............................152Table 67: Forecast of noise reduction according to distance from source..........................................153Table 68: Vibration level decreases with the distance in construction................................................155Table 69: Benefit area and the number of households can be affected due to interruption of irrigation water supply during subproject construction.......................................................................................158Table 70: Potential impacts during construction implementation to sensitive works..........................165Table 71: Cost estimate for compensation and resettlement of the Subproject...................................183Table 72: Environmental code of practices (ECOP) to mitigate general impacts during the construction process.............................................................................................................................187Table 73: Mitigation measures for sensitive works.............................................................................208Table 74: General mitigation measures for impacts during operation phase.....................................218Table 75: Roles and responsibilities of stakeholders...........................................................................221Table 76: Requirements on report system............................................................................................226Table 77: Summary of the contents of quality monitoring of environmental components in the construction phase and operation and maintenance............................................................................232Table 78: Estimated costs for CESMP implementation monitoring and training................................233Table 79: Budget source for ESMP monitoring...................................................................................234Table 80: summary of mitigation measures.........................................................................................235Table 81: Summary of participants in the consultation meetings........................................................240Table 82: Concerns of affected communities........................................................................................241


Table 83: Summary of consultation result and feedback of the project’s owner.................................242

LIST OF FIGURES

Figure 1: Locations of subproject reservoirs.........................................................................................21Figure 2: Geographical location of Nghe An province..........................................................................84Figure 3: Structure of environmental management and supervision organization..............................219Figure 4: Organizational chart of subproject safeguard performance..................................................220


Subproject

SUMMARY

1. Introduction: The project of: “Dam Rehabilitation and Safety Improvement (DRSIP/WB8) funded by the World Bank is approved by Prime Minister in accordance with the Decision No. 1858/QĐ-TTg dated 02/11/2015 and the Feasibility Study Report of the project is approved by Minister of Ministry of Agriculture and Rural Development through Decision No. 4638/QĐ-NN-HĐQT dated 09/11/2015.

2. Subproject: Repairing and upgrading are to ensure the safety for reservoirs of La Nga, Thanh Thuy, reservoir 271, Don Hung, Khe Du, Hoc Nghet, Khe Dung, Ke Sat, reservoir 3/9, Ho Tuan, Hon Mat, Rao Bang and Khe Dua in Nghe An province under the project of dam rehabilitation and safety improvement, WB8. Based on Decision No. 2593 / QD-UBND of the Chairman of Nghe An Provincial People's Committee dated June 16, 2017 on assigning the task of the project owner and establishing the PMU for Dam Rehabilitation and Safety Improvement Subproject (WB8) Nghe An province; Based on Document No. 6025 / UBND-NN dated 13/12/2017 of the Chairman of Nghe An Provincial People's Committee on the implementation of Subproject, Nghe An province under the project of Dam Rehabilitation and Safety Improvement (WB8) and Based on Document No. 1827 / UBND-NN dated March 27, 2018 of Nghe An Provincial People's Committee on the implementation of the package of consultancy packages for elaboration of the subproject feasibility study report (subproject), under the project Dam Rehabilitation and Safety Improvement (WB8). Subproject consists of 13 works as presented in Table below:

Table 1: The list of reservoirs under the subproject of “Dam rehabilitation and Safety Improvement (WB8), Nghe An province”

No. Name of reservoirsThe implementation location of the subproject

Communes/wards District1 Don Hung reservoir Hung Thanh Yen Thanh2 Ke Sat reservoir Tien Thanh Yen Thanh3 Hon Mat reservoir Nghia Loc Nghia Dan4 Khe Dua reservoir Nghia Thuan Thai Hoa5 Khe Du reservoir Hoa Son Do Luong6 Rao Bang reservoir Nam Thanh Nam Dan7 Ho Tuan reservoir My Thanh Yen Thanh8 Hoc Nghet reservoir Ngoc Son Quynh Luu9 Thanh Thuy reservoir Van Dien Nam Dan

10 271 reservoir Ky Tan Tan Ky11 3/9 reservoir Ky Tan Tan Ky12 La Nga reservoir Ngoc Son Thanh Chuong13 Khe Dung reservoir Quynh Thang Quynh Luu

3. The status of reservoirs under the subproject: The reservoirs of WB8 project were built and exploiting for a long time. Currently the earth dam has been seriously degraded, small dam face, low, high, rugged and the dam surface has not been reinforced. Embankment earth of dams previously low quality, use manual methods, therefore there are some seepage positions on the body of the dams and the adjoining contiguous between the dam and the foundation. The upstream roof protection with freestone has been eroded and damaged many places; some reservoirs have not been reinforced and protected. The grass in the downstream slope is heavily eroded, most of reservoirs do not have downstream drainage equipment. On the other hand, flood spillways of reservoirs are mainly constructed by earth, that has been erosion and damaged, there is no bridge over flood spillways position to serve people traveling (Only some reservoirs have been repaired). According to the old design dossier, the flood protection design level P = 1.5%, 2%, due to climate change, flooding is getting bigger, flooding is faster due to deforestation, according to the new regulation (National technical regulation QCVN04/05/2012/BNNPTNT) design guarantee level is increased. Therefore, the risk of breaking earth dams is huge when there is a big flood. On the downstream of the dams, residents are living and producing stably (including 978 households and 5250 ha of land). In particular, downstream of the dam, there are Ho Chi Minh roads, Highway 7 and inter-commune roads running through, these are arterial roads. If the dam is broken, the loss of life and property of the


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people downstream is being huge. Status of reservoirs is presented in detail in Annex 2.2.1 of this report.

4. Results of environmental and social screening: The subproject is not located in or near natural habitats and there is no rare or endangered animal found in the subproject area. There is also no sensitive works and historical, cultural and religious site in or near subproject area. Regarding ethnic minorities, 100% of the surveyed household heads are Kinh, there are no ethnic minority people participating in the socio-economic survey. Results of screening and consultation with local authorities indicate, although there are 5 communes have ethnic minority people, they do not live in the affected area nor benefit from the subproject, therefore will not trigger OP/BP 4.10 Indigenous peoples. The subproject is only implemented upgrading of dams on the existing reservoirs, which have been carried out social and environmental screening and determined that the subproject does not cause much negative effect on environment and society in the project area. The subproject is classified as Category B on environmental and social impact. Related policies triggered for the subproject include OP/BP 4.01 on environmental assessment, OP 4.09 on pest management, OP/BP 4.37 on dam safety, OP/BP 4.12 on involuntary resettlement.

5. The social and environmental impact assessment aims to identify both positive and negative impacts of the subproject, thereby proposing appropriate mitigation measures to control and manage those impacts, in order to optimize the benefits of the subproject.

6. Social and environmental impacts of the subproject: The subproject brings both positive and negative impacts.

(a) Positive impacts: (i) The subproject will repair and upgrade safety of head works of reservoirs to ensure safety for people living in the downstream area and their assets , and communes in subproject and residents of neighbouring affected areas; (ii) After being implemented, the subproject will improve the storing capacity of reservoirs, improve capacity of storing groundwater in the nearby area; (iii) Regularly and sustainably provide irrigation water for agriculture cultivation area in the downstream area; (iv) Improve landscape in the reservoir area and provide habitat aquatic life.

(b) Negative impacts during the process of preparing and constructing the subproject: Potential negative impacts include: (i) 4.672,26 m2 of permanently acquired land (Of which, 4,672.26 m2 of agricultural land was acquired of the 4 households and 1 organization was Van Dien Commune People's Committee) and 75,000 m2 of temporary acquired land (including 16,200 m2 of unused flat land, 1,000 m2 of productive forestry land, 6,000 m2 of unused hilly land, 9,800 m2 of other perennial land, 42,000 m2 of land has specialized water surface) Under the management of 12 CPCs, under Sub-project; (ii) According to the results of consultations and interviews in the subproject localities, explosive objects have not been observed in the subproject communes. However, Nghe An province has repeatedly discovered explosive objects and has been handled by the authorities, but there are still casualties due to accidents related to the existence of explosive objects. Therefore, explosive objects may be found in the construction area or the land mine, stone. In order to minimize risks, the subproject owner should contact the competent authorities to conduct mine clearance to assess the risk and provide confirmation of the safety of explosive objects before construction. (iii) Site clearance activities, create construction ground, transporting waste due to clearance of vegetation cover, soil rock will create impacts: Dust, exhaust gas, noise, vibration affect construction workers, people in the subproject area; Wastewater from worker activities and Storm water runoff with high suspended solids content due to loss of vegetation cover will affect the quality of receiving water and soil quality in the subproject area; Solid waste being generated by workers and clearance of vegetation cover if not managed well will affect the surrounding environment and landscape of the subproject area. (iv) Another activity in the project preparation phase is geological exploration drilling of a 110 mm diameter drill hole drilled to 100 m deep to examine the geological conditions and aquifer characteristics, and at the same time, conducting geophysical karota in the boreholes, if the drilling process is not strictly handled, it will affect the quality of groundwater aquifer due to the infiltration of pollutants through boreholes. (v) The impacts to fauna and flora related to construction activities such as noise, vibration, air pollution due to dust and emissions, water pollution, waste, as well as social risks due to site clearance and construction affecting traffic safety, community infrastructure, risk of accidents, community conflict and infectious disease and disruption of business activities have been also identified and assessed in the report. Moreover, during the construction process, it may be blocked water source to construct the works of the subproject which may affect water supply for


agriculture of 12 communes in the subproject area. The works of the subproject are scattered in the 13 village/12 communes of 8 districts and the implementation location is mainly on agriculture land, and located far from residential and important areas and does not affect forestry land; therefore, the negative impacts of the subproject are assessed at low to average level and can be controlled by a suitable management plan. However, there are still long term impacts on the subproject area such as land mine and dumping sites which can cause degradation of agricultural land, unused hill land, and vacant land within the temporarily borrowed land of localities in the subproject area during the process of using.

(c) Potential negative impacts during the operational stage: (i) Dam safety risks can occur in the event of an broken dam or flood discharge causing flooding downstream; Accident related to drowning (ii) Domestic waste from eco-tourism activities in some reservoirs has developed this type of service; (iii) The implementation of the subproject does not increase the capacity of the reservoir, does not increase the irrigated area in the downstream area and does not affect the crop structure in the subproject area. However, the repair of the culverts has been damaged and the leakage of water will be overcome to ensure more stable irrigation water regulation and will provide adequate irrigation water for the subproject area in the drought season, restore the volume and initial irrigated area of the reservoir, At that time, the cultivation of agricultural crops for areas that lack water in the drought season will be restored. On the other hand, repair activities can lead to interrupt water supply for a short time. This will have a direct impact on the agricultural production activities of the downstream people. And will indirectly cause impacts such as reducing income due to the reduced time of agricultural cultivation, environmental pollution and disease due to lack of water. However, this impact is assessed as low because the repair and maintenance time does not last long (about a few weeks). Therefore, it will increase the amount of pesticides and fertilizers in the area of water shortage and increase the pest in the subproject area. On the other hand, the use of chemicals to kill termites in the dam body if not well managed also affects the surrounding environment if due to residue and disposal is not in the right place or termite-killing chemicals are swept away by rainwater. Therefore, an integrated pest management (IPM) plan for this subproject is required.

7. Mitigation measures for impacts: To handle these impacts, an Environmental and Social Management Plan (ESMP) has been prepared as a part of this document with proposed institutional arrangements for impact management, environmental management and monitoring, reporting requirements, capacity building, budgeting for implementation. A separate Resettlement Action Plan/Compensation and Resettlement plan has been prepared to deal with the impacts of land acquisition. The following are the measures which need to be taken.

Preparation phase:

- Implement RAP.

- Integrate environmental impact mitigation measures in technical design if any.

- Consult people about the actual time of repairing dam with purpose of mitigating impacts of three phases: preparation, construction of subproject and operation of subproject.

- Integrate requirements on implementation of mitigation measures in bidding documents and contracts as well.

Construction phase:

- Require the contractor to strictly and fully implement impact mitigation measures defined in Environmental and Social Impact Assessment Report, Social Impact Assessment Report of the subproject and measures included in this report.

- Require the contractor to implement routine maintenance for existing construction roads.

Operation phase:

- During the operational process, the upgraded and repaired items of the subproject such as: anti- seepage on dam body, treatment of loss of water due to damaged items will improve the capacity of storing of water and ensure the capacity of regulating water through repairing of intake. Thus, it will increase irrigation area that has been not provided enough for designed


irrigation area because of losing water of reservoirs. Therefore, introduction and promotion of the method of integrated pest management in the areas of irrigation services is necessary.

- PPMU frequently monitor to ensure that the damaged structures will be repaired and restored in accordance with approved dossier. Reservoir management units regularly check dam safety, patrol the Reservoir area to avoid drowning accidents; forecast and warning to authorities and people when there are extreme weather phenomena; Regularly collect garbage at the reservoir area, for reservoirs operating in tourism business, there must be garbage bins and coordinate with garbage collection units in localities to collect daily.

- For the impact of increased use of pesticides, agencies: Plant Protection Department of Nghe An province; Plant Protection Station of districts under the subproject; and the People's Committee of 12 communes under the subproject must comply with the contents of the Pest Management Plan (IPM) of this subproject. In addition, farmers in the process of cultivation need to select good varieties, regularly check pests and diseases, use pest control measures recommended in the pest management plan (IPM) such as: (i) Cultivation measures: Soil preparation, field cleaning; rotation, intercropping; proper time; sowing and planting reasonable density; use fertilizer properly; Appropriate care measures (ii) Use of breeds: Traditional varieties and proposed varieties suitable for local conditions (iii) Biological measures: taking advantage of using natural enemies available in the field, using bioproducts …(iv) Chemical measures: use safe pesticides with natural enemies; follow economic threshold ... Follow safety guidelines on pesticide storage, transportation and use to minimize negative environmental and health impacts.

8. Implementation arrangement: The Ministry of Agriculture and Rural Development (MARD) is responsible for implementing and managing the entire project. Provinces that perform repairs to dams in Component 1 and MARD will coordinate activities with the Ministry of Industry and Trade and the Ministry of Natural Resources and Environment in Component 2. Central Management Board (CPMU) under MARD is responsible for coordination and overall monitoring of the project. The implementation of repairs and preparations for the dam safety plan, including protection and entrustment, is focused on provincial authorities. Provincial People's Committee is the chair of the provincial level. The Provincial Project Management Unit (PPMU) is responsible for managing and monitoring the works with support from CPMU. Management Unit of Dam rehabilitation and Safety Improvement (WB8), Nghe An province (hereinafter referred to as PMU) responsible for implementing and monitoring implementation ESIA. The PMU ensures that documents and contracts for valid bidding include environmental provisions for contractors to comply with. The contractor will carry out construction activities and comply with the environmental agreements agreed in the contract. In particular, the contractor will prepare an Environmental and Social Management Plan for the PMU to review and approve before starting construction. PMU and consultants will closely monitor compliance with contractor's agreed mitigation measures. In addition, the contractor's compliance will be closely monitored by Department of Natural Resources and Environment of Nghe An province, local authorities and people.

9. Capacity building: During the implementation process, PPMU receives support from CPMU on the World Bank's environmental safety policy. The PPMU's safety policy staff has been trained by CPMU in coordination with the World Bank experts to guide the project's environmental safety issues and World Bank's safety policies. related to the project implementation included: OP4.1 (Environmental Assessment), IFC's General Guide to Environment, Health and Safety (EHS), OP4.04 (Natural Habitats), OP 4.10 (ethnic minority people) và OP4.12 (involuntary resettlement) …

10. During the implementation of the subproject, training and training on environmental safety policies for Construction Supervision Consultant (CSC) and EHS staff of the contractor are carried out regularly to update the relevant information. For PPMU, during the implementation of the subproject, the subproject will receive regular support from CPMU's independent consultancy and technical assistance on the management of dam safety risk issues, monitoring the implementation of the ESMP.

11. Community consultation: During the period of October 2018, Preparation consultant ESIA conducted 01time consultation at provincial, district level and 01time consultation in 12 subproject communes (With a total of 352 participants, of which 243 are male and 109 are female). The main contents are a general introduction of the subproject's capital source, program of the subproject ., a


brief description of the proposed technical options and environmental, social impacts and measures to minimize negative impacts during construction and operation, consult the representatives of local authorities and the people 's community on impacts and mitigation measures during the preparation and construction process. After the consultation process, local opinions are directly listened and recorded by the Project Management Board and consulted. Agencies, local authorities and communities all agree to invest in the Sub-project; Proposing the Subproject Owner and the unit involved in the construction of the subproject fully implement the commitments to protect the living environment and social security order of the locality. Consultations will be conducted regularly during the construction process to promptly address issues related to social environmental impact assessment.

12. Cost estimation for ESMP implementation: ESMP implementation cost estimate includes costs for ESMP monitoring, mitigation measure implementation and capacity building. Mitigation measure implementation cost shall be included in the construction cost. Cost estimates for ESMP implementation are: 532,067,580 VND. Details are as follows:

Table 2: Cost estimate for ESMP implementation

No. Cost item Amount (VND)1 Cost estimated for Contractor’s specific mitigation

measures 391,597,800

2 Cost for environmental monitoring during construction phase 89,700,000

3 Cost for IPM program 2,400,0004 Contingency (10% of 1+2+3+4) 48,369,780 5 Total 532,067,580

13. Grievance Redress Mechanism (GRM): Complaints related to the subproject will be resolved by negotiating to get agreement with the people. Complaints will be negotiated by the parties at all three stages (People's Committee at commune, district and provincial levels) before submitting to the court in accordance with the 2011 Complaint Law. PPMU will pay all administrative and legal costs related to the receipt of the complaint because this payment cost is included in the subproject budget.

14. Information dissemination: The compliance with policy of OP 4.01 and policies of World Bank on accessing to information: from the stage of preparing the subproject, relevant information has been disseminated to community through mass media. PPMU disseminated information and directly consulted community in 10/2018 and sent consultation information to local organizations. The draft of ESIA in Vietnamese was sent to CPCs to disseminate information and consult in 10/2018. The final version is expected to be disclosure in 04/2019 through the website of CPO and website of the Bank in English before appraisal of the subproject

15. Conclusion: The implementation of subproject in Nghe An may have negative impacts in the subproject phases, but due to the small scale of construction items, impacts will occur in a short time, The scope in the area is small and insignificant, so the sub-project has proposed feasible mitigation measures, suitable to the natural, socio-economic conditions and the conditions of subproject management and construction at localities.

16. The Environmental and Social Monitoring and Management Plan is set up to monitor impacts, to help stakeholders and local authorities to regularly update the implementation process of subproject items. The monitoring system is prepared and approved by the WB will apply in the implementation of subproject, construction supervision consultants regularly check and prepare monthly reports to submit PPMU.


Subproject

CHAPTER I: PROJECT INTRODUCTION

1.1. Overview of the project

17. Vietnam is one of the nations that own largest networks of dams and hydraulic infrastructure in the world, including 7,000 dams of different types and sizes. More than 750 dams are able to be classified as large dams (height over 15m or between 5 and 15m with the water reservoir storage in excess of 3,000,000 m3). The number of small dams (height less than 15m with the water reservoir storage lower than 3,000,000 m3) is estimated to be over 6,000, which are mainly earth dams. Of the total 4,000,000 ha of agricultural land, more than 3,000,000 ha are irrigated by 6,648 dams.

18. Many small-medium reservoirs were built in 1960s with limited technical surveys, designs and construction in addition to limited and slow operation and maintenance. As a consequence, many have been degraded, unsafe and failed to meet the international safety standards. In addition, increasing risks of unstable hydrology due to climate change and massive upstream development make reservoirs at risks of subsidence of major structures, permeability to main dams and/or subsidiary dams/surrounding water-intake works, deformation of upstream/downstream slopes, spillway incidents etc, …

19. Awareness of the importance of infrastructure for the country’s sustainable economic growth, the Government launched a multi-sector program in 2003, including the “Dam Rehabilitation and Safety Improvement Project”(DRSIP) financed by the World Bank, which supports dam safety and reservoirs and operational safety to downstream populations and socio-economic infrastructure that are at risk, ensures the downstream integrated development planning and strengthens institutional coordination and future development and safe operation of reservoirs.

20. The Ministry of Agriculture and Rural Development (MARD) is responsible for the implementation and management of the entire project. The Provinces repair and upgrade dams under Component 1 and MARD will coordinate activities with the Ministry of Industry and Trade (MOIT) and MONRE under Component 2. The CPMU (under MARD) is responsible for coordinating and monitoring the entire project. The repair and preparation of dam safety plans, including protection and commissioning, are centered on provincial government. The Provincial People's Committee (PPC), the Department of Agriculture and Rural Development (DARD) are the managers at the provincial level. The PPMU is responsible for managing and supervising the works with the support from the CPMU.

21. The selection of rehabilitation dams by the Project was based on unified criteria, probability and severity of incidents and risks to human and socio-economic infrastructure, paying importance of economic benefits in the poverty and inequality framework. The assessment criteria for dam safety include: (i) dam incident probability (structural risk that is based on height and capacity); (ii) impact of dam incident on downstream people; (iii) impact of dam incident on downstream infrastructure, (iv) context of poverty and impact, (v) areas of ethnic minorities; and (vi) the readiness.

22. The Project is implemented in 34 provinces in the North, Central and Highlands. There are about 450 selected dams. The project components include:

- Component 1: Dam Safety Rehabilitation (US$ 412 million, of which IDA’s funding is US$ 388.5 million);

- Component 2: Dam Safety Management and Planning (US$ 20 million, of which IDA’s funding is US$ 17 million);

- Component 3: Project Management Support (US$ 11 million, of which IDA’s funding is US$ 9.5 million);

23. In the second year, the Project will support the repair and solidification of related infrastructure and dams. About 90% of the proposed dams are earth dams which are less than 15m high and their design capacity are less than 3 million m3. The Project does not invest in completely changing existing structure or new construction or expansion of main structure but focuses on repairing and re-shaping structure of main dams, secondary dams, strengthening upstream slope by concrete and stones, reinforcing or expanding spillways to increase drainage capacity, repair or rehabilitation of existing intake culverts, replacement of hydraulic system at sluice gates (intake culverts) and spillway gate,


drilling for waterproofing of the main dam bodies, upgrading service roads.

24. The Project is expected for 6 years, 08/7/2016 - 30/6/2022. With regard to the environmental protection, the ESMF of the first year of the Project was approved in 2015. The Environmental and Social Impact Assessment (ESIA) for the next years of the subprojects will follow the project progress the CPMU, the PPMU and the World Bank agreed.

25. In Nghe An province, the Dam Rehabilitation and Safety Improvement Subproject is to ensure the safety of the reservoirs through the repair and rehabilitation of 13 dams and strengthening management capacity and safe operation of dams to protect inhabitants and socio-economic infrastructure in 12 communes in 8 districts: Yen Thanh, Nghia Dan, Thai Hoa, Do Luong, Nam Dan, Quynh Luu, Tan Ky and Thanh Chuong.

1.2. Approaches and methodology

26. The Environmental and Social Impact Assessment (ESIA) is implemented in accordance with the World Bank’s regulations and the Law on Environmental Protection and other laws and regulations of the Government of Vietnam. The purpose of the ESIA is to identify the importance of environmental and social issues in the decision-making process by assessing environmental and social consequences of the proposed research before undertaking the project activities. Early identification and characterization of important environmental and social impacts will help communities and governments assess potential environmental and social impacts of the proposed subproject and apply mitigation measures to minimize the risk of such effects.

1.2.1. Methodology for social impact assessment

27. The objectives of the social assessment (SA), in parallel with the environmental assessment of the Subproject, include: First, it examines potential impacts of the subproject–positive and negative–on the basis of planned subproject activities. Second, it finds from the design of measures addressing potential adverse impact and proposing community development activities that are relevant to the project development objectives. For identified adverse impacts, consultation with local people, governmental agencies, project stakeholders, etc., were carried out to ensure that affected people will be appropriately compensated and supported in a manner that their socioeconomic activities will be promptly and fully restored to the pre-project level, at least, and that their livelihoods will not be worse off, in the long run, as a result of the 8 subprojects.

28. A part of the social assessment is ethnic minority (EM) peoples who are living in the subproject area and are confirmed by the EM screening (WB’s OP 4.10). The consultations with them were carried out in a free, prior, and informed manner to confirm supports for affected EM peoples when there is the subproject implementation. The EM screening was conducted based on WB’s OP 4.10 and implemented within the social assessment scope and area corresponding to the scope of the environmental assessment (according to OP 4.01).

29. A gender analysis in the subproject area was also done as part of the SA to understand gender features in the subproject area to enable gender mainstreaming to gender equality improvement and to enhance further development effectiveness of the subprojects and the Project as a whole. Depending on the magnitude of the identified potential project impacts and the project development objectives, a gender action plan and a gender monitoring plan were prepared.

30. To ensure that any potential impacts can be identified during the project preparation, the SA was conducted through series of consultations with the stakeholders. A particular focus was the households which are potentially affected (both positively and adversely) by the Subproject. The assessment techniques for this SA include 1) review of secondary data, 2) field observations; 3) focus groups discussions/community meetings, 4) key informant interview, and 5) households survey

1.2.2. Methodology for environmental impact assessment

31. During the ESIA survey and reporting, the Consultant Agency used a combination of the following methods.

(1) Rapid assessment method

32. The Rapid Assessment Method was issued by the World Health Organization in 1993. The basis of this method is based on the nature of material, technology, rules of processes in nature and


experience to quantify pollutant discharge load.

33. In Vietnam, it has been introduced and applied in many CESMP studies, which performs relatively accurate the calculation of pollutant discharge under limited conditions of instrumentation and analysis. In this report, the pollutant discharge coefficients are taken from the World Bank’s Environmental Assessment Sourcebook (Environmental Assessment Sourcebook, World Bank, Washington D.C 8/1991).

(2) The method of building impact matrix

34. Establishing correlation between impact of each project activity on each issue and environmental component as shown on the impact matrix, which is basic for the focus on detailed contents of impact study.

(3) Comparative method

35. The comparison method is to evaluate the environmental quality, effluent discharge quality, pollutant discharge load... on the basis of comparison with the relevant environmental standards and regulations of MONRE and MOH as well as related research and experiment topics.

(4) Description of environmental system

36. Identifying subproject components that affect the environment and identifying in full effluents, related environmental issues for detailed assessment.

(5) Enumerating method

37. It is used extensively (since the National Environmental Protection Agency (NEPA) has been established in some countries) and yields positive results thank to its advantages as mentioned above such as clear approach and systematic supply during system analysis and evaluation. There are two main construction items: A descriptive list of the environmental components to be studied along with measurement, forecasting and evaluation, a simple list of environmental components which are likely affected to be studied.

(6) System analysis method

38. This method is quite popular in the environment assessment. The advantage of this approach is the comprehensive assessment of impacts, which is very useful in identifying impacts and sources of waste. It is based on the assessment of waste sources, impacted objects, environmental components, etc., as the elements in a system have close relationship with each other, thereby, we can identify, analyze, and evaluate impacts.

(7) Community consultation method

39. This method is used during interviews with local leaders and local people to gather necessary information for the Subproject's ESIA preparation, introduction of benefits and possible negative impacts of the Subproject on the environment and the life. Based on that, we can aggregate feedback and aspirations of local people.

40. On the other hand, we can directly interview local officials and local people on socio-economic development, farming practices and environmental sanitation.

(8) Method of collecting and analysis of information and data

41. This method aims at identifying and evaluating natural and socio-economic conditions in the subproject area through data and information collected from different sources like statistical yearbook, socio-economic report, current status of environment and related research works.

(9) Field survey method

42. Field survey is required when carrying out the assessment of social and environmental impacts to determine the current status of the subproject area, related objects and to select sampling locations, survey of status of water supply, drainage, electricity supply etc.

43. The consulting agency carried out topographical and geological surveys and collected hydrometeorological data for design in accordance with the current standards of Vietnam. These survey results are used to assess the natural conditions in the subproject area.


(10) Expert panel method

44. Based on the knowledge and experience of environmental science of environmental impact assessment experts of the Consultancy Agency and other scientific research agencies.

(11) Method of sampling and analysis in laboratory

45. Sampling and analysis of environmental components (soil, water, air) is indispensable in identifying and assessing the status of baseline environment quality in the subproject area.

46. After field survey, the sampling and analysis program will be developed with the main contents as sampling locations, measurement and analysis parameters, manpower, equipment and tools in need, implementation time, sample preservation plan, analysis plan etc.

47. For Nghe An subproject, the Consultant coordinated with the Environmental Monitoring Agency to monitor, take and analyze samples of air, water and soil in 13 reservoirs to assess the current quality of environment components. The sampling, analysis and preservation are in accordance with the concerned current standards of Vietnam.

1.3. Implementation arrangement of ESIA report

48. Management of the subproject

- Management unit of Dam rehabilitation and safety improvement (WB8), Nghe An province

- Represent: Mr: Nguyen Hao - Position: Prefect;

- Address: No. 8 Tran Huy Lieu Street, Vinh City, Nghe An Province

- Telephone: (0383) 834.550 - Fax: (0383) 834.550

49. Consultancy unit establishing report ESIA

- Thang Long infrastructure technology construction consultant joint stock company.

- Represent: Mr. Tran Trung Kien - Position: Director.

- Address: No 72/1/4, nest 4, Giap Nhat, Nhan Chinh ward, Thanh Xuan, Ha Noi.

- Phone: 024.35.576.806 Email: [email protected]

50. Joint venture consultancy unit establishing report ESIA

- Technic resources and environment company limited a member

- Represent: Mr. Pham Anh Tuan - Position: Director.

- Address: No 236, Phong Dinh Cang Street, Vinh City, Nghe An Province.

- Phone: 02386.250.236 Email: [email protected]

Table 3: List of persons participating in implementation

No. Full name Specialized Responsibilities1 Phi Thi Hang Environment Captain2 Nguyen Thi Bich Ngoc Environment Environmental specialist No.13 Ngo Thi Phuong Nhung Hydrological - Environment Specialist Hydrology -

Environment No. 14 Nguyen Viet Anh Ecological Ecology expert5 Nguyen Thi Thu Hoai Sociology Deputy team6 Nguyen Văn Chien Sociology Resettlement expert No. 17 Hoang Thu Ha Economics Resettlement expert No. 28 Vu Thi Tinh Sociology Sociology specialist9 Nguyen Quang Ninh Sociology Gender Specialist10 Tran Nhat Thanh Support staff Support staff


mailto:[email protected]

Subproject

CHAPTER II: DESCRIPTION OF SUBPROJECT

2.1. Overview of the subproject

51. Subproject: Repairing and upgrading are to ensure safety for reservoirs of La Nga, Thanh Thuy, reservoir 271, Don Hung, Khe Du, Hoc Nghet, Khe Dung, Ke Sat, reservoir 3/9, Ho Tuan, Hon Mat, Rao Bang and Khe Dua in Nghe An province under the project of dam rehabilitation and safety improvement, WB8 is financed by the World Bank through the Credit Agreement No. 5749-VN dated on 08th April, 2016 with the subproject implementation duration from 2017 to 2022. Based on Decision No. 4638 / BNN-HTQT dated 09th November 2015 by Ministry of Agriculture and Rural Development, the Dam rehabilitation and Safety improvement subproject in Nghe An province is implemented in 12 communes under 8 districts: Yen Thanh, Nghia Dan, Thai Hoa, Do Luong, Nam Dan, Quynh Luu, Tan Ky, Thanh chương.

2.1.1. Name of the subproject

- Subproject: Repairing and upgrading reservoirs La Nga, Thanh Thuy, reservoir 271, Don Hung, Khe Du, Hoc Nghet, Khe Dung, Ke Sat, reservoir 3/9, Ho Tuan, Hon Mat, Rao Bang and Khe Dua in Nghe An province

2.1.2. Owner of the subproject

- Management unit of Dam rehabilitation and safety improvement (WB8), Nghe An province

- Represent: Mr: Nguyen Hao - Position: Prefect;

- Address: No. 8 Tran Huy Lieu Street, Vinh City, Nghe An Province

- Telephone: (0383) 834.550 - Fax: (0383) 834.550

2.1.3. Objective of the project

a. Objective of the project:

52. Support to implementation of program to ensure safety of water reservoirs through rehabilitation and upgrading of prioritized dams, strengthening management capacity and safe operation of dam to protect population and economic - social infrastructure in downstream area.

b. Specific objectives:

- To secure the safety of reservoirs and key works.

- To improve the efficiency of irrigation works in service of intensive cultivation, increase productivity and quality of products, develop specialized areas of high yielding and high economic value, maximize potential of agricultural land in the region.

- To reduce water loss, ensure the water demand for people's life, the development of local industries, and socio-economic development in the subproject area in particular and Nghe An province in general.

- To create natural landscapes, improve the ecological environment, promote tourism development in the region.

2.1.4. Location of subproject implementation

53. Subproject consists of 13 works at the following locations:

Table 4: Geographic location of reservoir under the subproject

No. Name of works

Geographic location

Commune District Google Earth coordinates

1 Don Hung Hung Thanh Yen Thanh Geographical position: North latitude: 19 ° 4'55.52 "N; East longitude: 105 ° 27'8.08" E

2 Ke Sat Tien Thanh Yen Thanh Geographical position: North latitude: 19 ° 6'12.21 "N; East longitude: 105 ° 28'30.80" E

3 Hon Mat Nghia Loc Nghia Dan Geographical position: North latitude: 19 °






No. Name of works

Geographic location

Commune District Google Earth coordinates12'40.70 "N; East longitude: 105 ° 26'38.65" E

4 Khe Dua Nghia Thuan Thai Hoa Geographical position: North latitude: 19 ° 15'55.70 "N; East longitude: 105 ° 31'4.37" E

5 Khe Du Hoa Son Do Luong Geographical position: North latitude: 18 ° 54'17.22 "N; East longitude: 105 ° 22'40.84" E

6 Rao Bang Nam Thanh Nam Dan Geographical position: North latitude: 18 ° 43'56.80 "N; East longitude: 105 ° 30'3.91" E

7 Dap Tuan My Thanh Yen Thanh Geographical position: North latitude: 18 ° 54'42.01 "N; East Longitude: 105 ° 23'21.33" E

8 Hoc Nghet Ngoc Son Quynh Luu Geographical position: North latitude: 19 ° 10'39.35 "N; East longitude: 105 ° 33'56.64" E

9 Thanh Thuy Van Dien Nam Dan Geographical position: North latitude: 18 ° 43'38.47 "N; East longitude: 105 ° 28'46.99" E

10 271 reservoir Ky Tan Tan Ky Geographical position: North latitude: 19 ° 3'27.66 "N; East longitude: 105 ° 17'23.47" E

11 3/9 reservoir Ky Tan Tan Ky Geographical position: North latitude: 19 ° 3'22.63 "N; East longitude: 105 ° 16'46.37" E

12 La Nga Ngoc Son Thanh Chuong Geographical position: North Latitude: 18 ° 46'14.05 "N; East Longitude: 105 ° 24'3.29" E

13 Khe Dung Quynh Thang Quynh Luu Geographical location: North Latitude: 19 ° 14'35.18 "N; East Longitude: 105 ° 35'7.18" E

Figure 1: Locations of subproject reservoirs


Subproject


Subproject

2.2. Status of works and construction solutions

Table 5: Summary of current information of reservoirs and construction works of the Subproject

Location Current status Construction works Pictures1. La Nga

reservoir1. Main dam- Crest: The crest length of the dam L =

242.2m, the elevation of the dam crest is irregular and varies from 22.81 to 23.34m; the width of the dam crest is from 3.7 to 4.14m, not meet current standards. The dam crest is currently not reinforced, when heavy rains appear some slippery muddy points, making it difficult to travel and manage the operation and rescue.

- Dam roof: The upstream slope of the dam is divided into 2 parts: The upper part from the crest to the normal water level has a roof coefficient of 1.7- 2.5, reinforced with a concrete slab of 5m width. The contiguous position between the land roof and the concrete roof was damaged due to landslides; The part from normal water level upwards with a roof factor of 2.0 to 2.7 has not been reinforced yet.

- Downstream slope: with a roof coefficient of 1.6-2.0 is protected by grass planting, the drainage system of the downstream slope is not yet available. When it rains, it will cause surface erosion. In some locations wild tree have been overgrown, making it difficult to travel and check the dam.

- The dam body was built mainly by handwork, soil dams weak adhesion, easy to disintegrate, when heavy rain can

1. Main dam- The main dam is built to elevation +

24.20m; Embankment to create the upper slope side by 1.68 (T / m3) compacted soil, permeability coefficient K=8,3.10-6

cm/s. Length of dam crest 264,20 m, the width of dam surface B = 5.0 m is reinforced with concrete grade M300, thickness of 20cm.

- Upstream slope: Coefficient of slope mTL

= 2,75. From the top of the dam to the elevation of + 21.8m it is reinforced with concrete slabs M300 poured in place with thickness of 12cm; from elevation + 59.5m or less, it is reinforced by dry masonry with thickness of 25cm, macadam layer of 10cm, 1 layer of filter cloth.

- Downstream slope: Coefficient of slope m = 2.5, grass is planted to protect from the crest to the top of the drainage device. Arrange a drainage system for rainwater on the entire dam slope, the drainage system is inclined 45o above the center of the dam, size bxh = (20x20) cm made of M200 concrete, wall and bottom thickness of 10cm.

- Downstream drainage equipment is structured by filter combined with drainage stone; Slope filter consists of 3 layers, the outer layer is structured by dry masonry with thickness of 30 cm. The under layer is macadam (2x4) cm with thickness of 15cm and coarse sand of with

Status of main dam

Status of the upstream dam roof is damaged

The phenomenon of seepage is located at the downstream


Location Current status Construction works Picturesabsorbent through the dam, especially the slot position and left shoulder. At the slot, the dam suffered seepage through layer 1a with a length of 55m from a height of + 16.46m to + 17.66m; The left shoulder segment was suffered seepage through layer 4, with a length of 70m from elevation of + 17.65m to the end of the shoulder. Downstream drainage equipment is currently unavailable.

2. Spillway: - Spillway is arranged at the position of

saddles located about 200m from the left bank of the dam. The form of wide spillway, spillway with soil structure, In recent years, to prevent erosion of overflow thresholds, localities have built up vertical stone wall, with support walls downstream, however the walls were damaged.; Spillway width B = 20.0m; Spillway altitude+22.0m; the upstream and downstream canals, the energy dissipative tank has not been reinforced, and are seriously eroded

3. Intake: - The body of intake is built with

rectangular cut stone, the top is reinforced-concrete with dome shape, 40cm wide and 60cm high; present degraded and leaked; working bridges and valve systems have been damaged, making it difficult to operate the intake culvert; energy dissipative tank and downstream channel have not been reinforced;

4. Management road:

thickness of 15cm. The elevation of the downstream slope drainage equipment is + 18.30m.

2. Spillway- Form: Wide peak overflow threshold,

beyond is energy dissipative tank- Overflow width: B = 20.0 m, overflow

threshold elevation +22.00 m- Flood spillway threshold is made of

reinforced concrete M300, thickness of 40cm;

- Energy disspitative tank has a length of 5.0m, depth of 0.5m, structure of M300 reinforced concrete bottom with thickness of 30cm. The side is made of M300 reinforced concrete M300, thickness of 30cm.

- Reinforced after energy absorption tank, a section of 5m long, concrete structure M200, thickness of 20cm.

3. Intake- Intake length L = 48,0m, slope i = 0.046.

Sewer is steel pipe thickness of 6mm, outside covered with reinforced concrete M300, The ceiling and walls are on average thickness of 25cm, medium bottom thickness of 30cm. Operation house in downstream of the intake is sized (3.7x3.7) m, high 3.3m, the structure is made of brick only mortar M75 thickness of 22cm, reinforced concrete ceiling 200cm, thickness of 10cm. Arrange 2 closed valves, open the VC400 downstream.

4. Management road:- The route started from the inter-commune

of the dam at the position from pile 8 to 11

Status of spillway

Status of intake

Status management road


Location Current status Construction works Pictures- The road to the main dam area has a total

length of 1481.36m, combined with the residential road, it is currently a soil road, some sections are narrow and muddy. In the rainy, flood season, motor vehicles are not accessible, the rescue of the dam when there is a problem is difficult.

road and ends at the No. 3 pile of the main dam, total length of 1481.36 m.

- Cross section: Road width B = 5.0m, road surface wide 3.5m, each side of the roadside is wide 0.75 m; Drainage ditch is designed with trapezoidal cross section, wide bottom 0.3cm, high 0.3m, coefficient of slope m = 1.0. On the route, 5 cross-over drains are arranged.

- Structure: Upper layer made of M300 concrete thickness of 18cm, the bottom liner is a layer of macadam (4x6) with a thickness of 15 cm; curb is covered with soil and stone. Drainage ditch made by masonry stone M100 is thickness of 30 cm , the outer layer is plastered with mortars M75 thickness 1.5cm

2. Thanh thuy

reservoir

1. Main dam- The main dam is 217m long, the dam

face’s width 4m, the dam surface is eroded, dam surface elevation +18.09 18.51m, The stone upstream slope was almost washed away, falling and falling into the reservoir, downstream slope is eroded. Especially, there is a seepage phenomenon on the two shoulders and the most in the left shoulder of the dam.

- Auxiliary dam No.1 long 172m, dam surface is 5m wide on average, earth dam surface has elevation of +18.22 - 18.43m, stone paving reinforced upstream slope is much washed away, many places are landslides, the downstream slope stabilizes quite high growth trees. No seepage occurs.

- Auxiliary dam No.2 long 78m, adjacent to the flood discharge spillway, the width

1. Main dam- Embankment to create the upper slope side

by 1.68 (T / m3) compacted soil, permeability coefficient K = 3.5x10-6 cm/s, Elevation of the dam + 18.80m; The 5m-wide dam face is reinforced with thickness of 20cm concrete grade. Length of dam L = 218.4m; concrete structure M300, thickness of 20cm.

- Upstream slope: Coefficient of slope m = 2.75. from elevation the dam crest 18.80m down to the elevation of +15.50m, it is reinforced with concrete slabs M300 poured in place with thickness of 12cm; From the elevation of +15,50 down to the dam foot, it is reinforced with reinforced concrete M300 The inside is paved with stone, the size of each cell is (5.0x5,0) m. The top-down structure includes a thickness of 25cm layer of anhydrous

Status of main dam


Location Current status Construction works Picturesof the dam surface is 2 - 4.20m, the dam face elevation is +17,30 - 18.04. The dam has not been reinforced yet, so it has been eroded, land collapsed.

2. Spillway: - Spillway with land structure on the left

side of side dam No.2, spill width = 13m, spillway elevation + 16.50m, trapezoidal section has roof factor m = 1.5 -: - 2.0. The right side is dam No.2 which has been eroded due to the flood, downstream of the spillway, there is no energy dissipative tank project, so there is thus much erosion.

3. Intake: - Long 48m, aperture D60, reinforced

concrete sewer pipes are assembled, the outlet valve of the upstream intake is leaked, sewer pipes intake are pitted, collapsed in the drain. valve opening and closing system with cracked concrete pillars, steel core; 40cm wide steel bridge bridge, no railing, so it is very difficult for sewer operation.

4. House under management: - Not yet built

stone, macadam (1x2) cm, thickness of 15cm and filter cloth. M300 reinforced concrete frame beams with beam size (20x40) cm.

- Downstream slope: Coefficient of slope m = 2.5, From the elevation +18.80m to the dam surface +14.50m, arranging drainage ditches in dam slopes and grass growing plots on thickness of 10cm soil layers, alternating. Drainage ditches with dimensions (20x20) cm concrete structure M200, walls and bottoms thickness of 10cm are tilt 1 45o angle to the dam face, Grass is planted in in plot (7´7) m. From elevation +14.50 to elevation +12.00, the slope slope type drainage system is arranged, the top-down structure is a thickness of 25cm layer of stone, below the layer of macadam thickness of 15cm and sand layer thickness of 15cm. Slope from elevation +12.00 or less, layout of prismatic drainage, width of 2.0m. downstream slope m = 1.5, top-down structure including khan stone, macadam (1x2) cm thickness of 15cm, layer of sand lining thickness of 15cm.

- Auxiliary dam 1: Embankment to create the upper slope side by 1.68 (T / m3) Length of dam is 173m, Elevation of the dam crest is + 18.80m, maximum height is 10.80m, width of dam face is 5.0m. The dam surface is reinforced with concrete of M200 thickness of 20cm

- Auxiliary dam 2: Embankment to create the upper slope side by compaction factor Kn =0.95, gk=1.65 T/m3. Length of dam is

Status of spillway

Status auxiliary dam No.1

Status of intake


Location Current status Construction works Pictures73.60m, elevation of the dam crest +18.80, maximum height 4.0m, width of dam face is 5.0m. The dam surface is reinforced with concrete of M200 thickness of 20cm.

2. Spillway- Flood Spillway design with pragmatic

Spillway form, The spillway threshold have elevation + 16.50m,, Spillway width Btr=24m, divided into 2 compartments of 12m each, energy column in the middle wide 1m. The spillway body inside is built of stone M100, outside covered with reinforced concrete M300, thickness of 20cm. Spillway discharge peaks wide 1.5m, Elevation front yard +15.40m, body spillway has height of 2.1m.

- Energy absorption tank has a length of 8.0m, depth of 0.6m, The elevation of energy absorption tank is +14.80m, structure of M300 reinforced concrete bottom of thickness of 40cm. Side wall is gravity wall structure concrete M200.

- New construction of bridge over flood spillway, reinforced concrete beam structure M300 pouring in place, aperture: 2 spans per span 12m long, wide 4.4m, the length of the bridge 25.80m. Design load 0.5HL93. Bridge abutment is gravity concrete wall M200, energy column in the middle with reinforced concrete M300.

3. Intake- Dismantle the old intake to renew the one

at the location which is 3m far from the old intake towards the right. The form of underground discharge with pressure, close and open downstream. Length of


Location Current status Construction works Picturesintake Lc = 64.3m, slope i = 0.002. circular intake with reinforced concrete pipe of M300, diameter D = 600mm, thickness of 6mm. The elevation of the upper intake upstream + 10.45m, The elevation of the intake Downstream + 10.36m.

- Operator downstream of the intake is sized (3.7x3.7) m, high 3.3m, poured ceiling and sliced 1 layer of heat-resistant tiles, Walls are built of bricks and built with mortar M100 thickness of 22 cm, plastering with mortar M100, thickness of 1.5 cm. Arrange 2 valves block VC600 to operate the intake. Energy absorption tank long 5.0 m, deep 0.7m, reinforced concrete structure M250 on steel plate layout thickness of 6mm. The bottom elevation of the Energy absorption tank is + 9.78m.

- Beyond the energy absorption tank, renew the regulating cluster into the main left channel system and the right main channel. Dimension of transition channel segment (1.2x1.1) m with concrete M150 of 40cm in length and 5m in length. Arranging 2 steel valve gates to regulate the flow into the channels and opening, closing with 02 machines V1

4. Build a canal through the Reservoir:- The length of the canal is 700m, the width

is 10m, coefficient of slope m = 1,5.5. House under management:- The management house is designed in

accordance with the level IV house, with an area of 76 m2 which is structured by mortar brick wall M75 with thickness of


Location Current status Construction works Pictures22 cm, foundation of mortar M50 stone, slope floor is structured by reinforced concrete grade M200, which is covered with anti-hot tile.

3. 271 reservoirs

1. Main dam- Dam is 158m long, the average face

width of the dam is from 3.0 to 3.5 m, the elevation of the dam crest is + 62.60m on average, the upstream slope is grafted with paved stones that have been damaged and landslide much, the downstream slope is planted with grass, heavily eroded without drainage ditches, the low dam surface is rugged. No downstream filter

2. Spillway: - The form of spillway is the spillway with

large crest, overflow threshold elevation 59.75m, Currently, overflowing with stone is old, overflowing wide 12.0m, spillway long 120m. The energy dissipative tank is damaged causing strong erosion downstream of the spillway.

3. Intake: - Intake has a length L = 55.0 m, bottom

elevation of upper culvert 53.26m, structure with concrete f40 sewer pipes, Concrete culvert forstrong water infiltration caused piles to peel many positions, the valve upstream of the dam is no longer available. The valve that opened and closed in the downstream tunnel was damaged. The joints are damaged and water leaks. 49 years of exploiting the intake is damaged.

1. Main damEmbankment to create the upper slope side by 1.68 (T / m3) compacted soil, permeability coefficient K = 0.95, Length of dam L=158.0m, Elevation of dam crest TCS +62.60m, Dam structure is as follows.- Dam surface is 5.0m wide, reinforced with

concrete M300 thickness of 20cm.- Upstream slope: Coefficient of slope m =

3, from elevation the dam crest 62.60m down to the elevation of +58.75m, it is reinforced with concrete slabs M300 poured in place with thickness of 12cm, From the elevation + 29.50m or less, reinforce with stone thickness of 25cm, the middle has a layer of macadam thickness of 10cm, the bottom is the filter cloth. Reinforced concrete frame M300, distance each way (5.0x5,0)m surrounded, the cut side binds around (bxh) = (20x35) cm.

- Downstream slope: Coefficient of slope m=2.75, from elevation of the dam crest + 62.60m to elevation + 58.75m, grass is planted in the plot (7´7) m, the oblique shape drainage ditch have size (20x20)cm is structured by concrete of M200 with the thickness of 10cm of bottom slab. At the slit, the filter is made of stone pile, with a slope. Elevation of rock pile + 53.60m, 2m wide, downstream slope m = 2. Slope filter with elevation of + 56.6m consists of 3 layers: layer of sand is thickness of 15cm,

Status of main dam

Status of spillway


Location Current status Construction works Pictures- Since the intake is too old, the loss of

water at the two ends and the loss of water due to the sewer drain is broken and the damaged valve so the amount of water loss is very much.

4. Management road:- Length of 167.8m, starting point from

Ho Chi Minh trail, end point ends at the foot of the dam, some sections are very narrow and muddy, some sections of drainage canal run along along the road, causing serious erosion. Currently, motor vehicles cannot travel during the rainy season, therefore, the rescue of the dam faces many obstacles, putting the construction at risk when the dam breaks.

macadam layer is thickness of 15cm, outside is protected by stone with thickness of 30cm. Arrangement of drainage ditches on the downstream side of the dam is adjacent to the hill.

2. Spillway- The form of spillway is the spillway with

large crest, Beyond is the water slope, Energy dissipation by energy absorption tank, consists of 2 levels. Flood discharge aperture B = 20m, spillway threshold elevation (+59.75)m, overflow threshold has M300 reinforced concrete structure, thickness of 30cm. Rear water slope are 45.4m long, word width (20,0 -: - 12,0); Bridge abutment is gravity concrete wall M200, high (2.0 -: - 2.85) m, wall top wide 0.3m, wide bottom plate (1.6 -: - 2.0) m, thickness of 60cm; Energy absorption tank consists of 2 levels, each level is 18.0m long, deep 1.0m, wide 12.0m, the structure of M300 reinforced concrete bottom is thickness of 50cm , side walls of reinforced concrete M300, thickness of (30 -: - 80) cm.

3. Intake- The form of underground discharge with

pressure.- Structure: Intake with steel pipe D400,

thickness of 6mm outside of reinforced concrete M300 with a thickness of 25cm, length of intake L = 55.20m. Elevation of the bottom of the intake + 53.26m, Intake slope i = 0.001. Operator downstream of the culvert is sized (3.7x3.7) m, high 3.3m, the structure is made of brick only mortar

Tunnel downstream valve was damaged

Management road is a dirt road


Location Current status Construction works PicturesM75 thick 22cm, reinforced concrete ceiling 200cm, thick 10cm. Arrange 2 closed valves, open the VC400 downstream.

4. Management road:- Length of route 167.8m, starting point

from Ho Chi Minh trail, the end point ends at the foot of the dam. The roadbed is 5.0m wide, covering compacted soil K = 0.95, the road surface is 3.5m wide, On-site concreting structure M300 has a thickness of 18cm, bottom of macadam lining (4x6) cm has a thickness of 15cm, compacted.

4. Don Hung

reservoir

1. Main dam- Homogeneous earth dam long 858.0m,

dam crest elevation + 43.00m (wavewall top), maximum dam height hd = 14.0m, embankment soil is heterogeneous and has many grains, the previous method of embankment dams is mainly manual and does not handle the adjacent waterproofing between the dam body and the foundation therefore, there are now permeability sites along according to the position adjacent to the dam body and the ground from elevation + 29.1m to elevation + 31.10m, thickness is about 2m. According to the geological survey report, the current dam penetrates through the layer (1) with permeability coefficient K=1.7´10-4cm/s; On the dam surface, there is a seawall on the upstream side with high altitude H = 100cm, stone texture, some sections have been cracked and damaged, there is no

1. Main dam- The main dam has a length Ldc = 858.0m.

The maximum height Hd = 14.0m. Elevation of dam crest TCS +43.00m, breakwater height 0.7m. Structure of reinforcement concrete of M300.

- Upstream slope: Embankment to create the upper slope m = 3.0; Dam surface is structured by concrete M300 with thickness of 20cm and width 5.0m. Reinforcement of the upstream slope: from the elevation +39.0m to the dam surface +42.30m, it is reinforced with concrete slabs M300 poured in place with thickness of 12cm; from the elevation of +39.0m to the elevation +32.0m, it is reinforced by dry masonry with thickness of 25cm, macadam layer of 10cm, 1 layer of filter cloth. In the frame, it is structured by reinforced concrete M300 with the size of each box (5.0x5.0) m and cross section of (0.25x0.35) m.

Status of damaged upstream slope, subsidence


Location Current status Construction works Picturesdownstream edge so it is difficult and dangerous for the operation to be checked dam in the rainy season. In particular, the breakwaters broken in 1978, the breakwaters were cracked and tilted towards the upstream of 100m long dam. The dam face width, including wave retaining wall is: B = 3.0m, the surface of the dam is uneven and has not been hardened.

- The dam body is weak, in 1978 the dam broke at the middle of the dam with a break length of about 120m, now that position has subsided lower than the average elevation of the average design dam about 7cm;

- The upstream slope has been reinforced with anhydrous paving stones, however after a period of operation due to impact during the rising and falling of the Reservoir water level and the impact of waves in the reservoir so most of this upstream slope block has been damaged and dropped to the reservoir, causing instability and no longer ensuring the task of protecting the upstream dam. There are many sections of reinforced roof slumped to the Reservoir bed compared to the design of 20cm and there are positions of deep subsidence 30cm (the location of the dam was broken in 1978).

- The scope of the downstream slope of the reservoir, currently there is an infiltration flow in the downstream at the junction between the dam body and the

- Downstream slope: coefficient of slope of m = 2.75, from dam surface to elevation +36.50m, grass is planted in in plot (7´7) m, the oblique shape drainage ditch have size (20x20) cm is structured by concrete of M200 with the thickness of 10cm of bottom slab. At elevation +36.50m it has the width of b = 3.0m. Downstream drainage equipment is structured by filter combined with drainage stone; Slope filter consists of 3 layers; the outer layer is structured by dry masonry with thickness of 30 cm. The under layer is macadam with thickness of 15cm and coarse sand of with thickness of 15cm. Elevation of drainage pile +31.40m, outer slope m = 2.

2. Auxiliary dam:- Auxiliary dam with length: Ldp = 135.0m.

Maximum height Hp = 4.7m. Height of dam crest +43.00m.

- Upstream slope: Embankment of the upper slope m = 2.5; Dam surface is structured by concrete M300 with thickness of 20cm and the width of 5.0m. Reinforcement of upper slope from the foot to the top of the dam which is reinforced by concrete slab with thickness of 12cm.

- Downstream slope: Planting grass for protection

3. Spillway- Dismantle the old wing wall on the right

shoulder of spillway, extend the Spillway weir to Bng = 55.0m. The Spillway weir of expanded section is structured by concrete M300 with thickness of 30cm. Spillway

Retaining walls are damaged, cracked

Downstream slope is eroded, subsidence

Appears to osmotic at adjacent sites between the dam body and the foundation

Some locations appear seepage holes downstream


Location Current status Construction works Picturesfoundation along the length of the dam site. Due to long-term operation, the dam slope is eroded and subsided, causing the dam slope to be concave, the foot of the roof is eroded, the foot of the roof is damaged. Some occurrences and porous soil mounds due to worms, these problems need to be dealt with promptly and thoroughly, if left for a long time, it will adversely affect the stable work of the construction.

2. Auxiliary dam- Dam has a soil structure, located on the

left shoulder of the flood discharge spillway, with a length of 170.0m, elevation of dam crest + 42.30m, maximum dam height of 3.8m, width of dam face of 2.6m, no wave wall upstream. The upstream slope reinforced with anhydrous paving stone, was badly damaged; downstream slope has many weedy plants growing, the surface of the dam has not been hardened.

- On the left side of the dam: In 2013, due to heavy flood protection, affected the safety of the dam, so broke 1 section of 15.0m to elevation of + 41.40m to do the spillway. And by 2018 this threshold will continue to be lowered to the elevation of + 40.0m. Due to the beyond flood spillway is the area of productive land (garden land) of the people and there are households living beyond the spillway, If the flood spillway elevation is at the elevation of + 40.0m, this flood discharge spill acts as the main spillway,

slope is reinforced by concrete M300 with thickness of 20cm and coefficient of slope m = 1. Reinforcement of chute connecting with the expanded section with the length of L = 44m, the slope i = 10.6% which is equal to the current slope of the spillway; the structure of bottom slab is structured by concrete M300 with thickness of 30 cm. Keep the status of the old slope and the stilling basin

- Construct flood discharge path beyond the spillway with a length of 50m and width of 5m, structure of concrete of grade 300 with thickness of 20cm; Drainage intake has the aperture of 2´(1.5´1.5) m which is reinforced concrete structures of grade 300; The bottom slab, wall and ceiling have thickness of 30cm.

4. Intake- Dismantle the old intake to renew the one

at the location which is 3m far from the old intake toward the hill. The form of underground discharge with pressure, circular intake with reinforced concrete pipe of M300, diameter D = 800mm, steel with thickness of 8 mm, total length of L = 80.50m, regulating downstream and upstream valve. Elevation of intake is +32.30m.

5. House under management: - The management house is designed in

accordance with the level IV house, with an area of 76m2 which is structured by mortar brick wall M75 with thickness of 22 cm, foundation of mortar M50 stone, slope floor is structured by reinforced

Auxiliary dam crest small, not yet hardened

The aperture of a circular sewer with assembled sewer pipes has been damaged

The valve door is not watertight, the machine opens and the working bridge is damaged


Location Current status Construction works Picturesthus causing erosion and affecting households living beyond the flood spillway. The proposed design consultant will return this flood spillway threshold at + 41.40m elevation, this flood spill only works when floods occur to limit erosion and less impact on households’ downstream people spill flood.


large crest, free flowing, Spillway width of old the original design L = 21.5m; In 2017, the new spillway is expanded by 16.5m in the right shoulder according to the annual flood recovery fund, so the current overflow width is 38m. The elevation of the overflow threshold is: 40.0m (normal water level). Structural threshold of reinforced concrete is still good. Continuing with the flood overflow threshold is a slope with a trapezoidal cross-section with a roof coefficient m = 0.25, reinforced with concrete, is still good, At the end of the slope is the water falling Lr=10.0m, beyond the falling water section is the energy dissipative tank has a step structure: Hb1=2.0m, Hb2=1.9m, Lb = 20.75m Reinforced concrete structure, still good.

- Spillway threshold: Not enough aperture to escape flood.

4. Intake: - The intake is located on the right

shoulder of the main dam, the form of underground discharge with pressure

concrete grade 200 which is covered by anti-hot tile.

6. Dam observation facilities:- Installing subsidence and permeability

measuring equipment, automatic monitoring equipment for water level of Don Hung reservoir

7. Management road:- Route length L = 130,0m, width Bn =

4.0m; width of foundation bm = 3.0m. Surface of concrete M250 with thickness of18cm, under layer is macadam lining (4´6) with thickness of 15cm.

Spillway and energy dissipative are still good

Small manager house, is badly damaged

Management road is a dirt road


Location Current status Construction works PicturesMade of assembled concrete tubes, intake threshold set at + 32.30m elevation, upstream damper with flat valve not watertight; Operated by screw machine and without towers house, working bridge, operation of water suction valve structured reinforced concrete structure, wide b = 0.80m, handrail has been damaged.

- Basically, the intake sewer still ensures temporary operation and gets enough water flow, however, the works has existed for 47 years nearly the end of the life of the works, so the reinforced concrete structure of the sewer pipes to get water has been eroded, peeling in many locations therefore, the drain body is easily damaged; The joints are badly damaged; The operation of upstream valves is difficult and unsafe for workers to operate in the rainy season.

5. House under management: - House under management are built on the

right of the main earth dam, with a small area of about 25m2, decayed, Without living facilities, managers cannot use them as management, operation and inspection facilities.

6. Management road:- At present, there is a management road

going into the project going from the inter-commune axis to the right of the main dam with a length of 130.0m. At present, this road is dirt road, has not been hardened, so the traveling is very difficult, in the rainy season, the


Location Current status Construction works Picturesmotorized vehicles cannot walk. Moreover, there road currently has no connection to the dam surface, so traveling by motor vehicle is very difficult.

5. Khe Du reservoir

1. Main dam- About length 150m, 8.2m high, upstream

slope m = 2, downstream slope m = 1.5, the dam surface is from 3.0 - 3.5m high, elevation of dam crest with original design + 20.85m, According to the time under the effect of weather abraded the dam surface, the elevation of the average dam crest is + 20.15m. Embankment soil has many grains, the dam construction is the manual method and the dam foundation has not been treated yet, therefore, currently along the length of the dam L = 108m, there is a phenomenon of seepage through the dam at layer 2a with the length of 16.5m from the elevation of + 12.8m to the elevation of the old dam crest and adjacent to the dam between the old dam body and the dam foundation length + 91.5m at layer 1 from elevation + 9.85m to + 12.95m elevation; Water leaked out into small and opaque. Protection of upstream slope with stone, has been damaged. The grass downstream of the grass is heavily eroded, there is no drainage equipment, the section of the dam is too small, the dam surface is low and rugged.

2. Spillway: - Spillway is located in the right shoulder

of the dam, the threshold is 10m wide,

1. Main damLength of dam L =157.6m; elevation of the dam crest +20.85m; Embankment to create the upper slope side by 1.68 (T / m3) compacted soil, permeability coefficient K = 0,95, Dam structure is as follows:- The 5m-wide dam face is reinforced with

thickness of 20cm concrete grade; breakwater height 0.7m, concrete structure M300.

