emergency action plan for votehole dam - karwaterresources.kar.nic.in/eap report-votehole.pdfgorur,...

Project ID Code KA06HH00154 Page A-2

Emergency Action Plan for

Votehole Dam KA06HH0154

Water Resources Department

State of Karnataka.

Emergency Action Plan For Votehole Dam May-2019


Emergency Action Plan

VOTEHOLE Dam

[KA06HH0154]

Prepared for

Karnataka Water Resource Department

(CAUVERY NEERAVARI NIGAM LIMITED)

Prepared by

Chief Engineer,

Hemavathy Project Zone,

Gorur.

06/05/2019



Votehole Dam

Project ID Code KA06HH0154

Emergency Action Plan for Votehole Dam is publishing For the First Time during April-2018

Disclaimer

Every effort has been taken to estimate the severity of flooding and inundation areas likely to be af-

fected by Votehole dam in an emergency condition. These estimates are based on available primary

and secondary data. Every effort has been made to foresee varied emergency possibilities and develop

appropriate notification procedures for timely rescue and relief operations.However, implementation

of the Emergency Action Plan (EAP) involves many agencies, who are required to work in a coordi-

nated manner to reduce the consequences of the emergency triggered by the dam site condition. Effec-

tiveness of the rescue and relief operations depend on many factors including the adequacy and accu-

racy of the estimation of the severity of flooding, coordinated efforts of all the agencies involved in

rescue and relief efforts and availability of facilities like power, telephones, road communications, etc.

EAP Developer may therefore, not be held responsible for the efficacy of the EAP.

For any information, please contact:

C.Manjappa

Chief Engineer,

Hemavathy Project Zone,

Gorur, Karnataka

Mobile Number: 9448088467

Office Number:08172-225437




Votehole Dam

Karnataka Water Resource Department (CAUVERY NEERAVARI NIGAM LIMITED)

Contents

Notification Flowchart (Watch Condition) .............................................................................................. [A5]

Notification Flowchart (Failure Condition) ............................................................................................. [A6]

EAP Distribution List .............................................................................................................................. [A7]

Log Sheet of Changes .............................................................................................................................. [A9]

Approval and Implementation ............................................................................................................... [A10]

Emergency Action Plan…………………………………………………………………… [A 11 To A12]

1. Purpose

2. Dam Description

2.1. General

2.2. Reservoir Operations

3. Responsibilities…………………………………………………………….... [A 12 To A14]

3.1. Dam Owner’s Responsibilities

3.2. Responsibilities for Notification

3.3. Emergency Operations Center

3.4. Responsibilities for Evacuation

3.5. Responsibilities for Duration, Security, Termination, and Follow-up

3.6. Communications

4. Emergency Detection, Evaluation, and Classification ………………………….. [A14 to A19]

4.1. Emergency Detection]

4.2. Emergency Evaluation and Classification

4.3. Previously Known Problems

5. Preparedness ……………………………………………………………………. .. [ A20]

6. Supplies and Resources…………………………………………………………... [A20 to 21]

6.1. Contracts

6.2. Equipment and Supplies

6.3. Reports

7. Inundation Area……………………………………………………………………….... [A22]

7.1. Local Evacuation Plan]

8. Implementation…………………………………………………………………..[A22]

8.1. Development

8.2. Updating

8.3. Testing

8.4. Training]

Tab 1 – Vicinity Map ........................................................................................................................... [A24]

Tab 2 – Inundation Map ...................................................................................................................... [A25]

Tab 3 – Dam Description ..................................................................................................................... [A58]

Tab 4 – Sample Public Announcements ............................................................................................. [A60]

Tab 5 – Evidence of Distress ............................................................................................................... [A61]

Tab 6 – Supplies and Resources .......................................................................................................... [B 1]

Tab 7 – Annual EAP Evaluation Checklist ........................................................................................ [B 3]

Tab 8 – Plan Review and Update ......................................................................................................... [B 4]

Tab 9 – Training Record ....................................................................................................................... [B5]



VOTEHOLE DAM –WATCH CONDITION NOTIFICATION FLOW CHART

Chief Engineer Hemavathy project Zone Office

Cauvery Neeravari Nigam Limited

Name: Manjappa.C

Title: Chief Engineer Incharge


Name: N.C Prasad

Title: Deputy Chief Engineer

Mobile Number9449993254

Office Number: 08172-225437

Email: [email protected]

Superintending Engineer

Hemavathy project Circle

Office


NameC.Manjappa

Title: Superintending Engineer



Email: secnnlhpc-

[email protected]

Name C.S Vishwanath

Title: Technical Assistant to S.E.

Mobile Number:9448731989

Office Number:08172-225298 Email: [email protected]

Office of the Dam

Executive Engineer

Hemavathy Dam Division Office Gorur


Name: Gangadhar.

Title: Executive Engineer incharge



Name: Puttaswamy

Title: Assistant Engineer (PA to EE)




AvailableResources

Heavy Equipment Service

Name:Manjunatha earth

movers

Mobile Number:

9844120205

Name :- Best earth movers

Mob;_ 09845924691

sakleshpur

Sand and Gravel Supply

Name: Senior Geologist office,

K.R puram, Hassan.


Ready Mix Concrete Supply

Name:S.L.V Ready Mix Concrete

Mobile Number:8747844121.

Name :- Shivashanker

Mobile :-9448471189,09900717383

State Dam safety Office

(SDSO)

Name: Chikkarayappa

Title: Director



Site Office of DamOwner/Operator

Owner/Operator: Karnataka

Water Resources Department

Name: G. Hanumanthaiah

Title: Assistant Executive Engineer



email: [email protected]

Name: Sandeep K

Title: Assistant Engineer



email:[email protected]

1

3

2

Order of notification 1

Design Wing, Mysore

Name: shankaregowda

Office ;-08212477719, Mob :- 9632393263


Office Number: [email protected]

Email:

mailto:[email protected]



VOTEHOLE DAM –FAILURE CONDITION NOTIFICATIONFLOW CHART

Site Office of Dam Owner/ Operator

Owner/ Operator: Karnataka, WRD

Name: G. Hanumanthaiah Title: Assistant Executive Engineer

Mobile Number: 9964118054, Office Number:08170-218123

email: [email protected]

Name: Sandeep K Title: Assistant Engineer Mobile Number: 9844243475

Office Number:08170-218123, email:[email protected]

Central Water Commission

Name: N K mathur

Title: Chief Engineer(CDSO)



[email protected]

Name: Pramod Narayan

Title: Director DRIP,CWC



[email protected]

Office of the District Collector

(Hassan)

Name ;- Shri. Akram Pasha,(IAS)

Title: District Collector

Mob: 948326111

Off No:08172-267345

Fax No: 08172-265418

Mail I.D: [email protected]

Heavy Equipment Service Name:Manjunatha earth mov-

ers



Mob;_ 09845924691

sakleshpur


Name: Senior Geologist of-

fice, K.R puram, Hassan.






Mobile :-9448471189,

National Disaster Management

Authority

Name: Dr. Pradeep Kumar, IAS,

Title: Joint Secretary



Name: A.K.Sanghi,ITS

JS (Mitigation, IT &Comn)




Karnataka state Disaster

Management Authority

Name: Srinivas Reddy

Title: Director

Phone:9742204377

Off No: 080- 67355000

Fax: +918067355198

[email protected] |

[email protected]

AvailableResources

0

Order of notification

1

3 2

Exe Eng. (Dam)

HemavathyDam Division,

Gorur

Name: Gangadhar

Title: Executive Engineer



Email:

[email protected]

Name: Puttaswamy

Title: Assistant Engineer (PA to

EE)




State Dam safetyOffice (SDSO)

Name: Chikkarayappa

Title: Director

office of director KERS K R sagar

mandya dist.



Owners of Downstream

Dam: Hemavathy

Name: Gangadhar, Title: Executive Engineer

Mobile Number: 8618946407,Office Number:08172-

256749 ,Email: [email protected]

Dam :- Yagachi

Name Ramesh, Title : Executive engineer, office of

Yagachi project dision, Halebeedu road , Belur . Ph :

08177-222293, Mob : 9449294590.


Hemavathy project Circle Office


NameC.Manjappa





Name C.S Vishwanath

Title: Technical Assistant to S.E.