- Upstream slope: from elevation the dam crest 20.15m down to the elevation of +17.75m, it is reinforced with concrete slabs M300 poured in place with thickness of 12cm; from elevation + 17.75m or less, it is reinforced by dry masonry with thickness of 25cm, macadam layer of 10cm, 1 layer of filter cloth. In the frame, it is structured by reinforced concrete M300 with the size of cross section of (0.25x0.35) m.

- Downstream slope: from dam surface to elevation +15.25m, grass is planted in in plot (7´7) m, the oblique shape drainage ditch have size (20x20)cm is structured by concrete of M200 with the thickness of 10cm of bottom slab. From the elevation + 15.25m to the foot of the dam reinforced by stone slices thickness of 30cm, under the layer of macadam thickness of 15cm and layer of sand with a thickness of

Small dam crest, upstream slope has not been reinforced

Downstream slope is landslide, seepage at dam body and dam foundation


Location Current status Construction works Picturesnewly built is still good, the spillway long 30m, is currently a channel and has not been reinforced. Spillway on strong weathered rock.

3. Intake: - The intake round drain has aperture D =

40cm, elevation of upstream bottom intake (+12.70) m. Over the years, the operation of the intake culvert has been seriously degraded: The entrance and exit doors of stone construction have been damaged and peeled, the valve system, the working bridge, and the opening and closing machines have been damaged, damaged rubber gasket, not watertight, appear infiltration flow downstream in valve position, the drain coupling is damaged water leak. Therefore, the ability to ensure safety for the dam is not guaranteed. Alternative measures should be taken to renew the intake sewer to ensure long-term, watertight and safe for the main dam.

15cm.2. Spillway- The form of spillway is the spillway with

large crest, Flood spillway aperture B = 10m, keep the old spillway with elevation the Spillway threshold (+18.75) m. Reinforcement after a threshold spillway of 25.0m long, slope = 0.02, width 10.0m, structure of the bottom and slope of M300 reinforced concrete reinforced concrete. Elevation of the slope + 18.05m, end of slope + 17.55m.

3. Intake- Intake has aperture D400mm, elevation of

upstream sluice gates (+12.70) m, long intakes L = 44.67m, slope i = 0.001. Structure of intake is steel pipe is thickness of 6mm, circular intake with reinforced concrete pipe of M300. The ceiling and walls are thickness of 25cm on average, the average thickness of the bottom is 30cm. Arrange 2 closed valves, open the VC400 downstream. Operator downstream of the intake is sized (3.7x3.7) m, high 3.3m, the structure is made of brick only mortar M75 thickness of 22cm, reinforced concrete ceiling 200cm, thickness of 10cm.

The upstream slope has been damaged

Spillway threshold newly built, the spillway has not been reinforced

Status of intake


Location Current status Construction works Pictures6. Hoc

Nghet reservoir

1. Main dam- At present, the dam is length 155m, high

13.0m, the dam surface is wide (3.0 - 4.0) m, the elevation of the average dam is + 31.70m. The upstream slope reinforced stone is assembled from the elevation (+24.5) m to the dam face, has been eroded and damaged many places. Downstream slope be planted grass, the downstream slope has some landslides, no filter pressure downstream. width of dam is small, not enough design width. Previous embankment soil is of poor quality and has not been treated against waterproofing so the water permeability is relatively strong through the dam body and the dam foundation; 2 shoulder positions of seepage dam through layer 3 with a length of 85m from elevation + 23.95m to the old dam crest elevation; The section between the permeability dam body through layer 1 has a length of 70m from elevation + 16.59m to elevation + 19.59m, Adjacent seepage treatment is required to ensure dam safety and water loss due to seepage.

2. Spillway: - Located on the left side of the reservoir,

200m away from the main dam, spillway aperture BT = 6m, threshold elevation (+30.40) m, The form of spillway is the spillway with large crest, spillway is currently structured by soil, downstream of flood spillway is strongly eroded due to flood.

3. Intake:

1. Main damLength of dam L=161.0m, Elevation of dam crest TCS +32.70m; Embankment to create the upper slope side by 1.68 (T / m3) compacted soil, permeability coefficient K = 0,95, Dam structure is as follows:- Dam surface is 5.0m wide, reinforced with

concrete M300 thickness of 20cm; breakwater height 0.7m. Structure of reinforcement concrete of M300.

- Upstream slope: Coefficient of slope m = 3. from elevation the dam crest 32.00m down to the elevation of +29.50m, it is reinforced with concrete slabs M300 poured in place with thickness of 12cm. From the elevation + 29.50m or less, reinforce with stone thickness of 25cm, the middle has a layer of macadam thickness of 10cm, the bottom is the filter cloth. Reinforced concrete frame M300, distance each way (5.0x5.0) m surrounded, the cut side binds around (bxh) = (20x35) cm.

- Downstream slope: Coefficient of slope m=2.75. From the elevation +32.00m to the dam surface +26.40m, grass is planted in in plot (7´7) m, the oblique shape drainage ditch have size (20x20)cm is structured by concrete of M200 with the thickness of 10cm of bottom slab. From the elevation + 26.40m to the the elevation + 23.40m, stone reinforcement thickness of 30cm, under the macadam lining with a thickness of 15cm and sand with a thickness of 15cm. From altitude + 23.40m down to the foot of the dam is arranged with drainage rock pile, pile

Status of the dam crest

Status of management road

Appeared permeability positions at the downstream of the dam


Location Current status Construction works Pictures- The intake round drain has aperture D =


4. Management road:- About length 273.3 m, connecting the

inter-commune road to the dam foot, some sections are very narrow and muddy, some sections of the drainage canal run along the road, causing serious erosion. Currently, motor vehicles can't circulate during the rainy season, so the rescue of the dam faces many obstacles, endangering the risk to the construction when the dam is broken.

height + 23.40m, width of 2m, upstream slope m = 1.5, downstream slope m = 2.

2. Spillway: The form of spillway is the spillway with large crest- Spillway width B = 10.0m.- Wide peak spillway threshold, spillway

threshold elevation +30.4m, concrete structure M300.

- Energy absorption tank is 8.0m long, deep 0.6m, structure of reinforced concrete bottom M300 with a thickness of 30cm, energy absorption bottom have elevation of + 29,30m, side slope with M300 reinforced concrete structure with a thickness of 20cm.

- Reinforced after energy absorption tank with a length of 5.0m, structure of bottom and side of slope with reinforced concrete M300 with thickness of 20cm.

3. Intake- The intake drains pressure water, designed

with D400 steel pipe, thickness of 6mm, outside coated M300 reinforced concrete, average thick bottom plate 30cm, walls and ceilings are thickness of 25cm on average; intake length L = 59.60m. Elevation of the bottom of the intake + 22.71m, intake slope i = 0.001. Operator downstream of the intake is sized (3.7x3.7) m, high 3.3m, the structure is made of brick only mortar M75 thickness of 22cm, reinforced concrete ceiling M200, thickness of 10cm. Arrange 2 closed valves, open the VC400 downstream.

4. Management road:- Renovating and upgrading management

Status of intake

Status of spillway


Location Current status Construction works Picturesroad from inter-commune roads to dams with a length of 273.3 m. The roadbed is 5.0m wide, the road surface is 3.5m wide, the road surface is reinforced-concrete in place M300 has a thickness of 18cm, the bottom of macadam lining (4x6) cm has a thickness of 20cm, compacted.

7. Khe Dung

reservoir

1. Main dam- The main dam has a soil structure, soil

has good waterproofing ability but due to construction completely by handmade, so the compression is not guaranteed. The permeability phenomenon does not appear along the length of the dam site but appears relatively large permeability at the slit. Through observation at the scene when the Reservoir water level rises at the downstream position of the at the slit with saturated mud phenomenon.

- The upstream slope of the roof slope coefficient m = 2 has not been reinforced, should be struck by the waves causing erosion. Currently the upstream dam roof is located at approximately the normal water level, almost vertical, the lower part of normal water level is covered by erosion of the soil, the downstream slope has only protection grass.

2. Spillway: - Spillway at the position of the right

shoulder of the main dam has a central position perpendicular to the main dam. Flood spillway width of 20m, spillway length of 90m, spillway elevation + 29.00m. Spillway is placed on a geologic

1. Main dam- Length of dam L=244.5m; elevation of the

dam crest +31,80m; Embankment to create the upper slope side by 1.68 (T / m3) compacted soil, permeability coefficient K = 0.95. The biggest dam height H=8,2m, dam face width B=5,0m. Dam surface reinforced with concrete M300 thickness of 20cm; breakwater height 0.7m, concrete structure M300.

- Upstream slope: Coefficient of slope m = 2.75. from elevation the dam crest 31.10m down to the elevation of +29.80m, it is reinforced with concrete slabs M300 poured in place with thickness of 12cm. From the elevation + 29.8m or less, reinforce with stone thickness of 25cm, the middle has a layer of macadam (1 × 2) cm thickness of 10cm, the bottom is the filter cloth. Vertical frame and slope crossover frame have size (25 × 35) cm, reinforced concrete frame structure M300.

- Downstream slope: Coefficient of slope m=2.5, reinforce downstream slope with grass planting. Downstream slope isarranged with drainage ditches in 45o

oblique squares. The distance between the grooves is 7.7m, rectangular sectional drainage ditches in size (20 × 20)cm,

The upstream slope is not reinforced

Downstream slope and some positions absorbent


Location Current status Construction works Picturesfoundation that is solid rock, but the texture is uneven. Spillway structure on both sides is built stone, overflow surface is stone. Past the time of using the stone surface at the surface of the overflow and the two sides of the slope are not reinforced, so the stone is weathered and cracked. Every year, due to big floods, causing strong erosion on the spillway surface, the flood discharge surface becomes jagged and has many erosion channels. It is this phenomenon that caused the flow disturbance causing potholes on the spillway surface to increase the overflow erosion. Currently, the formation of erosion grooves at the foot of the wall on the left side of the spillway causes collapse of the side wall, and every year people use the gabion to reinforce it but still not guaranteed. Need to recalculate aperture, spillway threshold, reinforce spillway protection.

3. Intake: - On the left shoulder of the dam, the

length of the intake is about 30m, the form of circular sewer with prefabricated concrete pipe is assembled on the concrete pedestal, the pipe diameter D = 40cm. The elevation of the entrance to the intake gate is + 25.9m, the elevation of the outlet gate for intake is + 20.2m. The gate to the intake gate is arranged with a valve operating in the form of cork, only with the valve without the working bridge. downstream of the culvert for water intake there is no

Groove structure with concrete M200 thickness of 10cm. downstream drainage by slope embankment, elevation of slope top of embankment +27.00m, The structure consists of 3 layers: The outer layer is a thickness of 30cm stone layer, the middle layer is macadam thickness of 15cm, the bottom layer is sand layer thickness of 15cm.

2. Spillway: Flood spillway: reality cross section, energy absorption tank- Door to flood Spillway: The door section

is 10.8m long, trapezoidal cross section has a wide base (35.2 -: - 31.2) m, reinforced with concrete M300 with thickness 20cm; Side wall is in the form of a wide bottom wall (80 -: - 200) cm, thickness of 40cm. High back wall (50 -: - 350) cm, layout 3 anti-thick plates 30cm, coefficient of slope m = 0.3, reinforced concrete wall structure M300.

- Spillway threshold: Cross section Spillway threshold is trapezoidal, The width of the spillway threshold of 3 compartments, each with a width of 10m, elevation the Spillway threshold of + 29.0m. The cross section of the spillway threshold has a trapezoidal shape and a wide peak of 1.0m, 3.0m wide, 2.2m high, sloping upstream perpendicular to the ground. Downstream slope m=1. The internal overflow threshold structure is concrete M200, The exterior is covered with concrete M300 thickness of 20 cm.

- Energy absorption tank: At the threshold of the spillway, arranged energy

The phenomenon of erosion in the position to the left of the spillway

Status of intake

The exit gate intake eroded water


Location Current status Construction works Picturesenergy dissipative tank and the main canal has not been concrete yet. Through many years of operation, the sewer valve upstream of the water is warped, the inlet is covered with mud and sand, so it cannot close the valve, causing a big leak through the intake gate. Besides, due to manual construction, should cause seepage at the location where the drain is intaken. The sections of the assembled culvert body do not have water barrier joints so there is a current of water leaking through the joint. Beyond the drain when discharging water because there is no energy dissipative tank therefore, create deep holes at the foot of the dam creates a risk of instability of the dam at the cross section of intake.

4. Management road:- The status quo is damaged concrete road

and a dirt road adjacent to the dam.

absorption tank of 10m long, wide 31.2m, deep 0.6m. Elevation of energy absorption tank bottom + 49.1m. Structure of bottom of energy absorption tank with reinforced concrete M300 is thickness of 30cm; Walls in the form of rib wall 10m long, section of crank wall is 3.45m long, Magnetic height (2.1 -: - 4.5) m, wide bottom plate (140 -: - 240) cm, thickness of 40cm, high back wall (210 -: - 450) thicknes of 30cm, arranged 5 anti-thick plates 30cm, Coefficient of slope m = 0.3, reinforced concrete wall structure M200.

- Beyond the tank absorbs energy: Beyond the energy absorption tank, design a 10m length channel, trapezoidal cross-section, 30.2m wide bottom, 2.1m high, Coefficient of slope m = 1.5. The bottom and roof of the canal reinforced with reinforced concrete M300 thickness of 30cm. Elevation of backyard bottom from +28.60 to + 26.60m.

- Bridge over Spillway: Making the bridge bridge over the spillway, bridge length consists of 3 spans of 11m long, surface width of the bridge 3.5m. Simple, seamless T beam structure with bridge surface. Arranging 3 bearing beams of size (30 × 80) cm in series with the bridge surface, with a thickness of 20 cm in reinforced concrete M300. Handrail of M300 reinforced concrete bridge with height 85cm. Elevation of bridge surface + 31.8m. Design a abutment pier between 2 spans of 3 parts: bridge abutment pier foundation size (2.6 × 2 × 0.6) m,


Location Current status Construction works Picturesabutment pier body size (2,6×0,6×3,7) m, abutment size (3,2×1,4×0,5)m, structural abutment pier is structure of reinforced concrete M300

3. Intake- Intake length L = 28.03m, slope i = 0.002.

Structure of intake is steel pipe thickness of 6mm, circular intake with reinforced concrete pipe of M300. The ceiling and walls are thickness of 25cm on average, the average thickness of the bottom is 30cm. Arrange 2 closed valves, open the VC400 downstream. Operator downstream of the intake is sized (3.7x3.7) m, high 3.3m, the structure is made of brick only mortar M75 thickness of 22cm, reinforced concrete ceiling 200cm, thickness of 10cm.

4. Management road:Upgrade the current land route as a management road connecting the dam surface, length 700m with the following design parameters:- Design cross section: Road width Bn =

5.0m; Road surface width Bm = 3.5m, road surface slope i = 2%; Width of the roadside Blđ = 0.75m × 2 = 1.5m, slope of the roadside i = 4%.

- Road shirt texture: Upper layer with concrete M300 thickness of 18cm; The stone layer (4x6) is compacted with a thickness of 15cm.

- Roadbed: Peel off weathered roadbed thickness of 30cm, embankment of road with hill soil K = 95; position of excavated road base on both sides is arranged with


Location Current status Construction works Picturestrapezoidal drainage ditch, bottom wide 40cm, slope m = 1.5, high 50cm.

8. Ke Sat reservoir

1. Main dam- Homogeneous earth dam long 572.9m,

dam crest elevation + 34.50m (wavewall top), maximum dam height hd = 10.5m, embankment soil is heterogeneous and has many grains, the previous method of embankment dams is mainly manual and does not handle the adjacent waterproofing between the dam body and the foundation therefore, there are now permeability sites along the according to the position adjacent to the dam body and the ground from elevation + 21.7m to elevation + 23.9m, thickness is about 2.2m. According to the geological survey report, the current dam penetrates through the layer (1) with permeability coefficient K=4.5´10-

4cm/s. The dam face width, including wave retaining wall is: B = 3.8m, the surface of the dam is uneven and has not been hardened. On the dam surface, there is a seawall on the upstream side high altitude H = 60cm, stone texture, some sections have been cracked and damaged, there is no downstream edge so it is difficult and dangerous for the operation to be checked dam in the rainy season.

- The upstream slope, below normal water level has been reinforced with anhydrous paving stones, however after a period of operation due to impact during the rising and falling of the

1. Main dam:- The main dam has a length Ldc = 576.50m.

The maximum height Hd = 10.5m. Elevation of dam crest TCS +34.50m, breakwater height 0.7m. Structure of reinforcement concrete of M300.

- Upstream slope: Embankment to create the upper slope m = 3.0; Dam surface is structured by concrete M300 with thickness of 20cm and width 5.0m. Reinforcement of the upstream slope: from the elevation +30.2m to the dam surface +33.80m, it is reinforced with concrete slabs M300 poured in place with thickness of 12cm; from elevation + 30.2m or less, it is reinforced by dry masonry with thickness of 25cm, macadam layer of 10cm, 1 layer of filter cloth. In the frame, it is structured by reinforced concrete M300 with the size of each box (5.0x5,0) m and cross section of (0.25x0.35) m.

- Downstream slope: coefficient of slope of m = 2.75, from dam surface to elevation +29,20m, grass is planted in in plot (7´7) m, the oblique shape drainage ditch have size (20x20)cm is structured by concrete of M200 with the thickness of 10cm of bottom slab. At elevation +29.20m has the width of b = 3.0m. Downstream drainage equipment is structured by filter combined with drainage stone; Slope filter consists of 3 layers, the outer layer is structured by dry masonry with thickness of 30 cm. The under layer is macadam with thickness of

Status of main dam

.Status of downstream slope


Location Current status Construction works PicturesReservoir water level and the impact of waves in the reservoir so most of this upstream slope block has been damaged and dropped to the reservoir reservoir causing instability and no longer ensuring the task of protecting the upstream dam. The upper part of the normal water level has not been reinforced.

- The scope of the downstream slope of the reservoir, currently there is an infiltration flow in the downstream at the junction between the dam body and the foundation along the length of the dam site. Due to long-term operation, the dam slope is eroded and subsided, causing the dam slope to be concave, the foot of the roof is eroded, the foot of the roof is damaged. Some occurrences and porous soil mounds due to worms, these problems need to be dealt with promptly and thoroughly, if left for a long time, it will adversely affect the stable work of the construction.

2. Auxiliary dam- At present, the auxiliary dam line

combines roads connecting the inter-commune road to the left shoulder of the main dam with the length L = 906.0m. The earth dam is of the same nature, the elevation of the dam crest is + 33.80m, the height of the largest dam is 2.9m, the width of the dam surface is combined with the 5.0m traffic road. The upstream slope has not been reinforced and protected, with many weeds, dam crest is

15cm and coarse sand of with thickness of 15cm. Elevation of drainage pile +24.50m, outer slope m = 2.

2. Auxiliary dam:- Auxiliary dam with length: Ldp = 906.0m.

Maximum height Hp = 4.0m. Height of dam crest +34.50m.

- Upstream slope: Embankment of the upper slope m = 2.5; Dam surface is structured by concrete M300 with thickness of 20cm and the width of 5.0m. Planting grass protection.

- Downstream slope: Coefficient of slope m = 2. Planting grass protection.

3. Spillway: The form of spillway is the spillway with large crest. Construction of Energy absorption tank after spillway.

- Elevation of Spillway + 31.20m, reinforced concrete structure M300 is thickness of 40cm.

- Energy absorption tank have a length of 5.0m, depth of 0.5m, structure of M300 reinforced concrete bottom of thickness of 30cm, elevation of bottom of the Energy absorption tank + 30.7m.

- After 5m energy dissipative tank, is reinforced with the bottom and side slope of concrete M200 with thickness of 15cm.

- Building bridges over spillways, load design 0.5HL93, length L = 75.3m, including 5 spans, each span is 15.0m, structure of girder, girder size (b x h) = ( 34x100) cm, the width B = 4.2m, Reinforced concrete structure M300, thickness of 15cm. Bridge abutment 2.3m high, bottom plate 2.8m wide, thickness of

Appeared seepage holes downstream of the dam

Status of spillway

Status of intake

Status of House under management


Location Current status Construction works Picturesnot hardened yet.

3. Spillway:- Spillway combine to make roads.

Spillway width B = 60.0m, spillway elevation elevation is: + 31,2m (normal water level). Serial threshold is the channel with slope i = 0.0008, roof coefficient m = 1.5m, length L = 618.8m. The discharge canal has been eroded with uneven slope and narrow section. Overflow threshold: due to spillway combined with roads, The surface has not been hardened so the threshold spillway is not flat.

4. Spillway incidents- Newly built incident spill is 30m wide;

Elevation spillway threshold of + 32.65m.

5. Intake:- The intake is located on the right

shoulder of the main dam, aperture D = 800mm, the form of underground discharge with pressure made of assembled concrete tubes, intake threshold set at + 24.80m elevation, upstream damper with flat valve not watertight; Operated by screw machine and without towers house, working bridge, operation of water suction valve structured reinforced concrete structure, wide b = 0.80m, handrail has been damaged.

- Basically, the intake sewer still ensures temporary operation and gets enough water flow, however, the works has existed for 45 years nearly the end of the

1.0m, reinforced concrete structure grade M300; high piers 2.3m, bottom plate size (5.2x2.2) thickness of 1.0m, reinforced concrete structure M300.

4. Intake: - Dismantle the old intake to renew the one

at the location which is 3m far from the old intake toward the hill. The form of underground discharge with pressure, circular intake with reinforced concrete pipe of M300, diameter D = 800mm, steel with thickness of 8 mm, total length of L = 76.20m, regulating downstream and upstream valve. Elevation of intake is +24.70m.


accordance with the level IV house, with an area of 76 m2 which is structured by mortar brick wall M75 with thickness of 22 cm, foundation of mortar M50 stone, slope floor is structured by reinforced concrete grade M200 which is covered by anti-hot tile.

6. Dam observation facilities: - Installing subsidence and permeability

measuring equipment, automatic monitoring equipment for water level of Ke Sat reservoir.

Status of energy dissipative tank


Location Current status Construction works Pictureslife of the works, so the reinforced concrete structure of the sewer pipes to get water has been eroded, peeling in many locations therefore, the drain body is easily damaged; The joints are badly damaged; The operation of upstream valves is difficult and unsafe for workers to operate in the rainy season

6. House under management- House under management on the right of

the main dam with a small area of about 40m2 have been decayed and lack of living equipment.

9. 3/9 reservoir

1. Main dam- The dam is length 160.0 m, the average

face width of the dam is from 3.0 to 3.5 m, the elevation of the dam crest is in the original design is: + 40.80m, because the project was built long under the effects of the weather has abraded the dam surface, at present the average elevation of the dam is: + 40.2m. the previous method of embankment dams is mainly manual and does not handle the adjacent waterproofing between the dam body and the foundation therefore, there are now permeability sites along the according to the position adjacent to the dam body and the ground, seepage water through layer 2 appears from the elevation of + 35.06m to the elevation of + 37.06m. The upstream slope which is grafted with anhydrous stone, is greatly eroded, The grass downstream slope is heavily eroded, the dam surface is not flat.

1. Main dam:Embankment to create the upper slope side by 1.68 (T / m3) compacted soil, permeability coefficient K = 0,95. Length of dam L=176.5.0m, Elevation of dam crest TCS +40.8m, Dam structure is as follows: - Dam surface is 5.0m wide, reinforced with

concrete M300 thickness of 20cm- Upstream slope: Coefficient of slope m =

2.75, from elevation the dam crest 40.80m down to the elevation of +37.65m, it is reinforced with concrete slabs M300 poured in place with thickness of 12cm, From the elevation +37,65m m or less, reinforce with stone thickness of 25cm, the middle has a layer of macadam thickness of 10cm, the bottom is the filter cloth. Reinforced concrete frame M300, distance each way (5.0x5,0)m surrounded, the cut side binds around (bxh) = (20x35) cm.

- Downstream slope: from elevation of the dam crest to elevation + 36.70m, grass is planted in the plot (7´7). From the

Status of main dam

Status of spillway


Location Current status Construction works Pictures2. Spillway: - The form of spillway is the spillway with

large crest, overflow threshold elevation 38.15m, the structure spillway is soil, spillway length 50m. The bridge over the spillway has been damaged and downstream spillway has serious erosion.

3. Intake No.1:- Intake is length L = 24.0 m, bottom

elevation of upper culvert 36.19m, structure with concrete f40 sewer pipes, Concrete culvert forstrong water infiltration caused piles to peel many positions, the valve upstream of the dam is no longer available. The valve that opened and closed in the downstream tunnel was damaged. The joints are damaged, water leaks. 49 years of exploiting the intake is damaged

- Since the intake is too old, the loss of water at the two ends and the loss of water due to the sewer drain is broken and the damaged valve so the amount of water loss is very much.

4. Intake No.2: - Intake is length L = 24.0 m, bottom

elevation of upper culvert 36.82m, structure with concrete f40 sewer pipes, Concrete culvert forstrong water infiltration caused piles to peel many positions, the valve upstream of the dam is no longer available. The valve that opened and closed in the downstream tunnel was damaged. The joints are damaged, water leaks. 49 years of

elevation + 36.70m to the foot of the dam, reinforce with stone (thickness = 30cm), under the layer of macadam thickness of 15cm and coarse sand thickness of 15cm.


large crest, beyond is the water slope, energy dissipation by energy absorption tank. Flood discharge aperture B = 10m, spillway threshold elevation (+38.15)m, overflow threshold has M300 reinforced concrete structure, thickness of 30cm. Rear water slope are 20m long, Energy absorption tank of 10.0m long, 0.8m deep, 8.0m wide, structure of reinforced concrete bottom M300 with thickness of 30cm, side slope m = 1.5, reinforced concrete structure M300 has thickness of 20cm. Arrangement of civil bridges to people's houses with a width of 2.6m, reinforced concrete structure face plate M300 thickness of 15cm.

3. Intake dam No. 1: - Intake has D400mm aperture, elevation of

the intake bottom (+36.19) m, length of intake L = 24.6m, slope i = 0.001. thickness of 6mm outside of reinforced concrete M300 with a thickness of 25cm. Operator downstream of the culvert is sized (3.7x3.7) m, high 3.3m, the structure is made of brick only mortar M75 thick 22cm, reinforced concrete ceiling 200cm, thick 10cm. Arrange 2 closed valves, open the VC400 downstream.

4. Intake dam No. 2: - Intake has D400mm aperture, elevation of

Status of intake No.1

Status of intake No.2

Status of Management road


Location Current status Construction works Picturesexploiting the intake is damaged

- Because the sewer is too old, the phenomenon of dehydration occurs at both sides of the sluice gate and at the same time, the broken culvert also leads to dehydration, water valve is not tight.

- Since the intake is too old, the loss of water at the two ends and the loss of water due to the sewer drain is broken and the damaged valve so the amount of water loss is very much

5. Management road:- Length of 409.3m, starting point from

Ho Chi Minh trail, end point ends at the foot of the dam, some sections are very narrow and muddy, some sections of drainage canal run along along the road, causing serious erosion. Currently, motor vehicles cannot travel during the rainy season, therefore, the rescue of the dam faces many obstacles, putting the construction at risk when the dam breaks.

the intake bottom (+36.82)m, length of intake L=24.8m, slope i = 0.001. thickness of 6mm outside of reinforced concrete M300 with a thickness of 25cm. Operator downstream of the culvert is sized (3.7x3.7) m, high 3.3m, the structure is made of brick only mortar M75 thickness of 22cm, reinforced concrete ceiling 200cm, thick 10cm. Arrange 2 closed valves, open the VC400 downstream.

5. Management road: - Route: The length of the road is 409.3m,

Starting point from Ho Chi Minh trail, the end point ends at the foot of the dam. The width of the roadbed is 5.0m and the soil is compacted K = 0.95, the road surface is 3.5m wide, the structure of on-site concrete pouring M300 is thickness of 18cm, below the multi-macadam lining (4x6) cm is thickness of 15cm, compaction.

- Works built on the road: Intake: 02 intakes at positions K0+133.2; K0+251.5, aperture bxh = 1.0m x (1.0-1.5)m The intake structure is reinforced concrete M250 is thickness of 25cm, the bottom and walls are made of concrete M200 with thickness of (40 - 75) cm


Location Current status Construction works Pictures10. Tuan reservoir

1. Main dam- Dam is long 120.0m, higth 5,2m,

upstream slope m = 1.5, downstream slope m = 1.5, the dam surface is from 3.0 to 3.5 m wide, the original designed dam elevation is + 15.30m. According to the time under the effect of weather abraded the dam surface, the elevation of the average dam crest is + 15.0m. The dam body is thin, the upstream and downstream slope is very steep and not reinforced or protected should the erosion of the dam slope occur. Besides, the dam roof, which has not been reinforced, has been hit by a wave that caused local landslide. Currently the dam is seeped at the location between the dam body and the foundation at half of the right side dam.

2. Spillway: - Spillway is located in the right shoulder

of the dam, the spillway is 6m wide, has not been reinforced. spillway the structure is soil. spillway is located on strong weathered stone.

3. Intake:- The assembled round drain has aperture

D = 40cm, elevation of culvert bottom (+9.8) m. Over the years, the operation of the intake culvert has been seriously degraded: The entrance and exit doors of stone construction were damaged and peeled, The system of valves, work bridge and collapsible machine has been broken, valve door too old, not watertight, bring sewers to appear

1. Main damEmbankment to create the upper slope side by 1.69 (T / m3) compacted soil, permeability coefficient K = 0,95. Length of dam L=127.2m, Elevation of dam crest TCS +15.3m, Dam structure is as follows:- Dam surface is 5.0m wide, reinforced with

concrete M300 thickness of 20cm- Upstream slope: From elevation the dam

crest 15.30m down to the elevation of +12.80m, it is reinforced with concrete slabs M300 poured in place with thickness of 12cm, From the elevation +12.80m m or less, reinforce with stone thickness of 25cm, the middle has a layer of macadam thickness of 10cm, the bottom is the filter cloth. Reinforced concrete frame M300, girder size (25x35) cm.

- Downstream slope: from elevation of the dam crest to elevation + 11.70m, Plant grass for protection. From the elevation + 11.70m to the foot of the dam, reinforce with stone thickness of 30cm, under the layer of macadam thickness of 15cm and coarse sand thickness of 15cm.


large crest, Flood discharge aperture B = 8m, spillway threshold elevation (+13.20)m. Spillway threshold 8m wide, overflow threshold has M300 reinforced concrete structure, thickness of 40cm. Reinforcement of reinforced concrete beyond the threshold of a spillway 20.0m long, slope i = 0.1, width (8.0 -: - 5.0) m, structural bottom and roof with reinforced

Status of main dam

Status of spillway

Status of intake


Location Current status Construction works Picturesdownstream flow, The drain coupling is damaged water leak. Therefore, the ability to ensure safety for the dam is not guaranteed. Alternative measures to renew the sewer are required to ensure long-term, watertight and safe for the main dam.

4. Management road:- The length is 600.0m, the starting point

is from highway 7, the end point ends at the foot of the dam, some sections are very narrow and muddy. Currently, motor vehicles cannot move in the rainy season, so the rescue of the dam faces many obstacles, putting the construction at risk when the dam is broken.

concrete M300, bottom plate with thickness of 25cm, side roof with thickness of 25cm. Top elevation of slope + 13.20m, elevation of slope bottom position +12.0m.

3. Intake: - intake has D400mm aperture, elevation of

the intake bottom (+9.80) m, length of intake L = 31.8m, slope i = 0.001. thickness of 6mm outside of reinforced concrete M300 with a thickness of 25cm. Operator downstream of the culvert is sized (3.7x3.7) m, high 3.3m, the structure is made of brick only mortar M75 thicknees of 22cm, reinforced concrete ceiling 200cm, thick 10cm. Arrange 2 closed valves, open the VC400 downstream.

4. Management road:- The length of the road is 600m, the first

point is from National Road 7, the end point ends at the foot of the dam. The width of the roadbed is 5.0m and the soil is compacted K = 0.95, the road surface is 3.5m wide, the structure of on-site concrete pouring M300 is thickness of 18cm, below the multi-macadam lining (4x6) cm is thickness of 15cm, compaction.



Location Current status Construction works Pictures11. Hon

Mat reservoir

1. Main dam- Dam length 180m, high 12.6m, wide

dam surface (4.0 -:- 4.5) m, crest elevation according to the original design + 63.30m, because the project was built long under the effects of the weather has abraded the dam surface, at present the average elevation of the dam is: +62.20m to +62.40m, cross section at elevation of + 56.40m, width 12.0m. The upstream slope has been seriously damaged by waves, there are many positions that form palate. Downstream slope be planted grass, the downstream slope has some landslides, filter pressure downstream was damaged. width of dam is small, not enough design width. The dam is seepage along the length of the cross-section, downstream length L = 180m (seepage flow occurs at the dam muscle); Through assessment of geological documents, dam were leaked through layer 2, from elevation + 55.00m to elevation of + 56.20m along the length of the downstream dam structure, has permeability coefficient K=3.9´10-

4cm/s; It is necessary to take measures to treat seepage to ensure safety for dams and to prevent dehydration due to seepage.

2. Spillway: - located on the left side of the reservoir,

Aperture current spillway BT = 20m, threshold elevation (+60.50) m, The form of spillway is the spillway with large crest, Spillway structure by soil.

1. Main dam:- Embankment to create the upper slope side

by 1.68 (T / m3) compacted soil, permeability coefficient K = 3.5x10-6 cm/s, elevation of the dam crest + 63.30m; The 5m-wide dam face is reinforced with thickness of 20cm concrete grade. Length of dam L = 193m; breakwater height 0.7m, concrete structure M300.

- Upstream slope: Embankment to create the upper slope m = 3.0; Reinforcement of the upstream slope: from elevation the dam crest 62.60m down to the elevation of +59.50m, it is reinforced with concrete slabs M300 poured in place with thickness of 12cm; from elevation + 59.5m or less, it is reinforced by dry masonry with thickness of 25cm, macadam layer of 10cm, 1 layer of filter cloth. In the frame, it is structured by reinforced concrete M300 with the size of cross section of (0.25x0.35) m.

- Downstream slope: m = 2.75 (follow the old downstream slope), from dam surface to elevation +56.70m, grass is planted in in plot (7´7) m, the oblique shape drainage ditch have size (20x20)cm is structured by concrete of M200 with the thickness of 10cm of bottom slab. cross-over groove size (30x30) cm made of concrete M200 thickness of 12cm. At the elevation of + 56.7m the wide dam is arranged 9m. drainage works from the elevation + 56.7m to bottom of the dam made of anhydrous stone, thickness of 30cm, under is macadam thickness of 15cm and sand

Status of main dam

Status of Upstream slope

Status of spillway


Location Current status Construction works Picturesdownstream of flood spillway is strongly eroded due to flood. There is no bridge over flood spillway to serve people.

3. Intake:- The intake round drain has aperture D =


4. Management road: not yet built5. Management road:- The length of 650.0 m connects Ho Chi

Minh road to the upstream part of the reservoir, some sections are very narrow and muddy. Currently, motor vehicles cannot move in the rainy season, so the traveling of people is difficult.

have thickness of 15cm.2. Spillway: The form of spillway is the

spillway with large crest.- Elevation of Spillway + 31.20m, Spillway

width B = 20.8m, reinforced concrete structure M300 is thickness of 40cm.

- After 5m energy dissipative tank, is reinforced with the bottom and side slope of concrete M200 with thickness of 20cm.

- Energy absorption tank have a length of 7.0m, wide 20.8m, depth of 0.7m, structure of M300 reinforced concrete bottom thickness of 30cm. After 5m energy dissipative tank, is reinforced with the bottom and side slope of concrete M300 with thickness of 20cm.

- Building bridges over spillways, load design 0.5HL93, length L = 22.0m, including 2 spans, each span is 11.0m, structure of girder, girder size (b x h) = ( 34x100) cm, the width B = 4.2m, reinforced concrete structure M300. The surface of bridges elevation + 63.7m, the surface of bridges is made of reinforced concrete M300.High piers 2.4m reinforced concrete structure M300. High abutment 3.2m reinforced concrete structure M300.

3. Intake: - Intake form: Intake intake round, aperture

f60 cm.- The height of the bottom of the upstream

sewer: + 52.58m;- Elevation of downstream intake bottom: +

52.35m;- Intake length L = 77.25m, slope i = 0.004,

Structure of intake is steel pipe thickness

Status of intake



Location Current status Construction works Picturesof 6mm, circular intake with reinforced concrete pipe of M300. The ceiling and walls are thickness of 25cm on average, the average thickness of the bottom is 30cm. Arrange 2 closed valves, open the VC400 downstream. Operator downstream of the intake is sized (3.7x3.7) m, high 3.3m, the structure is made of brick only mortar M75 thickness of 22cm, reinforced concrete ceiling 200cm, thickness of 10cm.

4. Management road: - Route: Route length L = 650,0m, width Bn

= 5.0m; width of foundation bm = 3.5m. Surface of concrete M250 with thickness of18cm, under layer is macadam lining (4´6) with thickness of 15cm. The structure consists of 2 layers, macadam 4 × 6cm layer thickness of 15cm, upper layer of M300 concrete thickness of 18cm.

- Construction works on the route: Intake: 02 intakes at positions K0 + 228.3; K0 + 399.8, aperture bxh = 1.0m x(1.0-1.5) m The intake structure is reinforced concrete M250 is thickness of 25cm, the bottom and walls are made of concrete M200 with thickness of (40 - 75) cm.


accordance with the level IV house, with an area of 76m2 which is structured by mortar brick wall M75 with thickness of 22 cm, foundation of mortar M50 stone, slope floor is structured by reinforced concrete grade M200 which is covered by anti-hot tile.


Location Current status Construction works Pictures12. Rao

Bang reservoir

1. Main dam- Length 540m, height 6.0m; the original

designed dam elevation is + 11.50m. According to the time under the effect of weather abraded the dam surface, the elevation of the average dam crest is + 11.0m. upstream slope m = 2.5, downstream slope m = 2.0, dam face is wide 4.0 - 4.5m. embankment soil is heterogeneous and has many grains, the previous method of embankment dams is mainly manual so the water is seepage at 1/3 of the shoulder of the dam and dam body, and the right side of the dam is 245m long, seepage from elevation of + 6.1m to elevation + 7.6m through layer 1a with permeability coefficient K = K=5.5´10-4(cm/s). Stone protects the upstream slope is being damaged. The grass downstream slope has been greatly eroded, without drainage device, the dam surface is not flat.

2. Auxiliary dam:- length of 345m, height of 2.5m; The

initial designed dam elevation is + 11.50m, according to the time under the effect of abrasive rain and wind, the existing dam face have only average elevation of +11.0; upstream slope m = 1.5, downstream slope m = 1.5, wide dam surface from 3.0; Upstream and downstream slope has not been reinforced.

3. Spillway: - Located on the left side of the main dam,

the aperture spillway is: BT = 80m,

1. Main dam- Embankment to create the upper slope side

by 1.68 (T / m3) compacted soil, permeability coefficient K = 0,95. Length of dam L=550m, Elevation of dam crest TCS +11.50m, Dam structure is as follows:

- Dam surface is 5.0m wide, reinforced with M300 concrete thickness 20cm thick; 0.7m high seawall, M300 concrete structure.

- Upstream slope: Coefficient of slope m = 2.75, from elevation the dam crest 10.80m down to the elevation of +8.05m, it is reinforced with concrete slabs M300 poured in place with thickness of 12cm, From the elevation +37,65m m or less, reinforce with stone thickness of 25cm, the middle has a layer of macadam thickness of 10cm, the bottom is the filter cloth. Reinforced concrete frame M300, distance each way (5.0x5,0)m surrounded, the cut side binds around (bxh) = (20x35) cm.

- Downstream slope: m=2.5, from elevation the dam crest 10.80m down to the elevation of +8.05m, plant grass for protection. From the elevation + 8.05m to the foot of the dam, reinforce with stone thickness of 30cm, under the layer of macadam thickness of 20cm and coarse sand thicknees of 20cm.

2. Auxiliary dam:- Embankment to create the upper slope side

by 1.69 (T / m3) compacted soil, permeability coefficient K = 0,95. Length of dam L=348.2m, Elevation of dam crest TCS +11.50m, Dam structure is as

Status of main dam

Status of spillway

Status of intake


Location Current status Construction works Pictureselevation threshold (+8.05) m, about 200m long overflow form. spillway on strong weathered stone.

4. Intake:- The intake is circular, aperture D80cm,

structure with assembled concrete sewer pipes, has been badly damaged, there is no bridge to operate, Open valve system, valve is not watertight, drain connection is leaked so the possibility of dehydration is very large.

follows: - The 5m-wide dam face is reinforced with

thickness of 20cm concrete grade; breakwater height 0.7m, concrete structure M300.

- Upstream slope: m=2 reinforce with stone thickness of 25cm, the middle has a layer of macadam thickness of 10cm, the bottom is the filter cloth. Reinforced concrete frame M300, distance each way (5.0x5,0)m surrounded, the cut side binds around (bxh) = (20x35) cm.

- Downstream slope m=2. Plant grass for protection.

3. Spillway: The form of spillway is the spillway with large crest. Construction of Energy absorption tank after spillway.- Spillway width B = 83,0m.- The form of spillway is the spillway with

large crest, spillway threshold elevation + 8.05m (old spillway threshold elevation + 8.05m), M300 reinforced concrete structure with a thickness of 40cm.

- Energy absorption tank is 7.0m long, 0.5m deep, structure of reinforced concrete bottom M300 thickness of 30cm, elevation of energy absorption bottom + + 6.65m. Side walls are concrete gravity wall structure M200, wide bottom plate (1.9 -: - 2.8) m with a thickness of 60cm, high wall (2.5 -: - 4.85) m, top of wall wide 40cm.

- Reinforced after energy absorption tank with a length of 5.0m, structure of bottom and side of slope with reinforced concrete M300 with thickness of 15cm.


Location Current status Construction works Pictures- Building bridges over spillways, load

design 0.5HL93, length L = 84.4m, including 7 spans, each span is 12.0m, structure of girder, girder size (b x h) = ( 40x80) cm, the width B = 3.5m, Reinforced concrete structure M300, thickness of 20cm. Bridge abutment 2.8m high, bottom plate, thickness of 0.8m, reinforced concrete structure grade M300; high piers 2.45m, bottom plate size (3.6x2.0)m thickness of 0.8, reinforced concrete structure M300.

4. Intake: - The intake drains pressure water, designed

with D800 steel pipe, thickness of 6mm, outside coated M300 reinforced concrete, average thick bottom plate 30cm thickness of 30cm; intake length L = 30m. Elevation of the bottom of the intake + 6.04m, intake slope i = 0.001. Operator downstream of the intake is sized (3.7x3.7) m, high 3.3m, the structure is made of brick only mortar M75 thickness of 22cm, reinforced concrete ceiling M200, thickness of 10cm. Arrange 2 closed valves, open the VC800 downstream.


Location Current status Construction works Pictures13. Khe

Dua reservoir

1. Main dam- The dam has a length of about 310m,

small dam face B = (2.1-3.0) m, The original designed crest elevation is + 99.80m, Since the dam was built long under the effect of wind and rain, it caused abrasion of the dam crest, at present the elevation of the average dam + 99.20m, The upstream slope is not reinforced, so it is severely landslide, The downstream slope is not reinforced should cause erosion downstream due to seepage in the dam, causing instability at the foot of the downstream dam. The dam is seepage in the in location the dam body and the base of the length 58m old slot through layer 1a, the sand layer; left shoulder of 68m long through layer 1b with permeability coefficient =2.2´10-

4cm/s; These seepage layers are an average of thickness of 1.2cm.

2. Spillway: - Spillway with stone, trapezoidal cross

section, about wide 10m, The form of spillway is the spillway with large crest, slope water, Energy dissipative pit has been damaged badly, Both shoulders spill toward the mountain and earth dams without shoulder walls should be severely eroded.

3. Intake:- The aperture of intake 40, with

assembled concrete sewer pipes and connected downstream 1 section of 10m long with steel pipe, the assembled concrete sewer pipes were damaged, The

1. Main dam: - Length of dam L = 312.2m; Elevation of

wave break wall + 98.8m; Embankment to create the upper slope side. Dam structure is as follows:

- The 5m-wide dam face is reinforced with thickness of 20cm concrete grade; breakwater height 0.7m, concrete structure M300.

- Upstream slope: Coefficient of slope m = 2.75. From elevation the dam crest 99.10m down to the elevation of +97.10m, it is reinforced with concrete slabs M300 poured in place with thickness of 12cm; from elevation + 97.10m or less, it is reinforced by dry masonry with thickness of 25cm, macadam layer of 10cm, 1 layer of filter cloth. In the frame, it is structured by reinforced concrete M300 with the size of cross section of (0.25x0.35) m.

- Downstream slope: Coefficient of slope m = 2.5, from dam surface to elevation +93.0m, grass is planted in in plot (7´7) m, the oblique shape drainage ditch have size (20x20)cm is structured by concrete of M200 with the thickness of 10cm of bottom slab. From the elevation + 93.00m to the foot of the dam reinforced by stone slices thickness of 30cm, under the layer of macadam thickness of 15cm and coarse sand of ness thickness of 15cm.

2. Spillway: - Co-Ri-Ghe style Spillway form, the

threshold is high 3.2m; Energy absorption tank have a length of 7.0m, depth of 0.5m, structure of M300 reinforced concrete

Status of main dam

Status of spillway

Status of intake


Location Current status Construction works Picturesjoints of the drain have leaked causing water loss and unsafe for reservoir construction. The valve opened and closed downstream not watertight.

4. House under management: not yet built

5. Management road:- The management road is about 962.64m

long, the road surface is uneven, the width of road surface B = 3.0m. Therefore travel is difficult, especially in the rainy season.

bottom of thickness of 40cm. After 5m energy dissipative tank, is reinforced with the bottom and side slope of concrete M300 with thickness of 20cm.

3. Intake: - Intake length L = 53.55m, slope i = 0.017,

Structure of intake is steel pipe thickness of 6mm, circular intake with reinforced concrete pipe of M300. The ceiling and walls are thickness of 25cm on average, the average thickness of the bottom is 30cm. Arrange 2 closed valves, open the VC400 downstream. Operator downstream of the intake is sized (3.7x3.7) m, high 3.3m, the structure is made of brick only mortar M75 thickness of 22cm, reinforced concrete ceiling 200cm, thickness of 10cm.

4. Management road: - Route location: Long route L = 962.64m.

The starting point of the road connecting to the dam location, has a elevation of + 99.80m at position K0 + 13.71. The end point is connected to the inter-commune road, and about 1.5 km from the National Highway QL48.

structure and technical specifications: - The roadbed is 4.0m wide; road surface is

3.0m wide. Concrete surface M300 has thickness of 18cm, below is macadam layer thickness of 15cm. The slope of the road surface i = 2% and roadside i = 4% . Excavation locations on the road, towards the negative slope, arrangement of trapezoidal drainage trough with width of 0.4m, 0.3m deep.



Location Current status Construction works Pictures- Construction works on the route: Intake:

02 intakes at positions K0 + 250.3; K0 + 64.97, Structure: intake body with centrifugal concrete D100cm, thickness of 10cm, long 1.0m. The intake is made of concrete M200, stone 2x4cm, thickness of 30cm on the macadam foundation layer thickness of 10cm. Section of inlet and output sewer reinforced with stone and cement mortar M100.


accordance with the level IV house, with an area of 76m2 which is structured by mortar brick wall M75 with thickness of 22 cm, foundation of mortar M50 stone, slope floor is structured by reinforced concrete grade M200 which is covered by anti-hot tile.


Subproject

2.3. Summary of excavation volumn, construction materials and machinery

2.3.1. Summary of excavation volumn

54. Volumn of embankment and excavation soil of reservoirs is as follows:

Table 6: volumn of excavation soil

No. Name of works

Quantity (m3)

Excavation soil

Embankment soil Total

The volume of

soil excavated

The volume of excavated soil can be

utilized

Soil mining volume

1 La Nga 11,053 22,209 33,261 703 10,350 11,8592 Thanh thuy 18,034 23,344 41,377 1,052 16,982 6,3623 271 28,230 24,861 53,091 1,218 27,012 04 3/9 8,624 11,990 20,614 976 7,648 4,3425 Khe Dung 15,854 11,682 27,536 912 14,942 06 Hoc Nghet 16,368 25,834 42,202 998 15,370 10,4647 Don Hung 60,321 83,444 143,765 1,601 58,720 24,7248 Ke Sat 57,825 69,212 127,037 2,009 55,816 13,3969 Dap Tuan 3,429 6,642 10,071 508 2,921 3,72110 Khe Du 10,311 9,323 19,634 889 9,422 011 Hon Mat 27,423 34,288 61,711 1,208 26,215 8,07312 Rao Bang 22,319 22,890 45,208 1,207 21,112 1,77813 Khe Dua 16,272 18,386 34,658 901 15,371 3,015

Total 296.062 296,062 364,105 660,167 14,181 281,881Source: FS Report

2.3.2. Summary of volume of materials

55. The volume of sand, stone, cement, iron, steel and plastic ... is summarized in the table follow:

Table 7: Volume of construction materials

No. Name of works Unit Quantity1 La Nga Ton 16.488,162 Thanh thuy Ton 20.511,413 271 Ton 26.318,084 3/9 Ton 10.218,575 Khe Dung Ton 13.649,846 Hoc Nghet Ton 20.920,417 Don Hung Ton 71.266,48 Ke Sat Ton 62.974,279 Dap Tuan Ton 4.992,35810 Khe Du Ton 9.732,91211 Hon Mat Ton 30.591,0412 Rao Bang Ton 22.410,4313 Khe Dua Ton 17.180,68

Source: FS Report

56. Demand for fuel dissipative is mainly diesel, which is forecast in the table follow:

Table 8: Forecast of oil dissipative in construction activities at construction sites


No. Name of works Forecast of oil dissipativeDiesel liter liter /hours Kg/ hours

1 La Nga 5119.882 2.22 1.932 Thanh thuy 6369.175 2.76 2.413 271 8172.253 3.55 3.094 3/9 3173.057 1.38 1.256

Khe Dung 4238.529 1.84 1.6Hoc Nghet 6496.177 2.82 2.45

7 Don Hung 22129.54 4.8 4.188 Ke Sat 19554.68 4.24 3.699 Dap Tuan 1550.22 0.67 0.5910 Khe Du 3022.25 1.31 1.1411 Hon Mat 9499.088 4.12 3.5912 Rao Bang 6958.855 3.02 2.6313 Khe Dua 5334.921 2.32 2.01

Source: FS ReportNote: 1 working shift is 8 hours.

Oil density is:0.87 kg / liter (Source: Petrolimex, 1994).2.3.3. Mobilization of vehicles and machinery for construction

57. The number of vehicles and machinery mobilized to serve the subproject items depends on the construction progress of different items and the construction time on site. In order to meet the construction progress and to complete the volume of works, based on the terrain of the site, the nature of work and the sources of material supply, it is estimated to arrange the main equipment for embankment and dam construction like dump-truck 5T, dump-truck 7T, excavator 0.831.25m3, roller, tamper, diesel compressor 600m3/h, bulldozer 110CV, grader 110CV and excavator 1.6 m3

and equipment, machinery for road construction, management house and installation of monitoring systems including: material trucks, watering trucks 5m3, roller, tamper, bulldozer 110CV and spreader 130-140CV, concrete mixer (electrically operating 11kWh, battery), boat (if any). The details are in the table below:

Table 9: list of machines and equipment for construction of subproject works

No. Type of equipment Quantity Status1 Hand drill set 13 Has been registered

2 Crane 10 ton 13 Has been registered3 Crane 6 ton 13 Has been registered4 Tire crane 16 ton 13 Has been registered5 Tire crane 6 ton 13 Has been registered6 crawler crane 10 ton 13 Has been registered7 Table vibrator 1Kw 13 Has been registered8 Toad beams (portable soil dress 60kg) 13 Has been registered9 Rod vibrator 1.5 KW 13 Has been registered

10 Dittomat 13 Has been registered11 Machine cuts the MCD slot 13 Has been registered12 Flaxma steel cutting machine 13 Has been registered13 Bending machine 5.0Kw 13 Has been registered14 Cutting machine for cutting steel 5KW 13 Has been registered15 Saw machine 2.7KW 13 Has been registered16 Excavator 0.8m3 13 Has been registered


17 Wheeled roller 9 ton 13 Has been registered18 Welding machine 23 KW 13 Has been registered19 Electric welding machines 23kW 13 Has been registered20 Drill 4.5KW 13 Has been registered21 Drill YG60 13 Has been registered22 Roller machine 10 ton 13 Has been registered23 Roller machine 8.5 ton 13 Has been registered24 Rubber-tire roller 16 ton 13 Has been registered25 Vibrating roller machine 25 ton 13 Has been registered26 Internal-grinding machine 2.7KW 13 Has been registered27 Air compressor Diezel 1200m3/h 13 Has been registered28 Hammer drill VRM 13 Has been registered29 Contruction cranes 10Ton 13 Has been registered30 Contruction cranes 16Ton 13 Has been registered31 Rod vibrator 3.5KW 13 Has been registered32 Concrete pump 10 m3/h 13 Has been registered33 Concrete pump 50m3/h 13 Has been registered34 Grout pump 40KW 13 Has been registered35 brick breakers 13 Has been registered36 Excavator 1.25m3 13 Has been registered37 Welding machine 23KW 13 Has been registered38 Drilling machine 4.5KW 13 Has been registered39 Portable rock drill f42mm 13 Has been registered40 Drilling jumbo fl05 13 Has been registered41 Drilling jumbo f76mm 13 Has been registered42 Elevator hydraulic 13 Has been registered43 Air compressor 1200m3/h 13 Has been registered44 Air compressor 600m3/h 13 Has been registered45 Generator 500KVA 13 Has been registered46 Bulldozer ≤110Cv 13 Has been registered47 Bulldozer ≤ 140Cv 13 Has been registered48 Drag shovel 1.25m3 13 Has been registered49 Betonite Circulation Mixing Tank 750 lít 13 Has been registered50 Planer milling machine 7KW 13 Has been registered51 Asphalt pave finisher 50-60m3/h 13 Has been registered52 Lathe 10KW 13 Has been registered53 Concrete mixer truck 25m3 13 Has been registered54 mortar mixer 80l 13 Has been registered55 Bulldozer 110CV 13 Has been registered56 Building hoist 0,8Ton 13 Has been registered57 NI 030 13 Has been registered58 Truck 7Ton 52 Has been registered


59 Dump truck 7ton 39 Has been registered60 Dump truck 10ton 13 Has been registered61 Watering truck 5m3 13 Has been registered62 Dump truck 3,5Ton; 5Ton 26 Has been registered63 According to 020 13 Has been registered64 Building hoist 0,8Ton 13 Has been registered

Source: FS Report

2.3.4. Distance, transport route of materials:

Table 10: Distance, transport route of materials

Name of works Materials Distance Transported road

Don Hung reservoir

Brick, cement, sand, stone, iron

steel

The distance is about 11 km. From Yen Thanh district center to

Don Hung reservoir

Route: DT538, Tang Lang, Inter-communal road, Inter-

village road, Operation management road of the Don

Hung reservoir

Ke Sat reservoir


steel


Ke Sat reservoir

Route: DT538, Tang Lang, Inter-communal road, Inter-

village road, Operation management road of the Ke

Sat reservoir

Hon Mat reservoir


steel

The distance is about 16 km. From the center of Thai Hoa town

to Hon Mat reservoir

Route: DT545, QL15, Ho Chi Minh Road, Operation

management road of Hon Mat reservoir

Khe Dua reservoir


steel

The distance is about 12 km. From Thai Hoa town center to

Khe Dua reservoir

Route: QL48A, Inter-village road, Operation management

road of Khe Dua reservoir

Khe Du reservoir


steel

The distance is about 8 km. From Do Luong district center to Khe

Du reservoir

Route: QL7A, Inter-commune and inter-village roads,

Operation management road of Khe Du reservoir

Rao Bang reservoir


steel

The distance is about 7 km. From Nam Dan district center to Rao

Bang reservoir

Route: QL15, Inter-communal and inter-village roads,

Operation management road of Rao Bang reservoir

Tuan reservoirBrick, cement,

sand, stone, iron steel


Tuan reservoir

Route: DT538, QL7B, Inter-commune and inter-village

roads, Operation management road of Tuan reservoir

Hoc Nghet reservoir


steel

Cu ly transports about 9 km. From Quynh Luu district center to Hoc

Nghet reservoir

Route: QL48B, Inter-communal and inter-village

roads, Operation management road of Hoc Nghet reservoir

Thanh Thuy reservoir


steel

The distance is about 5 km. From Nam Dan district center to Thanh

Thuy reservoir

Route: QL45A, QL15, Inter-commune and inter-village

roads, Operation management road of Thanh Thuy reservoir

271 reservoirBrick, cement,


The distance is about 6 km. From Tan Ky district center to the 271

reservoir

Route: QL48E, QL15, Ho Chi Minh Road, Inter-village road, Operation management road of

271 reservoir


Name of works Materials Distance Transported road

3/9 reservoirBrick, cement,


The distance is about 6 km. From Tan Ky district center to 3/9

reservoir

Route: QL48E, QL15, Ho Chi Minh Road, Inter-village road, Operation management road of

the 3/9 reservoir

La Nga reservoir


steel

The distance is about 12 km. From Thanh Chuong district

center to the La Nga reservoir

Route: QL46A, Inter-communal and inter-village roads, the management and

operation road of the La Nga reservoir

Hồ Khe DungBrick, cement,


The distance is about 22 km. From Quynh Luu district center to

Khe Dung reservoir

Route: QL48E, QL1A, Inter-commune and inter-village

roads, Operation management road of Khe Dung reservoir

2.4. Auxiliary items

2.4.1. Electricity, water for construction and living

58. Due to the nature of the subproject building gravity water reservoirs, the electricity demand is negligible, mainly for lighting at night and steel formwork workshops. At present, the national power grid passes the construction areas, using electricity from the national grid near the subproject area. In addition, there are 110KVA backup generators in case of power outages

59. Pumps are used to intake water from the reservoirs to contain in the construction tanks at site. Depending on the quality of the reservoir water, Contractors will have treatment measures by the filtering tanks to ensure the water quality for domestic use and concrete construction.

2.4.2. Demand for workers’ houses and camps

60. The demand for workers to constructs each item in rush hour is about 60 personnel . However, mobilizing workers from other areas to the subproject area may affect local security and create social tensions in the local community. The contractor will register with the local community or hire local workers for manual work to avoid social stress. Workers will be required to follow the code of conduct. The number of local workers is estimated at 15-20% of the total number of workers to perform suitable jobs. Almost construction locations of subproject are favourable for gathering materials as well as arranging labor camp.

Table 11: Expected number of workers in construction sites

No. CategoriesNumber of

workers (persons)

Number of environmental and social supervisors

Estimate the number of local

workers1 La Nga 25 1 52 Thanh thuy 30 1 63 271 30 1 64 3/9 20 1 45 Khe Dung 25 1 56 Hoc Nghet 30 1 67 Don Hung 60 2 128 Ke Sat 55 2 119 Dap Tuan 15 1 3

10 Khe Du 15 1 311 Hon Mat 35 1 712 Rao Bang 30 1 613 Khe Dua 25 1 5


Source: FS Report

61. Most of construction sites are well located to gather materials as well as to build worker camps . However, since the condition of infrastructure for electricity and water supply is limited, the number of contractor workers concentrates on the peak time is about 15-20 people, mainly including managers and skilled workers, simple work items that directly hire local workers about 20-30 people on a construction these workers can go home after finishing work, construction time of each item is not long so some construction are expected to rent premises or houses of local people in each area of the subproject to build workers' houses, ensuring environmental hygiene and daily living conditions of workers like: toilets are equiped to meet the requirements of QCVN 01: 2011/BYT on the standard of hygienic toilet and the individual activities are carried out in the residential areas. At the material gathering yards are arranged right at the construction site and there are security guards taking turns.

2.4.3. Construction route

62. Advantages: Conditions of construction of works are relatively good, convenient transportation; At all construction sites, there is road to the reservoir, serving construction to meet the demand of material transportation during deployment in the locality. Inter-district and inter-commune roads and routes, QL1A, QL7A, QL7B, QL15A, DT545, QL48B, QL46A, DT545, DT 538 are reinforced, very convenient for transporting materials and ensuring traffic safety.

63. Difficulties: The roads for operation and management of the current Reservoirs are still earth roads, very muddy when rain occurs causing difficulties and dangers for transporting materials. Some main roads such as QL1A, QL7A, QL7B, QL15, QL48E, QL48B, QL46A, DT545, DT538, often have high traffic, so pay attention to ensuring traffic safety. (Pictures of managed routes are attached in section 2.2 of this report)

2.4.4. Landfill, Borrow pits

64. Borrow pits: Embankment soil will be reused from excavated soil, but there are many types of soil that do not meet the technical requirements. Therefore, the embankment soil is being exploited at the mines near the construction site with a distance of 150 m to 1.5 km from the construction site. The area of land mines is under the management of People's Committees of sub-project communes. The contractor has made necessary local agreements on the use of these mines.

65. Landfill: Excess land from construction works will be dumped at landfills near construction sites and landfills under the management of CPCs under the subproject. The project owner has made necessary agreements for the locality on the use of landfill locations.


Table 12: Borrow pits location

No. Name of the reservoir

Expected borrow pits location(The location of the soil pits has been confirmed and agreed with

the CPC)Transported road

1 La Nga The upstream of La Nga reservoir, the exploitation area is from the water edge to the hill of 60m, length 140m.

- Distance of 0.4 km- Transported road: Inter-village road, management road of La Nga reservoir.

2 Khe Du Downstream area of Dong Thau Dau in Hamlet 13, Tien Thanh commune. Exploiting area is 1ha, exploitation depth is 2.5m

- Distance of 2.25 km- Transported road: Inter-village road, management road of Khe Du reservoir.

3 TuanDong Troc Lop, Hamlet 13B, My Thanh Commune, Yen Thanh District, Nghe An Province, exploitation area of 1ha, exploitation depth of 2.5m

- Distance of 0.5 km- Transported road: Inter-village road, management road of Tuan reservoir.

4 Hon Mat Khe Sai soil pits, adjacent to Ho Chi Minh road, exploiting area of 1ha, exploitation depth of 2.5m

- Distance of 3.1 km- Transported road: Inter-village road, management road of Hon Mat reservoir.