Chief Engineer

Hemavathy project Zone Office


NameC.Manjappa Title: Chief Engineer

Mobile Number9448088467 Office Number: 08172-225437


Name: N.C Prasad

Title: Deputy Chief Engineer




Chief Engineer

Water Resource Department Karnataka

Name: Prabhakar Hummigi

Title: Chief Engineer



Fax:080-22872247 ([email protected])


Name: Pradeep mithra manjunath

Title: Project Director SPMU Drip




Managing Director

Cauvery Neeravari Nigam Limited, Bangalore

Name: H.L. Prasanna

Title: Managing Director

Mob No: 9483510818

Off No:080-22352997,

Fax:080-22352998

Mail I.D: [email protected]

Name: SRI. M. BANGARA SWAMY

Title: Technical Director

Mob No:

Off No: 080-22352997

CWC Monitoring(S), Office, Ban-

galore

Contact:

Title: Monitoring (S), CWC, JALA-

SOUDHA

Office No: 080-23376030

Email: Rajan_nair [email protected]

1

Police Control Room,

Hassan :100, 08172-

268000.

Fire Station, Hassan:

101, 268608.

Ambulance, Hassan:

102.

Government Hospi-

tal, Hassan: 08172-

268414.

Radio Station

(Prashar Bharathi)

Hassan: 08172-

246318.

TV, Five star

channel: 08172-

267333.






http://waterresources.kar.nic.in/orgstru.htm



VOTEHOLE DAM


EAP Distribution List

A copy of the EAP has been provided to the following people:

Authority Name, Title, Phone Address

State Dam Safety Organization +

Dam Owner

Prabhakar Hummigi

Chief Engineer Mobile Number: 9448290891

080-22871174

Office of Water Resource

Development Organization, Anand

Rao Circle, Bengaluru.

Dam Owner H.L Prasanna

Managing Director

080-22352997, 9483510818

Office of Cauvery Neeravari Ni-

gam Limited,Anandaraocircle,

Bengaluru.

Dam Owner C,Manjappa

Chief Engineer

08172-225437,

Mob- 9448088467

Office of Hemavathy Project Zone,

Gorur.

Dam Owner C,Manjappa

Superintending Engineer 9448088467

08172-225298


Office of Hemavathy Project Cir-

cle, Gorur.

Dam Operator Gangadhar

Executive Engineer

8618946407

08172-256749

O/O Executive Engineer

Hemavathy dam division, Gorur.

State Public Works Department R Shrinivas

Chief Engineer (South)

Phone No:9483008987

Office No:

080-22212830/2274301

Chief Engineer, Communication &

Buildings(South), K.R. Circle

Bangalore560001.

Hassan District Disaster Manage-

ment Authority

Not Available

District Public Works Department

Hassan District

T.N Chandrashekaraiah


Phone

08172-268437

Superintending Engineer, PWD

Hassan circle, Hassan

Office of District Collector Hassan Shri. Akram Pasha (IAS)

District Collector

9483262111

08172-265028

Office of district collector,

Hassan, Karnataka

Office of District Collector

Chikkamagalore

Name: Sri Rangayya KAS

Title: District Collector

Mob: 9449030402

Off No:08262-230401

Office of district collector,

Chikkamaglore, Karnataka

Downstream Owner

Dam: Hemavathy

Name: Gangadhar, Title: Execu-

tive Engineer

Dam :- Yagachi

Name Ramesh, Title : Executive

engineer,.

Mobile Number: 8618946407,Office

Number:08172-256749 ,Email: Ex-

[email protected]

office of Yagachi project dision, Hale-

beedu road , Belur . Ph : 08177-

222293, Mob : 9449294590





Karnataka state Disaster

Management Authority

Name:

Title: Director

Off No: 080- 67355000

Director, Karnataka State Natural

Disaster Monitoring Centre,

KSNDMC Campus, Major

Sandeep Unnikrishnan Road,Near

Attur Layout, Yelahanka Banga-

lore - 560 064, Karnataka, INDIA,

National Disaster Management Au-

thority

Name: A K Sanghi


Mitigation,IT and comn



[email protected]

NDMA Bhavan,

A-1,Safdarjung Enclave

New Delhi-110029

Central Dam Safety Organization

L A V Nathan

Chief Engineer CDSO

Phone:9717377808

Room No 313 S, Sewa Bhava R K

puram, New Delhi

Delhi 110066

Ministry of Road Transport De-

partment, Karnataka

Public Relations Officer,

Phone: 080-22210994

E-mail: proctr-trans- [email protected]

Phone: 9449863459

Office of the Commissioner for

Transport, 1st Floor, ‘A’ Block,

TTMC Building,

Shantinagar, Bengaluru - 560027

Superintendent of Police,

Hassan

Name: Prakash gowda, IPS.