5 271

Coinciding with the location of the 3/9 reservoir: Yard No. 1 and No. 2 yard are located at Dong Roi, belonging to Hamlet 1 and Hamlet 2, Thanh Tan, Ky Tan .. Yard 3 is located in Hamlet 5, Thanh Tan, Ky Tan

- Distance of 5.2 km- Transported road: Inter-village road, management road of 271 reservoir.

6 3/9

Coinciding with the location of the 271 reservoir: Yard No. 1 and No. 2 yard are located at Dong Roi, belonging to Hamlet 1 and Hamlet 2, Thanh Tan, Ky Tan .. Yard 3 is located in Hamlet 5, Thanh Tan, Ky Tan

- Distance of 4.3 km- Transported road: Inter-village road, management road of 3/9 reservoir.

7 Don HungIn Hon Don mountain - Ngoc Thanh hamlet - Hung Thanh commune (location adjacent to Don Hung dam. Exploiting area 3-4 ha, exploitation depth 2.5-3.5m).

- Distance of 2.3 km- Transported road: Inter-village road, management road of Don Hung reservoir.

8 Rao Bang At Khe Troi material yard in Nam Thanh commune, the exploitation area of 1 ha, total exploitation volume of 22,000m3

- Distance of 3.6 km- Transported road: Inter-village road, management road of Rao Bang reservoir.

9 Khe DuaAt the location of Production Forest, located in Hamlet 2 and Hamlet 3, Nghia Thuan Commune, Thai Hoa Town, Nghe An Province. Exploiting area is 1 ha, exploitation volume is 22,000m3

- Distance of 0.5 km- Transported road: Inter-village road, management road of Khe Dua reservoir.

10 Hoc Nghet Hong Rung Land mine, Villag8 , in Ngoc Son commune, the exploitation area of 1 ha, total exploitation volume of 22,000m3

- Distance of 5.3 km- Transported road: Inter-village road, management road of HocNghet reservoir.



Expected borrow pits location(The location of the soil pits has been confirmed and agreed with

the CPC)Transported road

11 Khe DungHamlet Dong Yen, Van Yen, Vu Vu, Hiep Hoa, Hoa Son commune, Do Luong district, Nghe An province. Exploiting area is 1 ha, depth is 2.0-3.5m

- Distance of 2.35 km- Transported road: Inter-village road, management road of Khe Dung reservoir.

12 Ke SatLocation beyond cultural house in Bac Tien hamlet, Tien Thanh commune, Yen Thanh, Nghe An. Exploiting area is 1 ha, exploitation volume is 22,000m3

- Distance of 2.2 km- Transported road: Inter-village road, management road of Ke Sat reservoir.

13 Thanh Thuy Khe Dia dam is located in village Ho Son, Van Dien communes. Exploiting area is 1-3 ha, exploitation depth is 2.5-3.5m.

- Distance of 1.5 km- Transported road: Inter-village road, management road of Thanh Thuy reservoir.

Table 13: Landfill location


Disposal volume

(m3)Expected landfill location

Transported road

1 La Nga 2,503 Landfill Vung Tro Nay, Ngoc Son commune, Thanh Chuong district, Nghe An province

- Distance of 1.0 km- Transported road: Inter-village road, management road of La Nga reservoir.

2 Khe Du 889 Below Khe Ho dam body, Van Yen hamlet, Hoa Son commune, Do Luong district, Nghe An province

- Distance of 0.75 km- Transported road: Inter-village road, management road of Khe Du reservoir.

3 Tuan 508 Dong Den, Hamlet 13B, My Thanh Commune, Yen Thanh District, Nghe An Province.

- Distance of 1.1 km- Transported road: Inter-village road, management road of Tuan reservoir.

4 Hon Mat 2,408Landfill coordinates: 19°12'43.99 "N; 105°26'35.91" E. Landfill location is Unused land, managed by Nghia Loc CPC. Status is bare land. Waste yard area 1,500 m2, reserve of 3000 m3

- Distance of 200m- Transported road: Inter-village road, management road of Hon Mat reservoir.

5 271 1,218Landfill No. 1 is located at hamlet 5, Tan Son, Ky Tan commune; Landfill No.2 is located at hamlet 1, Tan Son, Ky Tan. Sharing waste dumps with 3/9 reservoir.

- Distance of 4.15 km- Transported road: Inter-village road, management road of 271 reservoir.

6 3/9 976Landfill No. 1 is located at hamlet 5, Tan Son, Ky Tan commune; Landfill No.2 is located at hamlet 1, Tan Son, Ky Tan. Sharing waste dumps with 271 reservoir

- Distance of 0.85 km- Transported road: Inter-village road, management road of 3/9 reservoir.

7 Don Hung 5,210 At the location of Dong Bau in Hung Thanh commune (Location planning for rural market), downstream of the dam.

- Distance of 3.2 km- Transported road: Inter-village road,



Disposal volume

(m3)Expected landfill location

Transported road

management road of Don Hung reservoir.

8 Rao Bang 1,477 At the position of Bai Tru in the area of Nam Thanh commune, Nghia Dan, Nghe An

- Distance of 3.6 km- Transported road: Inter-village road, management road of Rao Bang reservoir.

9 Khe Dua 1,351 Landfill in Nghia Hoa commune, Thai Hoa town, Nghe An province

- Distance of 3.3 km- Transported road: Inter-village road, management road of Khe Dua reservoir.

10 Hoc Nghet 2,498 Opposite People's Committee of Ngoc Son commune, Quynh Luu district, Nghe An province

- Distance of 3.2 km- Transported road: Inter-village road, management road of HocNghet reservoir.

11 Khe Dung 912Landfill coordinates: 19°14'34.16"N; 105°35'9.32"E. Landfill location is Unused land, managed by Quynh Thang CPC. Status is bare land. Waste yard area 1,000 m2, reserve of 2000 m3

- Distance of 0.2 km- Transported road: Inter-village road, management road of Khe Dung reservoir.

12 Ke Sat 3,959 At the foot of the dam downstream, Tan Yen A village, Tien Thanh commune, Yen Thanh district, Nghe An province.

- Distance of 0.7 km- Transported road: Inter-village road, management road of Ke Sat reservoir.

13 Thanh Thuy 1,952 Behind Nam Dan District People's Committee, Nghe An province

- Distance of 5.2 km- Transported road: Inter-village road, management road of Thanh Thuy reservoir.


2.5. Material transportation plan

66. Construction materials will be transported to site about 1 week before the starting of the construction. Construction materials will be transported to construction sites at certain periods of time to avoid negative impacts on agricultural activities and the daily life of local people. Workers, machines and materials are estimated in the above sections;

2.6. Pre-construction activities

67. Prior to the construction, there are some works like surveying topography, hydrology, meteorological conditions, geological drilling, land acquisition marking, UXO clearance. In the subproject scope there is no demolition of structure but there are trees and crops of affected households have to clearing, thes work will be carried out by the owners themself . Waste from vegetation clearing will be collected and transported to the communal dump sites by affected households.

68. Designing the Subproject to provide the options that take into account scenarios, risks of climate change on the performance of the construction items of the Subproject. The study on the climate factor change is presented in the section: the recent status of the subproject area, as a basis for selecting optimal design options. The recent impact of climate change in the region is mainly relating to the precipitation that results in floods, landslides and droughts.

2.7. Operational and maintenance activities

69. Periodic dam safety monitoring: Once the reservoirs have been filled with water and the dams started working, the dam-owners are responsible for the dam safety monitoring. This assignment is carried out by qualified independent experts who did not participate in the investigation, survey, design, construction or operation of the dams. After the dams regularly operate, the monitoring stages are kept periodically, including the safety inspections prior and after flood seasons every year in accordance with the Government Decree No. 114/2018/ND-CP on dam safety management.

70. Upon completion of the works, the operation of the dams will be the responsibility of the dam owners and the responsibility of the PPMU will end.

71. The reservoir and valve operation procedure: A dam-owner must develop a reservoir water regulation procedure to regulate the storage and discharge of water in normal and emergency conditions of dam and reservoir to submit to authorized state management agency for approval and organize the implementation of the process. The dam owners must prepare and submit documents on operational procedure of valves and each work (hereafter referred to as operation of works) to the authorities for promulgation according to their competence. Other operations should be addressed pursuant to the Government's Decree No.114/2018/ND-CP on dam safety management.

2.8. Dam safety plan

72. A dam safety report (DSR) will be prepared for the Subproject. The objectives of the DSR are to present, analyse and make recommendations on: a) all conditions that may affect the safety of the dams and its associated facilities; b) impacts of the dam or substructure breaking or unable to work due to harsh natural conditions, human errors or structural faults; and c) the institutional framework (at the present time and in the future) necessary to avoid or minimize adverse conditions for the safety of the dams.

73. After the completion of the review at the subproject screening stage, the CPMU of MARD should provide a DSR for each subproject which is identified during the project implementation stage and sent to the international dam safety (PoE) and the World Bank for review. The report must include findings and recommendations for any related safety issues and necessary actions to be taken. The dam safety measures should be integrated into the design, construction and operation of the reservoirs.

74. Review and analysis of the dam structure: The review and evaluation of the dams and related works will include, but is not limited to, the following:

- Review of the geological documents and material sources, with the attention to potential adverse effects that may occur by the predictable geological features. Assessment of


unforeseen conditions and counter measures to address the safety and operation of the dams and the works.

- Assessment of the suitability of the types of dams and spillways, the response of the dam design. They include the proposed measures for soil treatment, excavation, load characteristics of selected substrate, permeability and pressure exertion control measures. The safety point of view for any abnormalities or omissions and measures to be taken will be paid attention to.

- Assessment of the stability, strength analysis and safety factors in normal conditions, abnormal and extreme load conditions for soil dams and concrete dams, spillway structure and drainage works, including the determination of geological impact criteria.

- Consideration of the factors of like reservoir stability, landslide formation, waves, and wave effects on dam stability;

- Consideration of the hydrological calculation method that determines the design flood of the project, reservoirs and spillway size; review of the designs of the spillways, e.g. the flow conditions and the tilling basins; assessment of the discharge capacity of the spillways corresponding to all design flood indicators that dams will not be damaged.

- Considerations for the water intake and discharge works, including hydraulic designs, emergency dewatering capacity and sedimentation process in the reservoirs.

- Assessment of the design of the spillways and out-door controls, including the selection of the number and types of outlets and valves, lifting equipment and other controlling mechanisms. Particular attention should be given to back-up systems to operate spillways which have gates and draining facilities in the event of operational and power failure.

- Review of the design of the flow diversion works, construction progress, hydrology and the risk factors associated with the flow diversion during the flow construction and filling process at the beginning stage of the reservoir water accumulation.

- Consideration of the suitability of the instrumentation, especially those instruments or markers which are required in the prediction of serious hazards or dam breakage.

- Consideration of the operation and maintenance procedures and the emergency response plan of the dam owners, including the assessment of sub-project operation and maintenance factors relating to dam safety and operators’ capacity assessment to be able to perform the maintenance and inspections of the safety of the dams.

75. Review and assessment of dam safety risks: In addition to ensuring the dam's structure safety, the project will assess potential risks of the dams to the population and the environment in downstreams, including the related works. Dam breakage may not occur but if it happens, consequences will be serious. Regarding this content, during the project preparation, as part of the DSR or environmental and social management plan, the subProject Owners should conduct assessing potential risks to the downstream residents. For large dams with potential high-risks, it need to acquire comprehensive data during the preparation process, including topographic survey and downstream land use to simulate a downstream dam and flood breakdown under different conditions/scenarios to serve the preparation of the emergency response plans. Collecting data from upstream dams and/or watershed activities may also be necessary for some dams. Planning and implementing capacity building programs for the subprojects with pilot activities to promote active participation of local communities should be considered. Communities around the dams can participate in day-to-day monitoring to protect the dams from external destructors and they can join in simple maintenance tasks. A community participatory model in dam safety activities should be considered. Sedimentation and contamination of upstream water may be a serious problem for some river basins. The dam owners must commit to allocate funds for appropriate dam operation and management and to periodically survey dam safety.

2.9. Subproject implementation schedule

76. The implementation subproject duration is from 2018 to 2022.

77. For large reservoirs (Don Hung reservoir and Ke Sat reservoir) conduct construction of the entire works in 24 months, The remaining small reservoirs will carry out the entire works in 12 months.


a. Construction of Don Hung reservoirs and Ke Sat reservoir:

78. Based on the Plan the PMU has reported to the Provincial People's Committee the implementation time from 2018-2020. Details are as follows:

Table 14: Progress of subproject implementation for Don Hung reservoirs and Ke Sat reservoir

Work2018 2019 2020

3 4 1 2 3 4 1 2 3 4Investment preparation workCompensation and clearanceOrganizing bidders for construction of key worksConstruction of key worksThe bidder builds the sewer section for water intake

Construction of intakeorganizing construction bidding: house under management and management roadExecution of construction repair items for house under management and management roadsCompleting and handing over subproject to exploitation and use

Source: Demonstration of the investment project

b. Construction of reservoir: Hon Mat, Khe Dua, Khe Du, Rao Bang, Tuan, Hoc Nghet, Thanh Thuy, 271, 3/9, La Nga, Khe Dung:

79. Based on the Plan the PMU has reported to the Provincial People's Committee the implementation time from 2018-2020. Details are as follows:

Table 15: Progress of subproject implementation for reservoir: Hon Mat, Khe Dua, Khe Du, Rao Bang, Tuan, Hoc Nghet, Thanh Thuy, 271, 3/9, La Nga, Khe Dung

Work2018 2019

3 4 1 2 3 4Investment preparation workCompensation and clearanceOrganizing bidders for construction of key worksConstruction of key worksThe bidder builds the sewer section for water intakeConstruction of intakeorganizing construction bidding: house under management and management roadExecution of construction repair items for house under management and management roadsCompleting and handing over subproject to exploitation and use

Source: Demonstration of the investment project


2.10. Cost of implementation

80. Total investment capital demand is 256,806,007,000 VND.

Table 16: Cost of implementation

Cost item Value Unit- Construction costs 187,567,013,000 VND- Project management costs 2,959,793,000 VND- Cost of construction investment consultancy 27,874,518,000 VND

- Other costs 10,304,035,000 VND- Clearance compensation 5,466,705,000 VND- Preventive 28,100,648,000 VND

- Total project capital 256,806,007,000 VNDSource: Demonstration of the investment project


CHAPTER 3: LEGAL, ADMINISTRATIVE AND POLICY FRAMEWORK

3.1. Government Regulation

a. Laws

Law on Environmental Protection No.55/2014/QH13 promulgated by the National Assembly of Vietnam on 23/06/2014 and effective since July 2015. This Law provides the regulations on environmental protection activities, policies, measures, resources, rights, obligations and responsibilities of agencies, organizations, households and individuals in the environmental protection.

Land Law No.45/2013/QH13 approved by the National Assembly of Vietnam on November 29, 2013, regulating the land ownership regime, powers and responsibilities of the State which is the representative of the land ownership of the whole people and unifies the management and use regime of land, rights and obligations of land-users in respect of land within the territory of the Socialist Republic of Vietnam.

Law on Natural Disaster Prevention No.33/2013/QH13 approved by the National Assembly of Vietnam on June 19, 2013, regulating the natural disaster prevention and control, rights and obligations of agencies, organizations and household, individuals participating in the natural disaster prevention and control, state management and resources to ensure the prevention and control of natural calamities.

Law on Water Resources No.17/2012/QH13 promulgated by the National Assembly of Vietnam on 21 June 2012 on management, protection, exploitation and use of water resources, prevention and mitigation of damages caused by water in the territory of the Socialist Republic of Vietnam.

Law on Biological Diversity No.20/2008/QH12 promulgated by the National Assembly of Vietnam on 13 November 2008 on conservation and sustainable development of biodiversity, rights and obligations of organizations, households and individuals in the conservation and sustainable development of biodiversity.

Law on Construction No.50/2014/QH13 promulgated by National Assembly, Session VII, on June 18, 2014;

Law on Road Traffic No.23/2008/QH12 promulgated on 13/11/2008;

Law on Complaint No.02/2011/QH13 promulgated on 11/11/2011;

Law on Cultural Heritage No.10/VBHN-VPQH promulgated on 23/07/2013;

Law on Labor Safety and Health No.84/2015/QH13 promulgated on 25/06/2015;

Law on Dykes No.79/2006/QH11 promulgated on November 29, 2006;

Law on Irrigation No.08/2017/QH14 was approved by the National Assembly on 19/06/2017;

Law on Plant Protection and Quarantine No.41/2013/QH13 promulgated on 25/11/2013.

Law on Forest 16/2017 / QH14 promulgated by the National Assembly on 11/15/2017

b. Decrees

Decree No.38/2015/ND-CP dated 24/04/2015 promulgated by the Government on waste management and waste material;

Decree No.18/2015/ND-CP dated 14/02/2015 promulgated by the Government on environmental protection planning, strategic environmental assessment, environmental impact assessment and environmental protection plan;

Decree No.44/2014/ND-CP dated May 15, 2014 of the Government on land prices.

Decree No.47/2014/ND-CP dated May 15, 2014 of the Government providing for compensation, support and resettlement when the State recovers land;

Decree No.155/2016/ND-CP dated 18/11/2016 of the Government, providing for the sanctioning of administrative violations in the field of environmental protection.


Decree No.25/2013/ND-CP dated March 29, 2013 of the Government on environmental protection charges for wastewater;

Decree No.67/2012/ND-CP of the Government, amending and supplementing a number of articles of the Government's Decree No.143/2003/ND-CP of November 28, 2003, detailing the implementation of Article of the Ordinance on the exploitation and protection of irrigation works;

Decree No.113/2010/ND-CP dated 03/12/2010 of the Government on the determination of damage to the environment;

Decree No.112/2008/ND-CP dated October 20, 2008 promulgated by the Government on management, protection and integrated exploitation of natural resources and environment of hydropower and reservoirs;

Decree No.120/2008/ND-CP dated 01/12/2008 of the Government on river basin management;

Decree No.114/2018/ND-CP dated 04/09/2018 of the Government on the management of dam safety.

c. Circulars

Circular No.27/2015/TT-BTNMT dated 19/05/2015 of the Ministry of Natural Resources and Environment on strategic environmental assessment, environmental impact assessment and environmental protection plan.

Circular No.36/2014/TT-BTNMT dated 30/06/2014 of the Ministry of Natural Resources and Environment, detailing methods of land valuation; building and adjusting the land price table, specific land prices and land pricing consultancy.

Circular No.37/2014/TT-BTNMT dated 30/06/2014 of the Ministry of Natural Resources and Environment, providing detailed regulations on compensation, support and resettlement when the State recovers land.

Circular No.30/2014/TT-BTNMT on land allocation, land lease, change of land use purpose, land acquisition.

Circular No.36/2015/TT-BTNMT dated 30/06/2015 of the Ministry of Natural Resources and Environment on the management of hazardous waste.

Circular No.22/2010/TT-BXD of the Ministry of Construction on labor safety in construction of works.

Circular No.19/2011/BYT-TT dated 06/06/2011 of the Ministry of Health, guiding the management of labor hygiene, health of workers and occupational diseases.

Circular No.13/2007/TT-BXD dated 31/12/2007, guiding a number of articles of Government's Decree No.59/2007/ND-CP dated April 9, 2007 on solid waste management.

Circular No.34/2010/TT-BCT dated 07 October 2010 of the Ministry of Industry and Trade, regulating the dam safety management of hydropower projects.

d. Decisions

Decision No.52/2012/QD-TTg dated 16/11/2012 of the Prime Minister on the policy to support job creation and vocational training for laborers whose agricultural land is acquired.

Decision No.3733/2002/QD-BYT dated 10/10/2002, issuing 21 labor sanitation standards, 05 principles and 07 labor sanitation criteria.

Government Directive in Document No.21/CT-TTg dated 14 October 2013 on strengthening the management of reservoir safety.

Decision No. 1858 / QD-TTg dated November 2, 2015 of the Prime Minister on approving the list of "dam rehabilitation and safety improvement (WB8) funded by the World Bank (WB);

Decision No. 4638 / QD-NN-HDQT dated November 9, 2015 of the Minister of Agriculture and Rural Development approving the feasibility study report of the project "dam rehabilitation and safety improvement" (WB8) funded by the World Bank;


http://boxaydung.vn/web/guest/home/-/legal/2pBh/vi_VN/18/21771/37

http://boxaydung.vn/web/guest/home/-/legal/2pBh/vi_VN/18/21771/37

Decision No. 5492 / QD-BNN-HTQT dated December 30, 2015 of the Ministry of Agriculture and Rural Development Approving the Dam Safety Framework of the project "dam rehabilitation and safety improvement" (WB8) funded by the World Bank;

Decision No. 5095 / QD-BNN-HTQT dated December 6, 2016 of the Ministry of Agriculture and Rural Development on approving the adjustment of the Manual of the project "dam rehabilitation and safety improvement" (WB8) funded by the World Bank attached with Decision No. 2793 / QD-BNN-HTQT dated July 6, 2016 of the Ministry of Agriculture and Rural Development

e. Applicable standards

QCVN 01: 2009/BYT: National technical regulation on drinking water quality.

QCVN 02: 2009/BYT: National technical regulation on domestic water quality.

QCVN 08-MT: 2015/BTNMT: National technical regulation on surface water quality;

QCVN 09-MT 2015/BTNMT: National technical regulation on groundwater quality.

QCVN 14: 2008/BTNMT: National technical regulation on domestic wastewater.

QCVN 40: 2011/BTNMT: National technical regulation on industrial wastewater quality.

QCVN 39: 2011/BTNMT: National technical regulation on water quality for irrigation.

QCVN 38: 2011/BTNMT: National technical regulation on surface water quality to protect aquatic life.

QCVN 03-MT: 2015/BTNTM: National technical regulation on limit of some heavy metals in soil.

QCVN 15: 2008/BTNMT: National technical regulation on pesticide residues in the soil.

QCVN 43: 2012/BTNMT: National technical regulation on sediment quality.

QCVN 05:2013/BTNMT: National technical regulation on Ambient Air Quality.

QCVN 06: 2009/BTNMT: National technical regulation on hazardous substances in ambient air.

QCVN 26: 2010/BTNMT: National technical regulation on noise.

QCVN 27: 2010/BTNMT: National technical regulation on vibration.

QCVN 07: 2009/BTNM: National technical regulation on hazardous waste thresholds.

QCVN 18: 2014/BXD: National technical regulation on construction safety

QCVN 04 - 05:2012/BNNPTNT: National technical regulation on hydraulic structures – The basic stipulation for design.

f. Legal documents provided by Project Owner

Decision No. 1858 / QD-TTg dated November 2, 2015 of the Prime Minister on approving the list the project "dam rehabilitation and safety improvement" (WB8) funded by the World Bank (WB);

Decision No.4638/QD-BNN-HTQT dated 09/11/2015 of MARD on "Approval of Feasibility Study Report of World Bank-funded Dam Rehabilitation and Safety Improvement Project -WB8";

Resolution 01/2016 / NQ-HDND dated March 31, 2016 of the Provincial People's Council on the policy of implementing the re-lending mechanism of the Dam Safety Improvement and Improvement Project (WB8), Nghe An Province

Decision No. 5492 / QD-BNN-HTQT dated December 30, 2015 of the Ministry of Agriculture and Rural Development Approving the Dam Safety Framework, dam rehabilitation and safety improvement (WB8) funded by the World Bank.

Pursuant to the agreement No. 5749 - VN for the project "Repair and improve dam safety" signed between the Government of the Socialist Republic of Vietnam and the International Development Association on April 8, 2016.

Document No. 7402 / BNN-TCTL dated September 1, 2016 of the Ministry of Agriculture and


Rural Development on unifying the list of reservoirs under the Dam Safety Repair and Improvement Project (WB8), province Nghe An

Pursuant to the Decision No. 794 / QD - SNN dated 6/12/2016 of the Department of Agriculture and Rural Development on the establishment of the Project Management Board "Repair and improvement of dam safety (WB8), Nghe An province”

Decision No. 3348 / QD - BNN - TCTL dated 10/8/2017 of the Ministry of Agriculture and Rural Development approving the implementation plan in 2017 The project of repairing and improving dam safety funded by the World Bank.

g. Compliance to the environmental and social impact assessment

81. The Subproject‘s environmental and social impact assessment will be carried out in accordance with the World Bank and the Government‘s environmental assessment procedures. In particular, it will be subject to the environmental and social management framework (ESMF) of the project that the WB reviewed and approved. Social and environmental screening will be conducted for each subproject to determine the appropriate size and type of the environmental assessment. Based on that, TOR will be prepared for environmental and social impact assessments in accordance with the subproject scope and the potential impacts anticipated arising from the subproject implementation. Environmental and social screening will be conducted by World Bank safeguard policy experts. The TOR for the environmental and social impact assessments will also be reviewed and approved by the World Bank Safeguard Policy Specialists prior to the implementation of the environmental and social impact assessments. In the process of the environmental and social impact assessment, consultations with affected people and local NGOs should be conducted. ESIA will be publicly disclosed at the subproject sites accessible to locallyaffcted peoples and local NGOs in Vietnamese language the English version will be disclosed on the WB’s external website.

3.2. The World Bank’s safeguard policies

82. The objective of these policies is to prevent and minimize impacts to people and natural environment in the development process. The safeguard policies provide basis for stakeholders’ participation in the project designs and act as an important tool for building ownership among local people.

83. The effectiveness and development of the WB’s projects and programs has been increasing significantly as a result of attention to these policies. The World Bank's safeguard policies are available on the website at http://web.worldbank.org, where the environmental protection policies are published.

3.2.1. Project level

84. The Project’s environmental and social screening has been implemented in accordance with OP 4.01 and indicated that the World Bank's Safeguard Policies on Environmental Assessment (OP/BP 4.01), Natural Habitats (OP/BP 4.04), Indigenous Peoples (OP/BOP 4.10), Involuntary Resettlement (OP/BP 4.12), Safety of Dams (4.37), Projects on International Waterways (OP/BP 7.50) and Pest Management (OP 4.09) will be applied to this Project. According to the screening, the Project is classified as Category A. In addition, it needs to comply with the World Bank's requirements for community consultation and dissemination.

3.2.2. Subproject level

85. The subproject will only upgrade the dam on the existing reservoirs, has been screened for the environment and society and determined that: the subproject does not cause major impacts on the environment and society of the project implementation area. Relevant World Bank policies for the subproject include:

Environmental safeguard policies

- OP/BP 4.01 Environmental assessment

- OP 4.09 Pest Management

- OP/BP 4.37 Safety of Dams


Social safeguard policies

- OP/BP 4.12 Involuntary resettlement

OP/BP 4.01 Environmental Assessment

86. This policy is going throughout the process of identifying, preventing and mitigating environmental and social potential negative impacts associated with the World Bank 's lending activities. In the work of the World Bank, the purpose of the environmental assessment is to improve decision making, ensure that the project options are being reviewed and sustainable and that the community to be likely affected must be consulted. The Borrower is responsible for environmental assessment (EA) and the World Bank advises the Borrower at their request. The borrowing projects are proposed in four categories, depending on locations, sensitivity, scales of the projects, nature and extent of potential environmental impacts, including A, B, C and FI.

87. This Subproject activates OP 4.01 as it relates to the construction and operation that will have social environment potential negative impacts. Based on the results of the environmental screening, the Subproject is classified B in terms of environment. As defined in OP 4.01 and the Government’s environmental assessment regulations, this ESIA is prepared for the Subproject to meet the requirements of the Government’s regulations and the World Bank’s safeguard policies. Upon appraisal, the ESIA of this Subproject will be publicly disclosed to the local people in the project area to ensure that affected people and local NGOs can access it easily and it will be disclosed through the World Bank website.

OP/BP 4.09 Pest management

88. The purpose of the pest management policy is to minimize and manage environmental and health risks associated with the use of pesticides, to promote and support safe, effective and environmentally-friendly pest management. The purchase of pesticides in a WB-financed project must be assessed for the nature and extent of risks involved, taking into account the proposed and intended use. For pest management affecting one of the two sectors of agriculture or public health, WB supports a strategy to promote the use of biological control methods and reduce reliance synthetic chemical pesticides. In Bank-financed projects, the borrower addresses pest management issues in the context of the project's environmental assessment. In appraising a project that will involve pest management, the Bank will assess the capacity of the country's regulatory framework and institutions to promote and support safe, effective, and environmentally sound pest management. This subproject triggers the policy because of the use of pesticides in termite treatment in dam bodies. The implementation of the subproject does not increase the capacity of the reservoir, do not increase the irrigated area downstream and do not affect the crop structure in the subproject area. However, the repair of the intake has been damaged and the phenomenon of water loss will be overcome to ensure more stable irrigation water regulation. The repair of damaged sewers and the loss of water will be overcome to ensure more stable irrigation water regulation and will provide adequate irrigation water for the subproject area in the drought season, recover the initial volume and irrigation area of the reservoir. At that time, the cultivation of agricultural crops for areas that lack water in the drought season will be restored, on the other hand, when there is enough irrigation water, it can lead to changes in some cultivars and planting areas. Therefore, it will increase the amount of pesticide and fertilizer in the restored area and increase the pest in the subproject area. On the other hand, the use of chemicals to kill termites in the dam body, if not well managed, also affects the surrounding environment due to residues and disposal not in the right places or overflowing rainwater attach termite chemicals. Therefore, the subproject needs to activate OP 4.09 Pest Management.

OP/BP 4.37 Safety of Dams

89. This policy is triggered for the whole project because of the safe operation of dams related to the socio-economic development and environment. When borrowing from the World Bank for construction of new dams, a borrower must propose a dam safety policy based on opinions of experienced and responsible experts in charge of design and construction supervision and that borrower, by way of the dam safety measures, will implement them throughout the project cycle. This policy also applies to the rehabilitation and improvement of existing dams, which affect the performance of a project. In this case, the dam safety assessment should be undertaken and additional dam safety measures should be proposed. OP 4.37 recommends that, in an appropriate circumstance,


WB staff will discuss necessary measures with clients to strengthen institutional, legal and regulatory framework for dam safety programs.

OP/BP 4.12 Involuntary resettlement

90. The Involuntary Resettlement Policy is to address long-term difficulties, poverty and environmental impacts on affected people during a resettlement process. OP 4.12 applies to regardless of whether an affected person is relocated or not. The WB describes all processes and results of "involuntary resettlement" or simply resettlement, even when affected people are not required to relocate. The resettlement is involuntary when the Government has the right to requisition of land or other assets, and when the affected people have no choice to maintain their current livelihood.

91. This policy is applied because this subproject causes temporary or permanent impacts on involuntary land acquisition, and loss of land-related architectures and assets for construction of the subproject. In particular, the subproject permanently acquires 4,672.26 m2 of agricultural land of 5 households and 2 organizations are CPCs. At the same time, the sub-project will temporarily recover 75,000 m2 of public land of 12 organizations which are CPCs under the subproject. The results showed that no households had to relocate.

92. Resettlement plan of this subproject is prepared and submitted to WB for approval. The Provincial People's Committee (PPC) will then approve the Resettlement Plan and all compensation, support and resettlement activities must be completed before commencement of construction.WBG EHS Guidelines

93. The Environment, Health and Safety Guideline (EHS) by a World Bank Group (WBG)/International Finance Corporation (IFC) was introduced in 2008. This is an important guideline on environmental, health and safety protection in industrial development and other projects. It set out the goals to be achieved and measures to be taken to deliver the best results at reasonable costs. This Guideline can be found at the website http://www.ifc.org.

World Bank’s policy on Access to Information

94. In addition to the environmental safeguard policies to promote the transparency and the accountability, WB issued the Information Access Policy relating to proposed safeguard measures. It sets out the policy to support borrowers’ decision-making by allowing them accessing information relating to social and environmental aspects of such projects at the website in native language, which is easy to understand and intuitive. The WB ensures that relevant environmental and social protection documents related to such projects as well as the preparation procedures related to subprojects are introduced timely prior to the appraisal. The World Bank’s information access policy requires disclosure of information in both English and Vietnamese languages and meets the World Bank’s standards.

Table 17: Summary of environmental assessment process of WB & Government

The stages in the

environmental assessment

process

environmental assessment process (WB (OP/BP 4.01 on Environmental

Assessment)

Vietnam(Decree No. 18/2015/ND-CP,

Circular No.27/2015/TTBTNMT)

Screening List of categories (A, B, C, FI)It is not mandatory for each specific case to classify, apply safety policy and determine environmental assessment tool (EA).The World Bank will classify a proposed project into one of four categories including A, B, C, or FI depending on type, location, sensitivity and scale of the project

Categories: I, II, III and IV of Decree No. 18/2015/ND-CP.Rules, regulations in Appendix I, II and III - List of projects requiring submission of SEA and EIA report for approval.All projects are not listed.Generally, the Project Owners classify their projects based on the classification as stated in


and the nature, the importance of its potential environmental impacts.Type A: Requirement for full environmental impact assessment. In some cases, the social and environment management framework is required, too.Type B: ESIA, social and environment management framework or social and environment management plan is required. In most cases, social and environment management framework and/or social and environment management plan are required.Type C: no EA action.Type FI: social and environment management framework is the most common tool. In the case of a number of sub-projects that have been identified before the appraisal, the FI will prepare specific tools based on the frameworks, e.g. the ESIA or social and environment management plan.

Decree No.18/2015/ND-CP and consulted with the Department of Natural Resources and Environment (DONRE) or Vietnam Environment Administration (DONRE). VEA) to categorize and require EA report such as: Projects fall into Appendixes: I, II, III: SEA or EIA are required Projects fall into Appendix IV: no EIA and EPP are required Projects fall into Appendixes: I, II, III and IV: EPP is required.

Environmental assessment tool

Depending on the project impacts, a range of tools are used to meet the World Bank's requirements, including: environmental and social management framework; specific environmental assessment; environmental and social management plan; regional and sectoral EA; risk or hazard assessment; Environmental audit. The World Bank provides general guidelines for implementing each tool.

The EA tools like SEA, EIA or EPP are identified based on Appendixes: I, II, III and IV of Decree No.18/2015/ND-CP.

Scope of environmental

assessment

The World Bank helps the borrower to draft the TOR for EA and to determine the EA scope, procedures, timetable and outline of a EA report.A A-type project require ESIA TOR and the determination of scope and consultation will be necessary to prepare the TOR for environmental assessment report.

- TOR for EA is not required.- Normally, after consultation with

the local DoNRE or the Environmental Department (VEA) about the type of EA, Project Owner will prepare an EA report.

Community consultation

During the EA, the Borrower must consult with affected groups and local NGOs on the environmental aspects of the project and focus their views.For a A-type project, the Borrower shall consult these groups at least

- Project owner is responsible for consulting with the People's Committee of the commune, ward or township (hereinafter referred to as the commune) where project is being implemented, consulting


twice: (a) immediately after the environmental inspection and before the EA TOR completion; and (b) once a draft EA report has been prepared. In addition, the Borrower will consult with these groups throughout the project implementation process as needed to address issues related to EA that affect them. For a B-type project, there should be at least one community consultation meeting.For meaningful consultations, the Borrower provides relevant project documents in a timely manner prior to the consultation in a form and language that the group can understand and be accessible to.The minutes of the public meeting are included in the report.

with with organizations or communities directly affected by project; Research and receive objective opinions and requests from relevant agencies to minimize project negative impacts on the natural environment, biodiversity and public health.

- Commune People's Committees where a project is implemented and organized and directly affects will be consulted. Project owner is responsible for submitting the EIA report to the commune-level people's committees where the project is implemented and organized and directly affects, together with a written request for comment. Within 15 working days from the date on which a EIA report is received, the commune-level people's committees and organizations under the direct impact of the project are obliged to submit their responses if they do not approve the project.- The community consultation is

carried out in the form of community meetings co-chaired by the Project Owner and the commune people's committees where the project is implemented together with the participation of the community like Vietnam Fatherland Front, socio-political organizations, socio-professional organizations, population quarters, villages/hamlets. All opinions of participants in the meetings must be fully and truthfully presented in the minutes of the meeting.

Public information

Before the World Bank conducts a project appraisal, EA report must be made public in a way that is easily accessible to project-affected groups and local NGOs. When the World Bank officially receives report, the World Bank will publish the report in English to the public via its website.

After EIA report is approved, the Project Owner is responsible for preparing, approving and publicly displaying EMP at the local Commune People's Committee office, in consultation with the community for people’s information, inspection,


monitoring. (Article 16 of Decree No.18/2015/ND-CP).

Independent environmental

specialist

For a A-type project, the Borrower retains independent EA specialist who have no contact with the project to implement EA.For a high-risk A-type project or a project with multi-dimensional environmental concerns, the Borrower will also hire a consultative group of independent environmental specialists with international qualifications to advise on the project aspects relating to EA.Specialists/consultancy companies will be selected through bidding under the close supervision of the World Bank.

This content is not regulated in Vietnamese policy.The Project Owner shall implement or hire a consulting unit which satisfies the conditions specified in Clause 1, Article 13 of Decree No.18/2015 to make EIA report. Project Owner or consultancy companies must fully meet the following conditions: (i) Staff responsible for EIA must have at least BA degree and EIA consultancy certificate; (ii) specialized staff involved in the project must have university or higher degrees; (iii) have laboratory and testing equipment certified for measuring, sampling, processing and analyzing environmental samples for the environmental impact assessment of the project; In the absence of a laboratory, the calibration equipment must meets the requirements and there must be contract with qualified unit.

EA review/approval

process

The WB reviews EA's findings and recommendations to determine if it provides sufficient grounds for the Bank to process the project. When Borrower has completed all or parts of the environmental assessment before the Bank participates in a project, the Bank will consider the environmental assessment to ensure its consistency with this policy. The Bank may, where appropriate, request additional environmental assessments, including public consultation and disclosure.

The Ministry of Natural Resources and Environment appraise and approve EIA reports of the projects specified in Appendix III to this Decree, excluding the projects relating to defense and security contents. - The Ministries or the ministeriallevel agencies shall appraise and approve EIA reports on projects under their competence for investment approval, except for projects listed in Appendix III to this Decree.The Provincial People's Committees conduct appraisal and approval of EIA reports for projects in their provinces, except the projects mentioned above;The appraisal will take place at least 45 working days at the MoNRE level and 30 working days at the DoNRE level and 5 working days at the district level after receipt of full Environmental


Impact Assessment or full EPP.The number

and language of the EA/EIA to be evaluated

Number of copies are not specified.Language requirements: English and Vietnamese. EA reports in Vietnamese are required for domestic disclosure and must be in English for publication on the World Bank’s website.

Project Owner must submit at least 07 environmental impact assessment reports (depending on number of appraisal committee members) and 01 feasibility study or technical report of a proposed project

Content of EA report

For a A-type project, the content of a EA report is in line with Appendix B of OP4.01.The EA scope for a B-type project may vary depending on each project, but the EA's scope is narrower than that of a A-type project. An environmental and social management plan is an integral part of an EA type A (regardless of other tools to be used). EA for a B-type project may also be an environmental and social management plan with the content set out in Appendix C of OP 4.01.

The content of a EA report must be in line with Circular No.27/2015/TT-BTNMT.

Monitoring EA During the project implementation, the World Bank will supervise the implementation of the environmental aspects on the basis of environmental regulations and the Borrower arranges reports of the agreement in the Loan Agreement and in other project documents to determine if the compliance of the Borrower's Environmental Procedures (mainly with EMP) is satisfactory. If the compliance is not satisfactory, the World Bank will discuss with the Borrower to ensure the compliance, if necessary.

The local DoNRE is entrusted monitoring the environmental compliance of the projects.At the end of the project construction phases, the Environmental Management Agency will coordinate with the Construction Management Agency to monitor the compliance of the environmental management activities stated in the EAs.


CHAPTER 4: NATURAL, SOCIO-ECONOMIC CONDITIONS AND ENVIRONMENTAL STATUS

4.1. Natural conditions

4.1.1. Geographical and geological conditions

95. Nghe An is located at latitude 180 33' to 200 01' North latitude, longitude 1030 52' đến 1050 48' East longitude, in the center of the North Central region. Nghe An is a province located in the center of the North Central region.

- The North borders on Thanh Hoa province,

- The South borders on Ha Tinh province,

- The West borders on Lao People's Democratic Republic,

- The East borders East Sea.

96. Nghe An Province with 419 km of land border line; the East coast length is 82 km. This position gives Nghe An an important role in the North-South economic and social exchange, building and developing marine economy, foreign economy and expanding international cooperation. Nghe An is located on the North-South national highway (91 km long highway running through districts: Quynh Luu, Dien Chau, Nghi Loc, Hung Nguyen districts, Hoang Mai town and Vinh city. Ho Chi Minh road runs parallel with National Highway 1A with a length of 132 km passing through districts: Quynh Luu, Nghia Dan, Tan Ky, Anh Son, Thanh Chuong and Thai Hoa town, Highway 15 in the west length 149 km running along the province); National highways run from the East to the West, connecting to Laos through the border gates (QL7 is length 225 km, QL46 is length 90 km, QL48 is over length 160 km). The province has a North-South railway length of 94 km:

Figure 2: Geographical location of Nghe An province

97. Located in the Northeast of Truong Son range, Nghe An has a diverse and complex terrain, strongly divided by mountains and rivers and streams. In general, the terrain is tilted in the direction of


Northwest - Southeast, with three distinct ecological regions: mountainous, midland, coastal plain. In particular, mountainous areas account for 83% of the territory. With the topography as a steep slope, land with a slope greater than 8% accounts for nearly 80% of the natural area of the province, especially over 38% of the land area with a slope greater than 25%. The highest place is Pulaileng peak (2,711m) in Ky Son district, the lowest is the plain of Quynh Luu, Dien Chau, Yen Thanh and Hoang Mai towns where only 0.2 m above the sea level (Quynh Thanh commune, Quynh Luu). This topographic feature is a major obstacle for the development of road transport network, especially in the midland and mountainous roads, making it difficult to develop forestry and protect the land from erosion, causing flooding in many areas of the province. However, the system of rivers with high slopes, with 117 large and small waterfalls, is a great potential that can be exploited to develop hydropower and regulate water sources for production and people's life.

98. The terrain of construction works has two quite clear terrain types: low mountainous terrain to medium high mountains and accumulation terrain:

- Low mountainous terrain to medium high mountains: This type of terrain covers both sides of the reservoir, mainly distributed in the Southeast, Northeast and Northwest of the construction area, this type of terrain occupies the area is quite large, including hills and dome-shaped mountains, extending to benefit areas, natural elevations in the reservoir area, changing from elevation + 61.7m to + 50.5m.

- Agglomerated terrain: distributed mainly in the lower part of the South and Southwestern dams including streams and narrow plains in front of mountains, this is also the main cultivation area of the people in the region project, with elevation from + 48.0m to + 50.0m.

99. The geomorphology of the area is characterized by low hills and mountains mixed with narrow plains, with 2-side hillsides with relatively low slopes, this is the result of a process of erosion, accumulation, both vertically and cross-over on a relatively homogeneous geology, no geological stratification. The erosion process thrives along the main stream systems in the region. Sediment layers, the results of the original weathering process usually have quite a large thickness. Agglomerated topographic forms are sedimentation products, concentrated in the downstream of the dam.

100. Subproject: Repairing and upgrading are to ensure safety for reservoirs of La Nga, Thanh Thuy, reservoir 271, Don Hung, Khe Du, Hoc Nghet, Khe Dung, Ke Sat, reservoir 3/9, Ho Tuan, Hon Mat, Rao Bang and Khe Dua in Nghe An province under the project of dam rehabilitation and safety improvement, WB8 is located in 12 communes, 8 districts of Nghe An province.

4.1.1.1. 271 Reservoir and 3/9 reservoir

a. Geographical location, topography, geomorphology

101. Ky Tan commune is a midland commune of Tan Ky district, 90km from Vinh city in the North-West direction, limited by:

- North border on Giai Xuan commune

- South and Southwest borders on Tan An commune

- The East borders on Tan Long commune

- The West borders on Dong Van commune

102. Key works: Reservoirs of water 271 and 3/9 are coordinates about 19005’ North longitude and 105030’ East longitude. The construction basin is 1.8 km2 (271 reservoir) and 2.2km2 (reservoir 3/9) is mainly steep mountains, high-density forests.

103. Irrigation area is a cultivated land spread over Ky Tan commune, Tan Ky district. In general, the irrigation area is a relatively flat land area in a favorable direction for the construction of the canal system with gravity flowing.

b. Geological conditions

104. Study the geological characteristics of the area of reservoir 271 and reservoir 3/9, through the results of the general survey / geological survey along the earth dam route, the flood discharge spillway shows that the geological strata and geological features are as follows::




- Layer 1: embankment soil layer, basalt soil form and pebbles.

- Layer 2: A clay soil layer with hard plastic state.

- Layer 3: The clay layer is weathered and cracked, with lots of grits, not yet determined the thickness.

- Dong Trau stratified system is described with Triassic age anii in Vinh sheet (E-48-X). The stratified system is divided into 2 sub-layers:

+ Stratified system: Dong Trau below (T2adt1).

+ Stratified system: Dong Trau on (T2adt2).

4.1.1.2. Don Hung Reservoir


- Don Hung Reservoir: There are geographical locations: North latitude: 19° 4'55.52"N; East longitude: 105°27'8.08"E

105. In terms of topography, Yen Thanh district is like a basin, the north, the west and the south are mountains and low hills, in the middle and the east are the lowlands adjacent to Dien Chau district; with a length of nearly 40 km from North to South, nearly 35 km wide from east to west. Crest Vang Tam with a height of 544m, is the highest mountain in the district located in the north of Lang Thanh commune.

106. The project area is located in the transition zone between hills and plains of Nghe An province, the common feature is that there are low hills and mountains, with gradual slopes to the east, terrain elevation changes within +24.0m to + 50.0m, is a region with strong development of industrial crops, forest trees and animal husbandry.


107. According to the field survey data and laboratory laboratory data, the stratigraphic layer in Don Hung Reservoir area consists of the following soil and stone layers:

- Layer 1c: embankment soil layer: Clay mixed with gritty particles is yellow-gray, blue-gray, red-brown, white-gray, plastic state, hard to half hard, has flexible position soft. This layer has a thickness of 0.7m (HK12) to 12.9m (HK8) in survey boreholes. The composition of embankment is mainly clay mixed with lots of grits, there are some locations that are clay.

- Layer 1 Old embankment soil: Gritty clay mixed with yellowish gray, blue gray, reddish brown, white gray, state hard to half hard, soft plastic. This layer has permeability.

- Layer 1a: Clay, silty clay in the reservoir: This is the top layer, only distributed in the reservoir. The layer is formed by sedimentation process of clay materials, sand ... forming a clay mud layer at the bottom of the reservoir.

- Layer 1b: Cultivated land, embankment land: This layer is mainly distributed at the foot of the main dyke line. The main component is multi-state clay mixed with plant humus, of thinkness 0,5m.

- Layer 2: Clay mixed with grit, blue gray, yellow gray, greenish gray, soft plastic, this layer is encountered in drilling holes HK7, HK8, HK9, thickness varies from 0.4 to 3.1m. The composition is mixed with clay with lots of grits, blue gray, yellow gray, green gray.

- Layer 2a: mixed sand mixed with medium grain sand mixed with grit, yellow gray, blue gray, plastic state, this layer is encountered in drilling hole HK9, thickness is 0.9m. Composition is mixed sand mixed with medium grain sand mixed with grit, yellow gray, blue gray.

- Layer 3a: Clay mixed with gravel, reddish-brown, yellow-gray, gray-green, hard plastic, this layer is under layer 1, the layer has a wide distribution throughout the survey area. This layer has a thickness of varying from 0.6m (HK3) to 1.8m (HK1) in survey boreholes. Main components are clay mixed with gravel, red brown, yellow gray, blue gray.

- Layer 3b: Clay mixed with many colors such as gray green, gray yellow, white gray, sometimes mixed with lots of grits and hard, this layer lies under layers 2, 2a, 3a, the layer has


a wide distribution throughout the survey area. This class is encountered in drilling holes HK6, HK8, HK9, HK12 with thickness varying from 3.7m to 5.7m. Main components are patchy color silt with blue-gray, yellow-gray, gray-white, ometimes mixed with lots.

- Layer 3c: variegated colored clay with blue-gray, yellow-gray, gray-white, double-spaced, hard-plastic, this layer is under layer 3b, encountered in drilling hole HK6 with 0.8m thickness. The main component is yellow-gray sand.

- Layer 4a: Clay mixed with crushed macadam, patchy color reddish-brown, yellow-gray, gray-white, hard to half-hard, this layer is under layer 3a, 3b has a wide distribution area throughout the survey area. in most boreholes with thickness varying from 0.5m (HK4) to 7.2m (HK5). Main components are clay mixed with lots of grits, variegated colors reddish-brown, yellow-gray, white-gray.

- Layer 4b: Strong weathered shale into clay mixed with lots of grits, yellow gray, patchy reddish-brown, gray-brown, gray-green, pink-gray. This layer lies under layer 4a, the layer has a relatively wide distribution area in the survey area with a thickness of varying from 0.7m (HK5) to 2.4m (HK13). The main components are strong weathered schist into clay mixed with lots of grits, yellow gray, patchy reddish-brown, gray-brown, gray-green, pink-gray.

- Layer 5: Slate weathered, cracked to moderate, blue-gray, gray-brown and brown, yellow-gray, medium-hard streaks. This layer is under layer 4b, the layer has a relatively wide distribution area in the survey area. The composition is mainly schist, weathered, cracked to strong, blue-gray, gray-brown, yellow-gray streaks.

4.1.1.3. Hoc Nghet Reservoir


108. Hoc Nghet reservoir in Ngoc Son commune, Quynh Luu district is a commune in the semi-mountainous area of Quynh Luu district, located on the axis of 48B Nghia Dan - Cau Giat street, 9 km from Cau Giat town to the South-West. limited by:

- The East borders Quynh My commune

- The West borders Quynh Chau commune

- The South borders Dien Lam commune, Dien Chau district

- The North borders on Quynh Tan commune

109. Reservoir area: The Reservoir is the lowest + 18.00m, around the Reservoir, the terrain can hold water at the elevation of + 30.00m, the Reservoir runs along the Northeast direction.

110. Irrigation area: varying altitude from + 12.00m, to + 6.00m, total agricultural land area of the whole commune is 540 ha, the irrigation area runs along the Southwest direction.

111. There are 2 big slits in the commune: Khe Sai and Khe Gang intersect between the commune and also the center of Khe Gang reservoir area and upstream of Thai river in Quynh Lam commune.


112. According to the field survey data and laboratory laboratory data, the stratigraphic layer in Hoc Nghet Reservoir area consists of the following soil and stone layers:

- Layer D: Land for embankment dams, mixed clay, clay and grit, gray-brown, reddish brown. The soil condition is slightly moist, semi-hard, Medium tight texture.

- Layer D1: Land for embankment dams: Light clayey soil, mixed with gray, brown and dark gray. Moisture-proof, hard soil state. Medium tight structure.

- Layer 1: Medium-grained sand with gray brown, dark gray color. Plastic state, medium tight structure.

- Layer 2: Clay with little grit in blue-gray, white gray. A slightly moist, semi-hard soil state. Medium tight structure.

- Layer 3: Clay mixed with yellow gray macadam. The soil condition is slightly moist, semi-


hard, medium-tight.

- Layer 4: Convergence sandstone is strongly weathered, drill core into slam form and many lumps. Soil slightly moist, hard state.

- Layer 5: Siltstone sandstone is gray-brown, blue-gray, thin layered structure, less rigid, the drill core has ingot shape 5-10cm.

4.1.1.4. Ke Sat Reservoir


113. Ke Sat Reservoir: There are geographical locations: North latitude: 19° 6'12.21"N; East longitude: 105°28'30.80"E

114. In terms of topography, Yen Thanh district is like a basin, the north, the west and the south are mountains and low hills, in the middle and the east are the lowlands adjacent to Dien Chau district; with a length of nearly 40 km from north to south, nearly 35 km wide from east to west. Golden Peak with a height of 544m, is the highest mountain in the district located in the north of Lang Thanh commune.

115. The project area is located in the transition zone between hills and plains of NgheAn province, the common feature is that there are low hills and mountains, with gradual slopes to the east, terrain elevation changes within +24.0m to + 50.0m, is a region with strong development of industrial crops, forest trees and animal husbandry


116. According to the field survey data and laboratory laboratory data, the stratigraphic layer in Ke Sat Reservoir area consists of the following soil and stone layers:

- Layer 1c: embankment soil layer - Mixed clay loam gray yellow, blue gray, red brown, white gray, state hard to half hard. Clay mixed with grit is yellowish-gray, blue-gray, red-brown, white-gray, the state is hard and hard, half flexible and soft. This layer has a thickness of 2.5m (KS2-1) to 10.8m (KS6) in the survey boreholes. The composition of embankment is mainly clay mixed with lots of grits, there are some locations that are clay.

- Layer 1 Old embankment soil: Gritty clay mixed with yellowish gray, blue gray, reddish brown, white gray, state hard to half hard, soft plastic. This layer has permeability

- Layer 1a: Clay, silty clay in the reservoir: This is the top layer, only distributed in the reservoir. The layer is formed by sedimentation process of clay materials, sand ... forming a clay mud layer at the bottom of the reservoir.

- Layer 2: Clay mixed with macadam, patchy color reddish brown, yellow brown, white gray, hard plastic state - half hard. This layer is distributed under the dam in the dam site in most boreholes, thickness varies from 1.7m (KS1) to 5.8m (KS3-1) in the survey boreholes. Composition of clay mixed with lots of grits, patchy color reddish brown, yellowish brown, white gray

- Lens layer TK1: Dark gray clay, soft plastic state. This layer is sandwiched in layer 2, encountered in the drilling hole KS6, 0.6m thick, the composition is dark gray clay.

- Layer 3: Shale is strongly weathered into clay mixed with lots of grits, yellow gray, dark gray, hard state. This layer lies below layer 2 and lies on the original rock surface, widely distributed throughout the survey area. The composition of the layer is strongly weathered schist into clay mixed with lots of grits, yellow gray, patchy reddish-brown, gray-brown, gray-green, pink-gray, half hard to hard. In the soil still retains the fissile structure of parent rock, weathered stone remains soft and broken by hand.

- Layer: Slate weathered, cracked and strong. This layer is located below layer 3, distributed at the bottom of the dam foundation and survey area, encountered in most boreholes. The composition of the layer is weathered cracked medium to strong, gray-green, gray-green, gray gold

4.1.1.5. Khe Du Reservoir



117. Khe Du reservoir in Hoa Son commune is a semi-mountainous commune of Do Luong district, 50km from Vinh city in the North-West direction limited by:

- The North borders Dai Thanh commune;

- The South borders Thai Son commune;

- The East borders on My Thanh commune;

- West: border with Thinh Son commune

118. Key works: Khe Du reservoir is located at about 19005’ North latitude and 105030’ East longitude. The construction basin is 1.2 km2, mainly mountains and mountains.

119. Irrigation area is a cultivated area spread across Hoa Son commune, Do Luong district. In general, the irrigation area is a relatively flat land area in a favorable direction for the construction of the canal system with gravity flowing.


120. According to the field survey data and laboratory laboratory data, the stratigraphic layer in Khe Du Reservoir area consists of the following soil and stone layers:



- Layer 1: Clay mixed with blue gray, dark gray. State Soft, moist plastic. Poor texture.

- Layer 2a: Clay-brown and clay-brown soil. A slightly moist, semi-hard soil state. Medium tight structure.

- Layer 2: A clay soil with little grit in gray-yellow, red-brown color. A slightly moist, semi-hard soil state. Medium tight structure.

- Layer 3: Siltstone claystone is yellow, brown, white, with a thin layer, less firm. The drill bit has a structure of grits, lump and slam.

4.1.1.6. Khe Dua Reservoir


121. Khe Dua reservoir, geographic location: North latitude: 19°15'55.70"N; East longitude: 105°31'4.37" E; About 11 km from the center of Thai Hoa town along QL48 to the East and Southeast. Reservoir Khe Pin in Nghia Thuan commune has the contiguous position follow:

- The East and Northeast bordering hills and mountains of Quynh Luu district.

- The North borders Nghia Hoi commune, Nghia Dan district.

- The West: border with Tay Hieu commune.

- The South borders Nghia Loc commune, Nghia Dan district

122. Nghia Thuan is a commune east of Thai Hoa town, very rare agricultural land accounts for only 18% of the total natural land area and this area is mainly located downstream of the Khe Dua reservoir. The land elevation has a gradual slope from Northeast to Southwest. In general, the terrain is quite complicated because there are many alternating creeks and hills. In order to have favorable conditions in production, every citizen must make more efforts in re-renovating the fields and at the same time, rationally shifting the structure of crops. There are so after the construction project: Repair and upgrading of Khe Dua reservoir to promote all effectiveness.


123. According to the field survey data and laboratory laboratory data, the stratigraphic layer in Khe Dua Reservoir area consists of the following soil and stone layers:








4.1.1.7. La Nga Reservoir


124. La Nga Reservoir, has a geographical position: Northern latitude: 18°46'14.05 "N; East Longitude: 105°24'3.29" E; the Reservoir belongs to Ngoc Son commune, thanh Chuong district.

125. Irrigation area is a cultivated land spread over Ngoc Son commune, Thanh Chuong district. In general, the irrigation area is a relatively flat land area in a favorable direction for the construction of the canal system with gravity flowing


126. According to the field survey data and laboratory laboratory data, the stratigraphic layer in La Nga Reservoir area consists of the following soil and stone layers:







4.1.1.8. Rao Bang Reservoir


127. 127. Nam Thanh commune is located in the West - North of Nam Dan district, 25 km away from Vinh city in the Southeast direction, limited by :

- The North borders Dai Hue mountain range

- The South borders Van Dien commune

- The East borders on Nam Anh commune

- The West borders on Nam Nghia commune

128. Key works: A confluence of Da Han and Suối Cam slots with coordinates of 18046'15 "North latitude and 105024'50" East longitude. Khe Da Han originates from the 100m-high Dai Hue mountain range in the Northeast, and the catchment area of the stream up to the dam construction site is 16.5 km2, mainly steep mountains and planted forests.

129. Irrigation area is a cultivated area, generally the irrigated area is divided by many hills and


streams, with uneven terrain, gradually sloping from the dam to the end of the irrigation area and convenient for irrigation self flowing.

130. The topography of the construction area is in the midland region in the North of Nam Dan district, the natural elevation of the reservoir area is within +5.00 to + 10.00m. The lake runs in the south-northwest direction the terrain elevation gradually increases from the south to the northwest. The west of the lake is surrounded by high-altitude hills and mountains from +10.00 to +15.00 m, the slope is comfortable. In the east of the lake, there are hills with medium slope. To the south of the lake are villages and productive land, natural elevation from +8.00 to + 10.00m.

131. Regional geomorphology is characterized by low hills mixed with narrow plains, with flat gentle hillsides, this is the result of a process of erosion, accumulation, strong development in both dimensions. vertical and cross-over across a relatively homogeneous geological background, not layered. The erosion process thrives along the main stream systems in the region. The ruins of the ruins and products of the original weathering process often have quite a large thickness.

132. Agglomerated topographic forms are alluvial products mainly concentrated in the reservoir and downstream of the dam


133. According to the field survey data and laboratory laboratory data, the stratigraphic layer in Rao Bang Reservoir area consists of the following soil and stone layers:

- Layer: The clayey soil is heavy to clay and macadam in yellow gray, reddish brown, white gray. The state is half hard, hard, medium-tight. Origin: old dam land

- Layer 1a: Clayey soil alternating sand with permeability.

- Layer 2: Light gray gray clay. Soft plastic state to hard plastic, medium tight structure, less tight sections. Origin: sediment (aQ).

- Layer 3: Light clayey soil interbeds with sand, sand mixed with many gray-brown gravel. Status saturated, medium tight structure. Origin: sediment (aQ).

- Layer 4: Sand mixed with gravel and pebble with little dark gray brown, reddish brown. Status saturated, medium tight structure. Origin: sediment (aQ).

- Layer 5: Clay and less gritty luster, color gray, yellow gray, reddish brown and white gray. The half-hard state, tight texture just came tight. Origin of sediment + lasterite.

- Layer 5a: Mixes of lasterite macadam and rocky clay to form brown-brown, reddish-brown laterite.

- Layer 6: Heavy clayey soil, white gray. Half hard, medium-tight structure. Origin: sediment (aQ).

- Layer 7: Heavy clayey soil and many reddish brown shavings. The half-hard state is hard, medium-tight. Origin of ruins (deQ).

- Layer 8: The fine sandstone is completely weathered in yellow gray, white gray and reddish brown. The rock has a strong, cracked structure, cracks are filled with clay and secondary minerals. Drill bits with clay-like form contain gritty particles and un-weathered stone flakes, soft.

- Layer 9: Weathered sandstone with light blue gray color. Stone has a layered structure, strong cracking, fissures are filled with clay and calcic. Drill core is mainly in the form of lumps and few short bars, relatively hard.

4.1.1.9. Khe Dung Reservoir


134. Khe Dung reservoir is located in Quynh Thang commune, Quynh Luu district, Nghe An province with geographical location: North latitude: 19°14'35.18 "N; East Longitude: 105°35'7.18" E.

135. Quynh Thang is a mountainous commune of Quynh Luu district, 20km from the district center is limited by:


- The North borders Nghia Hoi commune, Nghia Dan district

- The South borders on Quynh Chau commune

- The East borders on Tan Thang commune

- The West border with Dong Hieu commune, Thai Hoa town

136. Khe Dung Reservoir basin is entirely in the basin of Vuc Mau reservoir. The reservoir area is located in the medium and low mountainous terrain, the whole region has natural elevation of 30.0m to 70.0m. The area benefiting from the medium high mountains comes to the half-mountain region, the terrain is low, only from 15 to 20m.

137. As with many reservoirs other than Khe Dung reservoir in the reservoir reservoir area, there is a phenomenon of local landslide, this phenomenon is due to the erosion process of the surface flow, causing landslides on the sides of the reservoir, making sediment deposited in the lake more and more.

138. Especially for Khe Dung reservoir because most of the basin is cultivated land for growing crops or industrial crops. Vegetation cover in the basin is basically unstable, after the harvest season, the basin surface is no longer tragic. In fact, the survey at the site of Khe Dung reservoir is very shallow, the difference between the lake bottom elevation in front of the dam and the natural elevation behind the dam is quite large (about 2m).

139. Dam route: through preliminary survey at the project, at Khe Dung dam site, soil and rock layers are evenly distributed, tight structure, good waterproofing. However, locally right shoulder beating, the position of the old slot has a permeability phenomenon.

140. Flood spillway: at present, the spillway surface has exposed the original stone, the strength is strong, the slant direction of the rock to the downstream with a large slope. However, sandwiching between layers of rock still has soil layers that should be overflowed by overflowing floods. Especially, the left side of the spill is strongly eroded to create a deep channel about 1m


141. According to the field survey data and laboratory laboratory data, the stratigraphic layer in Khe Dung Reservoir area consists of the following soil and stone layers:







4.1.1.10. Thanh Thuy Reservoir


142. Van Dien commune is a poor commune of Nam Dan district, 25km away from Vinh city in the West, limited by:

- The North borders on Nam Nghia commune.

- The South borders on Nam Dan town.

- The East borders on Xuan Hoa commune.

- The West borders on Nam Thai commune.

143. The focal point is located on the San slot and has the North Latitude geographical coordinates:


18 ° 43'38.47 "N; East Longitude: 105 ° 28'46.99" E. The basin of the lake is located on 2 sides of National Road 15 with a basin area of 2.8 km2, the vegetation cover is mainly pine hill, planted eucalyptus and shrub, the lake has a height of +8.20 to +20.00. Irrigation area is 135 ha, of which Van Dien commune is 120 ha and Nam Thanh commune is 15 ha.

144. Eomorphology in the subproject area can be divided into two main types, including:

- Moderate slope shape and erosion: This topographic form is mainly the average steep slopes.

- Accumulated topography: This topographic form is distributed mainly along streams, concentrating in the plain before the mountain stretching from the dam site to the whole irrigation area.


145. According to the field survey data and laboratory laboratory data, the stratigraphic layer in Thanh Thuy Reservoir area consists of the following soil and stone layers:

- About soil: The surface soil of the lake and the empty area of light to heavy clay, thick arable soil is suitable for water retention and agricultural cultivation.

- In terms of engineering geology: The old dam is a homogeneous soil of mixed clay mixed with gray-yellow-gray-brown color, slightly moist, half-hard, medium-tight soil. The old dam foundation in the two dam dams appeared with a clay layer mixed with 0.5-1m thick macadam with a permeability coefficient exceeding the permitted level, the rest were mixed with little gravel, unspecified depth. The flood discharge spillway adjacent to the right side adjacent to the auxiliary dam 2, on the left side, there is a strong weathered geologic foundation with clay siltstone

4.1.1.11. Tuan Reservoir


146. My Thanh commune is located in the southwest of Yen Thanh town, the center of the commune is about 15km from Yen Thanh town center. The commune has a traffic road passing through QL7. Key works are about 0.50 Km from QL7 road.

147. Total natural area: 15.63 km2. Geographical location by administrative boundary My Thanh commune has the following coordinates: 18055'1'' N; 105024'28''E.

- The North: Bordering on Dai Thanh commune, Yen Thanh district, Nghe An province;

- The South: Bordering on Thai Son commune, Do Luong district, Nghe An province;

- The East: Bordering on Cong Thanh commune, Yen Thanh district, Nghe An province;

- The West: Bordering on Hoa Son commune, Do Luong district, Nghe An province;

148. Topographic features: Topography in the construction area has two quite clear terrain types: hilly terrain and accumulated terrain.

149. Regional geomorphology is characterized by low hills mixed with narrow plains, with two sides of sloping hills, this is the result of a process of erosion, accumulation, strong development both vertically and cross-over dimension on a relatively homogeneous geological background, not layered. The erosion process thrives along the main stream systems in the region. The ruins of the ruins and the products of the original weathering process often have not very large thickness. Agglomerated terrain forms are alluvial products concentrated in the downstream of the dam.


- Embankment soil layer: light gray, gray, brown, reddish-brown clay. The status is hard to hard. (layer 1a): encountered in bore holes LK2, LK3, distributed at depths from 0.00m to 3.50m. The layer thickness varies from 3.40m to 3.50m, an average of 3.5m. This is artificial soil layer but it is relatively good, good mechanical properties, relatively homogeneous. Does not affect the body dam and the dam roof.

- Clay layer of gray brown, dark gray, white gray. Soft plastic state. (layer 1b): encountered in bore holes LK2a, distributed at depths from 2.40m to 2.40m. The layer thickness changes and


ends in this soil layer. This is the weakest layer, but it exists locally, thin layered. No major impact on stabilizing dam body and dam roof.

- Clay mixed with gravel and pebbles, weathered stone core is not completely gray yellow, blue gray, gray brown, red brown. The status is hard to hard. (layer 01): encountered in boreholes LK1; LK1a; LK1b; LK2; LK2a; LK2b; LK3; LK3a; LK3b, distributed at depths from 0.00m to 3.50m. The thickness of the layer changes and there are ends in this layer. Stable, firm layer, suitable for construction work as well as stabilizing body and dam roof.

- The siltstone clay layer is yellow-gray, brown-gray, blue-gray, strongly weathered into thin clay layers. (symbol 02): encountered in boreholes LK1; LK1a; LK1b; LK2b; LK3; LK3a; LK3b, distributed at depths from 0.50m to 4.50m. The layer thickness changes and ends in this soil layer. Stable, rigid and best mechanical properties in the survey area, suitable for building foundation work as well as stabilizing dam body and dam roof.

4.1.1.12. Hon Mat Reservoir


150. Nghia Loc commune is a mountainous commune of Nghia Dan district, 20km from Thai Hoa town, 80km from Vinh city to the West. The project area is limited by:

- The North: Nghia Binh commune

- The Southern borders: Tan Son commune

- The East borders: Nghia Long commune

- The West borders: Ma Thanh commune, Yen Thanh district

151. Key works: located on slots with latitude North: 19°12'40.70 "N; East Longitude: 105°26'38.65" E. Khe originates from the 340m high mountain range in the west, the basin of the stream takes into account the location of the dam construction of 5.5 km2, mainly steep mountains, production forests and livestock.

152. Irrigation area is a land area for cultivation planning for people in Nghia Loc commune. In general, the irrigated area is a relatively flat land area for 2-crop rice cultivation if irrigation water can be solved.

153. The construction site topography has two distinct forms of terrain: low mountainous terrain to medium high mountains and accumulation terrain:

- Low mountainous terrain to medium high mountains: This type of terrain covers both sides of the lake, mainly distributed in the southeast, northeast and northwest of the construction area, this type of terrain occupies The area is quite large, including the long-standing hills and mountains of beneficial areas, natural elevations in the reservoir area, changing from elevation + 61.7m to + 50.5m.

- Agglomerated terrain: distributed mainly in the lower part of the south and southwestern dams including streams and narrow plains in front of mountains, this is also the main cultivation area of the people in the region. project, with elevation from + 48.0m to + 50.0m.

154. Regional geomorphology is characterized by low hills and hills, and narrow plains, with relatively flat sides of hills, which is the result of a strong erosion, accumulation and development in both straight and vertical directions. cross-over and vertical on a relatively homogeneous geological background, not layered. The erosion process thrives along the main stream systems in the region. The ruins of the ruins and products of the original weathering process often have quite a large thickness. Agglomerated terrain forms are alluvial products concentrated in the downstream of the dam.


- Layer 1: Embankment soil, dark brown, yellow-gray clay, semi-hard to hard state containing 10-15% macadam of silt-softened claystone. Layer thickness up to 4.5m.

- Layer 2: Embankment soil, blue-gray clay, plastic, moist state containing water. 0.5 m thickness. This layer permeates water.


- layer 3A: Embankment soil, yellow-gray clay, semi-hard state containing 5-10% of macadam of siltstone of softened weathered clay. Layer thickness up to 1.5m.

- Layer 4: Embankment soil, blue-gray clay, semi-hard state containing 5-10% of macadam of weakly weathered Xerixit schist. Layer thickness up to 0.5m.

- Layer 5: Clay with dark brown, yellow gray color, hard to hard half state containing 15-20% grit, the origin of the sedimentary claystone is weathered. The layer thickness has not been determined yet

4.1.2.Meteorology, hydrology, rivers

155. The area for construction of climate-proof reservoirs: North Nghe An - South Thanh Hoa It is tropical monsoon with a rich rain regime, rainfall in the year from 1,500-2,300mm but unevenly distributed over time and space, limited to the rainy season and dry season as follows:

- Flood season is from July to November

- The dry season is from December to June next year

156. Flood rainfall accounts for 80-85% of the total annual rainfall.

157. Nghe An is annually affected by 1 to 2 storms in the period from August to October, the wind in the delta is very strong but rapidly weakens in the mountainous areas. According to records from the North Central Hydrometeorological Station, from 1967 to 2013, there were 64 storms in Nghe Tinh area, there were 8 storms of grade 12 and 11, so the storm in Nghe An has the wind speed of 11 to 12 grade and above grade 12 accounted for 56%. In recent years, heavy flooding has continuously occurred in Nghe An province.

a. Meteorological features :

- Temperature, humidity, rain :

158. Using the monthly average meteorological characteristics at the Tay Hieu Meteorological Station, Quynh Luu district has the following results:

Table 18: The average monthly meteorological characteristics Tay Hieu meteorological station

Features I II III IV V VI VII VIII IX X XI XII Year

Temperature 17.4 17.9 20.2 23.7 27.3 29.0 29.2 28.2 26.8 24.4 21.4 18.5 23.7Number of

sunny hours 87 58 76 134 223 203 227 189 175 162 152 114 1772

Humidity 86.3 88.5 90.2 89.9 85.3 81.0 79.7 84.5 87.1 85.5 83.6 83.3 85.4Rain 19.9 23.4 30.0 55.1 106.

0129.

7125.

1248.

7419.

6333.

1 82.9 33.2 1606.6

Evaporation 53.9 41.3 42.6 50.7 92.4 122 140 95.8 69.2 78.3 75.8 68.7 931

Table 19: The average monthly meteorological characteristics Quynh Luu meteorological station

Features I II III IV V VI VII VIII IX X XI XII Year

Temperature 17.4 17.9 20.2 23.7 27.3 29.0 29.2 28.2 26.8 24.4 21.4 18.5 23.7

Number of sunny hours 87 58 76 134 223 203 227 189 175 162 152 114 1772

Humidity 86.3 88.5 90.2 89.9 85.3 81.0 79.7 84.5 87.1 85.5 83.6 83.3 85.4

Rain19.9 23.4 30.0 55.1

106.0

129.7

125.1

248.7

419.6

333.1

82.9 33.21606.

6Evaporation 53.9 41.3 42.6 50.7 92.4 122 140 95.8 69.2 78.3 75.8 68.7 931

- Vaporiz:


+ Maximum annual evaporation: 1055 mm

+ Minimum evaporation year: 654 mm

+ Average evaporation: 915 mm

Table 20: Evaporation rate by month

Unit I II III IV V VI VII

Z(mm) 55.2 28.7 39.3 63.2 100.1 144.9 106.9

Score 0.059 0.031 0.042 0.068 0.107 0.155 0.114

Z(mm) 32.2 16.9 22.9 37.1 58.4 84.6 62.2

Unit VIII IX X XI XII Year

Z(mm) 59.7 111.3 74.0 71.0 80.5 935

Score 0.064 0.119 0.079 0.076 0.086 1.00

Z(mm) 34.9 65.0 43.1 41.5 47.0 546

- Storm:

159. The wind in this region is divided into two distinct seasons: from May to October, the main wind direction is the Southeast bringing humidity from the East Sea. The second wind direction is Southwest with a hot dry continental climate. From November to April, the main wind direction is Northeast, this wind causes dry or drizzling rain.

V 50% = 20.7 m/sV4% = 35.0 m/s

b. Hydrological conditions :

160. To calculate the hydrological characteristics for the study basin, we based on the measurement data at Khe La hydrological station, Tay Hieu station, Quynh Luu station.

161. Khe La hydrological station (F=27,8Km2 on Khe Thiem, with geographical location: 105020’N và 19006’E , monitoring factors: H,Q,X, , period: 1970 to 1994.

162. Tay Hieu meteorological station is part of the basic Hydrometeorological Network. Time of observation is from 1960 to present. Monitoring factors include: Rain, sunshine, temperature, wind, humidity, evaporation.

163. Quynh Luu meteorological station belongs to the basic network of Hydrometeorology. Time of observation is from 1961 up to now. Monitoring factors include: Rain, sunshine, temperature, wind, humidity, evaporation.

Table 21: Main flood flow

No. Name of reservoir

Frequency of

calculation0.01% 0.1% 0.2% 0.5% 1% 1.5% 5.00%

1 Don Hung Q ( m3/s) 367.61 245.85 219.26 196.93 185.66 2 Ke Sat Q ( m3/s) 450 316 281 256 241 3 Hon Mat Q ( m3/s) 311.75 165 139.2 126.5 113.9 83.14 Khe Dua Q ( m3/s) 72.38 50.423 46.769 42.099 39.3355 Khe Du Q ( m3/s) 46.2 32.185 29.852 26.872 25.1086 Rao Bang Q ( m3/s) 635.25 442.6 394 369.5 7 Tuan Q ( m3/s) 46.2 32.185 29.852 24.9 8 Hoc Nghet Q ( m3/s) 59.67 41.57 37.01 34.71 9 Thanh Thuy Q ( m3/s) 109 92.6 80.8 75

10 271 Q ( m3/s) 69.3 46.96 38.13 37.44 25.53



Frequency of

calculation0.01% 0.1% 0.2% 0.5% 1% 1.5% 5.00%

11 3/9 Q ( m3/s) 84.7 50.8 46.6 41.6 31.212 La Nga Q ( m3/s) 60.3 46.72 37.97 13 Khe Dung Q ( m3/s) 227.75 157.58 126.5


Table 22: Five-frequency flow P = 85%


VIII IX X XI XII I II III IV V VI VII Total

1 Don Hung 0.253 0.151 0.783 0.314 0.251 0.085 0.076 0.085 0.064 0.060 0.059 0.013 2.1942 Ke Sat 0.099 0.417 0.657 0.693 0.274 0.077 0.092 0.052 0.043 0.032 0.112 0.035 2.5833 Hon Mat 0.0701 0.0599 0.6323 0.0936 0.0350 0.0379 0.0287 0.0172 0.0229 0.0320 0.0530 0.0112 1.0944 Khe Dua 0.02519 0.0215 0.206 0.0333 0.0115 0.0144 0.0125 0.0076 0.0097 0.0067 0.0192 0.0041 0.37185 Khe Du 0.0161 0.0137 0.1316 0.0213 0.0073 0.0103 0.0079 0.0049 0.0062 0.0047 0.0123 0.0026 0.2396 Rao Bang 0.1393 0.1489 1.4254 0.1922 0.0793 0.0937 0.0871 0.0578 0.0725 0.0799 0.1422 0.031 2.54937 Tuan 0.0107 0.0091 0.0874 0.0136 0.0046 0.0061 0.0055 0.0033 0.0042 0.0029 0.0076 0.0016 0.1578 Hoc Nghet 0.0208 0.0177 0.1699 0.0263 0.0095 0.0126 0.0103 0.00627 0.008 0.0061 0.0158 0.0034 0,3079 Thanh

Thuy 0.0339 0.0290 0.2776 0.0374 0.0154 0.0228 0.0173 0.0105 0.0132 0.0155 0.0258 0.0055 0.504010 271 0.0154 0.0131 0.1257 0.0195 0.0066 0.0087 0.0079 0.0048 0.0061 0.0042 0.0110 0.0023 0.22511 3/9 0.0178 0.0152 0.1457 0.0226 0.0076 0.0101 0.0091 0.0056 0.0071 0.0049 0.0127 0.0027 0.26112 La Nga 0.023 0.019 0.185 0.025 0.010 0.014 0.012 0.007 0.009 0.10 0.016 0.003 0.33013 Khe Dung 0.088 0.076 0.724 0.098 0.038 0.056 0.045 0.028 0.035 0.038 0.063 0.013 1.301

(Source: Hydrological Report of the project)


c. Extreme weather phenomena in 8 districts under the subproject

164. Hot dry Southwest wind: in the the area the hot and dry Southwest wind is dominant with 40-50 days of hot dryness occur in average.. June and July are hottest with 20-25 days per month in average occur. In the hottest dry days the temperature may reach 39oC and the humidity lowers below 40%

165. Typhoons often occur from August and end in November or December. According to statistics for many years, Nghe An province has 3 to 6 storms every year, of which 2 to 4 storms have a direct effect.

166. In 2015 and the first 6 months of 2016: Nghe An has diverse terrain, harsh climate and large river and stream density. Frequently affected by natural disasters such as surges, high tides, storms, flood, flash floods and landslides. Situation of natural disasters in the province continues to develop abnormally. In the first 6 months, natural calamities killed 2 people and injured 6 people; 37 houses collapsed, over 2,500 roofs, damaged 23,901 ha of rice; 4,604 ha of corn and vegetables; dead 3,204 buffaloes and cows ... with an estimated loss of 188.3 billion VND. At the end of 2016 in the subproject areas due to storms and floods, the damage is estimated at VND 548.05 billion, specifically as follows:

- According to reports of localities and units, the whole province has 5 deaths (Nam Dan district 1; Yen Thanh district 1; Hung Nguyen 2 district; Thanh Chuong district 1). Housing and assets, collapsed: 13 houses (Thanh Chuong district); number of households flooded: 8,225 households, districts (Thanh Chuong, Hung Nguyen, Vinh City, Nghi Loc and Yen Thanh), up to now; number of households having to relocate due to landslides: 24 households (Nam Dan district, 8 households, Nghi Loc with 3 households, Thanh Chuong with 13 households) ... and being burned and damaged, many other equipment and machinery.

- Agricultural production: rice is flooded: 2,231.07 ha; of which 1,855.27 ha were damaged; types of maize and vegetables of different types were damaged: 7,674.92 ha; Annual crops lost 77.3 ha; damage of over 70%: 42.0ha; from 30 to 50%: 35.3 ha; Fruit trees lost over 70%: 6.0 ha... Livestock is swept away 322 animals; poultry is washed away: 22,224 animals; collapsing 6 sheds ... Aquaculture area flooded, losses: 3,506.6 ha; 3 fish cages were washed away.

167. In 2017: the province is affected by 28 cold air waves and 9 heat waves. Heatwaves have caused widespread drought, caused water in small dams downed to about 20-30% of capacity. In addition, in 2017, the province is affected by 28 cold air waves, 9 heat waves, 22 storms, thunderstorms, 3 storms and 3 floods. The impact of natural disasters killed 21 people, missing 2 people, injured 15 people; 175 houses were collapsed, swept away, more than 1,600 houses were badly damaged, 4,305 houses were flooded; losses of 57,868.28 ha of agricultural and aquatic production areas; killing 1,299 cattle and 75,897 poultry; causing damage to many schools, dykes, irrigation, rural transport and other essential infrastructure ... The estimated total economic loss is about 2,687.08 billion VND.

168. In the first 5 months of 2018, the province was affected by 7 thunderstorms, hail in Quy Hop, Con Cuong, Tuong Duong, Tan Ky and Quy Chau districts. The impact of natural disasters killed two people, injured 1 person; 7 collapsed houses, 601 roofed houses; 201.74 ha of agricultural and aquatic production area; killing 6 cattle and 661 poultries; causing damage to many schools, dykes, irrigation, rural transport and other essential infrastructure ... The estimated total economic loss is about 8,081 billion dong.

169. According to the forecast, in 2018, the number of storms and tropical depressions in the East Sea affecting Nghe An is likely to be equal or more than previous years. Specifically, at the meeting of deploying disaster prevention and fighting in 2018 of Nghe An province, the report of the North Central Hydro-meteorological Station predicted that the 2018 hurricane season may appear soon, affecting Nghe An more. The average temperature from March to August 2018, on the scale of the North Central region in general and Nghe An in particular, is approximately equal to the average for many years, the hot sun tends to appear late and less severe.

170. In terms of hydrology, the dry season of 2018, the flow of rivers and streams is popular at


approximately below average for many years, in many rivers and streams there is the possibility of the lowest water level of recorded monitoring data series. During the flood season of 2018, flood peaks in Nghe An rivers and streams are mainly at alarming levels 2 and 3; some rivers and streams on alarm 3; flash floods, landslides occur similar to 2017.

4.2. Status of Natural environmental quality

4.2.1. The quality of the physical environment

4.2.1.1. Selection of location, parameters and frequency of measurement, sampling

171. The positions of environmental quality survey in the subproject area are selected based on:

- The selected point represents to the regional environment situation;

- Emission sources characteristic;

- Sensitive characteristics of the recipients

172. Sample location for analyzing the quality of environmental components in the subproject implementation area is detailed in Appendix 4 of this report.

4.2.1.2. Quality of ambient air environment and nois

- Air environment (K1,2,3 ... 13;): Take 1 sample at the main dam location of each reservoir.

- Noise (O1,2,3, .., 13): Take 1 sample at the main dam location of each reservoir. The duration of continuous measurement of each measurement is 10 minutes, at least 03 measurements shall be conducted within 1 hour, then take the average of 03 measurements. The result is considered as the average value of that measurement hour

- Air and noise parameters: Temperature, Humidity, Pressure, Wind direction, Wind speed, TSP, CO, NO2, SO2, Laeq.

173. Results of analysis of ambient air quality and noise at works under the subproject are presented in Appendix 4 of this report.

174. Results of analysis of ambient air quality and noise are compared with the follow QCVN:

- QCVN 05: 2013 / BTNMT: National standard on ambient air quality

- QCVN 26: 2010 / BTNMT: National standard on noise. In the table above the noise level applied * The limit value allows noise levels in normal areas from 6 am to 21 pm.

175. Remarks: The monitoring results showed that the air environment quality in the subproject implementation area is in allowable range in compared to the standards, the area of 13 lakes has cool climatic conditions, natural forest vegetation, shrubs grow well, monitoring parameters are within the permissible limits according to QCVN 05: 2013 and QCVN 24: 2016 / BYT, QCVN 27: 2010 / BTNMT on ambient air quality (dust, noise,).

4.2.1.3. Quality of surface water

- Surface water environment (M1,2,3, .., 13): Take 1 sample at the upstream of the main dam of each reservoir.

- Parameters for measuring surface water environment: pH, DO, COD, BOD5, NH4+ -N, NO3

- -N, Fe, Coliform

176. Results of surface water quality analysis at works under the subproject are presented in Appendix 4 of this report.

177. Results of analysis of surface water quality are compared with the follow QCVN:

- QCVN 08-MT: 2015 / BTNMT: National standard on surface water quality

178. Remarks: The monitoring result of water surface in eight reservoirs of the subproject showed that the water quality in the reservoirs meet the standard of B1 used for the purpose of irrigation. There is no parameter beyond the allowable limit in accordance with B 1 standard in QCVN 08-MT:2015/BTNMT.


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The area where the subproject is implemented is in rural areas, there are almost no industrial production activities in the basin of the reservoir, the waste is mainly from farming, agricultural production, and husbandry. However, this source of waste is insignificant, the surface water quality in the project areas is quite good, can be used for irrigation, irrigation or other uses with water quality requirements similar.

4.2.1.4. Quality of groundwater

- Groundwater environment (N1,2,3, .., 13): Take 1 sample at the location of the household wells near the subproject area.

- Groundwater monitoring parameters: pH, hardness, TSS, NH4+ -N, NO3

- -N, Fe, Coliform

179. Quality of groundwater is measured and sampled at drilled wells in residential areas. The results of analysis of groundwater quality of works under the subproject are presented in Appendix 4 of this report.

180. The results of groundwater quality analysis were compared with the follow QCVN:

- QCVN 09-MT: 2015 / BTNMT: National standard on underground water quality

181. Groundwater quality monitoring results showed:

- Concentration of metals is lower than the allowed limit.

- The concentration of TSS, Ammonium, Phosphate of the samples is at average level.

- Through the results of measurement and analysis of groundwater samples, it is showed that the value of analyzed parameters in groundwater is below the permitted limit of QCVN 09-MT: 2015 / BTNMT.

4.2.1.5. Quality of soil

- Soil environment (D1,2,3, .., 13): Take 1 sample at the main dam site of each reservoir.

- Soil environmental monitoring parameters: Cu, Pb, Zn, Cd, As.

182. Results of analysis of soil environment quality in works under the subproject are presented in Appendix 4 of this report.

183. Results of soil environment quality analysis are compared with the follow QCVN:

- QCVN 03-MT: 2015 / BTNMT: National regulation on the allowable limits of some heavy metals in soil.

184. Results of soil quality monitoring showed:

- The quality of soil in the project area has no signs of pollution.

- The content of heavy metals is below the permitted limit of QCVN 03-MT: 2015 / BTNMT (agricultural land).

4.2.2. Status of biological resources

4.2.2.1. Flora

185. Plants in the subproject's area have little diversity of species, in which the dominant group of man-cultivated plants, wild plants account for less. Based on the survey results of the current status of the subproject, the implementation of the sub-project can be divided into the following groups:

- The subproject area has the majority of the surrounding area is forestry land (production forest), other agricultural land (fruit trees: banana, longan, orange). According to survey data, plants in the project area mainly include crops such as acacia, fruit trees, bamboo, ... and shrubs, bamboo groups, grass groups and vegetables. Agricultural vegetables of households cultivating in the project area.

- Production forests within the project area have a forest age of 3-5 years because households receive forests from the People's Committees. The volume of timber is from 50 - 70m3 / ha, all of this timber is mainly supplied for the purpose of timber raw material for basic construction,


processing of pulp, peeling board, joinery board ... and a part used in building civil furniture to serve people's life.

- Types of forest trees planted by households on the land area of the subproject according to survey results and information from households in the project area include: Acacia hybrid AH1, AH7; Hybrid glue BV33, BV71, BV 73, BV 75, and Eucalyptus.

4.2.2.2. Fauna

186. The fauna in the study area is very poor in terms of species, there is no record of rare and endangered species subject to strict conservation and protection, no species recorded in the red book:

- Vertebrate animals include: bird class, mammal class, reptiles class, amphibian class, fish layer, ...

- Invertebrate animals include: Crustaceans Coneechostrac, crustaceans Decapoda, Rotatoria.

- Cattle and poultry include: pigs, chickens, ducks, geese, buffaloes, cows, goats, fish.

- In fact, the project area is due to frequent human activities so the fauna is affected a lot in quantity and variety.

187. On the basis of the results of the assessment of the current status of biological resources in the project area, mainly forestry and agricultural ecosystems, the species composition is often monotonous, mainly cultivating and raising by residents. Within the subproject, there are no objects of conservation, protection and no significant biological value species affected by subproject activities..

4.2.2.3. Aquatic ecosystem

- Zooplankton and phytoplankton are found in ponds, lakes, streams and fields. Phytoplankton are mainly green algae and diatoms. Zooplankton is mainly Cladocera, Rotatoria, Copepada ... Fish reared in the main ponds are carp (Cyprinus), Troi (Cirhina molitorella), Sesame, Tilapia ... Fish production in ponds is not high.

- Biological composition of ecosystems of water bodies in streams is not abundant, mainly some kinds of fish in rivers and streams, there are about 30 typical species such as carp, Crucian carp, catfish, Paralaubuca typus, Chanodichthys, Escualosa thoracata, Hemiculter leucisculus, eel, perch, Macropodus, banana fish, sardines, fatty fish, Squaliobarbus curriculus, Drift fish, tench, tilapia...

- Regarding phytoplankton, there are typical species of mountain rivers and streams, species that favour in flowing water such as: clodophora glomerata, C.zhijoidoideo, chaetomorpha sp. ulothix tenerxima and some typical species of river delta such as chamaesiphon incrustans, coconeis placentula, nostochopsis lobatus, along the river spirogyra zhifoides. Varieties of algae pediastzum, scenedesmus, cosmorium, cloterium, meriomopedia, glococapoa, fragilaria, synedra... This area also encounters typical tropical species such as: oscillatoria peroznata, O.primceep, phormidium mucosum, hyngbya sestuarii, cymbella japonica, achnom thes crenulata, witzschia obtusa. The density of phytoplankton in the river is poorer than in a standing lake, but this is an area adjacent to the plains, which is quite rich.

4.2.2.4. Current status of organisms in the channels and reservoirs of the subproject area

188. Zooplankton in freshwater ecosystems include three main phylums: Rotifers, Crustacean Crustaceans and Flippers. They are primary consumers that occupy an important place in the aquatic food chain. In some aquaculture ponds they are meant as a natural food base for shrimp and fish, especially during the offspring.

189. Phytoplankton mainly composed of algae (green algae, cyanobacteria, yellow algae, silica algae, armor algae) and bacteria. Phytopplankton play a role in producing the original organic matter, creating the basis for the existence of most aquatic animals. The abundance of phytoplankton depends on the content of nutrients, some trace elements, light intensity, temperature, flow.

190. Zooplankton use phytoplankton as food, so their strong growth can degrade the floating flora in the pond. On the other hand, many studies have showed that zooplankton density and composition are capable of indicating water quality of water bodies.


191. Benthic The phylum polychaete, crustacean and mollusk are the groups of benthic that play an important role. The benthic are the basic food components of benthic organisms; In addition, crustaceans and molluscs are precious foods with high nutritional value.

192. The fauna and flora in the project implementation area, although it does not show the diversity and abundance of species composition of forest ecosystems, but their existence is meaningful for the balance of fertility. ecological protection of biodiversity

4.3. General socio-economic characteristics of sub-project areas

4.3.1. Socio-economic characteristics of subproject communes

a. Agricultural sector condition in subproject area

(i) Crop structure in agricultural production in subproject area

193. The situation of cultivated area in spring crop in 2018 of Nghe An province is as follows:

- Rice: cultivated area 91,797.3 ha / plan 90,000 ha (reaching 102.0%);

- Corn: The area of 18,345 ha planted is 17,000 ha (reaching 107.9%);

- Peanut tree: The area planted 13,234.2 ha / planning 13,000 ha (101.8%);

- Vegetables of all kinds: The area has been planted 12,058.5 ha / plan of 10,500 ha (reaching 114.8%).

- Bean plants of all kinds: Cultivated area 840 ha / Plan 1,000 ha (reaching 84.0%).

194. Plan for planting agricultural crops in the summer-autumn crop of 2018 in the subproject area is showed in the following table:

Table 23: Plan for planting agricultural crops in the summer-autumn crop of 2018 in the subproject area

No. Districts

Rice (ha)

Corn (ha)

Peanut tree (ha)

Sesame (ha)

Vegetables of all

kinds (ha)

Bean plants of all kinds (ha)

total area

Insidesummer-autumn

crop

Season

total area

upland rice

1 Yen Thanh 12400 12200 200 0 860 100 50 900 402 Quynh Luu 7550 5800 1.750 0 850 110 150 1480 503 Nam Dan 6100 6100 - 0 0 15 150 820 13004 Do Luong 7300 7300 - 0 520 160 50 380 300

5 Thanh Chuong 5400 5400 - 0 1000 200 350 1600

6 Tan Ky 4650 - 4650 0 1640 110 0 330 1307 Nghia Dan 3500 250 3250 0 1000 80 50 500 8 Thai Hoa 750 - 750 0 250 0 150

195. In the area, the subproject of plant structure is mainly 2-crop rice and corn.

(ii) Types of chemical fertilizers and pesticides commonly used and utilization rates

For transplanted rice:

- The amount of fertilizer for 1 ha: 4-5 kg of organic fertilizer, urea nitrogen 8-12 kg 6-12 kg K chloride, 15-25 kg superphosphate Lam Thao. Specific fertilizers depend on the type of rice, the nature of the soil.

- Fertilizer for rooted rice (15-20 days after transplanting): 50-80% protein 20-40% K, 5cm flooded water level.


- In addition to ensuring high and stable productivity, it is necessary to better control some rice pests such as brown planthopper, stem borer, sheath blight, blast disease.

Hybrid corn plants:

- Amount of seeds for 1 ha: 15 kg

- Organic fertilizers: plains of at least 4-5 tons, 3-4 tons or more.

- nitrogen fertilizer: 300 kg

- Lan: 400 - 500 kg

- Potassium: 150 kg

Purebred corn:

- Amount of seeds for 1 ha: 25 kg

- Organic fertilizers: plains of at least 4-5 tons, 3-4 tons or more.

- Nitrogen fertilizer: 200 - 250 kg

- Lan: 350 - 400 kg

- Potassium: 100 - 120 kg

Current pesticides are often used: for pests and diseases: Regent 800WP, Karate 2.5EC... spray when 1-2 year old larvae with active ingredients: Indoxacarb (Obaone 95 WG … ), Flubendiamide ( Takumi 20WG…), Chlorantraniliprole (Virtako 40WG, Prevathon 5 SC, Voliam targo 063SC); Đối với bệnh: Camilo 150SC, Chevil 5SC, Tilt super 300EC, Nevo 330EC, Anvil 5SC, Rovral 50WP, Callihex 5SC, Hecwin 5SC, A.v.tvil 5SC, Til calisuper 300EC,... Currently a number of pest and disease control technologies are applied in the project area. Rate of pesticide use as recommended by the manufacturer and each drug.

(iii) Implementation of integrated pest management in subproject localities

196. At present, in Nghe An province, there is Nghe An Agricultural Extension Center. In all districts, there are district and commune extension center and in commune, there is farmer association. The Nghe An Province Agricultural Extension Center coordinates with other levels to regularly organize professional training courses for agricultural extension staffs, collaborators and farmers. The participants are informed about the functions, tasks and technical guidelines. At the same time, the participants learn how to detect, prevent and treat some common pests, minimize the occurrence and spread of diseases, minimize damage to farmers and raise production efficiency in the process of farming. Currently, in the subproject area, it is complied with some basic principles in pest management as follows:

Growing and caring for the development of plants:

- Select good and suitable seedling for local conditions.

- Select healthy and qualified trees.

- Plant and maintain in accordance with proper technique so that the plants grow well with high yield.

Regularly check and understand the growth and development process of crops, pests, weather, soil and water for timely remedial measures.

Farmers become experts: technical knowledge and management skills of farmers need to be shared with others.

Pest control:

- Use disease prevention measures, depending on the severity of the disease in each stage.

- Use of pesticides with correct technique

- Protecting natural enemies: Protect beneficial species to kill pests


b. Security and order situation of communes under the subproject in the first 6 months of 2018

197. Hung Thanh Commune: The work of ensuring security and order in the area is always stable, regularly patrolling and controlling the situation in the area, strengthening the forces of patrolling, controlling and handling schools. disorderly. Continue to implement coordination regulations between 02 police forces and commune police. Regularly check temporary and temporary stay at inns, motels and rental houses, maintain management models in villages without drug crimes and social evils. Since the beginning of the year, there have been 3 disruptive cases, 02 theft cases, 2 traffic accidents, injuring 4 people. In the area where Don Ho lake is built, camps gather workers right at the lake location. The location of the campsite is about 1km away from the residential area, the security situation is always guaranteed, no theft and public order disturbance.

198. Tien Thanh Commune: The situation of political security in the area continues to be maintained. Commune People's Committee admitted 4 young people to the militia force, the organization trained on schedule, time and quality assurance. In the first 6 months of the year, there was 01 case related to security including: intentionally causing injuries, commune police accepting 01 case settlement, 02 administrative penalties. Traffic accidents occurred 3 cases, injured 4 people. The work camp area at the dam site is about 500m away from the residential area, the security situation is always ensured, the contractor needs to coordinate closely with the local authorities to ensure security and order when developing. Submission of subproject.

199. Nghia Loc Commune: The work of ensuring security and order in the area is always stable, regularly patrolling and controlling the situation in the area, strengthening the forces of patrol, control and handling of schools. disorderly. Regularly check temporary and temporary stay at inns, motels and rental houses, maintain management models in villages without drug crimes and social evils. Tourist businesses in Hon Mat area are always closely monitored. Since the beginning of the year, there have been 3 disruptions, 1 motorbike theft and 2 cases causing public disorder. Traffic accidents occurred in 3 cases, no deaths. The campsite of the subproject is located at the dam site, 300m from Hon Mat tourist area, 1km from the residential area, this area is located on Ho Chi Minh road and near the tourist area so crowded back and forth, so the contractor should coordinate closely with Nghia Loc Commune People's Committee to ensure public safety.

200. Nghia Thuan Commune: The situation of political security, social order and safety continues to be maintained; The armed units of the town strictly maintain the regime of direct combat readiness; strengthen patrol and guard forces to ensure safety of objectives, protect political security, social order and safety in the town. Organization of military training, political education, logistics - planned techniques and meeting requirements. Regarding social order and safety: there were 2 fights, 2 cases of property theft, 1 case of sabotage of the police department's property; Traffic order and safety: 1 traffic accident occurred 2 people were injured. The construction area of Khe Dua lake camp at the dam site. 400m away from residential area. Nghia Thuan Commune People's Committee will coordinate with contractors to ensure security and order in the subproject area.

201. Ngoc Son Commune (Quynh Luu District): Political security - social security order is maintained. Strengthening patrols and good management of localities. There were 4 small incidents in the year, there was no complicated criminal case; Small cases occurred in the area resolved. Organize the "All-people festival day to protect the national security". Finalize the application file for the Director of the Provincial Public Security Department to award the Certificate of Merit in the 5-year review of the Joint Resolution No. 01/2012 of the Central Committee of the Vietnam Fatherland Front Committee to the Ministry of Public Security on building the movement of the entire protect national security people in the new period. Good management of traffic safety corridors, ensuring traffic order and safety. The construction site of the subproject workers' camp is located at the dam site. 600m away from residential area, security and order situation is always guaranteed.

202. Nam Thanh Commune: Political security is maintained, basic social security order is ensured. Focus on launching the movement of all people protecting national security in the new situation. Organize patrols to ensure social security and traffic safety in the commune. Coordinate to organize the clearance of traffic safety corridors, propagate and mobilize people to do well in self-management, self-defense, self-defense, reconciliation and denounce crimes. Protection of cultural, art and sport activities organized by districts and communes. Coordinate to clear the traffic safety corridor of inter-commune roads. In the year of 3 incidents of property theft, 1 intentional injury; 1 gambling case, Report on Environmental and Social Impact Assessment (ESIA) 105

solved 5/5 cases by 100%. Good management of household registration, residence management, temporary residence, temporary absence; A total of 2068 households with 8455 people. Temporary registration: 65 people, temporary absence: 29 people, moving away: 37, moving to: 28 people. The location of the worker camp at the dam site, about 300m away from the residential area, security in the area is always guaranteed.

203. Hoa Son Commune: Coordinating well with the branches to mobilize and mobilize people to raise their vigilance, fight against social evils and theft; Good coordination work to strengthen patrol and control in the whole commune; There are three cases of theft of property transferred to the district police to investigate, in addition to conflicts in the communal police to promptly solve without consequences; Regarding traffic safety in the commune, there were 03 traffic accidents injuring 03 people and injuring 5 people. Area of construction camps at Khe Du Lake dam site, 300m from residential area. When the contractor comes to the locality, he will coordinate with the commune People's Committee to register temporary absence from the locality and coordinate with the commune police to ensure security and order.

204. My Thanh Commune: The situation of political security, social order and safety continues to be maintained; communal police units, militia and self-defense forces strictly maintain the regime of direct combat readiness; strengthen patrol and guard forces to ensure safety of objectives, protect political security, social order and safety in the town. Organization of military training, political education, logistics - planned techniques and meeting requirements. The work of ensuring order and security in the area is always stable, regularly patrolling and controlling the situation in the area, strengthening the workforce to patrol, control and handle disorderly cases. Since the beginning of the year, there have been 4 cases of disruption, 3 cases of 1 theft intentionally causing injury. A traffic accident occurred 1 case, injuring 2 people. The camp area of the subproject is built at the location of the Week dam, the CPC will coordinate with the contractor to ensure order and security, temporary residence registration for workers.

205. Quynh Thang Commune: Security situation in the locality is basically stable. Have been doing well in preventing and combating law violations, receiving timely settlement of incidents occurred 13 cases decreased 02 cases compared to the same period in 2017. Of which: Using 02 cases of guns, reducing 01 case over the same period; beating people who cause injury 1 case; gambling money 2 cases; 2 property theft; traffic accidents 05 cases increased 2 cases (dead 02 people in village 6 Dong Tam and Dong Xuan hamlet); violating the order of traffic safety corridors 01 case with 01 case, the case handed over to Hoang Mai transport district for handling; In the commune, there are 01 subjects participating in the pagan association "The Church of God"; 04 subjects follow the practice of Falun Gong. The location of the camp at Khe Dung Lake dam, the contractor will coordinate to register temporary absence for workers at the Commune People's Committee and with the CPC to ensure security and orde.

206. Van Dien commune: Maintaining the political security situation - social order and safety in the area. Coordinate closely with functional forces and neighbors to promote the movement "All people participate in protecting national security" to fight against crimes, propaganda of people to raise awareness of prevention and prevent push reversing social evils, ensuring traffic safety. Strengthen administrative management and object management. Actively check temporary residence, temporary absence, conditional business lines. In the first 6 months of 2018, there were 5 disruptive cases and 2 theft cases in the commune. The traffic safety situation in the commune has handled the road encroachment cases, there were 3 traffic accidents in the commune, injuring 4 people. The campsite of the subproject is built at Thanh Thuy dam site. CPC will coordinate with contractors to register temporary residence for workers, ensuring order and security when implementing the subproject.

207. Ky Tan Commune: In general, the situation of political security, internal security, rural security is stable, religious situation does not happen. Ensure the force and quality of the commune police force. In the first 6 months of 2018, there were 5 cases in the commune, of which 3 cases of property theft (1 case was transferred to the district police to handle according to authority) 2 cases of causing public disorder were treated by police regulations. Traffic safety order: there are 05 traffic collisions in the commune, killing 01 people, injuring 6 people, damaging 7 vehicles of all kinds. In Ky Tan commune, there are 2 dams are repaired, the contractor arranges workers' camp at the


construction site, 500m away from the residential area. The contractor will coordinate the temporary registration for workers at the CPC.

208. Ngoc Son Commune (Thanh Chuong District): The situation of political security in the area continues to be maintained. In the first 6 months of the year, there were 06 cases related to security and order, including: intentional injury: 02 cases; Property destruction: 01 case, theft of property 3 cases. Traffic accident occurred 2 cases, injured 4 people. The fighting gangs have decreased clearly, mainly in the conflict of the people, theft still occurs in the area. Commune People's Committee directs the Commune Police Department to strengthen patrol work to prevent cases in time, to completelyresolve conflicts in the population so that no complicated hot spots will occur and strictly handle illegal acts the law. Consolidate the activities of the ambush groups as the core for the mass movement to participate in the order and security of the TDA workers' camp area selected by the contractor at the position of Dam Nga lake, the locality will coordinate coordinate with contractors to ensure security and order in the subproject implementation area.

4.3.2. Social economic condition of subproject communes

209. Survey data on social conditions were investigated in October 2018, in 13 reservoirs of 12 communes of 8 districts in Nghe An province, as detailed in the table follow:


Table 24: Details on socio-economic conditions of subproject communes

No. Content

Quantity/ Rate

Hung Thanh

Tien Thanh

Nghia Thuan

Nghia Loc Hoa Son Nam

ThanhMy

Thanh

Ngoc Son (QL)

Van Dien Ky Tan

Ngoc Son (TC)

Quynh Thang

1

Number of village/hamlet 9 10 19 27 14 17 18 12 19 11 14 24

Number of cultural house 9 10 19 27 14 17 18 12 20 11 14 24

2 Land status 1,574.93 3,321.56 3,076.21 5,101.58 1,414.56 2,234.19 1,530.68 2,876.88 2,226.97 2,413.23 2,273.94 4,010.67

3

Population HH/ People

HH/ People

HH/ People

HH/ People

HH/ People

HH/ People

HH/ People

HH/ People

HH/ People

HH/ People

HH/ People

HH/ People

Number of household (HH) 1,426 1,700 2,883 4,087 1,898 2,104 2,324 1,958 3,187 1,602 1,815 2,287

Population (people) 6.406 6,050 11,70 16,398 7,136 8,412 8,017 8,407 13,597 6,720 7,850 9,823

4

Ethnic Composition % % % % % % % % % % % %

Ethnic Group: Kinh 100 100 100 93.7 99.98 100 100 99.7 100 100 100 95.18Ethnic Group: Thai 6.3 0.01 0.3 4.82Ethnic Group: Tho 0.01

5

Population Structure People People People People People People People People People People People People

Male 3,073 2,561 5,871 8,256 3,516 4,315 4,003 4,221 6,508 3,241 3,852 4,522Female 3,333 3,489 5,829 8,142 3,620 4,097 4,014 4,186 7,089 3,479 3,998 5,301At working age 4,209 3,800 6,821 9,582 3,074 3,785 5,511 5,810 6,551 3,814 3,975 5,715

6 Economic Structure % % % % % % % % % % % %

Agricultural 66.26 59.46 18 48.82 29.4 63.9 69.87 50.8 76 22.74 50.8 63.37Trade and service 16.29 18.12 44 21.25 34.1 20.9 13.9 34.1 16 59.43 34.1 23.13Other occupations: Industry, Construction, Transportation…

17.46 22.43 38 29.92 36.5 15.2 16.14 15.1 8 17.83 15.1 13.5


No. Content

Quantity/ Rate

Hung Thanh

Tien Thanh

Nghia Thuan


ThanhMy

Thanh

Ngoc Son (QL)

Van Dien Ky Tan

Ngoc Son (TC)

Quynh Thang

Average income per capita / year (million VND / year)

28.29 36 27.7 20.5 44.05 32.7 30.04 30.7 41.98 30 35 26.5

poor households 3.1 4.42 3.6 6.23 2.98 4.43 4.6 2.8 2.01 3 4.2 6near-poor households 15.5 12.16 8.1 4.1 3.85 16.92 13.5 5.6 6.09 4.51 6.3 7.96

7

Education School School School School School School School School School School School SchoolNursery School 1 1 1 2 1 1 2 1 1 1 1 1Primary School 1 1 2 1 1 1 1 1 2 1 1 1Secondary School 1 1 1 1 1 1 1 1 1 1 1 1High School 0 0 0 0 0 0 0 0 0 0 0 0

8

Number of Health Station 1 1 1 1 1 1 1 1 1 1 1 1

Number of doctor 3 1 1 2 1 1 1 1 1 1 1 1Number of physician 2 1 2 4 1 2 1 1 2 1 1 1

Number of bed 6 10 12 12 8 10 7 15 10 10 10 10

Medical facility Fully equipped

Fully equipped

Fully equipped

Fully equipped

Fully equipped

Fully equipped

Fully equipped

Fully equipped

Fully equipped

Fully equipped

Fully equipped

Fully equipped

Common diseases

Dengue, fever virus; flu, diarrhea ...












9 Market 1 1 1 1 1 1 1 1 1 1 1 210 Sensitive area Quantity Quantity Quantity Quantity Quantity Quantity Quantity Quantity Quantity Quantity Quantity Quantity

Temple 0 0 0 0 0 0 1 0 1 0 0 0Pagoda 0 0 0 0 0 0 1 0 0 0 0 0


No. Content

Quantity/ Rate

Hung Thanh

Tien Thanh

Nghia Thuan


ThanhMy

Thanh

Ngoc Son (QL)

Van Dien Ky Tan

Ngoc Son (TC)

Quynh Thang

Historical sites 0 0 0 0 0 0 5 1 1 0 0 0Cemetery 2 5 19 14 14 17 16 12 19 11 14 12

11

Roads, water and electricity % % % % % % % % % % % %

Natural road 61 56 46 48 53 57 55 60 59 53 58 56Other roads: concrete, asphaltic, crushed stones...

39 44 54 52 47 43 45 40 41 47 42 44

Use hygienic water 76.7 100 85 96 98 100 89.4 95.7 100 85 90 96Electricity 100 86,8 100 95 100 100 100 100 100 100 100 100Waste Collection Daily Daily Daily Daily Daily Daily Daily Daily Daily Daily Daily Daily

Source: SES Survey data in 10//2018


210. Economic conditions: Localities in the subproject area are mainly agricultural, agricultural economic activities are mainly from 18% to 69.87% with the cultivation of wet rice and corn. In addition, local people also cultivate many other agricultural crops such as beans, vegetables, tea ... In addition to agricultural activities, economic activities of localities also have trade services from 16% to 49.43%. Some households do forestry with major trees such as eucalyptus and acacia. Other industries such as construction, transportation and industry account for 8% to 38%. The average income per capita in the subproject communes is from 20.5 million to 44.05 million / person / year.

211. Traffic conditions: Conditions of construction of works are relatively good, transportation is convenient; At all sites, there is a road to the lake, serving construction to meet the demand of transporting materials during the deployment in localities. Inter-district and inter-commune roads and routes QL1A, QL7A, QL7B, QL15A, DT545, DT538 are all solidified plastic, very convenient for transporting materials and ensuring traffic safety. The roads for operation and management of the current lakes are still dirt roads, very muddy when rain occurs causing difficulties and dangers for transporting materials. Some main roads such as QL1A, QL7A, QL7B, QL15, QL48E, QL48B, QL46A, DT545, DT538, inter-village and inter-commune roads have been asphalted or concreted, often with heavy traffic, so it is required to pay attention to traffic safety. Most of the in tra-field roads of the communes are still mainly earth roads with a relatively high rate of 46-61%.

212. Education: 100% of communes have kindergartens, primary and secondary schools to meet the needs of education and training from kindergarten to lower secondary level in the locality. No commune in the subproject has high school.

213. Health: 100% of communes have health stations with the number of 1-2 doctors and from 1 to 4 nurses and from 6-15 beds. The most common diseases are: Dengue fever, virus, flu, diarrhea ...

214. Water use: Most households living in the subproject communes use dug wells or drilled wells for domestic purposes. Percentage of households using clean water is from 76.7% -100%.

215. Ethnicity: With the characteristics of the subproject area, ethinic minority people live in only 4 communes: Nghia Loc with 6.3% of Thai ethnic people; Hoa Son commune with 0.01% Thai people and 0.01% Tho ethnic people; Ngoc Son commune (Quynh Luu) with 0.3% of Thai ethnicity; Quynh Thang commune with 4.82% of Thai people. These ethnic minority households live far away from the subproject implementation area and no ethnic minority households are affected or benefit from the subproject.

216. Living conditions and community services: in general, in the subproject area, people have technical and social infrastructure conditions for stable and guaranteed living. People's Committees, schools, markets, health stations ... are located in favorable locations for people to access. 86.8% - 100% of households are using electricity, people use drilled wells, dug wells and rainwater. In all communes there are markets. In the subproject area, there is little local flooding because the drainage systems with drainage channels operate quite well. Most of the waste generated by the local sanitation team garbage trucks collect daily, all communes have their own waste dumps. All communes have cemeteries, sensitive works such as communal houses, pagodas, historical relics with only 3 communes, namely My Thanh, Ngoc Son and Van Dien. However, these works are far from the subproject implementation area and not on the subproject transport route. All villages in subproject communes have Cultural Houses.

4.3.3. Survey result of households benefited from subproject

217. A socio-economic survey was conducted by the consultant in October 2018 with 305 households / 2,650 beneficiary households (including 100% of AHs) from 13 reservoirs / 12 communes participated in the activity. consultations on social impact assessment for this subproject, equivalent to 11.5% of households. Households participating in household survey and consultation activities are all affected by the subproject. For the affected households by the sub-project of the socio-economic survey in this SA report, they were also surveyed and detailed inventory of the impact contents to prepare the RAP report (see details in the RAP report).

4.3.3.1. Socio-economic characteristics of the household

a. Demographic structure


218. The socio-economic survey results in the subproject communes show some of the following basic demographic characteristics:

Table 25: Demographic characteristics of households surveyed

Household structure Ratio (%)1- 2 member 21.63 - 4 members 41.15-6 members 27.7From 7 or more members 9.6Total 100

(Source: Socio-economic survey results, 10/2018)

219. The average demographic structure of all communes is 4.3 persons / household, the household structure is mainly in the group of 3-4 people on the household with the rate of 41.1%, the rate of households of 5-6 households members are 27.7%, households with 7 or more members are the lowest, accounting for 9.6%. It can be seen that the majority of households in the subproject area are nuclear families with a structure of parents and children (01-02 children), families with more than two children still have relatively high rates. Meanwhile the traditional family model with two or more generations living together is no longer popular.

Table 26: The average household structure is surveyed by commune level under the subproject

Commune Average

Household structure by demographic size (%)1- 2

member3 - 4

members5-6

membersFrom 7 or

more membersNgoc Son (TC) 4.3 2.5 83 6 8.5Van Dien 4.66 20.8 31.3 31.3 16.6Nam Thanh 2.5 2.4 30 60 8.6Hung Thanh 4.15 15.3 44.7 40 0My Thanh 4.48 12.6 41.7 37.4 8.3Tien Thanh 4.5 7.2 53.1 33.3 6.4Hoa Son 4.76 8.4 26.3 60 5.3Ngoc Son (QL) 4 15.2 61.3 15.4 7.7Quynh Thang 5.47 13.3 20 60 6.7Ky Tan 3.96 30.3 29.7 33.3 6.7Nghia Loc 5.06 5.9 12.8 70.7 10.6Nghia Thuan 4.53 16.7 30 40.2 13.1medium 4.3 2.5 83 6 8.5


b. Occupation

220. Majority of the main occupations of household heads in the survey sample are mostly agricultural, non-agricultural occupations account for a very low rate.

Table 27: Occupation of the household head

Occupation Quantity (people) Ratio (%)Agriculture and Forestry 273 89.5Civil servants 5 1.6work as a laborer 20 6.6Retirement / old age 7 2.3Total 305 100.0



221. The main occupation of the head of the household is farming, accounting for 83.6%, of which mainly farming and animal husbandry, the non-agricultural occupations in the sub-project communes are still relatively low. This is also consistent with the fact that the investment, upgrading and repair of lakes/dams in the province are focused on projects associated with local agricultural production activities. In the opinion of many households, the income from agriculture is currently quite uncertain, the price is not stable, many households have turned to non-agricultural work, free migration to big cities to find jobs or invest in children to export labor to create a bigger income for their families. Most communes believe that local workers have regular jobs over 90%, which may indicate that the efforts of the government and the people in job creation and livelihood diversity are significant..

Table 28: Main occupation of household head by subproject area (%)

CommuneAgriculture

and Forestry

Civil servants

work as a laborer

Retirement / old age

Ngoc Son (TC) 94.6 3 3 0Van Dien 94.5 0 5 0.5Nam Thanh 80.3 4 11.7 4Hung Thanh 85.8 3 9.2 2My Thanh 92.3 0 2.7 5Tian Thanh 93.3 2 4.7 0Hoa Son 89.5 0 8.5 2Ngoc Son (QL) 91 0 9 0Quynh Thang 86.5 3 5.5 5Ky Tan 89.5 0 6 4.5Nghia Loc 89.4 0 8.6 2Nghia Thuan 87.1 4 6.1 3Total 89.5 1.6 6.6 2.3


c. Education

222. The education level of the head of household is highly concentrated on middle and high school, in which lower secondary education accounted for the highest rate of 58.9%, the percentage of household heads with high school education is also quite high at 14.4%.

Table 29: Education level of the head of household

Education Quantity (People) Ratio (%)

Never attended school 0 0Primary school 42 13.8

Secondary school 102 33.4High school 153 50.2

Intermediate / vocational training 5 1.6

College/university 3 1.0Tổng 305 100


223. No people have never gone to school.

Table 30: Education level of household head by commune (%)


CommuneNever

attended school

Primary school

Secondary school

High school

Intermediate / vocational

training

College/university

Ngoc Son (TC) 0 9.8 7.8 20 33.3 11.9

Van Dien 0 6.9 10.5 0 0 7.1Nam Thanh 0 4.9 11.1 0 0 4.8Hung Thanh 0 7.8 7.2 20 0 14.3My Thanh 0 12.7 5.2 0 0 7.1Tian Thanh 0 8.8 4.6 0 0 14.3Hoa Son 0 6.9 9.2 20 0 16.7Ngoc Son (QL) 0 3.9 3.9 0 0 11.9

Quynh Thang 0 14.7 8.5 20 0 2.4

Ky Tan 0 9.8 5.9 0 0 7.1Nghia Loc 0 5.9 14.4 20 66.7 0Nghia Thuan 0 9.8 7.8 20 33.3 11.9Total 0 13.8 33.4 50.2 1.6 1.0


d. Income & poverty

224. From the survey survey results, the income of the people is divided into 5 levels to compare 20% of the lowest income group with 20% of the highest income group to see the differences in the next. access to social services as well as living conditions.

Table 31: Income and living standards of surveyed households

Income group Ratio (%)Under 31 million 12.6From 31 to 53 million 23.6From 53 to 76 million 14.6From 76 to 118 million 19.8Over 118 million 17.5


225. The average annual income of the surveyed households is VND 82 million per household, this result may be different from the annual statistical results of the local government because this is income before deducting expenses and number of households participating in the subproject is about 50 households, so the representation is not high but reflects the fact of the households located in the subproject area. The five income groups are divided as follows: The first group with the lowest income is under 31 million; The second group has an average income of between 31 and 53 million; The third group has an average income of 53 to 76 million; The fourth group has an average income of 76 to 118 million. There are 6 households surveyed as poor households with books (according to the multi-dimensional poverty calculation, including access to health services, education, information ...); and the 5th Group is the group with the highest income over 118 million. According to the Prime Minister's Decision 59/2015 / QD-TTg on poor and near-poor households, 12.6% of households in the lowest income group are in the income and poverty line.

226. The proportion of income quintiles in the survey sample is relatively uniform, but the gap between 20% of the lowest group and 20% of the highest income group is relatively large, this distance is near 4 times. The lowest income group often falls into disadvantaged households, not much of production materials such as land, while the high-income group is usually the non-agricultural business, households have relatives exporting labor.

e. Access to education and health services


227. One of the important indicators to assess people's living standards is the ability to access people's basic social security services such as health and education.

Table 32: Distance from home to service points in the subproject area

Distance to service points medium (m)Distance to market 1,951Distance to the medical station 1,980Distance to district hospital 10,117Distance to elementary school 1,531Distance to secondary school 1,552


228. Basic social services for people to access such as markets, commune clinics, primary and secondary schools are within the average range of less than 2 km, the distance is not too far for people to access easily and use. Therefore, all communes have met the standards of universal primary and lower secondary education and health care according to national criteria as well as provided convenient facilities and networks for people and children access to these basic services.

229. However, according to the community consultation meetings, in some communes it is difficult for people to travel to service points and schools, especially on rainy days because the roads have still not been yet invested in upgrading concrete, the rate of children who have to miss school in the rainy and stormy day is very high. For example, in Nam Thanh commune (with the Rao Bang lake project under the subproject), because the road to the commune center over Rao Bang dam has been damaged, especially the spillway. Therefore, whenever heavy rain or prolonged rain occur, the road is disrupted, it is very difficult for children to go to school due to taking detour road or they have to take leave. Therefore, the investment project to upgrade and repair some roads for management, operation and dam surface also contributes to easy and convenient travel and shortens a lot of time.

f. Housing, living conditions

Housing of people

230. Survey results of housing conditions of households in the subproject area are shown in the table below:

Table 33: Housing and living conditions of surveyed households (%)

House type Ratio (%)The house is solid one or more floors 22.4Semi-permanent house 73.1Wooden houses / corrugated iron (corrugated iron roofs, cement)

2.2

Simple house (wooden walls, corrugated iron roofing)

2.2

No housing 0


231. The proportion of houses of people is mostly semi-permanent houses 73.1% this is a traditional house type and very popular in rural areas in the North Central region, houses are often built with single brick walls and roofs. roofing with tiles or fibro cement, however, now many households have switched to roofing roofs with less permeability and increased life expectancy for the house. The rate of one-storey or more permanent houses also accounts for 21.1%, this is a clear manifestation of the change in living conditions in rural areas, besides that is the effect of the agricultural construction process. New villages have been launched since 2011 until now. In general, people's housing conditions are much better than before. No case in the survey sample, but without housing, shows that social security policies and housing conditions are very good for localities.

Household toilets

232. In recent years, rural clean water and sanitation programs have been started and brought positive


effects, changing living habits is not good for the health of rural people. In Nghe An, most localities are very interested in the issue of rural clean water and sanitation, because this is one of the criteria to evaluate the implementation of new rural construction results, survey results show that billions of The standard of people's toilets is very high.

Table 34: Type of household toilet (%)

Type of toilet Ratio (%)Septic toilets 63.2Rough toilets 30.4Simple toilet in the garden 6.1Public toilet 0.0No toilet 0.2


233. Proportion of septic toilets is 63.2%, mainly concentrated in the project communes in the plain and midland areas, while the rate of rudimentary toilets is still very high is 30.4% concentrated in mountainous areas.

234. In addition to improving sanitation conditions, domestic water sources of households have also been changed better than before.

Table 35: Characteristics of the family's drinking water source (%)

Water source Ratio (%)Tap water / clean water 13.6wells dug 62.3wells drilled 18.1Rain water 5.8Canals, rivers, streams, ponds and lakes 0


235. There is no difference in the use of drinking water and bathing water of the people, if in the past people often used many sources of water for daily activities such as eating and drinking, they often use safe water sources like tap water, rain water filtered or bought water for use, and bathing water is usually pond, lake or water wells dug, wells drilled.

Table 36: Characteristics of the family's bathing water source (%)

Water source Ratio (%)Tap water / clean water 11.8wells dug 67.2wells drilled 20.1Rain water 0.2Canals, rivers, streams, ponds and lakes 0.7


236. Thus, most people have a sense of using hygienic water sources to ensure family health in daily life, water sources are not hygienic like natural water on lakes and rivers. People streams have limited almost no use. However, the groundwater sources that people use today in some places are no longer hygienic if not through the filtration system. Rural clean water and sanitation programs for the mountainous area of Nghe An are essential, which ensures the prevention of dangerous diseases from the use of unhygienic water sources.

4.3.3.2. Land

237. Basically households have a certificate of land ownership, the total number of households without a certificate of land ownership accounts for 3.7% in the survey structure.

Table 37: Ownership of productive land by commune in the subproject


CommuneHave a land use right certificate

(%)

no land use right certificate (%)

Total(%)

Ngoc Son (Thanh Chuong) 98,2 1,8 100Van Dien 99,6 0,4 100Nam Thanh 93,5 6,5 100Hung Thanh 97,3 2,7 100My Thanh 99,1 0,9 100Tien Thanh 100 0 100Hoa Son 94,7 5,3 100Ngoc Son (Quynh Luu) 96,7 3,3 100Quynh Thang 96,8 3,2 100Ky Tan 100 0 100Nghia Loc 94,7 5,3 100Nghia Thuan 100 0 100Total 97,3 3,7 100


238. Through consultations, the assignment of land use rights in communes in the project area has done quite well in recent years. Only some very small areas such as lakeside / dams, people are reclaimed, so they do not have land use right certificates. This is also a very important issue in the process of tallying resettlement planning to prevent people from asking questions when the land areas owned by the dam site are withdrawn or communal land of the commune.

4.3.3.3. awareness of HIV

239. The survey results show that 100% of people understand that "HIV is a virus causing immunodeficiency in humans". Knowledge of the causes or pathways of HIV transmission of people is also very good. The results show that almost all people know that the main ways of transmission of HIV / AIDS are blood sugar, sexual sugar and mother-to-child transmission, only a very small proportion of 7.2% of people still thinking that being bitten by mosquitoes or biting insects will be contagious, this is still the wrong way of understanding HIV

240. As for the knowledge of HIV / AIDS prevention and control of the people, the following results are remarkable:

Table 38: Awareness of HIV / AIDS prevention measures (%)

Prevention True FalseLiving monogamy monogamous 100 0Isolate people living with HIV / AIDS 10.2 85.8Use condoms when having sex 97.0 3.0Use needle and syringe separately in all cases 100 0Do not shake the patient's hand 8.6 91.4Do not share bowls with patients 0.3 99.7


241. Basically, people have gained a lot of knowledge about HIV / AIDS prevention, the awareness of stigma towards HIV / AIDS has decreased a lot, but there is still a certain rate. People still have stigma or lack of understanding about the mechanism of HIV / AIDS transmission, so choosing those inappropriate HIV / AIDS prevention measures is: 4.3% said that they still need to live their lives Glass with infected people, 12.9% said that they should not shake hands with infected people and 7.7% did not share living utensils such as chopsticks with infected people. These are not true and prejudiced opinions, therefore, in the communication process of the project, it is necessary to integrate the contents of HIV / AIDS prevention and control and reduce the discrimination attitude towards infected people. of the people in the Report on Environmental and Social Impact Assessment (ESIA) 117

project area and the groups of workers on the construction works.

4.3.3.4. Gender issues in the subproject area

a. Gender in family decision making

242. The survey results show that there are significant differences in the division of labor in families between men and women. Although, the proportion of women and men who participated in deciding family issues was above 60.0%. Specifically, these are decisions of large family expenditures of 62.2%; decided to invest in production activities 72.2%. However, the decision to study / select children 's career is only 49%. Men decide that the jobs in the family are still higher than women, while the proportion of women who can make their own decisions is very small and only appear in 2 activities, decision of expenditure and decision. investment in production has a rate of 5.7% and 13.3%. The decision to study and choose the career of children is chosen by men, accounting for a higher proportion (50.2%).

Table 39: Gender in family decision making (%)

Participate in family decisionsEqual

participation

Men are predominan

t

Women are predominan

tDeciding major family expenses (shopping for valuable assets, weddings ....) 62.2 32.1 5.7

Decide on the study and career choices of children 49.0 50.2 0.8Investment decision, production activities 72.2 14.1 13.3


243. It can be seen that women who are in charge of reproductive roles, often have to take care of their children and houses, but have not been self-determined in important household tasks. However, the decision of both parties to make the majority is a remarkable thing in the effort to improve the gender equality index in the family. Women 's comments have been more and more respected.

b. Division of labor by gender

244. Survey results clearly show gender division of labor in the subproject area. Although all activities are attended by women and men, there are mainly male participation activities such as planting and working away from home..

245. Women's main jobs are cultivation, animal husbandry and child care and housework (see survey results in the table)..

Table 40: Division of labor by gender in production and daily life (%)

Production activitiesBoth

participate equally

Men are predominan

t


tCultivation 77.5 6.8 15.7breed 70.4 19 10.6Forest planting / care / protection 46.3 53.4 0.3Forest exploitation 58.9 40.5 0.6Fishing and aquaculture 58 34 8Workers 43.1 45.8 11.1Business 30.5 7.1 63.4Working away from home 34.9 46.5 18.6Take care of children 13.9 10 76.1Cleaning the house 17.1 0.7 82.2Cooking / housewife 9.4 1 89.6


246. The division of labor in the project area shows that women participate in production, reproduction and care activities while men are mainly involved in production activities..

247. The difference in gender division of labor according to the above results can be seen clearly with


the two activity groups, the majority of the production groups are men or both, however, choosing both to participate but women's participation is small and mostly supportive work giúp. Meanwhile, women reproduce, care for their homes and their children, almost all of them take over. There was also the presence of men or both in this activity but still very limited.

c. Women's participation in community activities

248. The survey results show that community activities such as community meetings, training on production and living of political organizations, male and female participation rates are also quite different. The proportion of men and women equally participating accounts for about 50%, but in some content, more men participate, such as training training, community meetings. Only in the social-political activities, women are equally involved with men, most are women's union organizations or self-managed activities established by women to help each other in household economic development.

Table 41: Gender in local community participation (%)

Join the community workBoth

participate equally

Men are predominan

t


tJoin the community meeting 56.5 28.5 15Participate in training and production training 61.8 29.5 8.7Activities of political and social organizations 45.7 28.2 26.1


d. Gender issues in management and leadership

Table 42: Number of women participating in leadership and management work in the subproject communes

No. commune Women participate in leadership managementNumber of

women in the communal

Party Executive Committee

Number of women in

the commune People's Council

Village leaders

The female manager is a leader in the total number of commune

officials1 Ngoc Son -Thanh Chuong 3/15 8/28 2/14 3/222 Van Dien – Nam Dan 1/9 5/29 0/19 3/223 Nam Thanh – Nam Dan 2/9 5/26 0/17 2/224 Hung Thanh – Yen Thanh 2/12 4/22 2/9 2/215 My Thanh – Yen Thanh 2/9 5/25 2/18 2/246 Tien Thanh – Yen Thanh 2/12 6/25 4/10 3/227 Hoa Son – Do Luong 2/12 3/26 1/11 9/228 Ngoc Son -Quynh Luu 1/9 6/26 4/12 1/229 Quynh Thang – Quynh Luu 2/15 5/30 6/24 2/25

10 Ky Tan – Tan Ky 1/9 4/28 1/11 2/2211 Nghia Loc – Nghia Dan 2/12 6/32 2/27 3/2612 Nghia Thuan – Thai Hoa 3/12 7/30 2/21 3/24


249. The survey results in the table above show that, although women have directly participated in leadership and management as well as participating in policy-issuing agencies, the rate remains low compared to men, especially at hamlet levels. The proportion of women in the total number of commune officials is still low. This is also a gender restriction in the current localities despite trying to implement documents and policies on gender equality, improving women's rights, status and voices in society.

4.4. Sensitive works


250. The subproject is carried out in 12 communes / towns, scattered across 8 districts of Nghe An province, in the process of deployment may create negative impact on the environment and people's livelihood activities. 7/13 works should be noted because of the impact in the reservoir area when repairing and improving dam safety as presented in the table below:

Table 43: Summary of the status of sensitive works

Place Status of the work

1, Don Hung reservoir and Ke Sat reservoir

1. Yen Thanh General HospitalThe location is right next to Tang Lang Street, which is a transport route for subproject materials to the Don Hung reservoir and Ke Sat reservoir. This area is crowded with people.Yen Thanh General Hospital provides general medical examination and treatment services, primary health care for residents in Yen Thanh district, with a large scale with nearly 200 beds and a hospital area.2. Vien MarketLocated right next to Tang Lang Street, opposite Yen Thanh General Hospital, is a route to transport subproject materials to Don Hung reservoir and Ke Sat reservoir. The market area is very crowded.The hospital market is a market run by households opposite Yen Thanh General Hospital, trading in food items, the main items are serving patients in hospitals and patients' families and near households and market area. Vien Market is self-focused by households, so the operation time is continuous throughout the day.

2, Khe Dua reservoir

1. Dong Hieu High SchoolThe location is close to the National Road 48A, which is the route for transporting subproject's materials to Khe Dua reservoir. The school area is crowded with students and passersby.Dong Hieu High School with 29 classes and over 1,100 students.



3, Thanh Thuy reservoir

1. Martyrs Cemetery Nam Dan District, Van Dien Commune People's Committee: Located right on National Road 15, next to Van Dien Commune People's Committee. National Road 15 is the route for transporting materials of Thanh Thuy reservoir. This is the administrative area and the memorial should be crowded.

4, Hon Mat reservoir

1. Hon Mat Tourist Area - invested by Minh Sang Construction Joint Stock Company at the reservoir location:The location is next to Ho Chi Minh Road and the management road of the lake. Tourist area has an area of 3.7ha. Currently the resort is in the process of finishing construction. Expected to be completed in 12/2018.2. There are 3 H-shaped electric poles and 200m electric cables affected by the construction process: At the dam body, there is 1 column, upstream dam 1 column, downstream dam 1 column. This transmission line serves the Hon Mat Tourist Area.



5, Hoc Nghet reservoir

1. Ngoc Son Commune Primary School, People's Committee of Ngoc Son CommuneLocated right on the inter-commune road, this is the administrative area and the school should be crowded. Primary school in Ngoc Son commune has scale of 16 classes and 539 students.2. There is 1 household building a cattle breeding area along the reservoir. There is one household building the breeding area on the hill land area of the household, the location of the breeding area is right next to the lake edge from the main dam to the right 70m. Existing farming areas are raising 4 cows.

6, Don Hung reservoir

1. System of road for operation and management, water ditchLocated right on the route of operation management of Don Hung reservoir, the canal system is adjacent to the management road. This system of ditches is a ditch that leads water from Don Hung reservoir to supply water for Hamlet 3 of Hung Thanh commune and a part of area in Nga Thanh commune.



7, Khe Dung reservoir

1. Local bridgeThe bridge is located on the route of transporting materials, 1km away from the lake, the bridge crosses the stream, the bridge condition has deteriorated, the bridge is 1.2m wide. under the earth road bridge. At present, the bridge serves the people of village 6,7,8,9 Quynh Thang commune to travel on rainy days because on the rainy days, the water level rises, the soil road is flooded and cannot pass. The bridge only serves when floods occur, so the number of people passing through the bridge is very low.

8, Tuan reservoir

1. 220kv power lineThe current 220kv power line crosses the dam body. This power line serves 2 hamlets of Quang Cu 2 with 87 households and Quan hamlet with 93 households.



9, Khe Du reservoir

1. Transportation route goes through Hoa Son Commune People's CommitteeAt present, the route of transporting materials to Khe Du reservoir goes on National Road 7, the People's Committee of Hoa Son commune is close to National Road 7, this is an administrative center, crowded and crowded with people to Commune People's Committee to carry out procedures administrative.

10, Rao Bang reservoir

1. The route to transport materials to reservoirs passes Vien Quang temple: This is a spiritual area, usually crowded with people who sing in the holidays, day 1 and 15 lunar calendar.

11, 3/9 reservoir

1. The area near the lake has 23 households living downstream of the dam, along the lake management road. The status of houses of households is a solid grade 4 houses. These households have no households doing business in services. Households mainly grow vegetables and fruit trees in gardens and animal husbandry is mainly chickens and ducks in


Place Status of the worksmall quantities providing food for the family.

12, 271 reservoir

1. Roads for transporting materials and road for operation and management are also routes for people to transport glue and eucalyptus when harvesting. Time for harvesting Acacia and Eucalyptus before April and before November 15 every year. Peak vehicle traffic during this time from 10-12 vehicles / 1 day.

13, La Nga reservoir

1. Roads for transporting materials and road for operation and management are also routes for people to transport glue and eucalyptus when harvesting. Time for harvesting Acacia and Eucalyptus before April and before November 15 every year. Peak vehicle traffic during this time from 7-8 vehicles / 1 day

2. The risk of drowning in La Nga reservoir: The current status of La Nga reservoir is relatively deep and where children often raise buffaloes and cows in this area. The area is far from residential areas, so the risk of drowning is high. On the other hand, in 2004 at the lake there was a drowning incident with children, so the position of the lake was always at risk of drowning.


CHAPTER 5: ENVIRONMENTAL AND SOCIAL IMPACT ASSESSMENT

5.1. Types and scale of impacts

251. The Subproject to be implemented in the area will cause certain negative impacts during the construction stage, however, the impact magnitude is not high and can be minimized. Upon the completion of construction, the residential areas in the 11 reservoirs will be benefited from the restoration of public services/facilities, which promote economic growth and access to social services. Important flood control structures that are roads and dams to be repaired, reinforced, rehabilitated will increase the safety for people and property in bad weather conditions.

252. Potential negative impacts are identified and screened at each subproject component from the preparation phase to the operational phase and classified according to the nature of the construction works. Most negative impacts aretemporary, local and reversible due to small to medium-sized construction scale of the works. Impacts can be minimized by applying appropriate technologies and specific mitigation measures with the close monitoring of the Consultant, PPMU and local communities.

The table below defines the levels of negative impacts based on the levels of waste generation by construction activities 1.

Table 44: The criteria for classification of negative impacts

Impact/Level Small Moderate LargeWaste water discharge (domestic and industrial wastewater)

Exceeding the technical regulation on waste from 1.1 times to less than 1.5 times

and the discharge volume is less than 5

m3/day

Exceeding the technical regulation on waste from 1.1 times to less than 1.5 times

and the discharge volume is less than 5 -

10 m3/day

Exceeding the technical regulation on waste to more than 3

times and the discharge volume is more than 10 m3/day

Dust and Emissions Exceeding the standard of 1.1 times to less than 1.5 times

with the emission level of less than 500

m3/hour

Exceeding the standard of 1.5 times to less than 3 times

with the emission level of less than 500 – 5000

m3/hour

Exceeding the standard of 3 times

with the emission level more than 5000

m3/hour

Noise Exceeding the standard of 2 to 5 dB

Exceeding the standard of 5 to 10 d

Exceeding the standard of 10 dB

Vibration Exceeding the standard of 2 to 5 dB

Exceeding the standard of 5 to 10 dB

Exceeding the standard of 10 dB

Domestic solid waste: Generate less than 1,000 kg / day

From 1,000 to 2,000 kg / day

Arise more than 2,000 kg / day

Hazardous waste Generate less than 100 kg / day

Generates 100-600 kg / day

Arise more than 600 kg / day

Fire and oil spill Less than 2,000 kg 2,000 to 10,000 kg More than 10,000 kg

253. Potential negative environmental and social impacts are also divided into types such as direct, indirect, short-term, long-term and cumulative impacts.

Direct Impact. direct impact occurs through the direct interaction of a subproject activity with environmental, social or economic components.

Indirect impact: The indirect impacts on the environment and society are the impacts that are not a direct result of the subproject, which is often created later, or as a result of a complex Indirect effects are also known as secondary effects, or even tertiary effects.

Cumulative impact: is an impact created as a result of a combination of subproject along with other projects that cause the associated impact. These impacts occur when the incremental impact of the

1 Based on Decree 155/2016 / ND-CP on sanctioning of administrative violations in the field of environmental protection.Report on Environmental and Social Impact Assessment (ESIA) 127

subproject is combined with the cumulative effects of past, present, or future projects that have the potentiality for predictability.

Temporary impacts: are the effects occurring during the construction or within a short time after construction.

Long-term impacts: are the effects that arise during the construction process but most of the results appear in the operational phase and can last for decades.

5.2. Positive environment and social impacts

5.2.1. Social impacts

254. The Subproject after being completed will bring benefits to the community and local authorities, namely, dam body and dam slope to be rehabilitated will ensure safety for downstream areas in rainy seasons, limit seepage and loss of water, ensure the flow of irrigation water for agricultural production in the downstream in accordance to the local government's production regulation plan, increase productivity and agricultural productivity as well as crop yields and aquaculture development. The works to be rehabilitated will ensure the stable supply for paddy and vegetable areas throughout the year in the downstream of 12 communes. They supply water for aquaculture area and limit negative impacts on the environment, landscapes of the reservoir areas and downstream. They stabilize the aquaculture water surface non-agricultural production and business, increase income and living standard as well as create more jobs and income, especially for unskilled and seasonal workers.

(i) Increase of proactive irrigation area

255. The investment in rehabilitation of 13 dams/reservoir will stabilize the irrigation water for 5,250 hectares to be active in planning cultivation, crop seasons, seedling structure for the downstream to step by step contribute to improving infrastructure and living conditions in difficult areas.

(ii) Impact on management capacity, operation of irrigation systems

256. The second year DRSIP project will improve the safety of the reservoirs and help the local authorities in the project area to develop long-term rural development strategies and scenarios, taking into account climate change scenarios and realizing activities to implement the national target program on climate change mitigation and adaptation, the Water Resources Development Strategy up to 2020 with a vision to 2050, the National Strategy for Rural Clean Water Supply and Sanitation up to 2020, the Program on Socio-economic Development in Mountainous Areas up to 2020, and the National Target Program for Building New Rural Areas;…

5.2.2. Environment impacts

(i) Impact on air quality and microclimate condition

257. The rehabilitation of the reservoir construction works will affect the air environment at the construction phase but in small space and impacts are local and intermittent. When the reservoirs are operating, they will have positive impacts on the change of some meteorological factors in the areas. For example, the stabilization of water surface will change the microclimate condition of each reservoir area and the moisture, which is relating to the continental dry, nature of the climate in dry seasons. In addition, in the operation phase, the Subproject will increase the stability of water resources and safety for the works and the dam downstream. (ii) Impact on the landscapes

258. At present, 13 exploiting reservoirs have spillways but some draining culverts are leaking, the slopes are not reinforced and there are not roads for management and operation of the works. As proposed by the Design Consultant, to ensure the safety of the dam body, draining culverts are need reinforcement, replacement and concretion of the works to ensure water storage, avoid water loss and create convenience for regulating water for production and operation of the reservoirs, which will ensure the development conditions for coastal vegetation communities, creating landscapes around reservoirs and local traffic.

259. The repairing, reinforcing the management roads of 13 reservoirs will create a new look for


the reservoir landscape and the surrounding area. The reservoir area will be beautiful, modern and safe.

(iii) Impact on the ecosystem

260. After the construction works in 13 reservoirs are complete, the stable flows of water and irrigation will contribute to the development of aquatic and plant ecosystems in the reservoirs and the downstream areas. There will be continuously and positive impacts on the ecosystem for long time, which help diversify and enrich the flora and the fauna in the subproject area.

(iv) Impact on groundwater

261. The completion of the construction works in 13 reservoirs will stabilize the water levels and increase the water level in reservoirs and ponds, which is higher than the downstream areas, therefore, after the reservoirs are operated, the downstream water level is always maintained year round to meet the demand for water for daily life and cultivation of local people.

5.3. Potential negative impacts from the subproject on the social environment

262. Although the implementation of the subproject will not increase the flooded area compared to the present status and will not increase the reservoir capacity, subproject’s activities are relating to land acquisition, site clearance and excavation, etc. Therefore, negative impacts from the implementation of subproject should be assessed and evaluated to propose appropriate mitigation measures. The negative impact of the project is identified, analyzed, and evaluated based on the scope of the project, the recipient and the timeframe. Impacts are analyzed in three different project implementation phases: i) pre-construction phase; ii) the project implementation stage; and iii) the operational stage of the project. Impacts will also be considered by impact type: direct impact, indirect impact, temporary impact, long-term impact. The level of impact of the project depends on two main factors: impacts that may arise from project activities and the recipient of these impacts.

5.3.1. Assessment and forecasting of impacts during the process of preparing the subproject

263. Because the subproject works are scattered in different areas, With the scale, the scope of each works is not large and the duration of the construction is not long. Therefore, environmental and social issues in this period mainly is: consider environmental factors, Impact sources are not related to waste and is related to waste. The impacts are analyzed in detailed as follows:

Table 45: Sources of impact during construction preparation phase

No. Impact source Impact / Waste Impact level Impact object

A - Source of impact non-related to waste

1 Land acquisition, land clearance

Occupying agricultural, forestry and public land Medium Households,

organizations

2 UXO clearance Landmines left over from the war Low

Workers at construction sites

and people

3 Mobilization of workers and machinery.

Impact of unsafe and public security and labor safety on construction sites

Low Workers and communities

4Activities of clearing demolition, site preparation

Impact on ecosystems and biodiversity Medium

Ecology, environmental

landscape, types of flora and fauna in the subproject area

B - Source of impact related to waste

1

Demolition, site clearance, transportation of materials and machinery

Dust and exhaust pollution, noise and vibration Medium

Workers and people in the subproject area


No. Impact source Impact / Waste Impact level Impact object

2

Wastewater comes mainly from activities of workers and stormwater runoff

Water and soil environment Low

Water and soil environment. Workers and local people

3Concentrating workers, preparing construction sites

Generation of domestic solid waste Low

Workers, environment and locality

4Activities of clearing demolition, site preparation

Generate plant waste, weathered stone. Medium

Natural environment, subproject area and locality

5 Impact due to geological exploration drilling

Underground water environment Low Underground water

environment

5.3.1.1. Source of impact non-related to waste

a. Land acquisition, land clearance

264. The area to be acquired permanently for the construction of the subproject total 4,672.26 m2, of which 641 m2 belong to 1 CPCs Van Dien. The remaining affected area of 4,031.26 m 2 are of 04 households in 2 communes where the subproject works locate. Among 04 AHs, there are no AH that have two types of affected productive land. The details are presented in table below:

Table 46: Total areas of land acquired permanently for the subproject

No. ImpactsOperation road Headworks (dam,

spillway...)Management

house Total

AHs Q’ty (m2) AHs Q’ty (m2) AHs Q’ty (m2) AHs Q’ty (m2)

1 Ke Sat reservoir 0 0 03 4,000.76 0 0 03 4,000.76

Land for perennial (LNK) 0 0 03 4,000.76 0 0 03 4,000.76

2 Thanh thuy reservoir 01 641 0 0 0 0 01 641

Forest land (RSX)

01 (CPCs)

641 (CPCs Management) 0 0 0 0 01 01

3 3/9 reservoir 01 30.5 0 0 0 0 01 30.5

Land for annual crops (BHK) 01 30.5 0 0 0 0 01 0

Total

02(01 Ahs

and 01 CPCs)

671.5 03 4,000.76 0 0

05(04 Ahs and 01

CPCs)

4,672.26

Unit: m2

(Source: SES survey, Oct 2018 and updated in Dec2018)

265. Total temporarily affected land area is 75,000 m2, including unused land, forest land, unused hilly land, land for annual crops, land with specialized water surface. This area is under the management of 12 CPCs, the status of all 75,000 m2 is shrubs and vacant land. There are no affected households due to temporary land acquisition. The land affected temporarily mainly due to being used for constructing camps for workers, serving as material stockpiling, construction machine parking, storing, and work tools keeping area. Some places are being used to keep spoils and debris temporarily before being dumped or transported to designated dumping place. This temporarily affected land will be compensated in accordance with the PRF policy and return to the landowner in the pre-works state


after the construction is completed.

Table 47: AHs and land acquired temporarily by the subproject

No.

District/

commune

Works Unit

Land affected temporarily

Unused land

Production

Forest land

Unused hilly land

Land for annual crops

Land with specialized water surface

Total

I Yen Thanh district

1 Hung Thanh

Don Hung

m2 - - 3,000 - 14,000 17,000CPCs - - 01 - 01 01

2 Tien Thanh

Ke Sat

m2 1,800 - - 2,500 6,500 10,800CPCs 01 - - 01 01 01

3 My Thanh

Dap Tuan

m2 - 1,000 - 1,900 600 3,500CPCs - 01 - 01 01 01

II Nam Dan district

1 Nam Thanh

Rao Bang

m2 1,000 - - 1,900 - 2,900CPCs 01 - - 01 - 01

2 Van Dien

Thanh Thuy

m2 1,000 - 3,000 - 1,000 5,000CPCs 01 - 01 - 01 01

III Tan Ky district

1 Ky Tan 271

m2 1,200 - - 1,000 - 2,200CPCs 01 - - 01 - 01

2 Ky Tan 3/9

m2 - - - 1,000 2,800 3,800CPCs - - - 01 01 01

IV Quynh Luu district

1 Ngoc Son

Hoc Nghet

m2 1,000 - - 1,500 5,000 7,500CPCs 01 - - 01 01 01

2 Quynh Thanh

Khe Dung

m2 2,000 - - - - 2,000

CPCs 01 - - - - 01V Thanh Chuong district

1 Ngoc Son

La Nga

m2 2,500 - - - 6,000 8,500CPCs 01 - - - 01 01

VI Do Luong district

1 Hoa Son

Khe Du

m2 1,000 - - - 600 -CPCs 01 - - - 01 -

VII Thai Hoa district

1 Nghia Thuan

Khe Dua

m2 2,000 - - - 1,500 3,500CPCs 01 - - - 01 01

VIII Nghia Dan district

1 Nghia Loc

Hon Mat

m2 2,700 - - - 4,000 6,700CPCs 01 - - - 01 01

m2 16,200 1,000 6,000 9,800 42,000 75,000

CPCs 10 01 02 06 10 12

Unit: m2



266. The crops and trees on the area of land acquired permanently for constructing the work items will be affected, including: two types of timber trees are acacia and eucalyptus with a total area of 4,641.76 m2 of 03 households and 01 commune People's Committee managed. In accordance with the Project policy, the crops and trees affected will be compensated at the market price

Table 48: Summary of timber trees affected permanently

No. Commune Works Unit Acacia Eucalyptus

1 Van Dien Thanh Thuy m2 0 641Tree 0 125

2 Tien Thanh Ke Sat m2 4,000.76 0Tree 800 0

Total m2 4,000.76 641Tree 800 125


267. Architectural works affected: The implementation of the Subproject at the works of Hon Mat reservoir, affect 03 electric poles H-shaped towers of 6.5x140C with 200m of CVV power cables- 2x1.5- (2x7 / 0.52) -0.6 / 1kv managed by the Thai Hoa Power Company.

268. Impact assessment: The level of impact of the subproject land acquisition is assessed as medium, long term because: i) the implementation of the subproject only invests in the repair and upgrading of works where the worker camp and material yards are expected to be located only in the corridor of the work protection corridor, the level of impact on households is negligible; ii) most of the land to be acquired is public land under the management of CPCs in the subproject area.

b. Landmines clearance (UXO):

269. According to a report on the status of landmine and UXO contamination (Vietnam National Mine Action Center), Nghe An province follows the survey data as follows:

- Survey of 19/19 districts (cities and towns), results of 19/19 districts (cities and towns) were identified as contaminated with mines and explosive objects, namely Vinh city, Cua Lo town and districts: Quy Chau, Quy Hop, Nghia Dan, Quynh Luu, Ky Son, Tuong Duong, Con Cuong, Tan Ky, Yen Thanh, Dien Chau, Anh Son, Do Luong, Thanh Chuong, Nghi Loc, Nam Dan, Hung Nguyen, Que Phong;

- A total of 477/477 communes (wards and towns) are identified as being contaminated with bombs and explosive objects is 100% of; The area of landmine contamination is 278,528.20 ha, accounting for 16.89% of the province's area;

270. According to the results of consultations and interviews in the subproject localities, no explosive objects have been detected in the subproject communes. However, in Nghe An province, there have been many times detecting bombs, mines and explosive objects and has been handled by authorities, there are still casualties caused by accidents related to the existence of explosives. Therefore, explosive objects can be found in the construction area or the quarry area. In order to minimize risks, the subproject owner should contact the demining authorities to assess the risks and provide safety confirmation of works before construction.

271. Overall assessment of impact level: small impact. It is necessary to strictly follow the steps to perform mine clearance to ensure a safe construction site before construction.

c. Impact due to unsafety of public order and security, labor safety on construction sites

272. Worker activities on site during the preparation phase. With the concentration of workers at each construction site about 1 week, with each reservoir of 5 workers will give rise to related issues such as conflict, insecurity of community order, or the labor accidents occur on site....

273. Conflicts arise: Conflicts between indigenous people and workers from other places come from cultural differences, lifestyles. In particular, the community in the subproject area is ethnic minority with a separate culture, thus creating conflicts, If not well managed, it will


cause some social consequences. Collisions and disputes on materials, property theft of people and businesses, losses of materials and equipment, crops ... are the causes of conflicts, insecure local security.

274. Impact assessment: small negative impactd. Impact on ecosystems and biodiversity

275. For vegetation, within the scope of construction of items in 13 reservoirs in the subproject area, there is no natural forest area, the surrounding area is mainly Acacia, Eucalyptus and fruit trees (litchi trees, Orange trees ...), shrubs are low, there are no rare and precious plants affected. Activities of clearing vegetation at the subproject reservoirs, mainly clearing shrubs in the area around the main dam, the management road and some acacia plantations encroaching on the downstream dam. The area to collect small vegetation should not affect the ecosystem and the surrounding landscape.

276. For animals, the construction area of 13 reservoirs under the subproject does not go through the area of primary forest, protection forest, or buffer area of the nature reserve. Scope of implementation The subproject has no rare and precious animals, only some wild animals (such as mice, snakes, birds ...), so the process of clearing vegetation can affect the food source of farm animals (buffaloes, cows, ...), and at the same time lose the shelter of some wild animals (snakes, rats ...), some species of bees, birds nest on trees.

277. Impact assessment: medium negative impact 5.3.1.2. Source of impact related to waste

a. Dust and emissions, noise, vibration

278. Dust, emissions, noise and vibration arising in this period mainly from the follow sources:

- From site clearance activities...

- From ground leveling; construction of camps and auxiliary works for construction;

- From the operation of construction machinery and vehicles;

279. Overall assessment of impacts: Impacts due to dust and emissions are assessed as medium due to: The above activities take place in a short time (about 1 week), the construction volume is not high, so the construction machinery and means use little. On the other hand, the project implementation area is located far away from residential areas, surrounded by hills and mountains, agricultural land, so the impact of dust and emissions generated from this activity will quickly be diffused and reduce the concentration. Therefore, its impact mainly affects construction workers, trees, crops around the project area and some households living near the lake have little impact on the concentrated residential area

b. Wastewater

280. During this period, wastewater originated mainly from workers' living activities and stormwater runoff. The amount of wastewater generated is similar to domestic wastewater in the construction phase, but due to the short construction period and the number of construction workers of this period low so the pollution magnitude will be much lower.

281. With the number of construction workers of the subproject is 5 people / 1works, the amount of water supplied to workers at this stage is 0.75 m3 / day / night / works, the amount of wastewater is 0.75 * 5 (workers) = 3.75 m3/day.

282. Domestic wastewater contains pollutants such as suspended solids, surfactants, organic substances, N, P and microorganisms ... with high contents that will pollute the soil, surface water, and groundwater. Therefore, this waste source must be collected and thoroughly treated before discharging into the receiving environment (tertiary irrigation canals near the subproject area)..

283. Overall assessment of impacts: The impact of wastewater is assessed as small because: the volume of wastewater in this period is low and in a short time.


c. Generation of domestic solid waste:

284. Arising mainly from daily activities of employees in the preparation period. In this period, the maximum number of workers concentrated in the project area is 5 people / 1 lake. According to World Health Organization WHO, the coefficient of domestic waste emission is 0.3 - 0.5 kg / person / day. Therefore, it is estimated that the volume of domestic waste generated during this period is 1.5 - 2.5 kg / day.

285. The amount of solid waste generated is not much, the main component is biodegradable organic waste such as leftovers, raw materials for food processing for workers (leftovers, fruit peel, ...) and a small part of packaging and canned foods.

286. Domestic solid waste generated during this period is small and unfocused. However, the area to be prepared for the construction of the project is located near the water surface of the reservoirs, so there will be small impacts on water quality without proper management and collection measures.

287. Overall assessment of impacts: The impact of domestic solid waste is assessed as low due to: low volume of domestic waste in this period and in a short time.

d. Waste from clearing vegetation cover:

288. The total occupied land area of the project is 0.468 ha of permanently acquired land and 7.5 ha of land temporarily occupied. In particular, trees were recalled 925 acacias, eucalyptus. Besides, there are some specific shrub areas as follows:

Table 49: The volume of biomass generated during the preparation phase

Name of reservoir Biomass type Area (m2)Biomass

coefficient k

Volume (kg)

Thanh ThuyWood tree (eucalyptus) 641 6.78 4,346

Wild plants, wild grass 5,000 0.199 995

Ke SatWood tree (acacia) 4,000.76 6.78 27,125

Wild plants, wild grass 2,500 0.199 498

Don Hung Wild plants, wild grass 0 0.199 0

Hon Mat Wild plants, wild grass 1,200 0.199 239

Khe Dua Wild plants, wild grass 1,000 0.199 199

Khe Du Wild plants, wild grass 1,600 0.199 318

Rao Bang Wild plants, wild grass 1,900 0.199 378

Dap Tuan Wild plants, wild grass 600 0.199 119

Hoc Nghet Wild plants, wild grass 2,500 0.199 498

271 Wild plants, wild grass 1,200 0.199 239

3/9 Wild plants, wild grass 0 0.199 0

La Nga Wild plants, wild grass 2,500 0.199 498

Khe Dung Wild plants, wild grass 800 0.199 159

289. Overall assessment of the impact of waste from clearing vegetation cover: Assessing the impact of Average.

e. Impact due to geological exploration drilling: Before the plan of design and construction works. The subproject conducted geological exploration drilling, this process was carried out at all reservoir projects under the subproject. Specifically, geological exploration drilling in all reservoirs, each reservoir is carried out in the following locations:


- Drilling machine along the main Dam heart drilling on land (average 15m / hole; drilling 3 holes: 1 hole at the intake under the dam, 15m deep; 2 holes in the shoulder of each dam are 10m deep).

- Drilling of cross-sectional main dam drilling machine (1x 10m deep pit at the drainage basin of water intake under the dam).

- Drilling the machine to cut the main dam under water (1x 10m at the drain tower to collect water under the dam).

- Drilling machine to cut the main dam, at the permeability position on the dam body, 1 hole of dam center for each position (2 holes x 10m).

290. General assessment of the impact of geological exploration drilling: impact assessed as low. Geological exploration boreholes of the subproject have a diameter of 75-100mm, with a depth of 10-15m. If these boreholes are not backfilled and landmarked at the drilling site, pollutants from the surface can follow rainwater through boreholes and affect the groundwater quality in the subproject area. Therefore, mitigation measures are needed for this impact.

5.3.2. Impact evaluation and projection during subproject construction phase

5.3.2.1. Source of impact

291. A summary of source of impact during construction phase is presented in the table below:

Table 50: A summary of source of impact during construction phase

No Source of impact Impact/Waste Level of impact

Object of impact

A - Source of impact related to waste

1

Construction activities:- Excavating - Repair of main dam,

auxiliary dam, overflow, flood spill

- Transport of materials, waste stone and soil

- Operation of construction machinery on site

Dust, emissions from the process of transporting construction materials are swept with the wind

Medium , short, controllable

Workers, Residents of the project area and

Quality of the

surrounding environment

Dust, emissions from process of transporting materials

Medium , short, controllable

Dust and exhaust of transport vehicles

Medium, short, controllable

Dust and emissions are generated by earthworks


Dust and emissions are generated by transporting waste rock and soil


Dust and exhaust gas arise due to the operation of construction machinery


2

- Overflowing rainwater swept with mud from the construction site

- Waste water from workers' activities.

- Wastewater from grease, chemicals used in construction

- Construction waste water

Impact on water environment


Workers, Residents of the project area and

Quality of water and

soil environment

3 - Waste rock and soil from earthworks and construction activities;

- Domestic waste from

Impact of solid waste Medium, short, controllable

Quality of the




Object of impact

workers' activities;- Hazardous waste from

related activities

4

- Impact due to sediment flow generated by erosion at the construction site when there is rain

- Excavated soil, stone and construction materials spilled out of the construction area

- Waste disposal activities are not well managed.

- operating at land mines causing spillage of soil to surrounding areas

Impact on surrounding agricultural cultivation areas


Quality of the


5 Soil type in construction Impact of dumping soil and rock in construction

low, short, controllable

Quality of the


B - Source of impact unrelated to waste

1 Equipment, machines Noise and vibration of machines and equipment

Low , short, controllable

People in subproject

area

2 Concentration of workers at project site

Impact on socio-economic conditions of the area

low, short, controllable People in the

subproject area,

workers

Risks of diseases and social evils due to concentration of workers

Low, short, controllable

3 Impact due to blocking water for construction

Impact on socio-economic conditions of the area


People in subproject

area

4 Traffic

Congestion and discontinuity due to material transportation Medium, short,

controllable

People in the subproject

areaParticipants

in the subproject area traffic

Damage to transport road and public works

5During the construction process, it may be found tomb or cultural relics

Impacts on tomb or cultural relics


Local, contractor

6

The process of transporting materials; workers transporting materials may cause dust, noise, conflict, borrow from the business shop on the transport road or areas near the project.

Impacts on livelihood and business activities

Low, short, controllable Residential

7

During the construction process, it may cause labor accidents, diseases; natural disasters.

Risk to health, traffic safety, labor safety, works safety


Workers and people



Object of impact

8

During the construction process, it may cause lack of water that women have to find alternative water resource.During the construction, children can travel across the project area and accidents or drowning may occur with children.

Impact on gender equality and children


Women and children

9 Demand for embankment material Impact on material mining Low, short,

controllableLand mine

area

10

The construction process will destroy the vegetation layer at construction sites, soil mines and waste dumpsWorkers gathered at the construction site can cut down trees, hunt animals in the lake and the subproject area

Impact on ecosystems Low, short, controllable

Types of plants and animals

11Risks and incidents during the construction process of the subproject

Incidents of labor accidents and traffic accidents


People, property

Accident caused by fire and explosion


People, property

Risks and incidents due to natural disasters


People, property

5.3.2.2. Source of impact related to waste

a. Impact on the air environment

(i) Arising sources

292. Activities that generate dust and emissions that can affect air quality, include: i) Excavation of soil and embankment of the works; ii) Operation of construction equipment at construction sites; iii) Operation of transport vehicles;

(ii) Impact assessment

293. The level of dust and air pollutants during construction of projects under the subproject depends on the demand for fuel use, excavation of soil and embankment and mobilization of machinery and equipment on construction sites (The volume of excavation of soil and embankment, materials and construction machinery specifically in section 2.3 of this report). According to the subproject design documents, the main needs related to dust generation on site are listed in the following table:

Table 51: Summary of material volume for project and volume excavation of soil and embankment


Volume

Total amount of diesel fuel dissipative

(Liter)

Total volume of raw materials served

(Ton)

Total volume of excavation of soil and embankment

(m3)1 La Nga 5,119.882 16,488.16 33,2612 Thanh Thuy 6,369.175 20,511.41 41,3773 271 8,172.253 26,318.08 53,091



Volume

Total amount of diesel fuel dissipative

(Liter)

Total volume of raw materials served

(Ton)

Total volume of excavation of soil and embankment

(m3)4 3/9 3,173.057 10,218.57 20,6145 Khe Dung 4,238.529 13,649.84 27,5366 Hoc Nghet 6,496.177 20,920.41 42,2027 Don Hung 22,129.54 71,266.4 143,7658 Ke Sat 19,554.68 62,974.27 127,0379 Tuan 1,550.22 4,992.358 10,071

10 Khe Du 3,022.25 9,732.912 19,63411 Hon Mat 9,499.088 30,591.04 61,71112 Rao Bang 6,958.855 22,410.43 45,20813 Khe Dua 5,334.921 17,180.68 34,658

(Source: Project estimates)

294. The projects under the subproject are scattered, relatively far apart in different communes so the cumulative impact of the works is not available. In-depth calculations of emission levels and the distribution of contaminants from the subproject activities that were carried out in the EIA report of the subproject were approved by Nghe An PPC. The calculation results were made on the basis of using emission factors, estimating the amount of pollutants arising from the type of related activities, then calculating the concentration of pollutants by interval Different ways for works, thereby determining the scope of impact. However, the level of impact depends on the sensitivity of the receiving subjects. Results of calculation of dust concentration, air pollutants from activities of vehicles, operation of construction machinery and earthworks are presented in the following sections.

b. Concentration pollutants in the air from the process of transporting construction materials are swept with the wind

295. According to the World Health Organization's rapid assessment of environmental pollution in 1993, the estimated emission factor of wind-blown dust when cars transporting construction materials drop off the road is 0.1 ÷ 1 g / m3. According to the volume of construction materials of each lake in the table 53 we calculate for 1 reservoir as follows:

296. La Nga reservoir: The amount of raw materials converted on an average of 1 m3 is equivalent to 2.5 tons. Therefore, the total amount of bricks, cement, iron and steel, and other materials is: 16,488.16 tons, equivalent to 6,595.26 m3.

297. Total amount of dust discharged from materials transportation during this period is applied by coefficient of emission coefficient of dust being swept up when cars transport construction materials to sdrop off the road is 0.1 ÷ 1 g / m3:

6,595.26 x (0,1 ÷ 1) (g / m3) = 0,1 × 6,595.26 ÷ 1 × 6,595.26 (g) = 659,526 ÷ 6,595.26 (g) = 0,659 ÷ 6,59 (kg).

298. The supply of materials is based on construction progress. The construction period of the entire project is 12 months, equivalent to about 288 days. The average daily dust load is: 0.002282 ÷ 0.02282 (kg / day) equivalent to 0.079 ÷ 0.79 (mg / m * s)

299. To assess the impact of dust and emissions due to the transport of construction materials during this period, we apply the Sutton calculation model - determine the concentration of pollutants at any point. The concentration of pollutants is calculated according to the following formula:


300. In which:

- C: airborne dust concentration (mg/m3)

- E: Pollutant load from waste source (mg/m.s)

- z: height of calculation point: 1 (m)

- h: height of the road surface compared to the surrounding ground: 0.5 (m)

- u: average wind speed in area 1.7 (m/s)

- x: coordinates of points to be calculated (m)

- : ust diffusion coefficient in the z direction, determined by the formula:

= 0.53x0.73

301. With x being the distance according to the blowing wind at the calculation point compared to the waste source (m)

302. Calculated concentration of pollutants in the air at 10m from the heart of the road is: 0.0244 – 0,244 (mg/m3), with a distance of 100m is: 0.0049 – 0.049 (mg/m3).

303. Similar to the calculation method with the remaining reservoir, we have the following table: (Particularly Don Hung and Ke Sat reservoir construction time is 24 months, equivalent to about 576 days)

Table 52: Concentration pollutants in the air from the process of transporting construction materials are swept with the wind


Concentration of pollutants in the air is from the

center of the road x = 10m (mg/m3)

Concentration of pollutants in the air is from the

center of the road x = 100m (mg/m3)

1 La Nga 0.0244 – 0.244 0.0049 – 0.0492 Thanh Thuy 0.0303 – 0.303 0.0061 – 0.0613 271 0.0389 – 0.389 0.0078 – 0.0784 3/9 0.0151 – 0.151 0.0030 – 0.0305 Khe Dung 0.0202 – 0.202 0.0040 – 0.0406 Hoc Nghet 0.0309 – 0.309 0.0062 – 0.0627 Don Hung 0.0527 – 0.527 0.0106 – 0.1068 Ke Sat 0.0466 – 0.466 0.0093 – 0.0939 Tuan 0.0074 – 0.074 0.0015 – 0.01510 Khe Du 0.0144 – 0.144 0.0029 – 0.02911 Hon Mat 0.0452 – 0.452 0.0091 – 0.09112 Rao Bang 0.0331 – 0.331 0.0066 – 0.06613 Khe Dua 0.0254 – 0.254 0.0051 – 0.051

QCVN 05:2013/BTNMT 0,3 0.3

304. From the above results, secondary dust is generated during the operation of vehicles for transporting construction materials and wastes in reservoir: Thanh Thuy, 271, Hoc Nghet, Don Hung, Ke Sat, Hon Mat, Rao Bang exceeds the permitted standards in accordance with QCVN 05: 2013 / BTNMT within 10m range from 1 to 1.6 times; reservoir: La Nga, 3/9, Khe Dung, Dam Tuan, Khe Du and Khe Dua are all lower than the permitted limits of QCVN 05: 2013 / BTNMT; and within 100m along the transport route, dust concentration is below the permisible limit of QCVN 05:2013/BTNMT.

305. Impact assessment: Impact is at medium level and controllable.

c. Concentration of pollutants through transport of materials

306. The total volume of materials to be transported is shown in Table 51. Use of transport means is truck (7-10 tons).


307. Characteristics of air pollution of transport vehicles include: Dust, SO2, NO2, CO, VOC, noise, vibration ... Load of pollutants is given by the table below.:

Table 53: Pollutant load coefficient for trucks running on roads (for 1000 km)

Pollutant

Pollutant load for road trucks (kg)

Vehicle weight 3.5 ÷ 16T Vehicle weight > 16T

In City Out city Freeway Trong TP In City Out city

Dust 0.9 0.9 0.9 1.6 1.6 1.3

SO2 4.29S 4.15S 4.15S 7.26S 7.43S 6.1S

NO2 1.18 1.44 1.44 1.82 2.41 1.98

CO 6 2.9 2.9 7.3 3.7 3.1

VOC 2.6 0.8 0.8 5.8 3 2.4

(Source: World Health Organization WHO, 1993)

308. Load of pollutants:

Table 54: Number of turns transport vehicles


Number of turns of vehicles

transporting the whole

project

Number of turns vehicles transported 1

day

1 La Nga 1649 62 Thanh Thuy 2051 73 271 2632 94 3/9 1022 45 Khe Dung 1365 56 Hoc Nghet 2092 77 Don Hung 7127 128 Ke Sat 6297 119 Tuan 499 2

10 Khe Du 973 311 Hon Mat 3059 1112 Rao Bang 2241 813 Khe Dua 1718 6

309. Estimated transport distance is about 30km.

310. Thus, the load of dust and exhaust gas from transport cars (applied to trucks of 3.5 ÷ 16T, running outside the city) is determined as follows.

311. Calculating the load for La Nga reservoir with 6 1-day trains, applying the pollutant load coefficient for the truck running on the road (for 1000 km), we calculate the load as follows: Dust: 5.625 (mg / m * s); SO2: 0.0130 (mg / m * s); NOx: 9.0 (mg / m * s); CO: 18 .125 (mg / m * s); VOC: 5.0.

312. To assess the impact of dust and emissions due to the transport of construction materials during this period, we apply the Sutton calculation model - determine the concentration of pollutants at any point. The concentration of pollutants is calculated according to the following formula:


313. in which:

- C: airborne dust concentration (mg/m3)

- E: Pollutant load from waste source (mg/m.s)

- z: height of calculation point: 1 (m)

- h: height of the road surface compared to the surrounding ground: 0.5 (m)

- u: average wind speed in area 1.7 (m/s)

- x: coordinates of points to be calculated (m)

- : ust diffusion coefficient in the z direction, determined by the formula:

= 0.53x0.73

With x being the distance according to the blowing wind at the calculation point compared to the waste source (m)

314. Applying the formula, calculated concentration of pollutants in the air at a distance of 100m due to the transport of materials of Is Nga Lake as follows: Dust: 0.3454 (mg/m 3); SO2: 0,0008 (mg/m3); NOx: 0.5527 (mg/m3); CO: 1.1130 (mg/m3); VOC: 0.3070 (mg/m3)

315. Similar to the above calculation applies to all reservoirs we have the follow results:

Table 55: Concentration of pollutants through transport of materials

No. Name of the reservoir Pollutants

Concentration of pollutants in the air is from the center of the road x = 10m

(mg/m3)

Concentration of pollutants in the air is from the center of the

road x = 100m (mg/m3)

QCVN 05:2013/BTNMT (mg/m3)

1 La Nga

Dust 1.7252 0.3454 0.3SO2 0.004 0.0008 0.35NOx 2.7603 0.5527 0.2CO 5.559 1.113 30

2 Thanh Thuy

Dust 2.0478 0.41 0.3SO2 0.0047 0.0009 0.35NOx 3.2765 0.656 0.2CO 6.5985 1.3212 30

3 271

Dust 2.6275 0.5261 0.3SO2 0.0061 0.0012 0.35NOx 4.2041 0.8418 0.2CO 8.4665 1.6952 30

4 3/9

Dust 1.0202 0.2043 0.3SO2 0.0024 0.0005 0.35NOx 1.6323 0.3268 0.2CO 3.2873 0.6582 30

5 Khe Dung

Dust 1.3628 0.2729 0.3SO2 0.0031 0.0006 0.35NOx 2.1804 0.4366 0.2CO 4.3912 0.8792 30

6 Hoc Nghet Dust 2.0886 0.4182 0.3


SO2 0.0048 0.001 0.35NOx 3.3418 0.6691 0.2CO 6.7301 1.3475 30

7 Don Hung

Dust 3.5575 0.7123 0.3SO2 0.0082 0.0016 0.35NOx 5.6921 1.1397 0.2CO 11.4632 2.2952 30

8 Ke Sat

Dust 3.1436 0.6294 0.3SO2 0.0072 0.0015 0.35NOx 5.0298 1.0071 0.2CO 10.1294 2.0282 30

9 Dap Tuan

Dust 0.4984 0.0998 0.3SO2 0.0011 0.0002 0.35NOx 0.7975 0.1597 0.2CO 1.606 0.3216 30

10 Khe Du

Dust 0.9717 0.1946 0.3SO2 0.0022 0.0004 0.35NOx 1.5547 0.3113 0.2CO 3.1311 0.6269 30

11 Hon Mat

Dust 3.0541 0.6115 0.3SO2 0.007 0.0014 0.35NOx 4.8866 0.9784 0.2CO 9.8411 1.9704 30

12 Rao Bang

Dust 2.2374 0.448 0.3SO2 0.0052 0.001 0.35NOx 3.5799 0.7168 0.2CO 7.2094 1.4435 30

13 Khe Dua

Dust 1.7153 0.3434 0.3SO2 0.004 0.0008 0.35NOx 2.7445 0.5495 0.2CO 5.527 1.1066 30

316. Calculated results showed that at a distance of 10m, it is compared with QCVN 05:2013/BTNMT, the concentration of pollutants such as dust, NOx in all lakes is exceeded many times. Concentrations of other pollutants such as SO2, CO, in all lakes are within the allowable limits. Therefore, appropriate mitigation and restriction measures are needed.

317. At a distance of 100m, compared to QCVN 05: 2013 / BTNMT, the concentration of pollutants such as Dust, NOx in all reservoirs is higher than 1-2 times (Subtract reservoir Tuan below the allowed limit), reservoirs 3/9, Khe Dung, Khe Du have lower dust concentrations than permisible limits. Concentrations of other pollutants such as SO2, CO, in all lakes are within the allowable limits. However, this is the immediate effect of 1 to 12 trips per day and the range extends throughout the transport so the effects are not long-lasting and can be controlled.

318. Impact assessment: Medium. can be minimized and controllable

d. Concentration of pollutants due to earthworks

319. In the construction of project works, diffused dust arises mainly from the following activities: Excavation and embankment activities by machines; transport of stone and soil; etc ...

320. According to estimated volume of excavation and embankment showed in section 2.3.1 of this report , we have the following results:

321. Dust emission coefficient due to Excavation and embankment activities in construction is presented in the follow table:

Table 56: Pollution emission coefficient due to construction activities


No. Causes of pollution Estimates emission factors

1 Dust generated by excavation, ground leveling, wind-blown up (sand dust) 1 - 100 g/m3

2Dust generated by the process of loading and unloading construction materials (cement, soil, sand, stone ...), machinery and equipment.

0.1 - 1 g/m3

3

Smoke discharged by vehicles, construction mechanics containing dust, CO, hydrocarbon, SO2, NOx ... (trucks of 3.5-16 tons of diesel oil run with S = 0.5%)

Dust: 4.3kg/tấn DO; SO2 :0.1kg/ tấn DONOx: 55kg/tấn DO;CO: 28kg/tấn DO

VOC: 12 kg/ tấn DO

4 Vehicles transporting sand and soil to scatter on the road surface generate dust 0.1 – 1 g/m3

Source: Assessment of Sources of Air, Water, Land Pollution, Who, Geneva, 1993

322. Based on the pollution emission coefficient in the above table and the volume of soil and stone for construction, we can calculate the amount of suspended dust flying into the air during the project construction time (working time: 8 hours / day, 12 months equivalent to about 288 days (24 months with Don Hung, Ke Sat Reservoirs) as follows: We calculate for La Nga reservoir.

323. The total volume of excavation of La Nga reservoir: 33,261 m3, the number of construction hours is: 288 * 8 hours / day = 2304 hours. Application of pollution emission coefficient due to construction activities, the amount of dust generated by earthworks and leveling in the construction area of La Nga reservoir is: 14.44 - 1444 (g / h) equivalent to the concentration follow:

324. Dust concentration of earthworks is calculated with the area of 2.5 ha and the emission height of 10m: 577 - 5777 (µg / m3 / h). Similarly, we have the following results for the remaining reservoirs:

Table 57: Concentration of pollutants through earthworks


The amount of dust generated during excavation and

embankment (g/h)

Average dust concentration

(µg /m3/h.)

QCVN 05:2013/BTNMT (µg /m3)

1 La Nga 14.44 - 1444 577 - 5777 3002 Thanh Thuy 18.0 - 1800 718 - 7180 3003 271 23.0 - 2300 922 - 9220 3004 3/9 8.9 - 890 358 - 3580 3005 Khe Dung 12 - 1200 478 - 4780 3006 Hoc Nghet 18.3 - 1830 733 - 7330 3007 Don Hung 31.2 - 3120 1248 - 12480 3008 Ke Sat 27.6 - 2760 1103 - 11030 3009 Tuan 4.4 - 440 175 - 1750 30010 Khe Du 8.5 - 850 341 - 3410 30011 Hon Mat 26.8 - 2680 1071 – 10710 30012 Rao Bang 19.6 - 1960 785 - 7850 30013 Khe Dua 15 - 1500 602 - 6020 300

325. From the above calculation results, comparing with QCVN 05: 2013 / BTNMT, it is shown that the average concentration of dust in the peak period in the subproject construction area due to excavation of rock and soil at all reservoirs exceed the permitted limit from 5.8 to 41.6 times. Therefore, it is necessary to take measures to minimize the impact of dust generated during excavation and embankment.

326. Impact level assessment: Medium and controllable negative impact.

e. Concentration of pollutants through transport of waste stone, soil

327. Applying the formula for calculating the concentration similar to the formula of concentration of pollutants due to the transport of materials we have the results of pollutants concentration through


the transport of stone and soil from soil pits and disposal areas as the following table:

Table 58: Concentration of pollutants through transport of rock and soil from soil pit and disposal areas


Type of pollutant

Concentration of pollutants in the air from the

center of the road x = 10m

(mg/m3)



(mg/m3)


1 La Nga

Dust 0.33 0.07 0.3SO2 0.0008 0.00015 0.35NOx 0.531 0.106 0.2CO 1,070 0.214 30

2 Thanh Thuy

Dust 0.41 0.08 0.3SO2 0.001 0.00019 0.35NOx 0.661 0.132 0.2CO 1,331 0.267 30

3 271

Dust 0.53 0.11 0.3SO2 0.0012 0.00024 0.35NOx 0.848 0.17 0.2CO 1,708 0.324 30

4 3/9

Dust 0.21 0.04 0.3SO2 0.0005 0.0001 0.35NOx 0.329 0.066 0.2CO 0.663 0.133 30

5 Khe Dung

Dust 0.27 0.06 0.3SO2 0.0006 0.00013 0.35NOx 0.44 0.088 0.2CO 0.886 0.177 30

6 Hoc Nghet

Dust 0.42 0.08 0.3SO2 0.001 0.00019 0.35NOx 0.674 0.135 0.2CO 1,358 0.272 30

7 Don Hung

Dust 0.72 0.14 0.3SO2 0.0017 0.00033 0.35NOx 1,148 0.23 0.2CO 2,312 0.463 30

8 Ke Sat

Dust 0.63 0.13 0.3SO2 0.0015 0.00029 0.35NOx 1,015 0.203 0.2CO 2,043 0.409 30

9 Dap Tuan

Dust 0.1 0.02 0.3SO2 0.0002 0.00005 0.35NOx 0.161 0.032 0.2CO 0.324 0.065 30

10 Khe Du

Dust 0.2 0.04 0.3SO2 0.0005 0.00009 0.35NOx 0.314 0.063 0.2CO 0.632 0.126 30

11 Hon Mat

Dust 0.62 0.12 0.3SO2 0.0014 0.00028 0.35NOx 0.986 0.197 0.2CO 1,985 0.397 30

12 Rao Bang Dust 0.45 0.09 0.3



Type of pollutant



(mg/m3)



(mg/m3)


SO2 0.001 0.00021 0.35NOx 0.722 0.145 0.2CO 1,454 0.291 30

13 Khe Dua

Dust 0.35 0.07 0.3SO2 0.0008 0.00016 0.35NOx 0.554 0.111 0.2CO 1,115 0.223 30

328. Through the above data table, it can be seen that at a distance of 10m, compared with QCVN 05: 2013 / BTNMT, the concentration of pollutants such as dust, NOx in reservoirs: 3/9; Khe Dung; Tuan, Khe Du is within the allowable limits. The remaining reservoirs are 1-2 times higher than the allowable limits; Concentrations of other pollutants such as SO2, CO, in all reserrvoirs are within the allowable limits. Therefore, appropriate mitigation and restriction measures are needed.

329. At the distance of 100m, compared to QCVN 05: 2013 / BTNMT, the concentration of pollutants such as NOx in reservoirs Don Hung and Ke Sat is higher than the permitted limit of 1 - 1.2 times. Concentration of other pollutants such as Dust; SO2, CO, in all reservoirs are within the allowable limits.

330. Impact assessment: Medium

f. Concentration of pollutants from the operation of construction machinery

331. From the volume of oil consumed in Table 7, the pollution coefficient (kg / ton of fuel) (*): TSP: 4.3; SO2: 20S (S = 0.25%); NOx: 65; CO: 10 according to WHO, Rapid Environmental Assessment, 1993, we calculate the concentration of pollutants from construction machinery operation as follows:

Table 59: Concentration of pollutants from the operation of construction machinery


Type of pollutant

Concentration of pollutants in the

air from the center of the road x = 10m

(mg/m3)


air from the center of the



1 La Nga

Dust 0.0025 0.0005 0.3SO2 <0.0001 <0.0001 0.35NOx 0.038 0.008 0.2CO 0.0059 0.0012 30

2 Thanh Thuy

Dust 0.0032 0.0006 0.3SO2 <0.0001 <0.0001 0.35NOx 0.048 0.01 0.2CO 0.0074 0.0015 30

3 271

Dust 0.0041 0.0008 0.3SO2 <0.0001 <0.0001 0.35NOx 0.062 0.012 0.2CO 0.0095 0.0019 30

4 3/9

Dust 0.0016 0.0003 0.3SO2 <0.0001 <0.0001 0.35NOx 0.024 0.005 0.2CO 0.0037 0.0007 30

5 Khe Dung Dust 0.0021 0.0004 0.3



Type of pollutant


air from the center of the road x = 10m

(mg/m3)


air from the center of the



SO2 <0.0001 <0.0001 0.35NOx 0.032 0.006 0.2CO 0.0049 0.001 30

6 Hoc Nghet

Dust 0.0032 0.0006 0.3SO2 <0.0001 <0.0001 0.35NOx 0.049 0.01 0.2CO 0.0075 0.0015 30

7 Don Hung

Dust 0.0055 0.0011 0.3SO2 <0.0001 <0.0001 0.35NOx 0.083 0.017 0.2CO 0.0128 0.0026 30

8 Ke Sat

Dust 0.0049 0.001 0.3SO2 <0.0001 <0.0001 0.35NOx 0.074 0.015 0.2CO 0.0113 0.0023 30

9 Dap Tuan

Dust 0.0008 0.0002 0.3SO2 <0.0001 <0.0001 0.35NOx 0.012 0.002 0.2CO 0.0018 0.0004 30

10 Khe Du

Dust 0.0015 0.0003 0.3SO2 <0.0001 <0.0001 0.35NOx 0.023 0.005 0.2CO 0.0035 0.0007 30

11 Hon Mat

Dust 0.0047 0.0009 0.3SO2 <0.0001 <0.0001 0.35NOx 0.072 0.014 0.2CO 0.011 0.0022 30

12 Rao Bang

Dust 0.0035 0.0007 0.3SO2 <0.0001 <0.0001 0.35NOx 0.052 0.01 0.2CO 0.0081 0.0016 30

13 Khe Dua

Dust 0.0027 0.0005 0.3SO2 <0.0001 <0.0001 0.35NOx 0.04 0.008 0.2CO 0.0062 0.0012 30

332. Through the above data table, we can see that at the distance of 10m and 100m, compared to QCVN 05: 2013 / BTNMT, the concentration of pollutants such as Dust, NOx, SO2, Co in all reservoir is lower than the limit for permission.

333. Impact assessment: small, fully controllable

g. Impact on water environment

(i) Source of impact

334. The following activities create waste or impact factors likely to affect water and sediment objects in the subproject area, including i) Overflowing rainwater with mud from construction site ii) wastewater from worker activities; iii) wastewater from concrete mixing activities; iv) Construction waste water.

(ii) Impact assessment


335. Domestic wastewater from worker camps includes wastewater from water used for preparing meals (Vna) and washing and cleaning (Vtg). Based on the criteria of using synthetic water based on per capita including water for drinking and living in rural residential areas according to "TCDXVN 33: 2006 Water supply - Pipeline network and design standards", water level used for living and eating is 80l / person / day and 80% of water used will be discharged into the environment (Item a, Clause 2, Article 39 of Decree No. 80/2014 / NDCP August 6, 2014 on drainage and wastewater treatment). Construction wastewater is generated by: Concrete mixing station; washing stones and sand; concrete maintenance, washing machinery. The amount of construction waste is generally not high, with the major polluted components of sand, stone, and cement, which are of low toxicity, easily deposited on the construction drainage route. Estimated construction wastewater is about 15m3 / month for Khe Du reservoir works.

336. Estimating the amount of wastewater in each site is shown in the table below:

Table 60: Estimates of sources of substances causing water contaminants

No.

Name of the reservoir Number of

workers (people)

Demand for water use (m3 / day)

Domestic wastewater

volume (m3 / day)

construction waste water

volume(m3 / day)

1 La Nga 25 2 1.6 0.832 Thanh Thuy 30 2.4 1.92 0.993 271 30 2.4 1.92 0.994 3/9 20 1.6 1.28 0.665 Khe Dung 25 2 1.6 0.836 Hoc Nghet 30 2.4 1.92 0.997 Don Hung 60 4.8 3.84 1.988 Ke Sat 55 4.4 3.52 1.829 Tuan 15 1.2 0.96 0.5

10 Khe Du 15 1.2 0.96 0.511 Hon Mat 35 2.8 2.24 1.1612 Rao Bang 30 2.4 1.92 0.9913 Khe Dua 25 2 1.6 0.83

Source: FS Report

Table 61: Concentration of pollutants of domestic wastewater during construction phase

No. Pollutant Unit ConcentrationQCVN

14:2008/BTNMTA B

1 BOD mg/L 300 ÷ 360 30 502 COD mg/L 480 ÷ 680 - -3 TSS mg/L 466.6 ÷ 966.6 50 1004 Total Nitơ mg/L 40 ÷ 80 - -5 Phospho mg/L 5.3 ÷ 26.7 6 106 Amoni mg/L 16 ÷ 32 5 107 Total Coliform MPN/100 mg/L 6.6.106÷ 6.6.109 3,000 5,0008 Fecal Coliform MPN/100 mg/L 6.6.105÷ 6.6.106 - -9 Helminth eggs MPN/100 mg/L 666.6 - -

Source: (*) - Technical Center for Urban and Industrial Zones - CEETIA, 2007

Table 62: Concentration of pollutants in construction waste water

No. Pollutant Unit Construction waste water (*)

QCVN 40:2011(column B)

1 pH - 6.99 5.5 ÷ 92 TSS mg/L 663.0 1003 COD mg/L 140.9 150


No. Pollutant Unit Construction waste water (*)

QCVN 40:2011(column B)

4 BOD5 mg/L 29.26 505 NH4

+ mg/L 9.6 106 Total N mg/L 29.27 407 Total P mg/L 4.25 68 Fe mg/L 0.72 59 Zn mg/L 0.004 3

10 Pb mg/L 0.055 0.511 As mg/L 0.05 0.112 Grease mg/L 0.02 1013 Coliform MPN/100mL 4.3.103 5,000

Source: (*) - Technical Center for Urban and Industrial Zones - CEETIA, 2007

337. Water environment can be polluted by wastewater containing high organic components arising from daily life, sediment, oil and grease in construction wastewater, rainwater running through the surface of the workplace to remove the dirt, rock, soil and other grease. Water parameters such as turbidity, suspended solids, nitrate, sulfate, BOD5, COD, total coliform will increase significantly and reduce water quality in reservoirs and downstream areas.

338. Domestic wastewater: Domestic wastewater in construction arises mainly due to the activities of workers on construction sites. Due to the characteristics of the location of the subproject construction sites, the workers camp will be located on the construction site. According to the above table, the volume of domestic wastewater (estimated at 80% of total water use) will not be much, but this type of wastewater will contain typical pollutants such as BOB, TSS, total Nito, total phosphorus, Coliform, fecal coliform, helminth eggs which are considered as the cause of disease transmission.

339. Construction wastewater: from the construction of main construction items such as dams, spillways. intake Due to construction conditions, it is necessary to apply measures embankment to prevent flow, lead the flow, therefore, will arise large amount of water at the foundation pit location, . almost have to pump continuously during construction, this is also considered construction waste water, because water has been contaminated by excavation and embankment: soil and stone, Can contain oil, grease, cement. Estimate the total volume is not much, only focus on the period of activities related to concrete. .

340. Stormwater runoff: The composition of stormwater runoff is very difficult to estimate and changable according to the time of rain, with high concentrations in the early stage of the rain. Pollution components in stormwater runoff at the construction phase are mostly natural stone components due to construction and a small amount of domestic waste scattered on the surface. Applying the formula to calculate erosion coefficient according to the formula of Wischmeier (Nguyen Van But (editor), 1997: Map of potential soil erosion in Vietnam (the mainland ratio of 1: 1,000,000). Institute of Geography, National Center for Natural Science and Technology, Hanoi, 40 pages):

100K= 2.1x10-4Mx1.14(12-OS) + 3.25(A-2) + 2.5(D-3)

- In which: K is the coefficient of soil erosion (%); M is the grain weight, defined (%) M = (% limon +% fine sand) (100% -% clay); OS is the content of soil organic matter (%); D is the coefficient of dependence on soil permeability; A is the coefficient depending on the shape, arrangement and type of soil structure.

- Based on the rainfall of the subproject area, the slope and the composition of soil and rock, applying the level of soil erosion without grasses for the excavation and embankment areas, the erosion coefficient is calculated as 0,18% (For soil group yellow red). Relatively forecasting the amount of potential eroded soil generated at the construction sites for La Nga reservoir: The total potential soil erosion during the construction process of La Nga reservoir (m3) = Total excavated volume Covering during the construction process of reservoir La Nga (m3) * K (0.18%) = 33.261 * 0.18% = 59.87 m3. Similar to the remaining reservoirs, we have the forecast results of potential soil erosion during the subproject construction process as


follows:

Table 63: Predict potential soil erosion due to rain from construction items of the subproject

No. Name of the reservoirExcavation and

embankment volume (m3)

The amount of potential soil erosion (m3)

1 La Nga 33,261 59.872 Thanh Thuy 41,377 74.483 271 53,091 95.564 3/9 20,614 37.115 Khe Dung 27,536 49.566 Hoc Nghet 42,202 75.967 Don Hung 143,765 258.788 Ke Sat 127,037 228.679 Tuan 10,071 18.13

10 Khe Du 19,634 35.3411 Hon Mat 61,711 111.0812 Rao Bang 45,208 81.3713 Khe Dua 34,658 62.38

341. Wastewater from grease, chemicals used in construction: Using chemicals to kill termites in the first stage, changing oil, washing machinery and equipment on site .... The area for washing and cleaning machines and equipment on site of the project is located near the entrance of the project. Wastewater from this area arises mainly: Waste oil from periodic oil change; Water for vehicle maintenance and car washing; Solid waste contains oil from the operation of motorcycles and maintenance activities ...

Table 64: Flow and load of pollutants in wastewater from construction equipment

No. Type of waste waterFlow

(m3/ngày)COD(mg/l)

Grease (mg/l)

TSS(mg/l)

1 Wastewater from machinery maintenance activities

0.5 20 ÷ 30 - 50 ÷ 80

2 Waste water from machine cleaning operations

1.5 50 ÷ 80 1,0 ÷2,0 150 ÷200

3 Wastewater from machine cooling water

1 10 ÷ 20 0.5 ÷ 1.0 10 ÷ 15

Total 3 30 ÷ 49 0.6 ÷ 1,3 81 ÷ 124QCVN 40:2011/BTNMT, Column A 50 5 50QCVN 40:2011/BTNMT, Column B 100 10 100

342. Hazardous waste generated during construction of reservoir items under the subproject originated from maintenance of transport vehicles. Norms of waste oil emission of cars are 4 times/year and 18l/time/car, average construction period of each reservoir is 12 months and the average vehicle number is 6 cars/reservoir. Accordingly, the total amount of hazardous waste generated from maintenance of machinery during the construction period of the subproject is 432 liters of waste oil. If this amount of waste is not collected and treated, it will seriously affect the receiving area due to toxic substances from waste oil.

(iii) Impact assessment: Average negative impacts and can be controlled

343. Subjects mainly affected by water pollutants in the area where the works are under the subproject will be the surrounding water bodies and soil environment. However, according to the field survey results, the area around the reservoirs does not have ponds, lakes and rivers flowing through. However, the construction works are located in areas with a certain slope. Wastewater from camps affects the area around the camp site. This is an unoccupied area under the management of CPCs, so the direct impacts are very small, however, this is a source of disease and communicable diseases from


workers. Wastewater from construction activities, and from construction equipment maintenance activities on works (if any) affect only within the construction site. Appropriate control measures are required.

b. Impact of solid waste

(i) Source of impact:

344. Solid waste from construction activities of works under the subproject is generated mainly from: i) waste soil and stone from excavation and embankment and construction activities; ii) waste from worker activity; iii) hazardous waste from related activities.

(ii) Impact assessment:

345. The volume of solid waste generated depends strictly on the volume of excavation and embankment on the construction site, the number of workers to be mobilized on sites, construction management, construction skills of workers on sites. Total construction waste and domestic waste generated from construction activities of the subproject are estimated in the table follow:

Table 65: Estimated volume of excavation, embankment and domestic waste generated from subproject construction activities

No. Name of the reservoirVolume waste soil

and stone to be dumped (m3 )

Volume of solid waste (kg/month)

1 La Nga 703 6002 Thanh Thuy 1.052 7203 271 1.218 7204 3/9 976 4805 Khe Dung 912 6006 Hoc Nghet 998 7207 Don Hung 1.601 14408 Ke Sat 2.009 13209 Tuan 508 360

10 Khe Du 889 36011 Hon Mat 1.208 84012 Rao Bang 1.207 72013 Khe Dua 901 600

Source: FS Report

346. According to the above table, the volume of excavated soil that cannot be reused on construction site, needs to be transported and disposed is very little for each construction item, this amount of waste is mainly generated in the first phase of construction works. The estimated monthly domestic waste is not much, however, the calculated volume is applicable to the number of workers mobilized on site at peak times, while the actual number of workers required daily on construction will be less.

347. For hazardous wastes (HWs): According to statistical results, the volume of hazardous waste generated mainly in the subproject construction phase includes waste metals, oil-contaminated solid wastes, paint sludge, ... The impacts of hazardous solid waste are assessed at high level and probability of occurrence. However, because the volume generated from the subproject construction is not large and the strict implementation of hazardous solid waste management measures, the probability of impacts is limited to the lowest level. In addition, according to the design plan, the use of termite chemicals will be carried out at all the subproject sites. Accordingly, Metavina 10DP is expected to be used, and if it is not well managed, there will be risks of water and soil pollution around the construction sites.

(iii) Impact assessment: Average negative impacts

348. Subjects receiving impacts from solid waste are mainly soil, water, air and public health environments. However, according to the survey results, the area around the sub-project does not have


water bodies, rivers and streams that may be affected by generated solid waste. The impact on groundwater quality requires a long-term osmosis period and a larger amount of arising. For the air environment, some toxic odors and gases (mainly H2S) can be created, however, with airy conditions, these toxic gases are easy to dilute to the threshold of no impact. For public health, the survey results also show that there are no household living within 1000m from the construction site. Therefore, it mainly affects workers and officials on the construction site. The dispersal of solid waste of different types will have cumulative effects on other activities in the region over time that may cause flow congestion or unsanitary environment, requiring appropriate management measures.

c. Impact on surrounding agricultural cultivation areas


349. Areas of surrounding agricultural land will be affected by: i) mud flow arises due to erosion in the construction area when there is rain; ii) Excavated soil and embankment soil, stone, construction materials spilled out of the works; iii) Waste disposal activities are not well managed; iv) operating at land mines causing spillage of soil to surrounding areas.


350. Mud flow is generated by erosion at the construction site of the main dam, spillway and some management road sections. It is estimated that in the rainy season, the potential eroded soil volume per meter of construction foundation is forecasted to be: 0.37m3. This amount of soil has been liquefied by rain, easily overflowing to the low areas around the structures. Potential impacts during soil excavation and embankment (about 12 months for each construction site) mostly happen in heavy rain period (September-December).

351. In addition, as calculated in the design dossier of the subproject, most of the excavated soil will be reused for the foundation embankment. Therefore, the amount of excavated soil will need to be gathered on the construction site before being implemented for the purpose of backfilling. If this activity is not well managed, there will be a risk of spilling into the surrounding areas affecting the farming activities of households close to the construction site.

352. In addition, the area of agricultural land around the disposal area and the soil pit area will also be affected if measures to manage soil spills are not well implemented.

(iii) Impact assessment: Medium negative impacts: Since all construction works in the subproject are located in the agricultural cultivation area, the impact on this activity may occur, however, the level of impact is not significant because: i) According to the results of the field survey, the areas surrounding agricultural land are mainly cultivated with coffee and fruit trees, so the impact of soil and rock dumping from the construction site will be limited, the cultivation area of wet rice, maize and crops is quite far from the construction works; ii) The area of construction works with a temporary ground, arranged around the construction area are mainly the land managed by the People's Committees of communes, so the activities are less likely to exceed the boundary of site clearance of the construction site; iii) According to the estimate, most of excavated soil will be used for filling, so the volume of waste soil and the need for additional soil will be very small, besides, unused soil will be disposed in many different disposal areas, therefore, the size of the disposal area will be very small, quite similar to the land exploitation activity carried out at many different pits, which are close to construction sites.

d. Impact due to dumping soil and stone


353. Waste excavated soil stone types that must not be used on construction sites are gathered at regional disposal areas.


354. Waste stone and soil are organic soil and plant roots arising from the excavation of road and soil generated from soft soil treatment areas. The type of soil and rock that does not meet the material requirements of the subproject should be removed and contains no harmful ingredients. This is a good source of materials that can be used to level the civil areas without high requirements on the base material. Like excavation, embankment and material transportation, in addition to the impacts arising


during the transportation process, waste soil in the construction areas can also spill into adjacent areas causing the situation to be buried or muddy.

Impact assessment: Small negative impact. The impact from this activity is assessed as small due to: i) The excavated soil and embankment soil that needs to be dumped is organic soil with no toxic ingredients; ii) The amount of soil to be dumped is small; iii) scattered waste disposal activities in many different locations; iv) The area of planned disposal sites is the vacant land under the management of the Commune People's Committee or land of some households wishing to level up; v) The vegetation in these areas is only grass and shrubs and flora and fauna, no rare species need to be preserved.

5.3.2.3. Source of impact unrelated to waste

a. Impact due to noise and vibration

(i) Source of impacts

355. Noise, vibration is generated from construction activities on site; transportation of materials; construction machines

(ii) Impact evaluation

356. Machine operators and workers on site are directly affected by noise and vibration caused by construction machine and equipment. Residential community around the road will be affected by the transportation vehicles.. Noise pollution and vibration affect both health and human behavior. Unwanted sound (noise) causes bad impact on mental health. Noise pollution can cause hypertension, stress, tinnitus, hearing loss, sleep disorders and other harms.

Impact by noise

357. Noise is the noise level emitted from machines and equipment within 1.5 ÷ 2m from noise sources. The typical noise standards of vehicles and construction equipment of the "US Environmental Protection Committee - The noise from NJID, 300.1 construction equipment and construction machinery, December 31, 1971" is the basis for control the noise level from operating machinery and noise activities. Comparing with construction activities, and construction equipment mobilized on site, noise level at source arising from sub-project construction activities is according to the following table:

Table 66: Calculation results of noise level at source during construction phase

No. Machine name / Capacity Noise at 1.5m source (dBA)

Laeq Average1 Hand drill set 85 ÷ 88 872 Crane 10 ton 87 ÷ 90 893 Crane 6 ton 75 ÷ 80 784 Steam wheel crane 16 ton 88 ÷ 94 915 Steam wheel crane 6 ton 87 ÷ 89 886 Tower crane 25T 78 ÷ 81 807 Table vibrator 1Kw 80 ÷ 87 848 Puncher 3.5 KW 85 ÷ 88 879 Concrete pump 10 m3/h 76 ÷ 81 79

10 Concrete pump BT 50m3/h 85 ÷ 89 8711 Grout pump 40KW 78 ÷ 79 7912 brick breakers 82 ÷ 83 8313 Backhoe excavator 1.25m3 79 ÷ 82 8114 Welding machine 23KW 80 ÷ 83 82


No. Machine name / Capacity Noise at 1.5m source (dBA)

Laeq Average15 Drilling machine 4.5KW 80 ÷ 85 8316 Portable rock drill f42mm 85 ÷ 89 8717 Drilling jumbo fl05 86 ÷ 87 8718 Drilling jumbo f76mm 76 ÷ 81 7919 Elevator hydraulic 75 ÷ 80 78

20 Air compressor 1200m3/h 84 ÷ 88 86

21 Air compressor 600m3/h 83 ÷ 87 85

22 Generator (500KVA) 82 ÷ 86 84

23 25m3 concrete mixer 84 ÷ 88 86

24 Bulldozer ≤110Cv 82 ÷ 87 8525 Bulldozer ≤ 140Cv 82 ÷ 86 8426 Backhoe excavator 1.25m3 80 ÷ 84 8227 Betonite Circulation Mixing Tank 750 lít 81 ÷ 85 83

QCCP(1) 85

QCCP(2) 70dBA (6h-21h);55dBA (21h-6h)Note: QCCP (1) - Permissible standard according to QCVN 24/2016 / BYT - National technical regulation on noise - Permissible noise exposure level at the workplace; QCCP (2) - Permissible standards according to QCVN 26: 2010 / BTNMT - National technical regulation on noise

358. Noise spread from the operation of vehicles, machinery and equipment participating in project activities to surrounding areas is determined by the following formula:

Li = Lp - Ld - Lc (dBA)

Where:

Li - Noise level at the point of calculation how the source of noise a distance d (m)

Lp - Noise level measured at noise source (1.5 m away)

Ld - Noise level decreases with distance D at frequency i:

r1 - Distance to source causing noise with Lp (m)

r2 - Distance to calculate the noise level reduction by distance corresponding to Li (m))

a - Specific absorption coefficient of noise with ground terrain (A - )

Lc - Noise reduction through obstructions. The subproject area has a wide open terrain and no obstructions, so L=0.

359. From the calculation formula with specific conditions, the noise spread and noise pollution scope from noise equipment involved in the construction of the project can be specified. The results of calculating the noise spread forecast according to the forecast model are determined with the highest level of pollution when the noise sources are simultaneously presented in the table:

Table 67: Forecast of noise reduction according to distance from source


No. Machine name / CapacityNoise at 1.5m source (dBA)

10m 20m 30m 40m 50m

1 Hand drill set 70 64 61 58 562 Crane 10 ton 72 66 63 60 583 Crane 16 ton 61 55 52 49 474 Crane 25 ton 69 63 60 57 555 Steam wheel crane 16 ton 75 69 65 63 616 Crawler crane 16 ton 72 66 62 60 587 Tower crane 25 ton 63 57 54 51 498 Table vibrator 1Kw 67 61 58 55 539 Puncher 3.5 KW 70 64 61 58 56

10 Concrete pump 10 m3/h 62 56 53 50 4811 Concrete pump BT 50m3/h 71 65 61 59 5712 Grout pump 40KW 62 56 53 50 4813 brick breakers 66 60 57 54 5214 Backhoe excavator 1.25m3 64 58 55 52 5015 Welding machine 23KW 65 59 56 53 5116 Drilling machine 4.5KW 66 60 57 54 5217 Portable rock drill f42mm 71 65 61 59 5718 Drilling jumbo fl05 70 64 61 58 5619 Drilling jumbo f76mm 62 56 53 50 4820 Elevator hydraulic 61 55 52 49 4721 Air compressor 1200m3/h 70 64 60 58 5622 Air compressor 600m3/h 69 63 59 57 5523 Air compressor 600m3/h 68 62 58 56 5424 250 Liter concrete mixer 69 63 60 57 5525 Bulldozer ≤110Cv 68 62 59 56 5426 Bulldozer ≤ 140Cv 67 61 58 55 5327 Backhoe excavator 1.25m3 66 60 56 54 5228 Betonite Circulation Mixing Tank

750 lít 66 60 57 54 52

Medium 67 61 58 55 53Resonance 79,2 75,7 73,2 71,2 65,2

QCCP(1) 85QCCP(2) 70dBA (6h-21h);55dBA (21h-6h)

Note: QCCP (1) - Permissible standards according to QCVN 24/2016 / BYT - National technical regulation on noise - Permissible noise exposure level at work place, QCCP (2) - Standard allowed according to QCVN 26: 2010 / BTNMT - National technical regulation on noise

360. With these values, comparing with QCVN 24: 2016 / BYT - National technical regulations on noise, it is shown that all types of noise-controlled equipment include: types of earth construction machines (excavator, crane, backhoe ...); types of compactors, piling, drilling machines, chisels….

361. The equipment noise spread is within the permitted limit according to QCVN 26: 2010 / BTNMT - National technical regulation on noise at a distance greater than 10m from the source location. Impact assessment: Report on Environmental and Social Impact Assessment (ESIA) 154

Moderate negative impacts, controllable. However, high resonance noise level (distance <40m) can affect cardiovascular, workers’ exposure to noise within 8 hours / day or older workers, children passing through construction areas may be affected on the health by the noise of the subproject activities. Therefore, there should be measures to minimize noise and vibration for this subproject.

With the above assessment results, the noise from operating construction equipment has a low to moderate impact on the surrounding environment. However, due to frequent and prolonged impacts along with the operation time of equipment in construction, the impacts on health of workers who are often on site and directly implement the construction activities is very significant when it requires frequent and long-term exposure. The negative impacts of noise on workers' health on construction sites depend on the level and time exposure to noise. It is possible to list the main impacts of noise on public health as follows:

- Noise affecting sleep: Sleep is often awakened when there are unexpected noises, people will not have a good sense of sleep when there is a regular noise disturbing next to them. It will greatly affect to the health and productivity of the next day, people will feel sluggish, tired, not alert to be ready for the work of a new day.

- Noise affecting health: Too much exposure to noise will create a very heavy psychology for the human body, directly affect hearing, causing hearing loss, oocupational deafness, persistent headache, physiological disorders, pathology and neurological, cardiovascular and endocrine disorders, ... At this time, people are often tired, irritable, memory loss, tremor of eyelids and Osteoarthritis reflexes. The stronger noise (120dB or more) can cause jarring, earache, and even eardrum perforation.

- Noise affecting productivity and working efficiency: working in a noise environment will significantly reduce the concentration of workers and the accuracy of the work, increase errors in work and production, generate or increase labor accidents. In fact, labor productivity will decrease from 20 ÷ 40%

- Noise affecting information exchange: Information is often disturbed by noise, obscuring, making it more difficult to receive information, the low accuracy of information received will affect the living production of human activities.

Significant noise impacts on health depend on noise levels when long-term exposure is assessed, including:

- Noise of 50dB: degrades working performance, especially for intellectual workers.

- Noise of 70dB: increases heart rate and breathing rate, increases body temperature and increases blood pressure, affects stomach activity and reduces labor interest.

- Noise of 90dB: causing fatigue, insomnia, hearing loss, body imbalance and nervous breakdown.

- In order to minimize the impacts on the community's health in the project area and especially for workers on site during the construction process, the project owner applies management and technical measures, reasonable construction arrangement.

Impact due to vibration

362. Same as noise, vibration depends on many factors such as equipment condition, construction conditions and measures, so that there are no adequate studies on vibrations of construction activities at present. Therefore, we use the vibration standard for all kinds of vehicles and construction equipment of the "US Environmental Protection Committee - Noise from construction equipment and NJID construction equipment, 300.1, December 31, 1971" on the vibration level at the source, as well as using the waveform vibration propagation forecasting model like the above noise with appropriate adjustment factor to serve as a basis for evaluation for construction:

Table 68: Vibration level decreases with the distance in construction


No. Machine name / Capacity

Vibration at the source (dBA)

Spread vibrations with distance

Vibration at the source (dBA) Spread vibrations with distance

LVeq 1,5m 5m 10m 20m 50m

1 Hand drill set 76 ÷ 79 77,5 64,0 58,0 52,0 42,02 Crane 10 ton 78 ÷ 81 79,5 66,0 60,0 54,0 44,03 Crane 16 ton 78 ÷ 80 79,0 65,5 59,5 53,5 43,54 Crane 25 ton 66 ÷ 69 67,5 54,0 48,0 42,0 32,05 Steam wheel crane 16

ton 66 ÷ 72 69,0 55,5 49,5 43,5 33,5

6 16T crawler crane 66 ÷ 68 67,0 53,5 47,5 41,5 31,57 Tower crane 25T 70 ÷ 73 71,5 58,0 52,0 46,0 36,08 Table vibrator 1Kw 72 ÷ 78 75,0 61,5 55,5 49,5 39,59 Puncher 3.5 KW 76 ÷ 79 77,5 64,0 58,0 52,0 42,010 Concrete pump 10 m3/h 59 ÷ 64 61,5 48,0 42,0 36,0 26,011 Concrete pump BT

50m3/h 67 ÷ 71 69,0 55,5 49,5 43,5 33,5

12 Grout pump 40KW 61 ÷ 62 61,5 48,0 42,0 36,0 26,013 brick breakers 65 ÷ 66 65,5 52,0 46,0 40,0 30,014 Backhoe excavator

1.25m3 66 ÷ 69 67,5 54,0 48,0 42,0 32,0

15 Welding machine 23KW 73 ÷ 76 74,5 61,0 55,0 49,0 39,0

16 Drilling machine 4.5KW 73 ÷ 78 75,5 62,0 56,0 50,0 40,0

17 Portable rock drill f42mm 77 ÷ 81 79,0 65,5 59,5 53,5 43,5

18 Drilling jumbo fl05 72 ÷ 73 72,5 59,0 53,0 47,0 37,019 Drilling jumbo f76mm 63 ÷ 68 65,5 52,0 46,0 40,0 30,020 Elevator hydraulic 63 ÷ 67 65,0 51,5 45,5 39,5 29,521 Air compressor

1200m3/h 72 ÷ 75 73,3 59,8 53,8 47,8 37,8

22 Air compressor 600m3/h 71 ÷ 74 72,3 58,8 52,8 46,8 36,8

23 Air compressor 600m3/h 79 ÷ 73 71,5 58,0 52,0 46,0 36,0

24 250 Liter concrete mixer 69 ÷ 73 71,3 57,8 51,8 45,8 35,8

25 Bulldozer ≤110Cv 68 ÷ 72 70,3 56,8 50,8 44,8 34,826

Bulldozer ≤ 140Cv 68 ÷ 72 70,3 56,8 50,8 44,8 34,8

27 Backhoe excavator 1.25m3 68 ÷ 71 69,3 55,8 49,8 43,8 33,8

28 Betonite Circulation Mixing Tank 750 lít 67 ÷ 70 68,3 54,8 48,8 42,8 32,8

Min 61,5 48,0 42,0 36,0 26,0Max 79,5 66,0 60,0 54,0 44,0

Ever. 71,0 57,5 51,5 45,5 35,5


No. Machine name / Capacity

Vibration at the source (dBA)

Spread vibrations with distance

Vibration at the source (dBA) Spread vibrations with distance

LVeq 1,5m 5m 10m 20m 50m

∑Lv 90,3 76,8 70,8 64,8 54,8Note: QCCP - Permissible standard according to QCVN 27: 2010 / BTNMT - National technical regulation on vibration

363. With these values, when compared with QCVN 27: 2010 / BTNMT - National technical regulation on vibration, it is shown that the types of vibration-controlled equipment include: earth construction machines (excavators, crane, excavator ...); types of compactors, piling, drilling machines, chisels ....

364. The average equivalent vibration level at the source of the average construction equipment of all devices is about 59dB, the total vibration level near the source is about 81.0dB. The spread of vibration of devices with values within the permitted limits according to QCVN 27: 2010 / BTNMT - National technical regulation on vibration at a distance of less than 5m from the source location.

365. Impact assessment: Direct objects affected by vibration due to construction machines and equipment on construction sites, means of transport are workers using machines and construction workers. The transport vehicles passing through residential areas will have vibrations impact to the residential community around the roads. On the other hand, vibration also affects the animal system around the project. The main impacts of vibration include:

- Low intensity and short vibration has a good effect such as increasing muscle strength, reducing fatigue, ...

- High intensity and long-term vibration cause discomfort to the body. The low frequency but the large amplitude vibrations often causes shaking, the greater the amplitude is, the stronger the shaking is. Specifically: Changing the activity of the heart, causing displacement of internal organs in the abdomen, disturbing the activity of male and female gonads. Prolonged shaking and vibration can alter the functioning of the thyroid gland, shock the vestibular organs and disturb the function of the body's balance. Vibrations associated with noise make the hearing organ become too tired to cause occupational deafness. Long-term vibrations cause diseases of the bones and joints, causing inflammation of the bone and joint systems. Especially under certain conditions, it may cause occupational vibration disease. For women, working in conditions of high vibration will cause the uterus to migrate to infertility. During menstruation, if vibrating and shaking a lot, it will cause blood stasis in the uterus.

366. Impact assessment: It is the average negative impact, can be controlled. According to the above analysis results, the vibration parameters are lower than the permitted limits of QCVN 27: 2010 / BTNMT - National technical regulation on vibration and QCVN 24: 2016 / BTNMT - National technical regulation about noise at a distance of > 10m. However, measures should be taken to minimize the impact of vibration.

(iii) Evaluate the impact of noise and vibration: These are the average negative impacts, can be controlled. On the basis of the assessment results, the project area is significantly away from the surrounding residential areas, and without the architectural works. Therefore, the impacts of vibration on the environment are not much. However, vibrating from operating the equipment is likely to directly affect workers on the construction site and especially those who directly control the construction equipment and facilities of the project.

b. Impacts due to gathering workers

(i) Source of impacts:

367. Workers' activities on the construction site, with the average mobilization period of about 10-12 months/site, up to 55-60 workers at peak time (Don Hung, Ke Sat reservoir) will give rise to related issues such as conflicts, insecurity of the community order, arising of infectious diseases ...Report on Environmental and Social Impact Assessment (ESIA) 157

(ii) Impact evaluation:

368. The risk of spreading diseases: due to poor sanitation in temporary houses and the camping area in the construction area will lead to diseases such as dengue fever, eye disease ... of workers, then spreading widely to surrounding residential areas. In addition, there is the possibility of spreading social diseases such as HIV / AIDS by other local workers and vice versa, infected workers from local residents.

369. Conflict arises: Conflicts may occur between local people and migrant workers due to cultural differences, lifestyles, voices, regions. In particular, in the local community of the sub-project area, some Catholics, Protestants, and Buddhists should have their own beliefs compared to workers and non-religious people, so if workers are not managed, it will cause some conflicts. In addition, collisions and disputes over materials, property theft of local people and businesses, damage to materials and equipment, crops ... are the causes of disputes and conflicts, destabilizing local order.

(iii) Impact assessment: Average negative impact

370. The arising impacts are assessed as average due to: i) the demand for workers concentrated at construction sites is not large, and in a short period of time; ii) The construction site is located relatively isolated, away from the concentrated residential areas; iii) The contractor has plans to use some local sources of labor.

c. Disruption and dispute of irrigation water sources due to construction


371. Temporary closure of reservoirs during construction.


372. This may happen during the construction process. In such a situation, there will be disputes or dissatisfaction when the convenient place to collect water varies among the households.. This should have the commitment among households in the village meetings, and disseminate in advance. However, in addition to the main source of water taken from irrigation reservoirs, households can take water from a lot of water sources, from other irrigation lakes or flow diversion to ensure additional irrigation water during the contruction period.

373. Water for drinking and domestic use is taken from groundwater in dug wells and drilled wells, so the water cut for construction of dams does not affect the water resources of people in the project area.

374. Project objectives are to strengthen the capacity of local relevant agencies to manage and implement Dam upgrading, encourage participation, increase knowledge and understanding of repair management and facilitate equal cooperation between benefiting users and local authorities and management agencies. This will help local people and communities develop collective water management mechanisms to avoid possible conflicts between stakeholders and minimize potential and immediate impacts. In particular, there may be a conflict between a irrigation company (or a local irrigation officer) with people using irrigation water when there is a deviation in the water supply plan. Or it is a conflict among people using water, especially watershed households when water is supplied unstably and unfairly.

Table 69: Benefitted area and the number of households can be affected due to interruption of irrigation water supply during subproject construction

No. Name of the reservoir Number of households (households)

Area of downstream is protected (ha)

1 La Nga 400 10002 Thanh Thuy 380 8003 271 24 6004 3/9 15 2005 Khe Dung 11 2006 Hoc Nghet 20 6007 Don Hung 11 100


No. Name of the reservoir Number of households (households)

Area of downstream is protected (ha)

8 Ke Sat 20 3009 Tuan 24 55010 Khe Du 20 50011 Hon Mat 15 20012 Rao Bang 20 5013 Khe Dua 18 150

Total 978 5,250

Source: * from the subproject screening papers

(iii) Impact assessment: small negative impact

375. According to the technical design, auxiliary bank method will be applied, so the water supply is maintained at a minimum level to ensure production. Construction of the culvert that disrupts the flow will be provided with an alternative flow, so the damage caused by the interruption of irrigation water for agriculture is well controlled.

d. Impact on traffic and traffic safety issues


376. The following activities may affect road traffic activities, including: iii) construction activities at the reservoirs; ii) Transporting materials across National highways, provincial roads and local roads causing slippery and damage to community utilities;


377. Interfering with commuting activities of the community: Currently the dams of some reservoirs in the subproject are roads for people moving in the area: reservoir 3/9 (Approximately 20-30 turns passing by 1 day); reservoir Khe Dung (About 10-15 turns of people passing by 1 day); reservoir Thanh Thuy (about 30-35 turns of people going back 1 day); reservoir Hon Mat (Approximately 15-20 turns of people passing by 1 day). Therefore, when constructing the pavement again, it will directly affect the travel of people on this road. Therefore, the subproject owner will have measures to regulate traffic reasonably so that people can still use the road during construction.

378. The risk of traffic collisions on transport routes: Vehicles carrying materials and waste from material mines / yards and construction areas will lead to soil sticking on the tires. Spilled soil on the road will generate dust and will also liquefy with water. Liquefied mud on the road surface creates slippery conditions and increases the risk of traffic insecurity. In addition, the increase in means of transport on inter-village and inter-commune roads creates a great risk of traffic collisions between the subproject vehicles and the local community's vehicles.

379. Damage and degradation of roads: According to calculations in the design dossier, the roads for transportation activities are national highways, district roads, inter-village roads. For inter-village roads, the transport distance varies from 900m to 3km, currently the roads are in very low loading capacity, easily affected by the operation of large transport vehicles.

(iii) Impact assessment: Negative impacts are moderate and can be controlled through an appropriate impact management plan.

380. According to the survey results, the structures under the subproject are located in remote areas, the roads are very limited. So the local community is using operating route and the main dam, spillway at the construction works as internal roads, so the construction on these locations will hinder the travel needs of the community, it is necessary to have appropriate traffic management measures.

381. In addition, it is expected that some inter-village roads will be used as transport roads, currently these roads are at very low loading capacity, the increase in the operation of vehicles with large loads will cause degradation of the road surface and disruption of cross-over drainage culverts, irrigation ditches along the edge of the road. There is a need to assess the initial status, commitment between project owners, contractors and local authorities.


e. Impact on graves, cultural heritage and public works


382. There are no any tombs built around the existing construction site around the subproject area. Besides the subproject with a radius of 3 km, there is absolutely no cultural heritage, so the construction does not affect the graves and surrounding cultural heritages.

383. In the process of soil excavation and embankment, it is possible to detect artifacts, cultural heritage or graves. In that case, the progress of the project will be affected and the involved parties must take action. Therefore, it is necessary to have a procedure to handle the object detected in the construction process of the subproject.

384. During construction, the number of vehicles operating at such a peak time may cause degradation of inter-village roads and soil roads on the dam surface.

385. Transporting construction materials and machinery can cause subsidence and cracking road. Construction process should take measures to protect transportation routes.

386. Detection of artifacts: In soil excavation and embankment activities, it can find physical cultural heritage under the ground. However, these structures are located along the reservoir with long-term cultivation activities. These areas have been studied and confirmed that they are not archaeological sites, so the probability of finding artifacts is very low.

(ii) Overall assessment of impacts of detecting graves, cultural heritage and public works: Small.

f. Impact on livelihood and business activities by the construction

387. Construction activities may disrupt water supply for production and business activities of some households. According to the survey, some households are on the road to the dam, there are many small traders but this is not their main source of income. However, to minimize and limit impacts, project owner will work closely with the local authorities to assess the impact level to have appropriate support. In addition, during the construction process, contractors plan and organize construction to minimize the impact on these affected households. Local authorities make compensation and support in accordance with the policies stated in the RAP to ensure not to worsen the livelihood and business status of AHs.

100% of people said that they were concerned about the environmental impact due to transportation of soil and construction materials which could make the environment dusty. People also worry that many migrant workers will break the quiet environment of the countryside and can cause security problems such as theft. Therefore, it is assessed as average negative impact and can be managed through appropriate mitigation plans.

g. Labor insecurity for workers, sickness incidents


388. Operating equipment and machines, performing construction activities on sites and camp conditions. Disease sources in the subproject area, flood and natural disasters…

(ii) Impact analysis

389. A number of machinery and equipment will be mobilized on the construction site, so the operation of machinery and equipment will cause the risk of labor safety for workers. Electric shock accident may happen when there are electrical leakage or unsafe electrical management on site. In addition, workers’ health will be affected, there will have many types of illnesses due to unsafe accommodation conditions, no periodic health care or disease broken out in the subproject area.

(iii) Impact assessment: Average negative impact

390. The medium impact of equipment mobilized on site is not super long, super heavy or easy to operate. However, it is necessary to strictly follow the labor safety measures proposed during the subproject construction phase to ensure safety for workers and local communities and rapid response mechanisms when there are risks of labor insecurity.

h. Impact on gender equality and children


391. The subproject investment will mainly affect the environment during construction, due to material transport and machinery equipment noise,…In addition, when participating in the construction, workers moving from other places can also bring diseases and their activities may break the tradition and local regulations. Women are at high risk of HIV / AIDS infection, traffic safety. In addition, poor women and women-headed households in the project area are also at risk of damage to economic assets due to water cut during construction.

392. During construction in 4 reservoirs: Thanh Thuy, Khe Dung, 3/9, Hon Mat, the dam surfaces are also traffic roads between hamlets or road to farm. At night, women and children are at risk of accidents caused by the construction site or poor management of workers can lead to incidents such as teasing or rape. Moreover, gender violence can also occur during the subproject implementation as there will be a number of female workers. Roads will be more difficult and dusty in the rainy season, it can affect the psychology of children who are afraid to go to school and is the cause of children leaving school, so the contractor has plan to carry out the construction mainly in the dry season.

393. In the construction process, active children are always concentrated around the construction site, which can cause occupational accidents. Especially, the lakes are deep, it is easy to drown for children. There are also risks if the contractor hires child labor, resulting in a violation of the Vietnamese labor law. Therefore, there must be a safety policy for children, protection of children's rights, not allowing children to sell goods or provide services around the lrepairing and upgrading reservoir areas.

394. According to survey data of households in the subproject area regarding family activities: women do most of child care / children; cleaning the house; cooking / housework. Up to 89.6% of women go to the market, buy things and food for the family, and women also do the care of the elderly, young children, care for children (76.1%). These jobs take a lot of time for women so they have less time to perform other activities such as participating in social activities, learning to improve themselves making decision on the important issue of the family. The majority of households agreed that both husband and wife together decide and do important issues in the family (purchasing valuable assets, weddings, kinship, village, etc.) accounting for 62.2%. Men do the hired jobs (45.8%) and women only account for 11.1%. It is observed that inspite of the WB’s support for women to have equal participation in the subproject activities, it is difficult to have their participation because it depends on their housework and decision of male headed

395. However, the subproject activities do not cause disruption of water supply, these impacts are considered small due to the short construction period, are not considered as cumulative impacts, causing long-term harm to local life.

396. Impact assessment: small

i. Impact due to raw material exploitation


397. Due to the exploitation of embankment soil under the subproject, This activity is carried out in 8 surrounding mines.

(ii) Impact analysis

398. The proposed land mines for construction works are defined in Section 2.2.2 of this report. However, according to calculations, the demand for land for each works is very few. The necessary procedures for taking soil at these mines have been implemented. Activities of soil exploitation at soil mines will cause some impacts on the environment such as affecting the surrounding agricultural land, breaking environmental landscape, losing vegetation cover ....

(iii) Impact assessment: small

399. The impact of construction material exploitation is very low, due to the following reasons: i) most of the materials purchased, only the fill soil will be taken from the local mines; ii) the need for filling soil in very small lakes, most of the mines are located around the lake; iii) vegetation in these areas is only grass and shrubs and flora and fauna, no rare species need to be preserved; iv) The location of those mines is under the management of the CPC, away from the agricultural cultivation areas of the community.


j. Impacts on the ecosystem

400. The subproject activities generate wastes that are likely to affect aquatic ecosystems including: waste oil, oil-containing wastes, construction wastewater and domestic wastewater..

- Waste oil and oil-containing waste is a kind of hazardous waste. If waste oil spills occur, although the probability is not large or more likely to occur, disperse oil-containing rags and especially oil-containing wastewater into the water environment near the construction site, affecting submerged ecosystems. Aquatic ecosystems may be choking due to lack of oxygen or poisoning. Waste oil is also a source of toxicity to aquatic organisms in the water. Through the food chain, oil will accumulate from low-level organisms (algae, phytoplankton) to high-level organisms (aquatic species, fish ...).

- Some construction sites, where workers are concentrated (over 50 people), domestic wastewater has concentrations of BOD5, COD and TSS exceeding Cmax according to QCVN14: 2008 / BTNMT with coefficient K = 1.2 for producing establishments less than 500 people discharging into water sources many times Type B according to QCVN 08: 2008 / BTNMT. Solid waste components have many biodegradable organic substances (leftovers) and difficult to decompose (shells, plastic).

- Solid wastes and domestic wastewater are common wastes and will be collected and treated according to Decree 59/2007 / ND-CP on solid waste management. However, if these wastes are allowed to enter surface water sources, it will not only pollute organic matter but also floating objects. Water areas where waste is contaminated are at risk of being eutrophic, toxic or dead to aquatic ecosystems.

- Especially in the construction process, the withdrawal of water for construction of items will affect aquatic ecosystems in the lake. However, the main reservoir is to ensure the water source for irrigation and to regulate the climate in the surrounding area so that the current status of the lakes does not cultivate any other than seafood. At present, in the lake, there are only types of carp, drifting fish, carp, carp, and mainly tilapia in the lake. In terms of plants in reservoirs, mainly algae, there are no rare species that need to be preserved. Therefore, the impacts on aquatic ecosystems in the lakes are very small and not worthwhile.

401. The activities of the subproject also affect terrestrial ecosystems such as: solid waste, waste rock and soil, overflowing stormwater, which affects agricultural and forestry land around the area subprojects and the destruction of plant ecosystems for construction site cause impact due to cutting tree…

- Construction of the subproject will generate a quantity of solid waste and waste stone and waste soil, if not well managed, the dumping of solid waste, soil and stone into the environment around the subproject or dumping in the wrong location will affect the terrestrial ecosystem, altering soil quality, or degradation of plants around the subproject. Especially if it is not covered or compacted, the occurrence of rain and flood will overflow waste stone and soil (with very high TSS content) to the environment, affecting agricultural ecosystems. forestry around the subproject area.

- In the process of creating the construction site, it is necessary to cut down trees and crops. However, in the subproject area, most of the surrounding area is productive forest land and agricultural land. Terrestrial ecosystems are not diversified, with Acacia, Eucalyptus, Rice, Sugarcane, ... and shrubs and weeds. However, it is necessary to prohibit workers from cutting down trees outside the clearance area of the subproject. Therefore, the impact in this process on terrestrial ecosystems is small.

- The types of terrestrial animals around the subproject area are not diverse and few species. Because the area around the subproject area is mainly production forest land and agricultural land, the main animals are livestock of people around the subproject such as pigs, chickens, ducks, geese, buffaloes, cows and goats. ... Therefore, it is strictly forbidden for workers to hunt animal in the subproject area. Therefore, the impact in this process is small.

- Around the subproject area, there are no species of rare plants and animals that need to be protected. Terrestrial ecosystems are fundamental and do not have a typical species ecosystem


and need to be protected in the food chain.

402. Impact assessment: small

k. Negative impacts on ethnic minority people

403. The subproject implementation area does not have ethnic minority people living as well as no ethnic minority people benefiting from the subproject.

l. Evaluate and forecast environmental impacts due to risks and incidents of the subproject

(i) Incidents of labor and traffic accidents

404. Labor accidents can occur at any of the activities during the construction process if it is not complied with the labor safety regulations.

405. Major causes of labor accidents include:

- Shortcomings in the design of technological measures such as measures to support formwork, anti-landslide measures which may lead to collapse of the works or labor accident.

- Shortcomings in the construction organization: unreasonable arrangement of labor shift, incorrect arrangement of work order, using non-standard materials, shortening process of construction ...;

- Technological shortcomings: Inadequate or incomplete machinery, means or equipment such as lack of safety, covering, lack of prevention signaling system ...;

- Violating technical safety procedures and norms;- Causes of Risk: Accidents caused by vehicles, electric accidents ... On rainy days, risk of labor

accidents is high due to slippery ground, electric problems, and land subsidence

(ii) Accidents caused by fire and electric fire risk

406. Flammable and explosion hazards may occur in the case of transport and storage of fuel, or due to the lack of safety of the temporary power supply system, resulting in damage to persons and property during construction. Specific causes can be identified as follows:

- Temporary fuel storage facilities for construction, machinery and equipment (paint, petrol, DO diesel, FO) are sources of causing fire. When the incident occurs, serious human, economic or environmental damages may occur;

- When deploying the project, electricity will be used for the construction site, cooking activities. The human negligence will cause the fire and explosion in the storage of petroleum.

- Accidents caused by leakage, spillage and scattering of construction chemicals: In the construction process, there are some kinds of admixture and chemicals such as plasticizers and accelerated intensification of concrete and chemicals, anti-rust paint, expansion additives for cement mortar ....These chemicals and additives are very toxic, they exist in the form of powder or liquid. If they are leaked or poured into the water and air environment, it will cause serious environmental pollution. The use of chemicals and additives during the construction can cause fire, burns or labor accidents if there are no preventive measures.

(iii)Drowning: During the construction process near water bodies, it is possible for workers to take a bath and drown.

(iv) Risks and incidents due to natural disasters

407. As stated in the section "Extreme weather events in 8 districts in the subproject" (Section 4.1.2), risks and incidents due to natural disasters may occur when implementing the subproject as:

- Hot dry southwest wind phenomenon: In subproject area, the hot dry southwest wind occurs annually for 40-50 days with temperatures up to 390C and humidity below 40%, so it is easy to occur fire in site. The concentration of petroleum materials in the stockpile, the welding of iron and steel with high temperatures and low humidity is easy to cause fire and explosion incidents affecting people and property.

- Fire and explosion caused by lightning: With the region's special characteristics, cyclones and lightning often occur. At the time of rain or lightning incidents occur on machines, operating equipment and metal objects on the site, causing the risk of human and property damage.


- Incidents due to rain, storms and tropical depressions: With the situation of climate change complicatedly and the forest destruction activities take place regularly, the storm and low pressure situation affects Nghe An province. In general and the subproject area in particular, there are about 3-4 storms every year, tropical depressions land in Nghe An, which greatly affects people and property. Incidents caused by prolonged storms and storms raise the water level in reservoir, especially during the construction of the subproject, items are vulnerable to flooding and damage to construction items and to workers at construction sites and people in downstream areas. On the other hand, rain prolongs subsidence, affecting construction structures, construction progress may be slow and construction quality is not guaranteed. Therefore, the risks from storms and typhoons are very high and timely forecasting and prevention measures are required.

- Flash flood risks and landslides: Nghe An has diverse terrain, harsh climate and large river and stream density, frequently affected by natural disasters such as surges, high tides, storms, floods, flash floods and landslides. In particular, the subproject area is basically mountainous and small streams, the geology is weak rock and soil layers, and extreme weather events such as storms occur regularly every year so the phenomenon of landslides and flash floods is easy to happening. On the other hand, works under the subproject are located in low-lying areas of hilly terrain, and with the characteristics of flash floods and landslides are fast and difficult to predict. Therefore, the impact of landslides and floods on people and assets is very large and difficult to overcome. Therefore, it is necessary to prepare and prevent the risks of flash floods and landslides for the subproject area.

(v) Assessment: These incidents do not occur very often but when they occur, the consequences will be very serious, which can cause great damage to property and people so project owner and construction units need to take measures to prevent and respond to minimize damage.

(vi) Overall assessment of environmental impacts due to risks and incidents of the project: Moderate

5.3.3. Predictors of specific impacts

408. There are 13/13 reservoirs with sensitive receptors easily affected by the subproject as shown in the table follow:


Table 70: Potential impacts during construction implementation to sensitive works

Place Status of the work Potential impact Level


1. Yen Thanh General HospitalThe location is right next to Tang Lang Street, which is a transport route for TDA materials to the Don Hung reservoir and Ke Sat reservoir. This area is crowded with people.Yen Thanh General Hospital provides general medical examination and treatment services, primary health care for residents in Yen Thanh district, with a large scale with nearly 200 beds and a hospital area.2. Vien MarketLocated right next to Tang Lang Street, opposite Yen Thanh General Hospital, is a route to transport subproject materials to Don Hung reservoir and Ke Sat reservoir. The market area is very crowded.The hospital market is a market run by households opposite Yen Thanh General Hospital, trading in food items, the main items are serving patients in hospitals and patients' families and near households. market area. Vien Market is self-focused by households, so the operation time is continuous throughout the day.

- Vehicles, machinery and construction activities, transportation of materials may cause traffic congestion and traffic insecurity for markets and hospitals due to crowded people. Especially, the market area of Vien Market is very crowded in the period of 10 am - 12 am and 4 pm - 7 pm because this is a market area mainly serving patients and relatives, the transportation of materials in these time frames will cause accidents and traffic congestion, on the other hand, transportation will affect noise and dust for food shops that pollute food affecting consumers' health.

- During the transport of materials, it may impede an ambulance to perform a task that affects the patient's life.

Small

2, Khe Dua reservoi

1. Dong Hieu High SchoolThe location is close to the National Road 48A, which is the route for transporting TDA's materials to Khe Dua reservoir. The school area is crowded with students and passersby.

- Vehicles, machinery and construction activities, transportation of materials may cause traffic congestion and

Small



r

Dong Hieu High School with 29 classes and over 1,100 students. unsafe for the school area during the school hours and after school due to the concentration of students.

3, Thanh Thuy reservoir

1. Martyrs Cemetery Nam Dan District, Van Dien Commune People's Committee: Located right on Highway 15, next to Van Dien Commune People's Committee. Highway 15 is the route for transporting materials of Thanh Thuy reservoir. This is the administrative area and the memorial should be crowded.

- Vehicles, machinery and construction and transportation activities of materials may cause traffic congestion and traffic insecurity at the People's Committee position, Memorial of martyrs. May disrupt organizations, people visit graves of martyrs on holidays.

small





- Construction activities of intake, flood spillway, operation management road, can affect tourism activities, narrow space and hinder, disrupt business activities calendar at the reservoir.

- During construction, mobilizing vehicles, machinery can affect electrical safety, collide lines, damage electric poles causing power outages and unsafe electricity.

Medium


1. Ngoc Son Commune Primary School, People's Committee of Ngoc Son CommuneLocated right on the inter-commune road, this is the administrative area and the school should be crowded. Primary school in Ngoc Son commune has scale of 16 classes and 539 students.2. There is 1 household building a cattle breeding area along the reservoir. There is one household building the breeding area on the hill land area of the household, the location of the breeding area is right next to the lake edge from the main dam to the right 70m. Existing farming areas are raising 4 cows.

- Construction activities for intake can cause impacts on barn structure, narrow space and obstruct breeding activities.

- Vehicles, machinery and construction activities, transportation of materials may cause traffic congestion and unsafe for the school area during the school hours and after school due to the concentration of students

Medium





- Transporting materials in construction causing damage to the construction. Or spill stone and soil, limiting the flow of ditches for irrigation and drainage for downstream areas.

Medium

7, Khe Dung

1. Local bridgeThe bridge is located on the route of transporting materials, 1km away from the lake, the

- In the rainy and flood days, the spring water is high, it is impossible to

Medium



reservoir

bridge crosses the stream, the bridge condition has deteriorated, the bridge is 1.2m wide. under the earth road bridge. At present, the bridge serves the people of village 6,7,8,9 Quynh Thang commune to travel on rainy days because on the rainy days, the water level rises, the soil road is flooded and cannot pass. The bridge only serves when floods occur, so the number of people passing through the bridge is very low.

transport materials through the road below the bridge. On the other hand, the 1.2m wide bridge has deteriorated so it cannot transport materials across the bridge. Therefore may affect the transportation of materials and construction progress.

8, Tuan reservoir


- Construction activities can cause damage to transmission lines due to short-circuit due to the operation of commercial concrete cranes and pumps near the transmission line, ie in the safety corridor of the transmission line;

- Aerial wires may be entangled with metal devices, such as columns or ladders, and vehicles with metal enclosures. Vehicles or grounded metal objects that are brought in close to overhead wires can result in collisions between wires and objects, without actual contact;

- Workers in areas with power transmission lines may have an electric

Medium


Place Status of the work Potential impact Levelshock accident.

- Causing power outages that affect living and production

9, Khe Du reservoir

1. Transportation route goes through Hoa Son Commune People's CommitteeAt present, the route of transporting materials to Khe Du reservoir goes on QL7, the People's Committee of Hoa Son commune is close to QL7, this is an administrative center, crowded and crowded with people to Commune People's Committee to carry out procedures administrative.

- Vehicles, machines and construction activities, transportation of materials may cause traffic congestion and unsafety to the People's Committee area. Because the commune People's Committee always concentrates heavily people on administrative procedures.

Small


1. The route to transport materials to reservoirs passes Vien Quang temple: This is a spiritual area, usually crowded with people who sing in the holidays, day 1, 15 lunar calendar.

- In the holidays, day 1, 15 lunar calendar of Vien Quang pagoda is often crowded with people and Buddhists, so the process of transporting materials can cause traffic

Small


Place Status of the work Potential impact Levelcongestion and unsafe traffic for Vien Quang pagoda area.

11, 3/9 reservoir

2. The area near the lake has 23 households living downstream of the dam, along the lake management road. The status of houses of households is a solid grade 4 house. These households have no households doing business in services. Households mainly grow vegetables and fruit trees in gardens and animal husbandry is mainly chickens and ducks in small quantities providing food for the family.

- These households directly use reservoir water to irrigate and produce in their gardens, so when the construction project can affect the amount of irrigation water of these households.

Small

12, 271 reservoir

1. Roads for transporting materials and road for operation and management are also routes for people to transport glue and eucalyptus when harvesting. Time for harvesting Acacia and Eucalyptus before April and before November 15 every year. Peak vehicle traffic

- Road construction activities, the main dam will affect traffic and travel of people. Disrupting the transport of

Small


Place Status of the work Potential impact Levelduring this time from 10-12 vehicles / 1 day. agriculture and forestry of people.

- Impacts can occur: public security disorder if the vehicles do not give way to the vehicles of local people

13, La Nga reservoir

1. Roads for transporting materials and road for operation and management are also routes for people to transport glue and eucalyptus when harvesting. Time for harvesting Acacia and Eucalyptus before April and before November 15 every year. Peak vehicle traffic during this time from 7-8 vehicles / 1 day


- Road construction activities, the main dam will affect traffic and travel of people. Disrupting the transport of agriculture and forestry of people.

- In the past, there was a drowning incident in the La Nga reservoir area. Therefore, in the process construction, if there is no strict control, drowning can happen to children playing in the subproject area or with construction workers on site.

Small


5.3.4. Evaluating and forecasting of impacts during the operational phase of the subproject

409. Most of the potential impacts during the operational phase are expected to be positive. Temporary construction impacts such as dust, noise and vibration will be stopped during operation. When being completed, the use of land, landscape, local income and socio-economic tends to be stable. Improving dam safety and irrigation services will promote socio-economic development and improve livelihoods of downstream communities. Some status will be changed in comparison with the previous status.

Risk of drowning

410. Reservoir can be a place for washing and bathing activities of people. Therefore, there will be always the risk of drowning if appropriate preventive measures are not taken.

Flood due to discharge and dam breaking

411. Due to the characteristics of the subproject, it is to improve dam safety so that the risk of dam breaking is very low. Emergency discharge of flood can affect downstream communities if it is not informed in advance; cause damage to assets, crops and people and cause indirect impacts such as environmental pollution, diseases and loss of income.

Repair and maintenance of works

412. These activities can lead to water cut-off in a short time. This would cause direct impact on the agricultural production and living activities of the downstream people and will indirectly cause effects such as reduce of income due to time of no cultivation, environmental pollution and disease due to lack of water. However, this effect is considered as minor because the time of repair and maintenance is short (only a few weeks).

Increase the use of fertilizers and pesticides

413. Although the irrigation area is not increased comparing to the original design, the crop structure will be changed as the supply of water is stable and not lost. On the other hand, the area of water shortage will be supplemented to ensure designed irrigation area. Therefore, it will increase the amount of fertilizer and pesticides. On the other hand, according to data on crop structure and fertilizers and pesticides use coefficient in section 4.3.1 of this report, the structure of crop and fertilizer and pesticide use coefficient have been not changed in the subproject area. However, the area recovered from the original design will increase the amount of fertilizer and pesticides by 10-15%. As a consequence, the environment and human health can be affected by toxic chemicals.

414. On the other hand, according to interviews with farmer associations in the sub-project provinces, the status of waste treatment from pesticides is as follows: After being used, most of boxes and bottles of pesticides are thrown directly at the place of use. It is easy to find pesticide bottles and boxes used in the field, such as along paddies, canals or gardens. Only a small number of households kept bottles for selling. However, the pesticide bottles and boxes are gathered in unsafe manner in field or around house. Some bottles are unsafely burned in the field or garden. Most farmers wash pesticide sprayers in the interior field canal or in the ditches or ponds of the field. Wastewater from washing spraying tools is poured into the field or into the canal. It can be seen that this habit has put pesticide residue in water of the canal which is the reason of polluting surface water. Regarding the residual pesticide mixture, after spraying, the residual mixture is treated by spraying it back to the paddy field or near the edge of the field or where there is a high level of pest damage. A few people poured residual mixture directly into the canal. Inadequate treatment of this residual mixture of pesticide will cause the increase of residual mixture of pesticide in the surface water, leading to impact on aquatic organisms and on the food chain that affect the farmers themselves.

5.4. Analysis of types of impact

5.4.1. Cumulative impacts

415. The subproject consists of many dams which, however, are scattered in the territory of the province. Moreover, the size and nature of subproject activities are small and simple, so that the implementation of subproject activities is not likely to cause cumulative effects. According to survey and discussion with relevant agencies, at present, there is no other project implemented in the same


area and at the same time, so that cumulative impacts created by other projects are not available.

5.4.2. Direct Impact

416. Implementation of the subproject will cause direct impacts on the environmental and social conditions in the subproject area. Subproject activities will result in temporary or permanent land loss. Construction activities will cause direct impact on the quality of the surrounding environment of air, soil and water due to the generation of waste such as gas and wastewater and the removal of vegetation.

5.4.3. Indirect impacts

417. The temporary and permanent loss of land will cause impacts on the livelihood of affected persons, reducing or losing of income, leading to change of occupation and social conflicts. Indirect impacts are also identified through the risk of deterioration of water quality due to soil erosion caused by vegetation clearing from the construction process. Water pollution due to waste generated from the construction process can lead to a decline in the composition and number of individuals of aquatic species. Or soil compaction due to the use of heavy equipment on farmland can lead to a decline in the number of useful microorganisms in soil due to changes in soil structure. Loss of vegetation will also lead to loss of habitat for many animal species in the subproject area and increase risk of erosion, and flooding.

5.4.4. Temporary impact

418. In general, most of the impacts associated with construction activities within the subproject area are in short-term such as noise, vibration, dust and emissions, and the generation of solid waste and wastewater. These impacts will no longer exist when construction activities are completed.

5.4.5. Long term impact

419. The permanent loss of productive land will cause long-term impact on the affected persons as some households are perceived as losing of productive material which leads to change of their occupation. Environmental incidents such as oil spilling or hazardous chemicals also cause long term impacts on environment and health status of people because the chemical substance has a long time of decay and has possibility to penetrate into environment of soil, water and food chain. The risk of labor accidents also causes long term impacts because the health of labor will be affected or lost.


CHAPTER VI: ALTERNATIVE ANALYSIS

420. With the aim of improving investment efficiency and ensuring safety and minimizing impacts on the environment and society in downstream areas of the reservoir; scenarios are proposed to select the design and construction options that are appropriate to the objectives and actual socio-economic conditions of the 13 reservoirs. Construction activities are mainly reinforcement and repair on the existing works. Because the design option, selection of technical solutions, technology in the construction of the work items of the subproject has no difference in the impact on the environment and society in the subproject area so that the contents of alternative analysis specify the difference related to environment and society in the scenarios of implementing or not implementing the project.

6.1. Without subproject

421. The works have been constructed for a long time and seriously downgraded:

422. Dam surface, upstream and downstream slope: All 13 dams are the homogeneous dams and dam crests have been not hardened. In the rainy season, it is difficult to observe and operate the works. Some wave walls were broken and sloughing. Most upstream slope are paved with stone, has been peeled and landslide upstream slope. The downstream slope of many locations is landslide, trees grow on the dam slope, there is no drainage system in downstream of dam. Especially in all dams are absorbent through the foundation and dam body with a large flow; wall of upper and downstream dam slope subsided, there are cracks across the dam, there is no protection layer for face dam and downstream slope;;

- Assessment: Without the subproject, the status above will continue to occur and the status of the dam will become more and more serious due to landslides. On the other hand, it can cause large water loss in the reservoir affecting water supply in downstream.

423. Spillway: After many years of putting into operation, most of the spillways have been downgraded, mortar is doted and peeled, permeate status is along the body of spillway, the soil on both sides of the talus is landslided into the spillway. Some reservoirs have energy dissipative tanks but are badly damaged, the remaining reservoirs do not have energy dissipative tanks. The spillway have also been degraded, causing dam safety.

- Assessment: If the subproject is not implemented, the current capacity of the spillways will not be sufficient to meet the drainage requirement if heavy rain and storms occur and a large amount of water will be gathered into reservoir which will cause the status of dam breaking and landslides. Especially, spillways with seriously damaged stilling basin, it can cause serious flash floods and affect the life as well as the property of people in downstream area.

424. Intake: In all 13 reservoirs of the subproject, the intake culvert has been badly damaged at the entrance and exit, the culvert body is damaged, broken, there is water leakage along the culvert body toward downstream, cannot use the level water as required.

425. Monitoring system: At present, all of the 13 reservoirs of the sub-project have no monitoring system so they cannot promote disaster warning efficiency.

426. Road management: All management roads of the 13 reservoirs under the subproject are either earth roads or macadam roads which are small and narrow. On the rainy days, it is very difficult to travel and it cannot ensure traffic condition and management of dam.

427. Management house: Currently, there is no management house for Thanh Thủy, Hòn Mát, Khe. This is inconvenient for the operation and response to dam safety incidents. In case of occurring dam safety incident, it causes risk to people and their asset in downstream area. On the other hand, if the routine monitoring and maintenance are not implemented, it will cause damage. The remaining reservoirs were constructed management house. However, the management house of the reservoirs has been downgraded and need to be upgraded and repaired.

General assessment:

- The current status of the reservoirs causes constraints on the development plan and improvement of productivity and economic efficiency in agricultural production; does not ensure proactive irrigation water; affect the selection of plants and livestock; cannot exploit all


economic value from natural land source.

- When the subprojects are not deployed, the ecosystem of the area around the reservoirs will be stably remained. However, due to the current status of the degraded reservoirs, it causes the potentiality of breaking dams causing damage to people and structure and breaking ecosystem, especially in downstream area of reservoirs.

- In recent years, due to the climate change, floods appear more with heavy rain and intense intensity which causes high risk of safety due to small reservoir bed. A synchronous construction solution such as the investment in construction, repair and upgrading of reservoirs is imperative to ensure the safety of life and property of people in the downstream area and to serve the requirements of economic development of the locality.

6.2. With sub-project

a. When the subproject is implemented, the main technical solution groups are applied as follows:

- Earth Dam: repair and upgrade the dam by methods of reinforcing the crest of the dam, repairing the upstream roof, waterproofing treatment with the structure mainly using local materials such as soil, stone, concrete, reinforced concrete; waterproofing treatment with battered wall or cement mortar grouting; supplementation of monitoring equipment system: depending on the level of works to arrange appropriate and convenient equipment for the operation, maintenance, electronic control and linking to the management system.

- Intake: Depending on the severity of the damage, it needs to decide to repair or newly construct. The repair using reinforced concrete combined with accelerating admixture or steel pipe threading; For new works, it is used reinforced concrete pipe with high mark ... The diversion option of construction of intake is selected to ensure that irrigation water is fully provided to farmers for irrigation.

- Spillway: Improve the drainage capacity to ensure the drainage of extreme floods, it can be opened spillway by the form of Labyrinth; Piano. It is reinforced spillway by concrete.

- Construction road combining with management road (rescue road): Basing on the regulations of the Ministry of Transport, it is to select the type of road, road grade and road surface structure being suitable with the actual conditions.

- Management house: Repair and new construction of the management house for the monitoring, management and operation of the works

- Location of the borrow pit: Buy soil from the licensed borrow pit in Nghe An province

- Location of dumping sites: Agreement by writting with the communes on the disposal site

- Location of workers’ camp and material gathering site: Downstream of dam and crest of dam are located within the dam safety corridors.

- Labor flow: Technical jobs need to be done by the contractor's workers, but there are still 10-15% of the unskilled labor and women in the locality hired by contractors to work for the project.

- Construction machine: Maximum mobilization for each project and construction machines must be tested

b. Analysis of selected options:

- Options and technical solutions for the main dam and spillway: Completely reasonable for the situation and the status of the degraded and waterproofed works. On the other hand, before constructing the works, the option of treatment of termite for dam body was not selected. However, when the design unit discovered that there were termites in the dam body, the termite treatment plan was selected to ensure dam safety after completing. Regarding spillway, the first option which was not chosen, is to keep the current status of the spillways and reinforce the repair of existing damaged items. However, this option causes the risk of dam safety. When there is heavy rain or flood discharge, the large amount of water plus the small spillway width will create great pressure and endanger the downstream area. The second


option, which was chosen, is expansion of spillway, construction in accordance with the form of the Labyrinth and Piano to reduce the water pressure and have stilling basin to ensure that flood discharge does not affect the downstream area.

- Options of construction of intake: The technical design has been designed to ensure the safety of the dam. However, during the construction of intake and some types of dams, it is required to cut off water for construction. There are two options 1 and 2, however the option 2 has been selected.

Option 1: Discharge all water in the reservoir to ensure comprehensive and rapid construction and save the cost. However, this option will cause significant negative impact that it is required to discharge a large amount of water in the reservoirs which will cause flooding and damage to crops in the downstream area. On the other hand, the large amount of water will cause stagnation and pollution of air environment. Aquatic animals and aquatic animals will die and drainage of water will cause the lack of water for agriculture production of the people. Therefore, this option is not selected.

Option 2: Construction diversion. Depending on each construction item, the water in the reservoir will be drained slowly that allows construction of cofferdam to prevent water for the construction activities. In addition, it still leaves the minimum flow to serve agricultural production of people. This option ensures that downstream safety is not affected by immediate flooding and does not pollute the aquatic animals and plants. Besides, in the crop season of people, there is still water being available for agriculture and in case of lack of water, people still use water from nearby pond, reservoirs and stream. This option requires a large amount of embankment soil and machines. However, the amount of excavated soil is large that can be used for embankment of cofferdam. Therefore, the option 2 is selected.

- Option of construction road combining with management road: Roads for transportation of materials: Currently, most of the management routes to the reservoirs are mostly homogeneous roads and there is only one route to the reservoir, so there is no alternative option for management road. The upgrading to ensure travelling and operational management is appropriate. Roads for transporting materials: The selected option is to transport materials through roads where there are few vehicles travelling and with sufficient loading capacity. Especially, the transport routes should avoid sensitive areas such as schools, medical station and cultural center. Therefore, roads for transporting materials from districts’ center have been selected according to the criteria for avoiding sensitive works as above.

- Location of the borrow pit: There are two options Option 1: Coordinate with the Commune People's Committee to determine borrow pit

in the commune area and ensure the quality of the embankment soil. However, this option was not chosen because: when exploiting borrow pit, it is required to obtain permission from the Provincial People's Committee and prepare a separate EIA report for the position of borrow pit. On the other hand, there should be environmental management and monitoring measures for the borrow pits and restore the status to its original after completion. This option will be costly and waste much time.

Option 2: Selected option: Purchase soil from licensed borrow pits in the areas. Around the subproject area, there are legally licensed borrow pits under management unit being responsible to the law to serve the subproject. Therefore, the option 2 is convenient and ensured the cost for the subproject.

- Location of dumping sites: When conducting survey of the project, the consultant unit coordinated with the People's Committees of the subproject communes to find, identify and make minutes of the location of disposal site. The disposal site is required to meet the following criteria: being far from residential areas, far from water sources, and minimizing the management of households and avoiding the types of forest land, agricultural land and residential land. The location of the disposal site must be convenient for waste treatment to avoid causing environmental pollution. Another option is also selected that the need of people


to use waste soil to level their site is large, so people will ask for waste rock and soil to level their site. However, this plan needs the consent of the investor and CPC.

- Location of worker camp and material gathering sites: There are two options being proposed, including: the borrowing of land from the CPC or from the households. This plan is not feasible because it can lead to disturbance of security and conflict; being far from the subproject implementation site; restore the borrowed land area. Option 2 is the chosen option: most of the downstream area and the crest of the dam are under large safety corridors which are close to the construction site, away from the residential area, do not pollute the environment and being favorable for transportation of materials. However, it is necessary to ensure safety due to natural disasters and safety incidents...

- Labor force: The plan of bringing skilled workers from other localities has been taken into consideration. However, in localities, the labor force is very large, and there are still skilled laborers who are suitable for the work. On the other hand, local labors can go home for eating that they can save money and minimize waste to the environment, and minimize local security conflicts.

- Construction machine: All types of machine that contractor brings to the site are inspected and controlled for safety. Works are relatively far from each other, thus it needs to be minimized the movement of machines from one place to another and not wasted time as well as labor force of the project. The other proposed option is to rent some local machines to save money and human resource. However, it is important to ensure that machines will inspected and contracted between the contractor and the lessor.

CHAPTER VII: ENVIRONMENTAL AND SOCIAL MANAGEMENT PLAN (ESMP)


7.1. Objectives

428. The ESMP of the subproject is designed for specific purposes as follows:

- Ensure the compliance with the World Bank’s regulations as well as Vietnam’s legal system, standards and guidelines applied at the provincial and national levels.

- Ensure that sufficient resources are allocated based on the subproject budget to carry out the activities related to the ESMP.

- Ensure that the environmental and social risks of the Subproject are adequately predicted and managed.

- Ensure specific and feasible response plan with unforeseen environmental issues in the subproject's environmental impact assessment.

- Create an effective feedback mechanism for further improving environmental protection results.

- The Environmental and Social Management Plan (ESMP) outlines mitigation, monitoring and institutional measures that will be implemented during the development and operation of the Subproject to avoid or control adverse impacts on the environment, society and outlines the actions required to implement mitigation measures. The ESMP creates a useful link between adverse impact and mitigation measures and ensures that such measures are implemented.

- The ESMP imposes responsibilities for the implementation, monitoring, time and cost for the proposed mitigation measures. The summary of the Subproject’s environmental and social management plans is presented in the following sections.

7.2. Mitigation measures

7.2.1. Impact mitigation measures in the subproject preparation measures

7.2.1.1. Mitigation measures due to land acquisition and site clearance

429. An ethnic minority resettlement and development plan has been prepared and implemented for the subproject.

General principles:

430. All households affected by the subproject with assets or reside within the subproject area before the end of the tally will be entitled for compensation. People who lose income and / or livelihood will be assisted in restoring their livelihoods based on eligibility criteria defined by the subproject with consultation with AHs. If by the end of the subproject, livelihoods have been proven not to be restored to the extent that before the subproject, there will be additional support measures.

Rights:

431. Affected households will be entitled to compensation, support and resettlement policies (if any) in accordance with the regulations of Vietnam and the World Bank under OP 4.12. AHs will not be considered for compensation or support from the subproject for the area to be recalled after the announcement date of the counting of tally.

Impact mitigation solutions

432. At the request of the World Bank, the Plan of Land Clearance has been prepared for CSC subproject. Accordingly, compensation will be made to affected households and organizations due to land acquisition, and other types of assets on the land. In addition, assistance is also provided to minimize the impact on livelihoods, source of income and life of the affected people. Ensure that AHs have life at least equal to the living conditions before the implementation of the works under the subproject.

433. All costs for land acquisition and clearance activities include: i) compensation for land; ii) compensation for crops and trees on land; iii) compensation for construction and structures on the land; iv) costs to support AHs. These costs are in line with the policies of the Government of Vietnam and the World Bank (see details in the subproject's Clearance Plan).


Table 71: Cost estimate for compensation and resettlement of the Subproject

No. Cost item AHs Unit Quantity Unit price AmountI Compensation for land 120,998,8001 Land for annual crop 01 m2 30.5 32,000 976,0002 Land for perennial crops 03 m2 4,000.76 30,000 120,022,800II Compensation for crops and trees 81,400,0001 Acacia (10-20 cm in diameter) 03 m2 800 88,000 70,400,0002 Eucalyptus (diameter from 10-20 cm) 01 m2 125 88,000 11,000,000

IIISupport according to Decision No. 39/2018 / QD-UBND and Decision 58/2015 / QD-UBND of Nghe An province

585,441,600

1 Support vocational training and job transfer 01 m2 30.5 64,000 1,952,00003 m2 4,000.76 60,000 240,045,600

2

Support due to the recovery of public land of communes (only production forest land and perennial crop land in 06 supported communes, The remaining 6 communes are recovered unused flat land, unused hilly land and Land with specialized water surface will not be supported)

6 CPCs m2

641 4,000 2,564,000 1,000 3,500 3,500,000 3,800 35,000 133,000,000 3,500 36,000 126,000,000 2,500 30,000 75,000,000

3

Support to stabilize life and production for households who recover less than 10% of agricultural land (30kg / month / household equivalent to 440,000 VND / month / household for 1 month).

01 Month 01 440,000 440,000

Support to stabilize life and production for households Recovering from 10% to less than 20% of agricultural land in use (30kg / month / household equivalent to 440,000 VND / month / household for 2 months).

03 Month 02 440,000 2,640,000

IV Other expenses 6,103,5001 Support for public works 6,103,500

1.1 electric poles H-shaped towers of 6.5x140C pcs 03 1,144,500 3,433,5001.2 CVV power cables- 2x1.5- (2x7 / 0.52) -0.6 / 1kv m 200 13,350 2,670,000


No. Cost item AHs Unit Quantity Unit price AmountV Total (I+II+III+IV) 793,943,900VI RAP implementation charge (2%) 15,878,878VII Contingency (10%) 79,394,390

Total compensation and support expenses (VND) 889,217,168

Total compensation and support fund (VND) rounded 889,220,000

Total compensation and support expenses (USD) 39,095.19

Exchange rate: 1 USD = 22,745 VND

1kg of rice = 14,660 VND

Source: RAP report


7.2.1.2. Prevention and minimizing the impact on site preparation work

434. During the preparation phase of the project, activities to be carried out including vegetation clearing, site clearance, road construction, camp site construction, construction of housing for construction workers and project operators, measures to prevent and mitigate the impacts include:

- For domestic wastes: The minimum number of workers is 5 people, they may come from this area which do not cause additional domestic wastes.

- For the removed plants: In order to limit the impacts caused by the existence of plant biomass on the site, the project should take measures to collect and treat the whole plant biomass immediately on the construction site. The treatment method includes burning on the spot with the small quantity, or contracting for transportation and treatment with the unit at the commune level.

- For the amount of waste soil, Landfills, construction road, the investor needs to have agreements and permission from the local authorities before construction activities start on construction sites.

7.2.1.3 . Landmine clearance and management of geological exploration boreholes

435. The subproject will hire units with sufficient functions and capacities such as the Center for Landmine and Mine Processing and Environment - The subordinate unit of Military Region IV to conduct the landmine clearance and explosive objects before starting the whole construction works on premises of component projects. Ensuring safe distance and warning for people in the process of implementation will be carried out to comply with QCV 01: 2012 / BQP - National technical regulation on landmine clearance of bombs, explosives and QCVN 02: 2008 / BCT-Regulations National techniques for safety in the transport, storage, use and destruction of industrial explosives.

436. After the geological exploration drilling, the surveying design unit will carry out the filling of drilling holes and casting concrete molds at the position of the drilling hole, writing the borehole name, deepth and return the premises where geological exploration drilling is carried out in order to minimize the impact of leaching of dirt from the drilling holes which may affect the quality of underground water.

7.2.2. Mitigation measures during construction phase

Mitigation measures for general impacts

437. ECOP is a part of the social and environmental management plan. The social and environmental management plan will include detailed measures to mitigate and manage negative environmental and social impacts during the subproject implementation..

438. ECOP is a combination of mitigation measures for common impacts arising from subproject activities throughout the construction process and is attached to the bidding documents as a mandatory requirement for civil contractors. ECOP is not an official safety tool recognized by the World Bank but is still used as part of the Social and Environmental Management Plan for its usefulness and effectiveness to ensure impacts collectively and typically from the subproject construction process is minimized appropriately during the subproject implementation process.

Major environmental and social impacts during subproject construction

439. The content of ECOPs is limited to construction activity for small-and medium-sized construction impacts, limited scope, temporary effects and can be overcome, technically easy to manage with good construction techniques. The environmental and social issues within the scope of this study include:

- Dust and exhaust emissions- Noise and vibration effects - Waste management- Management of hazardous materials- Management of worker camps- Disruption of vegetation cover and ecological resources- Soil erosion


- Drainage and sediment control- Stockpile and borrow pits management- Traffic safety management- Disruptions to existing service infrastructure- Disclosure of cultural relics, archaeological objects- Occupatinal Health and safety- Community Health and Safety- Communication with local communities- Management of labor flow


Environmental code of practices to mitigate general impacts during the construction process

Table 72: Environmental code of practices (ECOP) to mitigate general impacts during the construction process

Environmental and social issues Mitigation measures Regulations of

VietnamResponsible

Implementation Supervision1) Dust and exhaust - The contractor is responsible for complying with the relevant

requirements of Vietnam's regulations on ambient air quality.- Contractor will ensure that dust emissions will be minimized

and will not disturb the local population, while implementing dust control measures to maintain a healthy work environment and minimize disturbance in the surrounding area.

- The contractor is responsible for implementing dust mitigation measures (for example, use of irrigation water for irrigation, covering of material vehicles, etc.).

- Construction materials such as cement, sand and gravel must be properly covered and secured during transportation to prevent the spread of soil, sand, other materials or dust.

- Waste excavated soil and material store must be protected against the effects of wind and the location of the material store should be checked for the popular wind direction and location of the sensitive sources.

- Use a dust mask when dust is too high.- All means of transport and construction must be complied

with the Vietnamese regulations for the control of emission limits for emissions.

- All vehicles must undergo a regular emission test and receive: "certificate of quality, technical safety and environmental protection" under Decision No. 35/2005 / QD. -BGTVT;

- Ensure that no solid waste or construction materials (eg wood, rubber, oil soaked, cement, paper, plastic, bitumen, etc.) areburned.

TCVN 6438-2005: Road vehicles. Maximum allowable emission limit.No. 35/2005 / QDBGTVT on quality control, technical safety and environmental protection;QCVN 05: 2013 / BTNMT: National technical regulation on air qualityWBG EHS Guidelines

Contractor PMU, Construction Supervision Consultant (CSC), DONRE and local communities

2) Impact by noise and vibration

- The contractor is responsible for compliance with the provisions of Vietnamese law relating to noise and vibration issues.

- All vehicles must have "Certificate of quality control, technical safety and environmental protection" under Decision No.

- QCVN 26: 2010 / BTNMT: National Technical Regulation on noise

Contractor PMU, Construction Supervision Consultant



VietnamResponsible

Implementation Supervision35/2005 / QD-BGTVT; Prevention of excessive noise emission from machines that are less maintained.

- The following measures should be taken to reduce noise: Select low noise equipment Install noise reduction equipment for fan Installdead room for covering part of equipment causing

noise Install adjacent sound barrier and minimum surface density of

10kg/m2 to minimize sound transmission Sound barriers need to be placed near the sound source or the

sound transmission source to be effective Installation of vibration control for mechanical machines Limits of operation time for certain devices or activities,

especially mobile sources in residential areas. Transfer noise sources to other areas to take advantage of

distance and barriers Install fixed equipment away from residential areas as

possible Take advantage of the natural terrain in the design process to

prevent noise To limit the use of means of transport serving the project

through residential area Establish mechanisms for receiving and feedback

- QCVN 27: 2010 / BTNMT: Technical regulation on vibration

- WBG EHS Guidelines

(CSC), DONRE and local communities

Waste management I. Normal waste(a) Wastewater- The contractor is responsible for compliance with Vietnamese

regulations relating to the discharge of wastewater into the surrounding environment.

- Consider to recruit local workers to reduce wastewater discharge.- Wastewater treatment systems must be provided for treatment and

disposal of wastewater in areas where wastewater collection system is not available. Wastewater treatment systems should be only used for the treatment of sanitary wastewater. When the

- QCVN 14: 2008 / BTNMT: National technical regulation on domestic water

- QCVN 40: 2011 / BTNMT: National Technical Regulation on Industrial waste water

- Decision No: 59/2007




VietnamResponsible

Implementation Supervisionwastewater treatment system is the selected treatment method, it is necessary to:• Design and installation in accordance with local regulations and guidelines to prevent any risk to public health or the contamination of soil, water or groundwater.• Well maintain to effectively operate.• Install in areas with sufficient seepage soil for the proportion of the design wastewater.• Installed in stable area which is well drained and seepage with separation between drainage ditch and underground water or other receiving waters.

- Wastewater from washing machines and construction equipment must be collected into the pond before being discharged into the local sewerage system.

- When construction works are completed, the waste water tanks and septic tanks must be safely treated or sealed up.

(b) Rainwater- Rainwater should be separated from treatment process and sanitary

wastewater to reduce the amount of wastewater to be treated before discharge.

- Prevent surface runoff from areas or potential sources of pollution.- In case this approach is impractical, the amount of wastewater

from treatment and storage area must be separated from contaminated water

- Minimize flow from areas where there are no potential sources of pollution (by minimizing the surface area of the impervious area) and reduce the maximum discharge proportion (use of ponds and lake).

- In case rainwater treatment is required to protect the receiving water quality, priority should be given to managing and treating the first discharge of rainwater, where the majority of potential pollutants tend to occur.

- When it is allowed by the water quality criteria, rainwater must be

/ ND-CP on solid waste management;

- Decree No. 38/2015 / ND-CP on material and waste management

- Circular 36/2015 / TT-BTNMT on Hazardous Waste Management




VietnamResponsible

Implementation Supervisionmanaged as a resource, either for groundwater recharge or for meeting the water needs of the locality.

- Installation and maintenance of oil water separators and lubricant traps shall be carried out at refueling facilities, factories, parking areas, fuel storage areas.

- Mud from rainwater tanks or collection and treatment systems may contain high concentrations of pollutants and must be treated in accordance with local requirements, and to be suitable for protection of public health, safety, preservation and long-term sustainability of water and land resources.

(c) Solid waste- Prior to construction, the Contractor shall prepare solid waste

control procedures (storage, supply, cleaning schedule, cleaning schedule, etc.) and must carefully pay attention during the construction process

- Prior to construction, a permit certificate is required.- Measures should be taken to minimize the potentiality of arising

waste and negligent action on the disposal of all waste. In all workplaces, the Contractor shall provide garbage bins, containers and garbage collection facilities.

- Solid wastes are temporarily stored at the site in the designated area that has been approved by the Construction Supervision Consultant and the local authorities before collecting and disposal to the licensed collection house.

- Waste packaging must be protected against corrosion- Do not fire, burry or dump solid waste.- Recycled materials such as wooden slabs, steel, scaffolding

materials, packaging materials will be collected and separated from other sources for reuse.

- If not dismantled outside the site, solid waste or construction debris will only be treated in areas identified and approved by the Construction Supervisor and included in the Solid Waste Management Plan. In any case, the contractor will not treat any



VietnamResponsible

Implementation Supervisionmaterial in environmentally sensitive areas, such as in areas of natural habitat or in water bodies.

Hazardous waste(a) Storage of hazardous wasteHazardous waste must be stored to prevent or control accidental release into the air, soil, and water sources in the area where:- Wastes are stored in a way that prevents any disturbance or contact between incompatible wastes and it is allowed to check leaks or spills. Examples, it includes spaces between compatible spaces or physical isolation such as walls or barriers. - Store in a tightly closed container to avoid direct sunlight, wind and rain.- Storage should be on a waterproof surface that is easily cleaned, and properly packaged to contain any spill or leakage. The storage area should be covered to prevent rainwater from accumulating.- Secondary prevention systems must be constructed with appropriate materials for the storage of waste and being sufficient to prevent leakage into the environment.- Secondary storage includes wherever liquid waste is stored in volumes greater than 220 liters. The available volume of secondary containment must be at least 110 percent of the largest storage, or 25 percent of total storage capacity (whichever is greater) at that particular location.- Provide adequate ventilation of volatile storage.(b) Transportation of hazardous waste- Onsite and offsite waste transportation should be carried out to

prevent or minimize spillage, release, and exposure to staff and community.

- All waste containers designated for off-site transportation must be protected and labeled with relevant content, properly packed on the transport vehicle before leaving the site and must be accompanied by a shipping certificate (eg manifest) describing the load and associated hazards in accordance with the instructions.



VietnamResponsible

Implementation Supervision(c) Burial of hazardous wastes- Chemical wastes in any form must be disposed of at an approved

appropriate burial site and in accordance with the requirements of local law. The contractor must have the necessary processing certificate.

- Disposal of hazardous waste must be carried out and handled by specially trained and certified workers.

- Oils, lubricants, detergents from the maintenance of vehicles and machine must be collected in storage tanks and must be recycled by the company specializing in waste oil recycling at hazardous waste disposal sites.

- Unused or rejected bitumen products will be returned to the supplier's factory.

4) Soil erosion - Limit implementation of construction activities on rainy days- Use geotextile to temporarily cover erosion-prone soil- Apply a covering layer on ground to absorb water gradually- Build the walls around the erosion area to block the flow of water- Stablizesoil surface being easily eroded by cultivation or

concreting.

WBG EHS Guidelines Contractor PMU, Construction Supervision Consultant (CSC), DONRE and local communities

5) Drainage and sediment management

- Contractors should comply with the detailed design of the wastewater system in the construction plan to prevent water spills or erosion of hillsides and areas not protected from flood, leading to situation that industrial waste affects local water resources.

- Ensure the sewage system is free from mud and other obstructions.- Ensure the maintenance of the status of areas that are not under

construction.- Reasonable work of excavation, backfilling, embankment,

compliance with construction standards, including measures such as installing of sewage system and planting of trees.

- In order to avoid sedimentation causing negatively effect on water resources, a sediment management system should be installed to

- TCVN 4447: 1987: Construction regulations and acceptance- Circular No.

22/2010 / TT-BXD of the Ministry of Construction regulating labor safety in construction work

- QCVN 08-MT: 2015 / BTNMT - national




VietnamResponsible

Implementation Supervisionslow or reverse the discharge of sediment until the cultivation is carried out. Sediment management systems may include the removal of waste from canal, canal banks, waste gathering tank, material, post-storm sewerage protection systems, or barriers.

- Drainage and diversion: In case the construction works need to be carried out at water sources (bridges, retaining walls, erosion protection), the area should be drained to ensure dry conditions to conduct construction. Water after settling from the construction site must be discharged into the sediment management system to be treated before flowing into the water source.

- Implementation of mitigation measures for each specific area under the ESMP should be implemented when changing water flows or constructing dykes.

technical standards on surface water quality

6) Management of hazardous materials and chemicals

- The use of hazardous materials and chemicals within the subproject area must strictly comply with the manufacturer's instructions.- The use of chemicals on the list of authorized agencies - Persons exposed to hazardous materials and chemicals should be participated in intensive training in risk prevention measures due to exposure to hazardous materials and chemicals.- Persons who are frequently exposed to hazardous materials and chemicals should be periodically checked health (no less than 6 months) and appropriate rest periods are recommended to themTransportation of hazardous materials and chemicals- Use of accessories, pipes and hoses dedicated to the materials in

the tank (for example, all acids use one type of connection, all caustics use different equipment) and maintain the procedure to prevent the addition of toxic substances to the inaccurate tank.

- Use of transfer equipment which is compatible and conforms to the characteristics of the transferred and designed material to ensure safe transfer.

- Regular inspection, maintenance and repair of accessories, pipes and tubes.

- Provides secondary prevention or other spill prevention and

- Decree No. 38/2015 / ND-CP on waste material and waste management

- Decision No. 23/2006 / QD-BTNMT: Promulgating the list of hazardous wastes

- Circular No. 36/2015 / TT-BTNMT on management of hazardous wastes

- Circular No. 03/2016 / TT-BNNPTNT on the list of pesticides allowed to be used in Vietnam

- Circular No. 21/2015 / TT-




VietnamResponsible

Implementation Supervisioncontainment measures for containers of hazardous materials at possible connection points or spill points.

Overload control- Prepare written procedures for transportation activities including a

checklist of measures to be taken during the filling process and use of trained staffs on the process.

- Install the measuring equipment on the bin to measure the volume inside.

- Use of water pipe connections for tank trucks and fixed connections to the tank.

- Provide automatic sealing valves on the tank to avoid overloading.- Use a water tank around the dumping pipe to collect spill material.- Use pipe connection with automatic overload protection valve

(float valve).- Pump less capacity into the tank or vessel by placing less material

than its available capacity.- In case of overload or over-discharge, it needs to control overload.Response, fire prevention- Storage of incompatible materials (acids, bases, flame retardants,

oxidants, chemical reactants) in separate areas, and facilities to separate the material storage area.

- Provide specific material storage for extremely hazardous or reactive materials.

- Use flame arresters on vents from flammable containers.- Provide lightning protection equipment for tanks, transfer stations

and other equipment used to treat flammable materials.- Select compatible building materials with stored products for all

parts of the storage and distribution system and avoid use of containers for various products without compatibility testing of materials.

- Storage of hazardous materials in the isolated area of the main works. If closeness cannot be avoided, physical separation must be made using designed structures to prevent fire, explosions, spills,

BNNPTNT on management of pesticides




VietnamResponsible

Implementation Supervisionand other emergencies that affect the operation of the facility.

- The storage area should be on a waterproof and easily cleaned surface, reasonably packaged to avoid any spills or leaks. Storage areas should be covered to prevent accumulated rainwater.

- Prohibit all sources of ignition from areas near flammable tanks.Secondary chamber (liquid)- Transfer of hazardous substances from tank to storage in areas

with sufficiently seepage surface to avoid losing of the environment or storage structure not connected to the wastewater / rainwater collection system.

- If no permanent prevention structure is provided for transfer activities, one or more spill prevention forms should be provided such as mobile covering (which can be deployed during the implementation process), pressure reducing valves on rainwater tanks, or closing valves in drainage or sewer equipment, in conjunction with oil water separators.

- Store hazardous materials in tanks with a capacity equal to or greater than 1,000 liters in areas with a waterproof surface or covering with a cover to contain a minimum of 25% of total storage.

- Provides secondary prevention capability for the components (tanks, pipes) of hazardous material storage system in feasible extent.

- Carry out routine tank inspection (daily or weekly), and inspect visible parts of tank trucks and piping to avoid leakage.

- Use of composite or special storage systems and pipelines, especially the use of underground tanks (USTs) and underground pipelines. If using a dual wall system, it should be provided a means of detecting leakage between the two walls.

Training - Employees need to be trained in hazardous waste management. Training programs include:- List of trained staffs- Specific training objectives.



VietnamResponsible

Implementation Supervision- Mechanisms for achieving goals (practical workshops, videos,

etc.).- Means determining whether the training program is effective or

not- Training procedures for new recruited persons and new courses for

existing staffs.Community Participation and Awareness- There is general information for the community that is likely to be

affected by the scope and extent of the project activities and on-site preventive and control measures to ensure that there is no impact on people’s health.

- Potential effects on human health or the environment caused by incidents or from existing hazardous wastes.

- Specific and timely information on the behavior and appropriate safety measures will be adopted in the event of an accident including practice exercises at high risk locations.

- Access to information needed to understand the nature of the possible impact of an accident and the opportunity to contribute effectively to relevant decisions and to develop community emergency preparedness plans. .

- DoNREs and DOHs will be informed in time of any environmental incidents.

- Preparation and implementation of remedial measures after an oil spill incident. In this case, the contractor must provide a report explaining the reason for the spilling status, corrective actions, consequence / damage from the spill incident.

Biological effect - The Contractor should establish a Management Plan for Site Clearance, plantation restoration and rehabilitation in accordance with the relevant regulations for pre-approval by the Engineer. Site clearance plan must be approved by Construction Supervision Consultant and Contractor should strictly comply with this plan. Limit the number of areas that need to be cleared as low as possible.

- Law on Biodiversity No.20/2008 / QH12

- Decree 65/2010 / ND-CP guiding the Law on Biodiversity

Contractor PMU, Construction Supervision Consultant (CSC), DONRE and local



VietnamResponsible

Implementation Supervision- The site clearance in mountainous areas requires the permission of

the Ministry of Agriculture and Rural Development.- Contractors need to clear topsoil layer of all areas where topsoil

layer will be affected by the work of restoration, including temporary measures such as storage and crowding; the removed topsoil layer will be gathered in the area agreed with monitoring consultants to use for replantation of vegetation.

- It is prohibited to use chemicals in the clearing of vegetation- Do not cut trees unless it is regulated in clearing plan of

vegetation. - Install a temporary protective fence to protect the trees that need to

be retained if necessary before commencing work at the site.- No encroachment on ecological resources unless it is allowed by

Construction Supervision Consultant. The consultant should consult with the PMU, the Independent Environmental Monitoring Consultant (IEMC) and other relevant and competent authorities. These areas include areas used for raising birds, animals, or protected areas used to be green space.

- The contractor should ensure that there will be no activity of hunting, trapping or poisoning animals.

communities

- Traffic management - Contractors must strictly comply with the provisions of the Road Traffic Law- Comply with the best traffic safety measures in all aspects of subproject activities with the aim of preventing traffic accidents and minimizing injuries that the subproject staffs and community have to suffer. Measures should include:

Emphasize safety aspects for the driver. Improve driving skills and driving license requirements. Approve the limits of travel time and arrange the control panel

to avoid overloading status Avoid dangerous roads to reduce the risk of accidents. Use the speed control device on the truck, and monitor the

actions of driver from a long distance

- Law on Road Traffic No. 23/2008 / QH12;

- Decree No. 46/2016 / ND-CP on administrative sanctions in road and railway traffic

- Construction Law No. 50/2014 / QH13;

- Circular No. 22/2010 / TT-BXD on labor safety in construction of works.




VietnamResponsible

Implementation Supervision- Regular maintenance of the vehicle and use of parts approved by the manufacturer to minimize serious accidents that may occur due to failure of equipment.- Minimize the interaction of pedestrians with construction vehicles.- Cooperate with local communities and competent agencies to improve the signboard, vision and overall safety of roads, especially along routes near schools or other places where there are children. Coordinate with local communities on traffic education and safety for pedestrian (school education campaign).- Coordinate with emergency response agencies to ensure that appropriate first aid measures are provided in the event of an accident.- Use locally sourced materials, whenever possible, to minimize transportation distance. Locate associated facilities such as labor camps in the subproject area and arrange transportation of workers by bus to minimize external traffic.- Use safe traffic control measures, including signs and flyers to

warn of hazardous conditions.


9) Interruption in providing public services

- Disruption in providing water, gas, electricity, internet services with planning and without planning: The contractor must conduct prior consultation and prepare a contingency plan with the local authorities about the consequences of discontinuing the service or disconnection.

- Coordinate with service suppliers to set up a reasonable construction schedule.

- Provide information to affected households on work schedule as well as plan to stop providing services (at least 5 days in advance).

- Contractors must ensure that there will be alternative option to water supply to affected residents in case of disruption more than one day.

- Any damage to the existing utility system of the cable line will be reported to the authorities and repaired as soon as possible.

- Decree No.: 167/2013 / ND-CP stipulating administrative sanctions in the field of security, social order and safety; Prevention of social evils


- 10) Management of workers' camps

- The camps of contractor and workers are built temporarily on the land of the subproject.

- Labor Law 10/2012 / QH13

Contractor PMU, Construction



VietnamResponsible

Implementation Supervision- These areas are built to be far enough in comparison with area

used for gathering construction materials, storing waste and waste oil, discharge canals, sensitive sites such as schools, hospitals, churches, temples, and other hazardous areas such as landslide or erosion area.

- The camps should be ensured good conditions such as ventilation, sunlight, clean water, garbage collection, septic tank, mosquito net, fire extinguisher, medical first aid kit, and other health protection facilities for workers.


Supervision Consultant (CSC), DONRE and local communities

- 11) Management of social issues related to labor influx

- Employ local workers for simple jobs, and to limit the increase in number of workers in the subproject area.

- Local workers should be signed contract and fully applied insurance with the contractor

- Should explain to the workers about the local customs and practices to avoid conflict with local people.

- Owner of the subproject and contractors should cooperate with local agencies to prevent social evils.

- Strengthening of campaigns to eliminate social evils- Contact local organizations to ensure effective management and

GRM so that affected local people can be trusted.- Workers temporarily live in camps and rental housing must

register their temporary residence with local authorities.- Employees are strictly forbidden to:

Use alcoholic beverages during construction Arguing and fighting Participating in gambling, social evils such as drug use,

prostitution Indiscriminately throwing of garbage

- Decree No.: 167/2013 / ND-CP stipulating administrative sanctions in the field of security, social order and safeguard; Prevention of social evils



- 12) Chance finds If the contractor discovers archaeological sites, historical relics, bones and display, including cemetery and / or individual graves during excavation or construction, the contractor shall:

Stop building activities in the found area Decline the location or area of discovery;

- Law on amendment and supplementation of some articles of the law on cultural heritage No.

Contractor PMU, Construction Supervision Consultant (CSC),



VietnamResponsible

Implementation Supervision Protect the location to prevent any damage or loss of moving

objects. In the case of objects which may be dismantled or sensitive, it should be arranged a night guard person until the agency responsible for protecting the local heritage or the Department of Culture, Sports and Tourism comes to receive;

Inform the Construction Supervision Consultant and the consultant will inform the local or national agency being responsible for heritage protection (within 24 hours or less);

The agency being responsible for protecting the local or national heritage will be responsible for protecting and preserving these sites before deciding on the next procedure. A preliminary assessment report on the detection process is in place. The significance and importance of the findings are evaluated in accordance with different criteria related to cultural heritage, including aesthetic, historical, scientific, research, social and economic values;

Decide on how to deal with the search made by the agency responsible for protecting the local heritage. This may include changes in arrangement (for example when finding a relic which cannot be removed), conservation, preservation, restoration and recovery;

If locations and / or cultural heritage are of high value and the preservation of the locations is recommended by experts and required by the agency responsible for the protection of the local heritage, the Project Owner should change the necessary design to meet the requirements and preserve these positions;

Decisions related to search and management will be notified in writing to the competent authority

Construction works is continued only after obtaining permission from the agency responsible for protecting the local heritage.

28/2001/QH10;- Law on

supplementation and amendment of cultural heritages. 32/2009 / QH12;

- Decree No. 98/2010/ND-CP on supplementation and amendment

DONRE and local communities

- 13) Occupational health and safety

Over-exertion - Training for workers on lifting and handling techniques in

- Directive No. 02/2008 / CT-BXD on

Contractor PMU, Construction



VietnamResponsible

Implementation Supervisionconstruction, including setting a weight limit on which mechanical assistance or a two-person lift is required.- Prepare implementation plan to minimize the need for manual transportation of heavy loads.- Select tools and design working points to reduce power requirements and retention time, and promote improved posture, including workstations. - Implement administrative control on working processes, such as job rotation and rest or break.Slips and falls - Well implement sanitation measures, such as placement and

arrangement of construction materials or debris in areas being arranged far away from walkways.

- Regular cleaning of waste and liquid waste.- Locate electrical wires in common areas and marked corridors.- Use anti-slip shoes.Work at height- Training and use of temporary fall prevention devices, such as

rails or other fences that may support a weight of 200 pounds when working at or above two meters or at any height with the risks including falling into machines being operated, into water or other liquids, into the hazardous substance, or the open area on the work place.

- Training and use of personal protective equipment, such as seat belts and harnesses which are capable of supporting 2,268 kg (also described in this above section), rescue procedures for fallen persons to prevent falling from the height. The connection point of the anti-falling system can also support 2,268 kg.

- Use control areas and safety monitoring system to warn workers about locations near dangerous areas, mark and label openings on the floor, roof or surface.

Struck by objects - Use restricted or discharge areas and / or gutter to safely move

adjustment and strengthening of measures to ensure labor safety and hygiene in units under construction sector

- Circular No. 22/2010 / TT-BXD dated 03/12/2010 of the Ministry of Construction regulating labor safety in construction of works

- QCVN 18: 2014 / BXD: National technical regulation on construction safety





VietnamResponsible

Implementation Supervisionwaste from top to bottom.

- Saw, cut, grind, split or chisel with appropriate protection and fasten when applied.

- Maintain specific movement method to avoid heavy equipment crossing discarded materials.

- Use protective measures when someone or material is dropped by scaffolding and the edges of work surfaces, such as handrails and planks, to prevent material from falling down.

- Removal of work areas during blasting and use of explosive carpet or deflating methods to minimize flying stones if the work is conducted close to the person or works.

- Wear appropriate personal protective equipment, such as safety glasses, masks, helmet, and safety shoes.

Moving of machinery- Planning and segregating of traffic locations, operation of

machines and walking, and controlling of traffic vehicles through one-way traffic, setting speed limit, and people equipped on site with jacket to be easy to observe or wears specialized clothing to regulate traffic.

- Ensure easy observability through the use of identifiable jackets when working or walking through heavy equipment operating areas and training for workers to check eye contact with the operator of the equipment before receiving the vehicle.

- Make sure that the moving equipment is equipped with an alarm system.

- The use of lifting equipment which is well checked and maintained in line with the load such as the crane and ensure the load when lifting them higher than the required height.

Dust- Implement dust minimization techniques such as using water or

non-toxic chemicals to minimize dirt from vehicle movements.- Personal protective equipment such as mask will be used where

dust levels are too high.



VietnamResponsible

Implementation SupervisionConfined spaces and excavations - Control of specific factors on the site can contribute to the

instability of the slope of excavation activity such as the use of water rejecting technique in excavation, side wall plate support, and adjustment of slope to eliminate or minimize the risk of collapse, forming traps or drowning.

- Provide safe means to access to and out of excavated areas, such as grade ramps, stairs and ladders.

- Avoid operating the burning equipment for a long time in excavation or embankment areas where other workers have to work unless the area is ventilated.

Other site hazards - Use trained staff to identify and eliminate wastes from containers,

pots, vats, processing equipment or contaminated soil as the first step in order to be able to excavate or construct, dismantle or destroy the safety.

- Use specially trained staff to identify and eliminate potentially hazardous materials in the construction prior to demolition including, insulators or structure elements containing amiang, Polychlorinated Biphenyls, electrical components containing mercury.

- Use appropriate protective equipment based on health and safety assessment including respirators, protective clothing, gloves, and eye protection.

- 14) Community health and safety

A. General site hazards - The subproject must implement risk management strategies to

protect the community from physical, chemical, or other hazards associated with construction sites.

- Limit access to the construction site through a combination of internal controls and administrative measures. For structures or areas of high risk, it is depended on the specific situations to establish fence, sign board, and propaganda of risks to local communities.

- Road traffic law No. 23/2008 / QH12

- Circular No. 22/2010 / TT-BXD on labor safety in construction

- QCVN 18: 2014 / BXD: Technical regulations on safety




VietnamResponsible

Implementation Supervision- Eliminate hazards on construction sites that cannot be effectively

controlled by restricting access to the site, such as covering open areas to small spaces which are covered, ensure exists for more opening areas such as excavation ditch around the hazard materials.

B. Disease preventionCommunicable disease- Need to supervise and screen and treatment for workers - Prevent diseases for workers in the local community by:

Introduce health and education awareness initiatives, for example by implementing an information strategy to reinforce individual awareness in order to address systemic factors that may affect individual behavior as well as promoting the protection of individuals and protecting others from infection by encouraging the use of condoms.

Train health staffs on treatment. Implement vaccination programs for local community workers

to improve health and prevent infection. Provide medical services Provide treatment through management of typical case at on-

site or community-based health facilities. Ensure access to appropriate medical treatment, especially for migrant workers.

Promote cooperation with local authorities to increase access of families of workers and the community to public health services and promote vaccination.

Vector-born diseases- Prevent the spreading of larvae and pathogens through hygienic

measures and removal of habitats and the reproduction of larva in the residential area

- Remove unused stagnant water.- Increase flow in natural and artificial canals- Consider the application of surrounding of pesticide residues areas - Implement vector control programs.

in construction - WBG EHS

Guidelines



VietnamResponsible

Implementation Supervision- Promote the use of medicine, clothing, nets, and other preventive

measures to prevent insect bites.- Preventive treatment with non-immune drugs and in collaboration

with health staff to destroy disease containing areas - Monitoring and treatment of endemic and migratory populations to

prevent the spread of the disease.- Cooperate and exchange equipment and machine with other

control programs in the subproject area to maximize benefits.- Training sub-project staffs and local people on risk, prevention,

and treatment.- Monitor communities in high risk seasons for the detection and

treatment of cases.- Distribute appropriate educational materials.- Comply with the safety instructions for storing, transporting and

using pesticides to minimize the potentiality for abuse and exposure of people due to accidents.

- 15) Management of stockpiles and borrow pits

- Large mines or storage area will need specific measures to be beyond the scope of mitigation measures in the ECOP.

- All used positions must be determined in advance in the approved construction engineering requirements.

- An open ditch will be built around the storage area to block wastewater.

- For a mine that is open for the first time, it is necessary to reserve the topsoil layer so that it will be re-used to restore the opened mine to its original natural condition.

- The use of new areas for the storage, gathering or exploitation of materials required for the construction process must be pre-approved by the construction engineer.

- When landowners are affected by the use of their land area for storing and gathering material or material exploitation, these owners must be included in the resettlement plan of the project.

- If access is required, it must be considered in the environmental assessment.




VietnamResponsible

Implementation Supervision16) Communication with the local community

- Maintain communication with local authorities and communities; the contractor should cooperate with local authorities (communal chairperson and village heads) on the construction plan agreed in the area near the sensitive area or in the sensitive time such as religious festival).

- Make a copy in Vietnamese on the ECOP and related environmental safeguard documents to local agencies and workers.

- Entertainment Park and parking area are affected: The loss of public infrastructure during construction is an inconvenience to people in sensitive areas. However, the consultation with the affected people will create opportunities for research and implementation of alternative measures.

- Disseminate subproject information to affected parties (eg local government, enterprises and affected households, etc.) at community meetings prior to construction.

- Provide contact information of the public relations unit so interested parties can gather information on site activities, status and results of the subproject implementation.

- Provide all information, especially technical data, in a way that is understandable to the public and useful to the interested parties as well as the authorities through tables, newsletters, when there are results during the implementation phase.

- Manage the involvement to community and information requirements for subproject implementation.

- Respond promptly and accurately to requirements by phone and official letter.

- Inform the local people about construction plans, service disruptions, bus routes in case of explosion or destruction.

- Limit work in the evening. If needed, it has to ensure that the work is well prepared and that everyone is adequately informed to take the necessary measures.

- A notice must be given at least 15 days in advance of interruption of services (including electricity, water, telephone, bus, etc.) to the

-Decree No. 167/2013 / ND-CP on sanctioning administrative violations in the field of security, social order and safety




VietnamResponsible

Implementation Supervisionpublic by posting a notice at the sub-project site, bus and at affected businesses / households.

- Provide documentation and technical drawings to local authorities and residents, particularly the construction site and the ESMP of the work site.

- Bulletin boards should be located at all construction sites to provide project information as well as contact information of the project management, environmental staff, safety and health staff, telephone numbers and Other contact information so that affected individuals can present their concerns as well as make recommendations.

7.2.3. Mitigation measures for specific impacts

440. In addition to the general mitigation measures mentioned above, during the implementation of the 13/13 reservoirs in Nghe An province, there are specific impacts on sensitive areas scattered on the construction sites. After consultation with local authorities and communities, specific solutions and implementation are presented in the following table:

Table 73: Mitigation measures for sensitive works


Place Status of the work Potential impact Mitigation measures Responsibility to implement Monitoring


1. Yen Thanh General HospitalThe location is right next to Tang Lang Street, which is a transport route for TDA materials to the Don Hung reservoir and Ke Sat reservoir. This area is crowded with people.Yen Thanh General Hospital provides general medical examination and treatment services, primary health care for residents in Yen Thanh district, with a large scale with nearly 200 beds and a hospital area.2. Vien MarketLocated right next to Tang Lang Street, opposite Yen Thanh General Hospital, is a route to transport subproject materials to Don Hung reservoir and Ke Sat reservoir. The market area is very crowded.The hospital market is a market run by households opposite Yen Thanh General Hospital, trading in food items, the main items are serving patients in hospitals and patients' families and near households. market area. Vien Market is self-focused by households, so the operation time is continuous throughout the day.

- Vehicles, machinery and construction activities, transportation of materials may cause traffic congestion and traffic insecurity for markets and hospitals due to crowded people. Especially, the market area of Vien Market is very crowded in the period of 10 am - 12 am and 4 pm - 7 pm because this is a market area mainly serving patients and relatives, the transportation of materials in these time frames will cause accidents and traffic congestion, on the other hand, transportation will affect noise and dust for food shops that pollute food affecting consumers' health.

- During the transport of materials, it may impede an ambulance to perform a task that affects the patient's life.

- Strictly control the means of transporting materials, vehicles that need to be tested and ensure safety when transporting.

- Do not transport materials at peak hours, market hours.

- Need traffic signs at the hospital and market area.

- Always obey traffic laws, give way to priority vehicles.

Contractors PMU, Construction Supervision Consultant (CSC), DONRE and local communities



2, Khe Dua reservoir

1. Dong Hieu High SchoolThe location is close to the National Road 48A, which is the route for transporting TDA's materials to Khe Dua reservoir. The school area is crowded with students and passersby.Dong Hieu High School with 29 classes and over 1,100 students.

- Vehicles, machinery and construction activities, transportation of materials may cause traffic congestion and unsafe for the school area during the school hours and after school due to the concentration of students.


- Do not transport materials at peak hours, and the timing of into school,after school of, students.

- Need traffic signs at the school area


3, Thanh Thuy reservoi

1. Martyrs Cemetery Nam Dan District, Van Dien Commune People's Committee: Located right on Highway 15, next to Van Dien Commune People's Committee.

- Vehicles, machinery and construction and transportation activities of materials may cause traffic

- Implement well measures to minimize dust and noise impacts. Full shielding when transporting.

Contractors PMU, Construction Supervision Consultant



r

Highway 15 is the route for transporting materials of Thanh Thuy reservoir. This is the administrative area and the memorial should be crowded.

congestion and traffic insecurity at the People's Committee position, Memorial of martyrs. May disrupt organizations, people visit graves of martyrs on holidays.


- Do not transport materials at rush hours, break hours and holidays at Nam Dan martyr's cemetery.

- Need to complete the status quo if causing damage to public transport works.

- Coordinate closely with the People's Committee to have reasonable time to transport materials.

(CSC), DONRE and local communities



- Construction activities of intake, flood spillway, operation management road, can affect tourism activities, narrow space and hinder, disrupt business activities calendar at the reservoir.

- During construction, mobilizing vehicles, machinery can affect electrical safety, collide lines, damage electric poles causing power outages and unsafe electricity.

- Notice of construction time to Minh Sang Company before 3 months to have time to prepare and arrange suitable business.

- Ensure the construction does not affect dust, noise, air and water pollution to Minh Sang company area.

- Coordinate closely with the People's Committee to have reasonable time to transport materials.

- Dissemination of electrical safety corridors according to Decree 14/2014 / ND-CP for workers, drivers and machines on construction sites

- Compensation to support moving affected electric pole and cable items. Notify in




advance to Thai Hoa Electric Power Company for 3 months to proceed with relocation.


1. Ngoc Son Commune Primary School, People's Committee of Ngoc Son CommuneLocated right on the inter-commune road, this is the administrative area and the school should be crowded. Primary school in Ngoc Son commune has scale of 16 classes and 539 students.2. There is 1 household building a cattle-breeding area along the reservoir. There is one household building the breeding area on the hill land area of the household, the location of the breeding area is right next to the lake edge from the main dam to the right 70m. Existing farming areas are raising 4 cows.

- Construction activities for intake can cause impacts on barn structure, narrow space and obstruct breeding activities.

- Vehicles, machinery and construction activities, transportation of materials may cause traffic congestion and unsafe for the school area during the school hours and after school due to the concentration of students

- Notify the construction plan to the household 3 months in advance to plan farming and avoid loss of livestock.

- Commitment to repair and return to the original state of the infrastructure in case of damage

- In construction activities, it is necessary to propagate and manage workers who do not steal livestock from households

- During construction, there should be barriers to avoid pets in the construction area. If there is loss of livestock, depending on the cause, the contractor can support people if the reason is due to construction.






- Transporting materials in construction causing damage to the construction. Or spill stone and soil, limiting the flow of ditches for irrigation and drainage for downstream areas.

- Consult local authorities about construction plans and schedules of items

- Strictly control the load of materials transport vehicles

- Commitment to repair and return to the original state of the infrastructure in case of damage


7, Khe Dung

1. Local bridgeThe bridge is located on the route of

- In the rainy and flood days, the spring water is high, it

- Regularly monitoring forecasts of extreme weather phenomena

Contractors PMU, Construction



reservoir

transporting materials, 1km away from the lake, the bridge crosses the stream, the bridge condition has deteriorated, the bridge is 1.2m wide. under the earth road bridge. At present, the bridge serves the people of village 6,7,8,9 Quynh Thang commune to travel on rainy days because on the rainy days, the water level rises, the soil road is flooded and cannot pass. The bridge only serves when floods occur, so the number of people passing through the bridge is very low.

is impossible to transport materials through the road below the bridge. On the other hand, the 1.2m wide bridge has deteriorated so it cannot transport materials across the bridge. Therefore may affect the transportation of materials and construction progress.

so as to gather construction materials beforehand or avoid transporting in rainy days to ensure safety and life of transport workers.

- At present, the bridge restricts the load to less than 0.5 tons, so the means of transporting materials should not exceed the load of the bridge to avoid incidents of people and property when crossing the bridge.


8, Tuan reservoir


- Construction activities can cause damage to transmission lines due to short-circuit due to the operation of commercial concrete cranes and pumps near the transmission line, ie in the safety corridor of the transmission line;

- Aerial wires may be entangled with metal

- Establish an "unreachable" area around or under a power transmission line;

- The following acts are strictly prohibited (according to the Government's Decree No. 14/2004 / ND-CP on electric safety): Use electric poles as

shelters; Dụng Use power

Contractors PMU, Construction Supervision Consultant

(CSC), DONRE and

local communities



devices, such as columns or ladders, and vehicles with metal enclosures. Vehicles or grounded metal objects that are brought in close to overhead wires can result in collisions between wires and objects, without actual contact;

- Workers in areas with power transmission lines may have an electric shock accident.

- Causing power outages that affect living and production

transmission lines for other purposes without the permission of the regulatory authority;

Using equipment may cause vibration or damage to the power transmission line

Keep materials, equipment and waste in the safety corridor;

Store explosives, flammable materials and chemicals that can cause corrosion or damage to the transmission line;

Digging causes subsidence for electric poles;

steal power transmission lines.

9, Khe Du reservoir

2. Transportation route goes through Hoa Son Commune People's Committee

At present, the route of transporting materials to Khe Du reservoir goes on QL7, the People's Committee of Hoa Son commune is close to QL7, this is an administrative center, crowded and crowded with people to Commune People's Committee to carry out procedures administrative.

- Vehicles, machines and construction activities, transportation of materials may cause traffic congestion and unsafety to the People's Committee area. Because the commune People's Committee always concentrates heavily people on administrative procedures.

- Notify local authorities and pagodas management about the progress of lake repair.

- Means of transport must meet the standards and at the same time do not carry over load, causing damage to the road. It is necessary to limit the use of horns during transport through the People's Committee of Hoa Son commune. Avoid dropping material on transit.

- Need traffic signs at the area of Hoa Son commune People's Committee.





2. The route to transport materials to reservoirs passes Vien Quang temple: This is a spiritual area, usually crowded with people who sing in the holidays, day 1, 15 lunar calendar.

- In the holidays, day 1, 15 lunar calendar of Vien Quang pagoda is often crowded with people and Buddhists, so the process of transporting materials can cause traffic congestion and unsafe traffic for Vien Quang pagoda area.

- Notify local authorities and pagodas management about the progress of lake repair.

- Means of transport must meet the standards and at the same time do not carry over load, causing damage to the road. Need to limit the use of whistle in the transport process through Vien Quang temple. Avoid dropping material on transit.

- Need a traffic sign in the area of Vien quang pagoda

- Limiting the transportation of materials on holidays, 1, 15 lunar calendar.

PMU, Construction Supervision Consultant (CSC), DONRE and local communities

11, 3/9 reservoir

3. The area near the lake has 23 households living downstream of the dam, along the lake management road. The status of houses of households is a solid grade 4 house. These households have no households doing business in services. Households mainly grow vegetables and fruit trees in gardens and animal

- These households directly use reservoir water to irrigate and produce in their gardens, so when the construction project can affect the amount of irrigation water of these households.

- Notice to local authorities and households living near the dam on the progress of lake repair.

- The construction process can apply measures to build dikes to prevent water from draining out of the lake. On the other hand, households have drilled wells, and




husbandry is mainly chickens and ducks in small quantities providing food for the family.

the area for growing small vegetables and fruit trees and livestock is small so households can still use the water in the lake to ensure irrigation and livestock or use water sources borehole.

12, 271 reservoir

2. Roads for transporting materials and road for operation and management are also routes for people to transport glue and eucalyptus when harvesting. Time for harvesting Acacia and Eucalyptus before April and before November 15 every year. Peak vehicle traffic during this time from 10-12 vehicles / 1 day.

- Road construction activities, the main dam will affect traffic and travel of people. Disrupting the transport of agriculture and forestry of people.

- Impacts can occur: public security disorder if the vehicles do not give way to the vehicles of local people

- There is a plan for traffic management, ensuring traffic for the community, perform construction of each position;

- Prior notice to the local community using the road of the project before construction;

- There are detailed safety instructions when going through this route during construction

- Do not contain construction materials, waste stone and soil on the road to minimize the use of road surfaces during construction

- Use the site signs, traffic signs in the shipping area

- Give way to the means of transporting farmers' products.

- Be gentle and friendly with local drivers


13, La Nga

3. Roads for transporting materials and road for operation and management are also

- Road construction activities, the main dam

- There is a plan for traffic management, ensuring traffic for

Contractors PMU, Construction



reservoir

routes for people to transport glue and eucalyptus when harvesting. Time for harvesting Acacia and Eucalyptus before April and before November 15 every year. Peak vehicle traffic during this time from 7-8 vehicles / 1 day


will affect traffic and travel of people. Disrupting the transport of agriculture and forestry of people.

- In the past, there was a drowning incident in the La Nga reservoir area. Therefore, in the process construction, if there is no strict control, drowning can happen to children playing in the subproject area or with construction workers on site.

the community, perform construction of each position;

- Prior notice to the local community using the road of the project before construction;

- There are detailed safety instructions when going through this route during construction

- Do not contain construction materials, waste stone and soil on the road to minimize the use of road surfaces during construction

- Use the site signs, traffic signs in the shipping area

- Give way to the means of transporting farmers' products.

- Be gentle and friendly with local drivers

- Arrange workers 'camps in high areas, workers' quarters should be designed in stilt houses, with canvas (wall) covered around

- Workers are forbidden to bathe in reservoirs if they cannot swim or prioritize mobilizing workers who can swim



Tiểu dự án Sửa chữa và nâng cao an toàn đập (WB8) tỉnh Nghệ An

7.2.4. Mitigation measured in operation phase

441. After the completion of the construction works, the reservoirs will ensure the water capacity according to the designs and ensure irrigation planning for downstream agricultural cultivation. The solutions related to the safety and operation of reservoirs are discussed further in the "Dam Safety Report" of the same subproject.

Table 74: General mitigation measures for impacts during operation phase

Impact Mitigation measures

Responsibility for

implementa tion

Responsibility for

monitoring

Falling into reservoirs, drowning

- Equipping warning signs and installation of dangerous warning system on the dam areas.

- Disseminating drowning risk to the community along the reservoirs.

Reservoir owners

Department of Agricultural and Rural Development, local authority and community

Repair and maintenance

- Informing the downstream people about the annual repair and maintenance plans.

- Performing periodic maintenance and repairs during the shortest period of time and at the time of the lowest water demand.

- Performing measures to maintain water supply during repair to ensure there is no disruption in water supply.

Reservoir owners


Regulation of reservoirs and flood discharges in case of big floods affecting downstream

- Preparing emergency response plans as part of the dam safety reports.

- The Management and Operation Unit should timely and accurately inform the flood discharge plan for the community to actively get informed and respond.

- At risky times like in rainy season, it is necessary to appoint persons to regularly monitor, to ensure proper regulation of water sources.

- Building safety corridors for flood discharge on the basis of impact scenarios. The specific solutions are detailed in the dam safety reports and emergency response plans.

Reservoir owners


Disaster risk causes unsafety

- The Management Units of Reservoirs regularly check the reservoir safety.

- Performing proper operation procedures to ensure the safety of the reservoirs.

- The Management Units of Reservoirs closely coordinates with the Commune People's Committees and the local people to promptly report the risks associated with dam safety in order to take timely corrective measures.

- Local people and local authorities take initiative in community-based coping strategies.

Reservoir owners



Impact Mitigation measures

Responsibility for

implementa tion

Responsibility for

monitoring

- Developing scenarios for predicting the extent of dam breakage effects, options for human evacuation, solutions for life and community property in emergency situations, etc. Details are included in the Dam Safety Report and the Emergency Response Plan of the Subproject.

Increased use of fertilizers and pesticides

- Planning for implementation of integrated pest management (IMP)

- The management board of the lake should coordinate with Nghe An Provincial Plant Protection Department to incorporate guidelines on the use and collection of pesticide waste in community consultation sessions and awareness raising meetings of people on pesticides

- Refer to the list of pesticides allowed to use and enhance the use of alternative biological products

Department of Agricultural and Rural Development

Local authority and community

7.3. Implementation arrangement

7.3.1. Project management

Central level

442. The Ministry of Agriculture and Rural Development (MARD) is responsible for the implementation and management of the entire project. Provinces will be responsible for carrying out repair and upgrade of the dams under Component 1 and MARD will coordinate activities with the Ministry of Industry and Trade and MONRE under Component 2. The Central Project Management Board (CPMU) under MARD is responsible for coordinating and supervising the overall project. The implementation of repairing and preparing dam safety plan, including protection and commissioning, is focused on the provincial government. Provincial People's Committee and Department of Agriculture and Rural Development (DARD) is the leading agencies at provincial level. Provincial People’s Committee and Department of Agriculture and Rural Development are the presiding units at provincial level. The Provincial Project Management Unit (PPMU) is responsible for managing and supervising the works with support from the CPMU.

443. The project management unit at central level will assist in the implementation of the projects by the environmental and social technical support unit; In addition, an independent consultant unit is hired by CPMU to evaluate the implementation of environmental safeguard policy of the entire project every 6 months. This is the organization selected through the competitive process to provide support and quality assurance to the central level in the implementation process. This includes support to project management unit at the central level in reviewing and adjusting when needed and re-implementing the development framework during the project implementation to provide a general framework for national programs. This process will be considered in accordance with the context of Decree 72 to assist MARD in establishing the necessary systems for the implementation of the National Dam Safety Program.

Provincial level

444. The People's Committee of Nghe An province assigns the Department of Agriculture and Rural Development to carry out the project in the area, establish the WB8 Provincial Project Management Unit (PPMU) to carry out the bidding, supervise the construction; implement resettlement action plan, environmental and social action plan and these actions and plans must be in line with the overall framework of the overall project. The PPMU will be supported by technical and environmental consultants from the CPMU. Project implementation organizations are presented in the


following diagram.

Figure 3: Structure of environmental management and supervision organization

(Source: DRSIP Framework for Social Monitoring, 2015)

7.3.2. Roles and responsibilities for environmental and social safeguard management

445. Regarding regular investment monitoring activities, the CPMU together with local environmental authority will determine whether the implementation of the project meet all the requirements in the environmental and social management framework, socio-environmental impact assessment report and environmental management plan. This agency will conduct field survey at different stages of the project to confirm that the social and environmental management plan and the environmental and social monitoring plan are being fully implemented. A monitoring report including environmental and social management issues will be included in the overall field report. The assigned environmental and social specialists are responsible for preparing quarterly and annual reports on major project implementation steps, outputs and results of environmental management actions implemented for all investments throughout the project cycle.

446. The CPMU requires the PPMU to have a corresponding environmental component in its investment, including significant mitigation activities, and to mention significant environmental incidents that have occurred. All PPMUs must include the environmental component in all reports prepared submitted to the World Bank.

447. Stakeholders should be fully aware of the mechanism for implementing ESIA in project investments. This will be very important in supporting and evaluating their role in environmental monitoring and evaluation of the subproject activities. Organizational chart during ESIA implementation is presented in the following Figure.

Figure 4: Organizational chart of subproject safeguard performance


448. Roles, implementation responsibility and monitoring of ESMP implementation by stakeholders are shown in the following table.

Table 75: Roles and responsibilities of stakeholders

Community / Organization Responsibility

Central Project Management Unit (CPMU)

- Overall management and coordination of the project;- Contact the implementing agencies to implement all project

components;- Coordinate with WB to provide environmental and social

consulting services for the project;- Assist the RP-PMU (Resettlement Compensation Board) to

update the RPs for the project components;- Synthetize environmental and social reports submitted to

relevant ministries and WB; and- Recruit and supervise independent consultancy units

(consultants) to conduct social environment monitoring. Independent monitoring consultant

- Independent environmental and social consultants will assist the CPMU in carrying out its tasks, especially in updating and implementing the resettlement plan and social and environmental management plan. Similarly, consultant also provides interventions for training and capacity building if


Community / Organization Responsibilityneeded and technical assistance in the implementation of environmental and social policies and updating of the resettlement plan.

Investor, Provincial Project Management Unit (PPMU)

- The PMU will be responsible for monitoring the overall implementation of the subproject, including environmental compliance of the subproject. The PMU will be responsible for the final implementation of the EIA and the environmental performance of the subproject during the construction and operation phases.

- Specifically, PMU will: (i) coordinate closely with the local authorities in the participation of the community in the process of preparing and implementing subproject; (ii) monitor the implementation of the environmental protection plan, including mainstreaming of environmental management plan into detailed technical design, bidding documents and contract; (iii) ensuring that an environmental management system is established and operated properly; (iv) be responsible for reporting on the implementation of the environmental and social protection plan to the Department of Environmental and Natural Resource and the World Bank.

- To be effective in the implementation process, the PMU will assign environmental staff (ES) to support the environmental aspects of the subproject.

Environmental monitoring and supervision unit

- Be set up by the investor to evaluate the environmental status of the subproject, assess the environmental quality during the subproject construction process and monitor the compliance with the environmental management plan set out in the EIA.

Environmental and social staff of the PMU (ES)

- Socio-environmental officer is responsible for monitoring implementation of World Bank's social and environmental safeguard policies in all phases and progress of subproject. Specifically, Socio-environmental officer will be responsible for: (i) helping PMU incorporate ESMP into detailed technical designs and civil engineering tenders and contract documents; (ii) helping PMU integrate its monitoring responsibilities and monitoring of ESMP into TORs, tenders and contract documents to construction supervision consultant when necessary; iii) providing relevant inputs for consultancy selection process; (iv) reviewing reports submitted by monitoring consultant and safety consultants; (v) conducting periodic site inspections; (vi) helping PMU solve social and resettlement issues of sub-project; and (vii) preparing environmental and social performance section on the progress and review reports to be submitted to the DONRE and the World Bank.

Construction supervision consultant

- Construction supervision consultant will appoint socio-environmental staff in charge of regular monitoring and supervision of all construction activities and ensure that the Contractor is in compliance with contractual requirements and ECOP. Construction supervision consultant will recruit enough qualified employees (e.g., environmental engineers) with comprehensive knowledge of environmental management and project construction to carry out mandatory tasks and supervise performance of Contractors.


Community / Organization Responsibility- Construction supervision consultants will also assist PMUs in (i)

reporting and maintaining close coordination with local communities, and (ii) strengthening capacity of civil contractors.

Bidder

The Bidder shall submit to PPMU the following additional documents in its Bid:Code of Conduct (ESHS) - The Bidder shall submit its Code of Conduct that will apply to

its employees and subcontractors, to ensure compliance with its Environmental, Social, Health and Safety (ESHS) obligations under the contract.

- In addition, the Bidder shall detail how this Code of Conduct will be implemented. This will include: how it will be introduced into conditions of employment/engagement, what training will be provided, how it will be monitored and how the Contractor proposes to deal with any breaches

Management Strategies and Implementation Plans (MSIP) to manage the (ESHS) risks- The Bidder shall submit Management Strategies and

Implementation Plans (MSIP) to manage the following key Environmental, Social, Health and Safety (ESHS) risks. Traffic Management Plan to ensure safety of local

communities from construction traffic; Water Resource Protection Plan to prevent contamination

of drinking water; Boundary Marking and Protection Strategy for

mobilization and construction to prevent offsite adverse impacts;

Strategy for obtaining Consents/Permits prior to the start of relevant works such as opening a quarry or borrow pit.

Contractor - The contractor shall assign Environmental and Social Staff(s) to carry out Environmental and Social mitigation measures proposed in the ESMP.

- The Contractor shall be required to submit to PPMU/CSC for approval, and subsequently implement, the Contractor’s Environment and Social Management Plan (C-ESMP), in accordance with the Particular Conditions of Contract Sub-Clause 16.22, that includes the agreed Management Strategies and Implementation Plans.

- The Contractor is required to appoint a competent individual as the contractor’s on-site Safety and Environment Officer (SEO)

2 The Contractor shall not commence any Works, including mobilization and/or pre-construction activities (e.g. limited clearance for haul roads, site accesses and work site establishment, geotechnical investigations or investigations to select ancillary features such as quarries and borrow pits), unless the Project Manager is satisfied that appropriate measures are in place to address environmental, social, health and safety risks and impacts. At a minimum, the Contractor shall apply the Management Strategies and Implementation Plans and Code of Conduct, submitted as part of the Bid and agreed as part of the Contract. The Contractor shall submit, on a continuing basis, for the Project Manager’s prior approval, such supplementary Management Strategies and Implementation Plans as are necessary to manage the ESHS risks and impacts of ongoing works. These Management Strategies and Implementation Plans collectively comprise the Contractor’s Environmental and Social Management Plan (C-ESMP). The C-ESMP shall be approved prior to the commencement of construction activities (e.g. excavation, earth works, bridge and structure works, stream and road diversions, quarrying or extraction of materials, concrete batching and asphalt manufacture). The approved C-ESMP shall be reviewed, periodically (but not less than every six (6) months), and updated in a timely manner, as required, by the Contractor to ensure that it contains measures appropriate to the Works activities to be undertaken. The updated C-ESMP shall be subject to prior approval by the Project Manager.


Community / Organization Responsibilitywho will be responsible for monitoring the contractor’s compliance with Code of Conduct and MSIP which is set out in the Section VII – Works’ Requirements of SPDs.

- Take actions to mitigate all potential negative impacts in line with the objective described in the CESMP.

- Actively communicate with local residents and take actions to prevent disturbance during construction.

- Ensure that all staff and workers understand the procedure and their tasks in the environmental management program.

- Report to the PPMU and CSC on any difficulties and their solutions.

- Report to local authority and PPMU and CSC if environmental accidents occur and coordinate with agencies and keys stakeholders to resolve these issues.

Local community

- Community: As a practice of Viet Nam, communities have rights and responsibilities to regularly monitor environmental performance during construction phase to ensure their rights and safety are adequately protected and mitigation measures are taken effectively by contractors and PMUs. In the event of an unexpected incident, they will report to the monitoring consultant and PMU

Provincial People's Committee, District People's Committee, Provincial DONRE

- Supervise subproject implementation as recommended by DONRE and PMU to ensure compliance with Government policies and regulations. DONRE is responsible for supervising compliance with the Government's environmental requirements

7.4. Environmental Compliance Framework

449. The tasks of contractors, environmental safety staff and monitoring consultants stated here but not defined in SPDs should be included in requirements of the Project Owner (Part VII of SPDs).

7.4.1. Environmental tasks of the Contractor3: 450. The contractor firstly must comply to minimize impacts that may result from subproject construction and secondly apply ESMP mitigation measures to prevent losses and inconvenience to local community and environment caused by impacts during construction and operation phase.

451. Remedial measures that cannot be effectively implemented during construction shall be conducted upon completion of the work (and before acceptance of work completion)

452. Contractor’s tasks include but not limit to:

- Compliance with related legal requirements on environment, public health and safety;

- Working within required scope of contract and other tender conditions;

3If the Contractor is not/does not perform any of the ESHS obligations or works under the Contract, the value of the work or obligation determined by the Project Manager may be withheld until the work or obligation is made and / or repair or replacement costs as determined by the Project Manager may be withheld until the repair or replacement is completed. Not implementation includes but not limit as follows:

Do not comply any obligation or work of ESHS described in the requirement of the works, including: working outside the land plot, dust obey the allowable limit, dot not keep the status of public roads in safe condition, damage to vegetation, pollution of water resource or sedimentation, pollution of soil due to lubricant, waste of people, damage to archeology or cultural heritage, pollution of air due to fire, not allowed and not effective;

Do not frequently re-check C-ESMP and / or do not update C-ESMP timely and effectively to hand issues of ESHS or forecast risk of impacts;

Do not implement C-ESMP; Do not have acceptance/ appropriate license before implementing works or relevant activities; Do not submit the ESHS report (as described in Annex C of SPD), or do not submit report timely; Do not implement handling measures in accordance with guideline of engineer during the regulated time (for

example of handling the incompliance).


- Arrange representatives of construction team to join site inspection conducted by environmental officer from monitoring consultant;

- Carry out any remedy instructed by environmental officer from project management unit and monitoring consultant;

- In case of non-compliance/inconsistency, investigation must be carried out to propose mitigation measures and remedies shall be conducted to minimize environmental impact;

- Stop construction activities that generate negative impacts upon receiving instruction of environmental staff of project management unit and monitoring consultant; propose and implement remedies and conduct alternative construction methods, if needed, to minimize environmental impact. Non-compliance by contractor will result in suspension of construction and other penalties until non-compliance is properly addressed following requirements of ES of project management board and monitoring consultant.

7.4.2. Contractor’s safety, social and environmental officer

453. The contractor shall be required to designate eligible staff(s) to act as safety, socio -environmental officer. Safety, social and environmental officer must be properly trained in environmental management and must possess necessary skills to transfer environmental management knowledge to all contract employees. Safety, social and environmental officer will be responsible for monitoring contractor’s compliance with ESMP requirements and environmental specifications. The task of safety, social and environmental officer will include but not limit to the followings:

- Conduct environmental site inspections to assess and audit practices, equipment and working methods of contractors on pollution control and environmental mitigation measures implemented;

- Monitoring compliance with environmental protection measures, pollution prevention and control measures and contract requirements;

- Monitoring the implementation of environmental mitigation measures;

- Preparation of audit reports for environmental conditions of the site;

- Investigate complaints and propose corrective measures;

- Advise contractors on measures to prevent environmental pollution; raise awareness and remain proactive;

- Propose appropriate mitigation measures for contractors in case of non-compliance. Implement additional monitoring of non-compliance guided by ES of PMU and monitoring consultant;

- Inform contractors and ESs (to PMU and monitoring consultant) about environmental issues; submit ESMP Implementation Plan of Contractor to ES of PMU and monitoring consultant and relevant agencies, if requested;

- Keep a detailed record of all.

7.4.3. Social and environmental monitoring during construction phase (Monitoring Consultant)

454. During the construction phase, monitoring consultant eligibly reports to PMU for environmental monitoring. Monitoring consultant will assign environmental and social staff in charge of monitoring and supervising all construction activities to ensure that the mitigation measures applied in the ESMP are properly implemented and help to minimize negative environmental impact caused by subproject. Monitoring consultant will provide sufficient environmental monitoring engineers with comprehensive knowledge of environmental protection and construction project management to perform mandatory tasks and monitor performance of contractors. Specifically, environmental and social officer of motoring consultant will:

- On behalf of PMU to review and evaluate whether the design meets the requirements of the ESMP mitigation and management measures;


- Supervise contractors' environmental management systems, including performance, experience and environmental issues troubleshooting, and provide guidance on remedial measures;

- Review implementation of ESMP by contractors; verify and confirm environmental monitoring procedures, parameters, monitoring location, equipment and results;

- Report status of ESMP implementation to PMU and prepare environmental monitoring report during construction phase;

7.4.4. Compliance with contract requirement and legal regulations

455. Construction activities not only comply with the requirements of environmental protection and contract pollution control but also comply with the Law on Environmental Protection and Pollution Control of the Socialist Republic of Vietnam.

456. All reports on modality method are submitted to monitoring consultant and PMU by the Contractor for approval to see if there are sufficient environmental protection and pollution control measures. Monitoring consultant and PMU will also review progress and program of the works to check that relevant environmental laws have not been violated and may prevent any possibility of violating the law.

457. The contractor will make copies of the documents related to safety, social and environmental officer and environmental officer of monitoring consultant and PMU. Document must include at least the updated work progress report, updated working methods and other license / permit applications in accordance with the Environmental Protection Action and all valid permits / licenses. Safety, social and environmental officer and environmental officer will also have access, on request, to the Site Log.

458. After reviewing documents, Safety, social and environmental officer or environmental officer will advise PMU and contractor on non-compliance with contractual requirements and legal regulation on environmental protection and pollution control for their implementation of the next actions. If safety, social and environmental officer or environmental officer concludes that status on the permit/ application of the permit and any prepared environmental protection and pollution control works may not comply with construction methods or may result in violation of requirements on environmental protection and pollution control, they will advise the contractor and PMU accordingly.

7.4.5. Report System

459. In addition to the progress report, the Contractor will also provide a report on environmental, social, health and safety indicators listed in Annex B of the SPDs. In addition to the Annex B report, the Contractor shall also promptly notify PMU of any incidents in the following categories. Full details of such incidents will be provided to PMU within agreed time frame.

- Confirm or likely to violate any international law or agreement;

- Fatality or serious injuries;

- Significant adverse effects or damage to private property (e.g. car accident, damage caused by flying stones, working outside the territory)

- Major pollution of living water or damage to or destruction of rare or endangered habitats (including protected areas) or species;

- Any allegations of sexual harassment or sexual misconduct, child abuse, pollution or other violations involving children.

Table 76: Requirements on report system

No Preparation of report by Submitted to Frequency

1 Contractor Monitoring Consultant

ESMP implementation report, including environmental, health and safety issues, Frequency of reporting: weekly or monthly;Report incidents immediately

2 Construction supervision PPMU Monthly report on ESMP implementation


consultant

monitoring, reporting frequency: monthly;Report incidents immediately;Report according to environmental issues, health and safety arising at the request of PMU

3 Community supervision board PPMU

When the community has complaints about the implementation of the subproject safeguard policies

4Consultants implementing monitoring of environmental quality

PPMU

Every 3 months according to the frequency of monitoring;Monitoring when there are environmental incidents

5 PPMUDepartment of

Natural Resources and Environment

Every 6 months according to Government regulationsImmediately report incidents, or when further requests are made

6 CPMU WB

Every six months complies with Section II of the Loan Agreement.Report incidents immediately or when there are additional requests for content that changes or needs clarification

7.5. Grievance redressing mechanism

460. Complaints related to subproject issues will be addressed through negotiations to reach the consensus. A complaint will go through three stages before it can be sent to the court. The executing agency will pay all administrative and legal fees related to the acceptance of the complaint. This cost is included in the subproject budget. The procedures for handling complaints shall be as follows:

7.5.1. Complaints and complaint settlement procedures

The first level, CPC/Ward PC:

461. An affected household can send his / her complaint to any member of the ward / commune People's Committee, through the village head or directly to the commune / ward People's Committee, in writing or verbal. The above member (s) of the People's Committee or village head will inform the commune / ward People's Committee of the complaint. The commune / ward People's Committee will directly work with the affected household above and will decide to settle the complaint after five days from the date of receiving the complaint (it can take 15 days in mountainous or remote areas). The Secretariat of the People's Committee of the commune / ward is responsible for compiling and recording all complaints they are dealing with.

462. After the People's Committee of the ward / commune issues its decision, the relevant household can appeal within 30 days. In case the second decision is issued but the household above is still not satisfied with the decision, the household can appeal to the People's Committee of the city / district / town (City’s PC).

The second level, DPC, Town PC and City’s PC:

463. After receiving a complaint from a household, DPC will have 15 days (or 30 days in the case of remote areas) to resolve the case. The District People's Committee is responsible keeping records of all complaints that it handles. When the DPC makes a decision, the household can appeal within 30 days. In case the second decision has been issued and the household is still unhappy with the decision, they can appeal to the Provincial People's Committee.

Level 3, PPC:

464. Upon receiving the complaint from the household, the PPC will have 30 days (or 45 days for remote areas) to resolve the case. The PPC is responsible for submitting and keeping documents for all submitted complaints.

465. After the PPC issues the decision, the household can appeal within 45 days. In case the second decision is issued and the household is still unhappy with the decision, they can appeal to the court


within 45 days. After that, PPC will have to send compensation to the account.

Level 4, Provincial Court:

466. In the event that a complainant sends his or her case to the provincial court and court rules are helpful for the complainant, the provincial government will have to increase the compensation level. In the case of a court judgment in favour of the PPC, the complainant will be returned the amount paid to the court.

467. Decision on redressing compliant will be sent to the complainant and the stakeholders and publicly posted in relevant PCs. The compliant will receive judgment three days after having complaint redressing result from ward/commune/town and seven days at district or provincial levels.

468. In order to minimize the number of complaints at the provincial level, the PMU will coordinate with District Compensation Committee to participate and advise on redressing the complaint and respond to the complainant. The role and capacity of PMU is to provide compensation, support and resettlement to affected households and displaced persons.

469. Human Resources: Staff in charge of environment and resettlement selected by the PMU will design and maintain a database of subproject-related complaints from affected households, including information such as the nature of the complaint, the source and date of receipt of the complaint, the name and address of the complainant, the action plan and the current status.

470. For verbal complaint, Receiving and Reconciling Board will record the complaint in a complaint form in the first meeting with affected person.

7.5.2. Contractor and construction supervision consultant

471. During the construction process, the GRM will be also managed by contractors under the supervision of CSC. Contractors will inform affected communities and communes about the availability of GRM to handle complaints and concerns about the subproject. This will be done through community consultation and information disclosure process whereby contractors will contact affected communities and related agencies on a regular basis. Meetings will be held at least quarterly and monthly information brochures will be announced. The announcements will be made on local media to disseminate about coming activities.

472. Every complaint and corresponding action implemented by the contractor will be recorded in safeguard monitoring report of the subproject. Complaints and requirements on compensation will be submitted as follows:

- By verbal: directly to CSC and/or safeguard officials or representative of contractor in the site office;

- By writing: handing over or sending complaint letter to the designated address;

- By phone, fax, email: send to CSC, employee or safeguard representative of the contractor.

473. When receiving a complaint, CSC, staffs or safeguard representative of the contractor will register the complaint in the complaint file and maintain diary of the events related to the complaint until the complaint is resolved. Immediately upon receipt, four copies of the complaint will be prepared. The original copy will be kept on file, one copy will be used by the contractor's safeguard staff, one copy will be sent to the CSC and the fourth copy will be sent to the PMU within 24 hours from the time of receiving complaint letter.

474. Recorded information on the complaint includes:

- Date and hour of complaint;

- Name and address of the complainant;

- Brief of complaint;

- Actions taken to resolve the complaint, including person contacting and finding at each step in the complaint handling process;

- Date and time when the complainant is allowed to contact to resolve;


- Final decision on the complaint letter;

- Date, time and method that the complainant is informed;

- Signature of the complainant when his/her complaint is resolved.

475. Minor complaint will be processed within one week. Within two weeks (and every week thereafter), a written response will be sent to the complainant (by hand, post, fax, e-mail) indicating procedures which are conducted until now.

476. The main objective is to solve the problem as quickly as possible by the simplest means, involving as few people as possible, and at the lowest level as possible. Only if a problem cannot be resolved at the simplest level and / or within 15 days, other functional agencies will be involved. Such situations may arise, for example, when the amount paid cannot be resolved for the damage, or the cause of the damage is determined.

7.5.3. Grievance redress mechanism of the WB

477. Community and individual believe that if they are adversely affected by a project funded by World Bank (WB), they can send their complaint to the grievance redressing mechanism at subproject level or complaint redressing board of WB. This organization ensures that recorded complaint will be quickly considered to resolve issues related to the subproject. Subproject affected community and individual can send their complaint to external monitoring board of WB to determine if bad effect is happened or not due to not complying with policies and procedures of the WB. Complaints are considered in any time if the complaints are paid attention and the PMU will be responsible for responding. In order to know information on how to send complaint to the grievance redressing service of WB, please refer to: www.worldbank.org/grs. In order to know information on the way to send complaint letter to Inspection Board of WB, please refer to: www.inspectionpanel.org.

7.6. ESMP Implementation plan

7.6.1. ESMP Implementation Plan of the Contractor

478. Upon contract signing, based on the ESMP of approved subproject and construction method, the construction plan has been approved by monitoring consultant and the PMU, the Contractor shall prepare Contractor’s ESMP (C-ESMP) for the package and submit to monitoring consultant for review and approval.

- After the C-ESMP has been approved by monitoring consultant, the contractor shall take measures to mitigate environmental and social impacts on site.

- The C-ESMP will be published at worker camps and site offices to disseminate information on mitigation measures to workers.

- Make public information board at the entrance of construction site with available addresses, representatives, phone numbers of the concerned parties for monitoring by local community and contact when needed.

- Assign staff in charge of environment and safety, training and providing protective equipment, periodical health checks for workers;

- Survey and check on-site environmental status, report to monitoring consultant if there are any significant differences compared to base environment.

- Sign contracts with authorized units to treat domestic wastes, hazardous waste, and supply clean water.

- Manage workers and construction equipment and provide new certificates/permits in case of expiration.

- Implement ESMP and update, and submit to construction supervision consultant for approval if any changes before applying.

- Coordinate with PMB and construction supervision consultant to redress complaints of local people on environmental and safety issue of the package in a timely manner.

- Monthly report on ESMP implementation of the package.


http://www.inspectionpanel.org/

http://www.worldbank.org/grs


7.6.2. Subproject commencement and personnel

479. The contractor's staff in charge of environment protection must be an environmental engineer or one with related expertise and must have an occupational health and safety certificate and work full-time on site.

480. Provide trainings on occupational health and safety and regular health checks for workers.

7.7. Capacity development and training plan

7.7.1. Training on safeguard policies

481. Nghe An DARD has implemented projects funded by the World Bank, so there is a certain understanding of the WB's safeguard policy requirements. The PMU established under Nghe An DARD for the implementation of this sub-project has appointed a staff to be responsible for implementing the environmental safeguards of the subproject. However, this officer has not yet grasped the requirements of the Bank's safeguard policy. As a result, the environmental officer has participated in World Bank safety training courses organized by the World Bank and the CPMU at the early stage of project implementation. Training and capacity development are annually carried out through technical assistance activities of World Bank safeguard policy officers focusing on new safeguard policy requirements. As new environment, society, health and safety requirements are set out in the standard bidding documents, training in the environment, society, health and safety requirements will be provided by the World Bank's Safeguard Policy Officer to the environmental and social safeguard staff of the PPMU, the construction supervision consultant, the environmental and social safeguard staff of the contractor as soon as they are mobilized and the PPMU will be responsible for organizing the training in coordination with World Bank safeguard officers.

482. Such training courses will be held at the early stage of the subproject implementation process to ensure that the ESMP is properly integrated into the bidding document (and subsequently the contract). Technical assistance should be provided by experienced and skillful staff of construction supervision consultants, and implemented in accordance with the terms of reference including specific references to the development of the requirements of the investor for the standard tender. In addition, the types of training courses will be implemented as follows.

7.7.2. Occupational health and safety training

483. Provisions will be made to provide occupational safety and health training for all new employees to ensure they are informed of the basic regulations in the site on personal protection and prevention of colleagues from injuries.

484. Training will include basic hazard perception, specific hazards, safe work practices, and emergency procedures for fire, evacuation and natural disasters in appropriate manner. Any used particular hazard or color code will be considered in a thoughtful way as a part of the orientation training.

7.7.3. Orientation of visitors

485. If visitors are allowed access to areas with hazardous conditions or substances, orientation and control program for visitors will be established to ensure that visitors do not go into dangerous areas without being accompanied.

7.7.4. Training for new contractors and workers

486. The PPMU will ensure that workers and contractors, before starting new work, will receive adequate training and information so that they can understand the hazards of work and protect themselves from the hazards. Training will include:

487. Understand about materials, equipment and tools

- Understand about the hazards in operation and how to control them

- Potential risks to health

- Warnings to prevent exposure

- Sanitary requirements



- Wear and use clothing and protective equipment

- Appropriate response to extreme operating conditions, accidents and incidents

7.7.5. Basic training on occupational health and safety

488. A basic training program and intensive courses will be implemented as needed to ensure that workers are oriented towards the specific hazards of separated work tasks. Training will generally be provided to managers, supervisors, workers, and occasional visitors to risk and hazardous areas.

489. Workers in charge of first aid and rescue will receive special training not to intentionally exacerbate the exposure and health hazards to themselves and their colleagues. Training will include the risk of transmitting the disease through blood through contact with tissue and body fluids.

490. Through appropriate contractual terms and monitoring, the PPMU will ensure that service providers as well as contractual labors and subcontractors are adequately trained before commencement of work.

491. The PPMU will be responsible for coordinating with construction supervision consultant and officer in charge of environment of contractor to organize training courses above.

7.8. Environmental quality monitoring plan

7.8.1. The compliance monitoring

492. Environmental compliance monitoring is carried out to assess the compliance with operational standards and proposed national environmental norm and standards. The main purpose of the Environmental Compliance Monitoring is to ensure that all proposed mitigation measures are complied with by contractors during the construction, to early identify arising environmental issues and to timely propose additional mitigation measures.

- The PPMU and the CSC will monitor the compliance of the standards. The PPMU and the CSC will monitor the Contractors’ activities in accordance with the agreed mitigation measures. The results are summarized in the monthly reports.

- Local authorities and communities in 13 reservoir areas will perform monitoring tasks in accordance with the Government’s regulations, the Law on Environmental Protection 2014 and Decree No.80/2005/ND-CP regarding the regulations on investment community monitoring.

- In addition, the Contractors’ environmental safety staff will be responsible for day-to-day monitoring of labor safety and environmental sanitation and reporting to the CSC.

- The detailed monitoring plans will be prepared during the detailed design phase. Expenditures for the monitoring program will be included in the cost of the CESMP implementation.

7.8.2. Monitoring of environment quality

(a) Periodic monitoring

493. Ambient environmental quality monitoring program such as air, soil and water quality provides information that can be used to assess the effectiveness of pollution management strategies. A systematic planning process is recommended to ensure that the data collected are adequate for their intended purposes (and to avoid collecting unnecessary data). This process, sometimes referred to as a data quality objectives process, defines the purpose of collecting the data, the decisions to be made based on the data and the consequences of making an incorrect decision, the time and geographic boundaries, and the quality of data needed to make a correct decision. The ambient environmental quality monitoring program shall consider the following elements:

- Monitoring parameters: The monitoring parameters selected should reflect the pollutants of concern associated with subproject processes.

- Baseline calculations: Before the subproject is developed, baseline ambient environmental quality monitoring at and in the vicinity of the site should be undertaken to assess background levels of key pollutants, in order to differentiate between existing ambient conditions and subproject-related impacts.



- Monitoring type and frequency: Data on ambient environmental quality generated through the monitoring program shall be representative of the pollutants emitted by the subproject over time. Monitoring frequency and duration may also range from continuous to less frequent, monthly, quarterly or yearly tests.

- Monitoring locations: Ambient environmental quality monitoring may consists of off-site or fence line monitoring either by the subproject owner, DONRE, or by collaboration between both. The location of monitoring stations should be established based on the results of scientific methods and mathematical models to estimate potential impact to the receptors from an emissions source taking into consideration such aspects as the location of potentially affected communities.

- Sampling and analysis methods: Monitoring programs should apply national or international methods for sample collection and analysis, such as those published by the International Organization for Standardization (ISO). Sampling shall be conducted by, or under, the supervision of trained individuals. Analysis shall be conducted by entities permitted or certified for this purpose. Sampling and analysis Quality Assurance / Quality Control (QA/QC) plans shall be applied and documented to ensure that data quality is adequate for the intended data use (e.g., method detection limits are below levels of concern). Monitoring reports should include QA/QC documentation.

494. Noise monitoring may be carried out for the purposes of establishing the existing ambient noise levels in the area of the proposed subproject, or for verifying operational phase noise levels. Noise monitoring programs should be designed and conducted by trained specialists. Typical monitoring periods should be sufficient for statistical analysis and may last 48 hours with the use of noise monitors that should be capable of logging data continuously over this time period, or hourly, or more frequently, as appropriate (or else cover differing time periods within several days, including weekday and weekend workdays). The type of acoustic indices recorded depends on the type of noise being monitored, as established by a noise expert. Monitors should be located approximately 1.5 m above the ground and no closer than 3 m to any reflecting surface (e.g., wall). In general, the noise level limit is represented by the background or ambient noise levels that would be present in the absence of noise source(s) under investigation.

7.8.3. Monitoring frequency and parameters

Table 77: Summary of the contents of quality monitoring of environmental components in the construction phase and operation and maintenance

Environment Location Frequency Measured parameters

National Technical Regulations to be

applied I. Construction phase

Air quality, Noise, vibration

2 positions at each reservoir

Reservoir Don Hung and Ke Sat: 3 months * 1 time / 2 years of construction. The remaining reservoirs: 3 months * 1 time / 1 year of construction

SO2, NOx, CO, dust PM10, dust PM2.5 and microclimate, vibration and noise levels

QCVN 05:2013/BTNMTQCVN 26:2010/BTNMTQCVN 27:2010/BTNMT:

Surface water quality


Reservoir Don Hung and Ke Sat: 3 months * 1 time / 2 years of construction. The remaining reservoirs: 3

pH, DO, COD, BOD5, , NH4

+ -N, NO3

- -N, Fe, Coliform, turbidity, TSS

QCVN 08:2015/BTNMT


Environment Location Frequency Measured parameters

National Technical Regulations to be

applied months * 1 time / 1 year of construction

Construction waste water


Reservoir Don Hung and Ke Sat: 3 months * 1 time / 2 years of construction. The remaining reservoirs: 3 months * 1 time / 1 year of construction

pH, TSS, Grease QCVN 14:2008/BTNMT

II. Operation and Maintenance phaseMonitoring surface water quality at reservoir location


Once every 6 months duringthe first year first

pH, DO, BOD5, NH4

+, TSS, turbidity

QCVN 08:2015/BTNMT

Ecological indicators

Subproject area

Monitoring in the field and interviewing local people

Aquatic species

Note: - QCVN 05: 2013 / BTNMT - National technical regulation on ambient air quality- QCVN 26: 2010 / BTNMT: National technical regulation on noise- QCVN 27: 2010 / BTNMT: National technical regulation on vibration- QCVN 08-MT: 2015 / BTNMT: National standard on surface water quality- QCVN 09-MT: 2015 / BTNMT: National technical regulation on underground water quality- QCVN 14: 2008 / BTNMT: National technical regulation on domestic wastewater quality- QCVN 03-MT: 2015 / BTNMT: National regulation on the allowable limits of some heavy

metals in soil

(b) Incident monitoring

495. The purpose of this monitoring is to assess the level of pollution to land and watercourse due to accidental discharge such as discharge of wastewater and waste oil into nearby watercourse and land and make a timely decision on pollution control which would help reduce environmental risks.

496. An incident monitoring plan will be developed by CSC at the early stage of subproject implementation and submitted to PPMU for approval. This plan will identify the potential environmental risks due to accidental discharge of wastes such as wastewater and waste oil into nearby watercourse and land. The plan also defines manners to conduct this monitoring, such as competent personnel, equipment, monitoring locations and parameters, analysis method, dedicated laboratory, and cost estimates.

7.8.4. Dam safety monitoring

497. Once the water is accumulated and the dams start operating, the dam owners are responsible for monitoring the dam safety. This task is done by qualified independent specialists who are not involved in the investigation, design, construction or operation of the dams. After the dams are in normal operation, the regular inspection stages take place, including safety inspection of the dams before and after annual flood season in accordance with Government Decree No. 72/2007/ND-CP on Dam Safety Management.

7.9. Estimated cost

498. ESMP implementation costs will include: i) costs for implementation of monitoring program;


ii) Costs for environmental treatment works; iii) IPM program costs. The total CESMP implementation is estimated in the following table.

Table 78: Estimated costs for CESMP implementation monitoring and training

No. Items Cost (VND)1 Monitoring of CESMP implementation 391,597,8002 Costs for environmental treatment works 89,700,0003 IPM program costs 2,400,0004 Provision expenses (10%) 48,369,780 6 Total 532,067,580

499. The community involvement in the ESIA implementation is voluntary for the benefit of the community and people themselves. Therefore, people participating in the CESMP monitoring will not be paid. However, in order to encourage the community participation, the cost of materials and tools should be allocated to the monitoring activities to support selected community members to participate in the monitoring. According to Decision No.80/2005/QDTTg dated 18/4/2005 by the Prime Minister on the Regulation on Investment Community Supervision and the Joint Circular guiding the implementation of Decision No.80/2005/QD-TTg: "The cost of investment community supervision in the communes/wards is included in the estimated cost of the budget of the Fatherland Front at the commune level and deducted from the commune/district budget and financial support for dissemination, training courses, guidelines, preliminary and final reports. the provincial and district levels will reimburse from the cost estimate of the Front Fatherland at the provincial/district levels, which is deducted from the provincial budget".

500. The table below summaries the funding flow for the environmental quality monitoring and capacity building during the implementation of Nghe An Subproject.

Table 79: Budget source for ESMP monitoring

Contents Costs Budget source

(a) Implementation of mitigation measures during construction

Part of the construction contract WB

(b) Monitoring and supervision of compliance with safeguard policies during construction

Part of the cost of Construction Supervision Consultant (CSC)

Counterpart fund

(c) Operation of safeguard unit under PPMU

Part of the cost of the PMU Counterpart fund

(d) Ambient Environmental quality monitoring

Cost of renting environmental monitoring

Counterpart fund



Table 80: summary of mitigation measures

Phase Environmental and social issues

Mitigation measures Location Applied standards

Cost for mitigation

Agency being responsible for implementation

Agency being responsible for monitoring

Pre-construction phase1 Clearing of

plant on temporarily and permanently acquired land area

- Only conduct clearing on defined area. - Utilize plant waste to be fuel or material - Collect unused plant waste and transport to local dumping site- Restore the vegetation as soon as possible to maintain the landscape, microclimate condition, and habitat of local animals.

Sub-project area Compensation and site clearance cost

Head of affected household

PPMU and People's Committees of districts and communes

2 Permanent acquisition of 4.672,26 m2 of land.

Compensation, support and resettlement for people affected by losses of land, houses, income and assets. Implementation of site clearance compensation will comply with the subproject's updated resettlement plan.

The entire affected subproject area

Land Law No. 45/2013 / QH13, relevant decrees and circulars

Do not require the cost for compensation of damage. If there is change of impact scope for people in the detailed design stage, it will be updated in the updated RAP report

Subproject DPCs and CPCs

PPMU and local community

3 Risks from UXO clearance

Ensure safety distance and warnings for local people during the implementation in accordance with QCV 01:

The entire affected subproject area

QCVN 01: 2012 / BQPQCVN 02: 2008 / BCT

Cost for clearance of UXO

Unit under management of Military Zone IV

PPMU




Cost for mitigation



2012 / BQP- National technical regulations on clearance of unexplosive ordnance and ordinance 02: 2008 / BCT- National regulations on safety in transporting, preserving, using and destroying industrial explosive materials

Circular 146/2007 / TT-BQP

Construction stage1 The general

environmental and social negative impacts related to construction activities and specific impacts

- Environmental Codes of Practice (ECOP)- Measures to mitigate site-specific impacts

All affected subproject areas including construction sites, transport routes andborrow pit

Laws, decrees, circulars and current national technical regulations A Guideline to the Environment, Health and Safety of the World Bank

Included in construction costs

Contractor P PMUs, construction supervision consultant, independent monitoring consultant of the Central Project Management Unit, Provincial Department of Natural Resources and Environment, local communities,

Operation stage 1 Risk of

drowning- Equip warning signs and installing dangerous warning

Reservoir area Official Letter No. 5675 / BGDDT-

Operating cost of the reservoir

Dam owner Department of Agricultural and




Cost for mitigation



system at dams and reservoirs.- Disseminate information on the risk of drowning to the community along the reservoir.

GDTC dated 30 November 2017

Rural Development

2 Repair and maintenance may lead to lower downstream water level

- Inform people about the annual repair and maintenance plan. - Perform periodic maintenance and repair in the short period and at the time of the lowest water demand. - Implement measures to maintain water supply during the repair process to ensure that there is no disruption in water supply.

Reservoir area and downstream area

Decree 72/2007 / ND-CP

Operating cost of the reservoir

Dam owner Department of Agricultural and Rural Development

3 Regulating of reservoir, flood discharge in case of super flood affecting downstream

- Prepare an emergency response plan as part of the dam safety report- The management and operation unit should promptly and accurately announce the flood discharge plan so that the community can take initiative in grasping and responding to the plan.


72/2007 / ND-CP Operating cost of the reservoir





Cost for mitigation



- By the time of unsafety such as the rainy season, it needs to be assigned persons regularly monitoring to ensure proper water regulation.- Construct a safety corridor for flood discharging on the basis of scenario of forecasting impact level; Specific solutions are detailed in the Dam Safety Report and Emergency Response Plan.

4 Disaster risk causes insecurity

- The unit that manages the operation of the reservoirs regularly checks the safety of reservoir - Properly perform operation procedures to ensure the safety of the reservoir- The management unit of the reservoir works closely with the Commune People's Committee and the local people to promptly report on dam-related risks to timely propose remedial action. - People and local authorities take initiative in community-


72/2007 / ND-CP Operating cost of the reservoir





Cost for mitigation



based disaster preparedness planning - Develop scenarios for forecasting the extent of effects, options for migration, solutions for life and property of community in emergency situations. Detailed contents are included in the Dam Safety Report and Subproject Emergency Response Plan.

5 Increase in use of fertilizers and pesticides

Preparation and implementation of integrated pest management (IPM)

Sub-project area Law on Plant Protection and Quarantine 41/2013 / QH13Decision No. 2027/2015 / QD-BNN-BVTV

Cost for annual IPM training in locality

Division of agriculture extension of commune and district

Department of Agricultural and Rural Development


CHAPTER VIII: PUBLIC CONSULTATION AND INFORMATION DISCLOSURE

501. The current law on environmental protection of the GoV (Circular No. 27/2015/TT-BTNMT) on the contents of environmental impact assessment and the World Bank safeguard policy on (OP 4.01) requires that during EA report process, the subproject owner conducts public consultations with locally-affected people and local NGOs about the subproject’s environmental aspects and take their views into account. Public consultation and information disclosure have been conducted in two forms: i) organizing face-to-face meetings with locally-affected people, local NGOs, relevant management units, and authorities in the subproject area and ii) sending official letters and subproject documents for official consultation on the subproject’s environmental aspects to commune people's committees of the communes and in the subproject area. In addition, interviews with AHs in the subproject area are also conducted to get their feedback on the subproject implementation.

8.1. Public consultation

8.1.1. Contents and form of public consultation activities

502. Public consultations have been conducted in accordance with the guidelines of Circular No. 27/2015 / TT-BTNMT dated 29 May 2015 of the Ministry of Natural Resources and Environment and the World Bank. The purpose of the consultation is to inform the community and the stakeholders about the subproject, social and environmental impact aspects and mitigation measures of potential negative impacts. The consultation activities are to ensure that opinions of affected community and NGOs will be paid attention during the preparation and implementation process of the subproject.

503. Form of consultation: The PPMU has organized community consultation meetings in the subproject communes/towns. The actual time of the community consultation meetings is as follows:

Table 81: Summary of participants in the consultation meetings

District Commune Time Participants

Total Male Female

Quynh Luu Ngoc Son 8/10/2018 31 19 12Quynh Thang 8/10/2018 19 17 2

Yen ThanhTien Thanh 9/10/2018 32 20 12Hung Thanh 9/10/2018 20 17 3My Thanh 5/10/2018 34 24 10

Nghia Dan Nghia Loc 10/10/2018 29 20 9Nghia Thuan 10/10/2018 35 29 6

Nam Dan Nam Thanh 8/10/2018 30 27 3Do Luong Hoa Son 10/10/2018 33 12 21Nam Dan Van Din 12/10/2018 29 21 8

Thanh Chuong Ngoc Son 6/10/2018 26 13 13Tan Ky Ky Tan 7/10/2018 34 24 10

Total 352 243 109

504. Participants in community consultation sessions are representatives of local units and organizations such as: representative offices of People's Committees, in charge of neighborhoods, veterans' associations, women's associations and youth associations , Elderly Association ... and representatives of affected households.

505. In addition to organizing the meeting, Nghe An PPMU sent the official dispatch No. 02/DANN on January 3, 2018 of the Project Management Unit of Investment in Construction of Agricultural and Rural Development Projects in Nghe An province, accompanied by documents summary of the main investment items, environmental issues, environmental protection solutions of the subproject to the People's Committees and the Fatherland Front Committee 12 communes on asking for consultations in process of making subproject Environmental and Social Impact Assessment report. The opinions of the participants in the meeting will be expressed in the written replies of the People's Committees of communes (Specific contents are attached in the appendix of the Report).

8.1.2. Consultation results


506. After listening to the representative of the project, introducing the project scale, Technical plans of each construction item, as well as project impacts on the environment and proposed impact mitigation measures, attendees raised many questions as well as contributions to the project, mainly revolved around the issues presented in the following table.

Table 82: Concerns of affected communities

No. Concerns of affected communities Commitments of subproject owner

1

Upgrading the infrastructures - Repairing damaged canal alignments and dissipation basins, treating seepage in dam shoulders

PPMU will work with the local government, design consultants when they prepare the detail design for the work items. Maintaining and repairing roads and other public works that would be affected by the construction of the subproject.

- Some access roads to reservoirs are also rural transport roads for the residents living in upstream, so people wish the subproject upgrade these roads also.

- Extending dam surface roads to serve as transport roads connecting local villages, managing reservoirs and dams, and forest.- Making bridges over spillway is very important, serving the travelling of people, particularly for children going to school.

2

Social security

People want to participate in simple works in the subproject, particularly works related to the environmental and sanitary protection.

In the construction process and when the reservoirs are in operation, AHs would be given priority to contract for the works.

Managing well workers of construction contractors not to affect the community. Contractors when in field must register with local authority properly for temporary stay and leave.

PPMU will supervise closely the construction activities in accordance with contract terms and conditions to assure the social security and order in the subproject area during the construction period.

3 Related to design, construction activities

- It is noted that the construction of the subproject should avoid the cropping season of local people.

PPMU will coordinate with the District Land-fund development Center (DLFDC) to inform the local authority and people in the subproject area in different ways such as meetings, distributing materials to disseminate the implementation plan, public notification at communes and villages, broadcasting via mass media of villages and communes.

- Assuring the traffic safety when transporting construction materials or debris. - Providing warning signs or boards on construction sites and transportation roads. After the construction is completed, providing boards prohibiting rubbish dumping.

Contractor is required to commit to shielding materials, sludge from discharge, adherence to the tonnage of vehicles carrying materials and wastes when taking part in traffic in the area; In cases where the local infrastructure is damaged due to the cause of the transportation, the construction unit shall restore the original state of the local infrastructure.

- Prohibiting over-loaded vehicles to access to construction sites.- During construction, transportation must be assured because in most of the reservoirs there is only one single road passing through.


No. Concerns of affected communities Commitments of subproject owner- Designing dams in Dam Chieu reservoir must have protection handrails. When construction is carried out, the water source for irrigation must be assured for the production of people.Avoid not affecting clean water supply pipes of people.

4

Land acquisition, resettlement and compensation

Assets affected must be compensated, assisted satisfactorily, publicly, and transparently.

Carrying out in accordance with the approved RAP, assuring that compensation unit prices are replacement prices, DMS and compensation plans are publicly posted in CPCs and villages.

If the area of the remaining land is small, difficult to cultivate, that remaining land should be acquired.

PPMU will coordinate with DLFDC to determine the remaining land as requested in paper by AH in order to settle the issue in accordance with the provincial regulation on the norm applicable to the acquisition of the remaining land.

Relocating HHs from the right-of-way of dams.PPMU will work with local authority to execute the relocation of AH as provided for.

507. In addition, the recommendations of the people are summarized in the following table:

Table 83: Summary of consultation result and feedback of the subproject owner

No. Local authorities and people’s opinions Feedback 1 Nghia Loc (Hon Mat reservoir)

1. Mr: Ngo Sy Cuong, Chairman of People's Committee:: - Agree with the policy of repairing and improving dam safety in

Hon Mat lake- During the construction process, investors and construction units

are requested to strictly implement measures to minimize environmental impacts.

- Regularly work closely with local authorities in the implementation steps of the project

- No construction after 22:00 until 6 am the next day2. Mrs: Phan Thi Hieu – Commune cadastral official: - The construction does not affect the land acquisition by the

subproject implementation on the available land- During the construction process, the construction contractor is

requested to announce the construction schedule to the village, especially the Women's Union to arrange a suitable time for the family's production and housework.

- The subproject will organize close coordination with the People's Committee and timely inform the construction time to the people and will ensure that the mitigation measures are fully implemented.

2 Hung Thanh commune (Don Hung reservoir)1. Mr: Nguyen Van Phuc – Party cell secretary: - Don Hung Dam serves irrigation for Hung Thanh commune and

Lang Thanh commune with more than 2000 households. The land around the lake is hilly land, so it can affect the forest land of households.

2. Mr. Nguyen Viet Phong – Cadastral officer: - Currently using water does not provide enough water for

- The subproject would like to receive comments and will discuss with the FS consultant to adjust the design plan accordingly.


No. Local authorities and people’s opinions Feedback households, so it is necessary to expand the capacity of the reservoir by dredging, taking soil from the lake bed to dam

3. Mr. Tran Van Han: Chairman of the Fatherland Front- The repair and upgrading of auxiliary dams may affect residential

land of Lang Hung and Lang Thanh communes.- Covered soil can take soil from the lake. The disposal site can

use the vacant land on the side of the dam

- In case of affecting the land and property of the people, the project will have adequate compensation policies in accordance with the provisions of the project.

3 Quynh Thang commune ( Khe Dung reservoir)1. Mr. Le Van Nga - Chairman of People's Committee:- The bridge overflow should be used as a bridge for people,

because the flood season is often isolated and cannot be walked;- Should be informed before construction time for people to

arrange suitable planting;- If the project implementation affects land and crops, it should be

compensated adequately2. Mr. Tran Ba De - Hamlet neighbor 13:- Proposing investors and contractors to construct quickly so as not

to affect the people's life much;- If there are impacts on households' land, compensation must be

made according to the policy;- Does construction affect people below the dam?- Proposing investors to consider extending the management route

to help people move more conveniently.3. Mr. Bui Van Tien - Party Committee Secretary:- At present, the flow and capacity of reservoirs are not enough to

meet the demand, it is recommended to take reservoir soil to dam up the lake's capacity;

- Proposing the investor to consider the construction of an overflowing bridge with a residential road to help people travel and flood season more convenient

- The ground can be taken to the east of the lake, the material yard can use the football field of the commune;

- It is expected that the second quarter of 2019 will be completed when the farmers have finished harvesting, very convenient for the project.

- The subproject would like to receive comments and will discuss with the FS consultant to adjust the design plan accordingly.- Pay attention to safety, environmental and social requirements in contracts for contractors. And the implementation of mitigation measures needs to be ensured.- Investor will pay attention to compensation and land clearance issues in accordance with the project's policy.

4 Ngoc Son commune (Hoc Nghet)1. Mr. Ho Van Lap - Chairman of CPC:- Should be made of steel sewer wrapped in concrete to ensure

operation;- Dams with 2 valves to operate to ensure drainage;2. Mr. Ho Huu Tu - Chairman of farmer's household:- The lake bed is currently being filled and dredged so it dredges

the lake, dams the lake bed;- It is recommended to do valve door behind the drain;- Waste soil is dumped in the empty land of the commune.3. Mr. Tran Xuan Luan - cadastral officer- Currently the access road is available so it does not affect the

land of the people;- In the process of construction, investors and construction units

are requested to carry out the environmental protection measures and take measures to minimize impacts on people's lives;

- Regularly work closely with local authorities during the project

- The subproject would like to receive comments and will discuss with the FS consultant to adjust the design plan accordingly.- Pay attention to safety, environmental and social requirements in contracts for contractors. And the implementation of mitigation measures needs to be ensured.


No. Local authorities and people’s opinions Feedback implementation process

5 Nghia Thuan ( Khe Dua reservoir)1. Mr. Nguyen Quang Tien - Vice Chairman of the commune:- The dam has been built for a long time and has deteriorated, the

locality is very eager to repair the dam;- The current water reserve is not enough, so it is proposed to take

the reservoir soil to meet the criteria for embankment and to increase the water reserve;

- Proposal to consider design to improve reserves;- Examining construction measures to ensure adequate water for

the people during the construction period;- During the construction period, to ensure the load of mechanical

means to avoid affecting the road and signing commitments with the locality;

- Hire local workers to help create jobs for local people;- For workers' camps, to ensure environmental hygiene;- Vehicles carrying materials must cover and have regular

irrigation water.2. Mr. Cao Van Dan - Hamlet 5:- Taking reservoir soil and dams, reducing transportation means;- The construction unit should closely coordinate with the locality

to ensure order and security, ensure environmental hygiene during the construction process;

- Need to accelerate construction progress3. Mr. Bui Dinh Hoi - Hamlet 3:- The construction will affect the people so it is necessary to

minimize the impacts on the community;- Roads for people to travel daily should reduce construction time,

choose appropriate construction time, neatly gather materials4. Mr. Duong Ngoc Duc - the commune's main land- Does dam repair increase water storage and affect flood

discharge?5. Mr. Nguyen Minh Tu:- Need to identify borrowed land to build and build material yards.

- The subproject would like to receive comments and will discuss with the FS consultant to adjust the design plan accordingly.- The project is concerned about safety for the dam will ensure safety for people especially during the flood season- Pay attention to safety, environmental and social requirements in contracts for contractors. And the implementation of mitigation measures needs to be ensured.- Investor will pay attention to compensation and land clearance issues in accordance with the project's policy.

6 Tien Thanh commune (Ke Sat reservoir)1. Mr. Dang Xuan Ty - Chairman of People's Committee- The project is very practical to ensure safety for downstream

areas, the locality will support and create favorable conditions for construction works;

- The locality will arrange the disposal sites and material yards for the project;

- Dams irrigation for 2 communes with about 1000ha, so it will greatly affect downstream areas if incidents occur;

- Overflow bridge is very necessary to solve travel for people, especially in the flood season;

- Proposing to announce before the construction time for people to actively arrange production, change crops and seasons accordingly.

2. Mr. Le Van Hoi - 6B neighbor- People downstream from the commune are very convenient for

construction;- The lake is currently in a position to suggest taking the lake bed

to embank the dam body;- The project is very practical to the life of the people, people are

very much looking forward to the project soon;

- The sub-project will receive comments and will discuss with the FS consultant to adjust the design plan accordingly.- The project is concerned about safety for the dam will ensure safety for people especially during the flood season

- Investor will pay attention to compensation and land clearance issues in accordance with the project's policy.


No. Local authorities and people’s opinions Feedback - The left side of the dam may have a few households affected if it

spills.7 Ngoc Son (La Nga reservoir)

Commune president:- Introduction to the importance of lakes- Looking forward to building and repairing lakes to serve

production- There are 07 households around the dam, which may be affected

and need to be carefully considered if the impact is needed to compensate, support the right policies and people also consciously support the implementation project.

- The locality will create maximum conditions for clean ground as well as conditions for the project to be implemented as soon as possible.

- Making a 4m wide road as expected does not affect the land.Land officials:- People support the project, agreeing with the issues of advice.- The road is more than 1km away, if there is not enough width;

open it to production land, enough 3.5m.- About land: not violating anyone's garden land. Those who plant

trees on the dike must inform people, later- Local people are willing to support to speed up the process to

desire to finish early, to have water for people.- Calculation of plan for transporting materialsCommune Secretary:- Agree on the policy and agreement on environmental and social

solutions- Try to take advantage of local labor to benefit people- Note the plan of construction road, carrying materialsPeople:- The tree has been sold and replanted; the land belongs to the

family's forest garden. In the area where the dam is not replanted.- People support the project, is the wish of the people and the

locality.- Local officials:- Local create maximum conditions for the project: environment,

traffic, security and order- People agreed, agreed to support the project- Local areas to be cleared (trees) will create maximum conditions

8 Hoa Son (Khe Du reservoir)Chairman of Commune People's Committee (Thai Dinh Huong):- Repairing and upgrading lakes is a local desire to ensure safety

for downstream areas, for national highways and lakes under national highways.

- The lake has been built for a long time and has a phenomenon of seepage, water retention and high risk of unsafe.

- Lake irrigates an area of 50ha of rice and crops- The locality has no budget to repair, so the project is local

government and people are very excited.- Impact has no influence on the land of the people, because at the

foot of the dam to save it. Without building a manager, there is no need for land acquisition.

Cadastral and construction officials:- Long-term desire of local is to repair, reinforce and upgrade. The

locality has also tried to make a road to a concrete dam, but the

Consultants and investors receive local opinions.


No. Local authorities and people’s opinions Feedback dam face and body of the dam have no funding to do.

- In general, it is not convenient to recover land.- There are 02 tombs of Thai Van Hoa family (Ho Sen hamlet) and

Thai Dinh Huy (Van Yen village) with long, recently restored, locations upstream of the lake, near the water surface. Whenever there is flood or heavy rain, the two graves are flooded. The implementation of the project will not affect two graves.

Agricultural and transport officials:- Agree and support project guidelines. The project will contribute

to the local socio-economic development.- The impacts of construction process are but not significant, the

transportation of materials is convenient because of the National Highway 15 right away.

- Mainly a positive impact.- Looking forward to dredging to increase capacity but this is not a

project goal so there is no problem because the project helps to increase safety for downstream.

Representing the people:- Support the project and look forward to implementing it early in

the rainy season and increasing the ability to irrigate the local rice area.

- Unanimously relocate the graves in case if necessity but with the support of the project on funding

9 My Thanh (Tuan reservoir)Chairman:- The lake has been built for a long time and has been upgraded

and repaired many times but still has the risk of insecurity and local demand.

- Resettlement impacts: there is 01 elderly and commune household who has relocated to the old medical station land and other households have no impact.

- There are 4-5 sao of hamlet 12 will be flooded, if upgrading overflow will move this number to another place. However, if you do not raise the spill, it will not affect.

- The locality will create favorable conditions for the project and coordinate with the locality.

Vice president:- Local authorities want to upgrade the spillway but because the

project has no objectives, it is also unanimous with the plans to upgrade and repair according to the objectives of the project.

- 01 household is flooded in the rainy season; there is no road to enter the house, advised to transfer this household to another to ensure a stable life.

Representing the people:- Very supportive and looking forward to implementing the project- It is recommended that some households in the area affected by

the hamlet 13b in the lake tail area and near the dam will be supported if taking land for project or relocation (if necessary)

10 Van Dien (Thanh Thuy reservoir)Chairman of the commune (Nguyen Hong Hai)- The lake has been built for a long time, now there is a

phenomenon of sewage leakage, a desire to have a project to ensure safety

- Ho has a shortage of water in the dry season, only 6/12 months of water should be upgraded to store water

Consultants and investors receive local opinions.


No. Local authorities and people’s opinions Feedback - Ho serves 2 communes, so it is important for local people to do

agricultural productionLand officials- Currently, a road has been managed by the local people, who

have paid money to do the project, and the project continues to follow that section

- Proposing support for road management- There is 01 fish farmer but spontaneous and local will require

relocation to serve the project- No compensation, land acquisitionRepresentatives of the people: Supporting the project, especially farmers working in the lower part of the dam, ensuring safety.

11 Nam Thanh Commune (Rao Bang)Chairman of the commune (Bui Thanh Hai)- Ho built From 1967, after many years of use, he was degraded- Local people find it difficult to buy rain when passing over, they

have to travel far away, especially students- Wishing to have a project, there is a bridge overflow to have way

for people to go.Representatives of departments and unions- Local support, create conditions on construction sites,

conditions ...- Looking forward to the way of wide management, convenient

transportation for people.- Repairing some degraded items, the locality has no funds to

repair and upgrade- No impact on land acquisition if implementing the project's

contents.Representative of neighbors 4b, 7a:- There are projects that people travel much more convenient than

those who go to school and go to the health station, to the commune. In the rainy season, it is separated from the central area, making travel difficult and dangerous.

- Project support, ground clearance support (if any)- Looking forward to soon deploying to benefit people

12 Ky Tan (3/9 và 271)Chairman of the commune:- The commune always supports the project, hoping that the

project will be implemented soon.- The commune will create conditions for finding dump sites.- Suggest Project Owner and contractors to implement

environmental protection measuresRepresentatives of departments and unions:- Local support, create conditions on construction sites,

conditions ...- Looking forward to the way of wide management, convenient

transportation for people.- Repairing some degraded items, the locality has no funds to

repair and upgrade.- Looking forward to the project owner and contractors to create

conditions for local people to participate in the project. Especially the working class in the locality is still very much.

Representatives of households:- People in the subproject area are looking forward to the

subproject

The project owner receives comments from people as well as officials of the CPC. Collaborate with CPC to minimize environmental and social impacts.


No. Local authorities and people’s opinions Feedback - Subproject favor, ground clearance support (if any)- Looking forward to soon deploying to benefit people

8.1.3. Feedback and commitment of the project owner

- The Project owner receives comments and timely adjust in the document editing and well implements measures to minimize negative impacts caused by subproject activities.

- The increase of capacity of the reservoirs is not included in the objective of the project

- The project owner is responsible for damage to HHs and infrastructure of locality and environmental pollution in compliance with regulations and policies of the World Bank and Viet Nam.

- The project owner is responsible for regularly contacting with local authorities, preparing safety, health and worker management plan. And the Investor is responsible for traffic condition in the region.

- The project owner has committed to cooperate with the People's Committee of the communes to conduct diversion of water source for the households during the construction period. They Investor is also responsible for compensation for the entire area which is not irrigated during the construction process.

- The project owner considers options for transport routes to avoid impacts on the people living in the project area.

- The project owner coordinates with the People's Committee to arrange sites for gathering materials and dumping site and transport construction materials in suitable manner.

- Require the contractor to restore the site for people after construction

8.2. Information Disclosure

508. In compliance with OP 4.01 and the World Bank policy on access to information and the current regulations of the Government of Vietnam, the subproject information including objectives, description and potential impacts was disclosed to the public during subproject preparation. The draft of ESIA was sent to locally-affected people and local NGOs and authorities for study before pubic consultation meetings. The final ESIA in Vietnamse shall be disclosed on the project’s website and subproject sites accessible to locally-affected people and local NGOs such as DPC (district people’s committees), CPC (communal people’s committees), and community house, head offices of PPMU and CPMU and on the websites of Nghe An PPC. The English version of ESIA is also disclosed on the external website of the WB prior to appraisal of the subproject.


CONCLUSIONS AND RECOMMENDATIONS

Conclusion

- The subproject is classified as Category B and is not located within or adjacent to any environmentally sensitive areas and does not fall into the exclusion list;

- The report has identified and adequately assessed the potential negative impacts in all three phases of preparation, construction and operation. Simultaneously, mitigation measures, in consultation with authorities and affected people, including vulnerable persons, have been identified;

- When being implemented, the subproject of dam rehabilitation and safety improvement, WB8 in Nghe An province may cause negative impacts during the construction phase. However, because the scale of the construction items is not large and the impacts occur in a short time and the scope is limited in small areas, feasible and suitable mitigation measures have been proposed proportionate to natural conditions, social and economic conditions, management and construction conditions of the subproject.

- The social and environmental management plan is established to manage the negative impacts which helps subproject manager and local authority frequently updated on the process of implementing work items of the subproject. The monitoring system prepared and approved by WB will be applied for the implementation of the subproject. The construction supervision consultant frequently supervises and prepares monthly report to submit to the PPMU. This report is independent from the environmental compliance report of the contractor. PPMU will prepare biannual monitoring report based on the reports prepared by CSC and contractor to submit to CPMU.

Recommendations

- Based on the conclusions of environmental and social impact assessment, it is recommended that:

o The mitigation measures mentioned in the Environmental and Social Management Plan shall be established as an integral part of the bidding documents. The contractor will do breakdown of the workload and estimate the total cost for the implementation of the mitigation measures. The cost is considered as implementation cost of environmental safeguard policy and will be paid when the mitigation measures are considered performed effectively by the contractor.

o PPMU recommended the competent authority and the World Bank to review the ESIA report of the Nghe An WB8 sub-project as the basis for implementing the next steps and to ensure the implementation progress of the sub-project.


REFERENCES

1. Report on the status of urban wastewater - MT Hanoi University of Technology, 2006;

2. Reports summarizing socio-economic situation, national defense, security, women's and ethnic minority reports of the subproject communes;

3. Air environment, Pham Ngoc Dang, scientific and technical publisher, 1997;

4. Social and Safety Management Framework DRSIP 2015;

5. Feasibility Study Report (FS); September 2018

6. Report of resettlement action plan, social impact assessment report; March 2019

7. Report on the socio-economic situation of 12 communes in 2017;

8. Report on the socio-economic situation in 2017 of Nghe An province;

9. Google Earth image source

10. Statistical Yearbook of Nghe An Province, 2017;

11. Report of Environmental Status in Nghe An Province, period 2011-2015;

12. Types of maps:

- Map of the project area

- Map of the current status and land use planning of the project area.

13. Planning on exploitation of ordinary materials minerals (leveling land) for projects in Nghe An province, 2017.

14. Website of Nghe An Department of Natural Resources and Environment:

http://www.nghean.vn:10040/wps/portal/sotnmt/!ut/p/c4/04_SB8K8xLLM9MSSzPy8xBz9CP0os3j3ED8XX8tgYxNzz1BzA0ezoGBDyyAjszAXE_2CbEdFAJoyVHo!/?WCM_GLOBAL_CONTEXT=/wps/wcm/connect/so+tnmt/stnmt/gtc

15. FS report; SA, RAP of the subproject.

16. Nguyen Van Nhung (editor), 1997: Map of potential soil erosion in Vietnam (the ratio is 1: 1,000,000). Scientific reports. Institute of Geography, National Center for Science and Technology, Hanoi.

17. Assessment of Sources of Air, Water, Land Pollution, Who, Geneva, 1993. (The basis of the rapid assessment method, based on the nature of the material, technology, rules of natural processes and experience to determine pollutant discharge load).





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