Titile: Superintendent of Police


Rangoli Halla, Hassan, Karnataka

573201

CWC Official (DRIP) Name:Pramod Narayan

Title : Director


Phone: 9958975921

Email:[email protected]

Name: Mayank Singh Chetan

Title : Deputy Director


Phone: 9953884319

Email:[email protected]

Central Water Commission, R.K.

Puram, New Delhi.

AvailableResources

Heavy Equipment Service Name:Manjunatha earth movers



Mob;_ 09845924691

sakleshpur


Name: Senior Geologist office,

K.R puram, Hassan.






Mobile :-9448471189,

Votehole Dam


mailto:%20proctr-trans-%[email protected]






Log Sheet of Changes

The following changes have been made to the EAP and revisions have been provided to the people

shown on the EAP Distribution List.

Date Change Made Signature



Votehole Dam

Project ID Code [KA06HH0154]

Approval and Implementation

This Emergency Action Plan is hereby approved. This plan is effective immediately and supersedes

all previous editions.

_________

[Signature]

C.Manjappa, Chief Engineer, Hemavathy Project Zone, Gorur.

I have received a copy of this Emergency Action Plan and concur with the notification procedures.

Gangadhar.

Executive Engineer

G. Hanumanthaiah

Asistant Executive Engineer

Sandeep K

Asst Engineer

Date:




Votehole Dam


1. Purpose

The purpose of this Emergency Action Plan (EAP) is to identify emergency situations that could

threaten Votehole Dam and to plan for an expedited, effective response to prevent failure of the dam

and warn downstream residents of impending danger. This plan defines the notification procedures to

be followed in the event of a potentially hazardous situation. The procedures are intended to protect

lives and prevent property damage from an excessive release of water from the dam spillways or an

uncontrolled outflow of water from the breached portion of dam.

2. Dam Description

2.1. General

Votehole Dam and Reservoir are owned and operated by Cauvery Neeravari Nigam Limited It is lo-

cated on Votehole River which is a tributary of Yagachi River which flows in Cauvery basin in Has-

sanDistrictof Karnataka. The dam was completed in 1985. The reservoir was constructed to serve as

Irrigation project

A vicinity map showing the location of the dam is presented in Tab 1. Inundation mapsshowing the

areas subject to flooding as a result of a dam failure are provided in Tab 2. The inundation area is de-

scribed in further detail in the Inundation Area section of the report. Lastly,a description of the dam,

its spillways, and other features are outlined in the Dam Descriptionin Tab 3.

2.2. Reservoir Operations

Reservoir Features

FRL = 966.05mtr

MWL = 966.05mtr (3169.61 ft)

Road Level = 968.48mtr (3177.58 ft)

Revised Flood Peak = 1606 Cumecs

Sill Level of the Crest gate = 961.476 (3154.60 ft)

The spillway provided with 3 Nos. of crest gates of size 30 ft x 15 ft (Radial lift) to discharge a flood

of 577.346 cumecs (20380 cusecs) having 3 Nos. of Radial lift gates.

As per the CWC guidelines SPF has been worked out and it is approved for 1606 cumecs vide letter

no 1630 dated 19-08-2015 Hence, the spillway adequacy to be assessed with SPF which will be more

than 2.50 maximum observed flood. Hence Additional spillway is required.

RESERVOIR OPERATION DURING FLOODS

The maximum storage capacity of reser voir is 1.51 TMC. It is proposed to have 1.36 tmc storage

capacity as flood absorption below FRL during active monsoon so as to have safe and effective reser-

voirs operation schedule. The gross storage capacity and reservoir level with 1.36 tmc flood absorp-

tion capacity below FRL are as below.

R.L. Capacity in Mcft.

FRL 966.05 mtr (3169.61 ft) 1510 1510 Mcft

RL 965.44 mtr (3167.61 ft) 1363



The rainfall in the catchment area generally starts from 1st week of June and it is very active generally

during July, August and September months. If the flood absorption capacity of 1.36 TMC is main-

tained, the reservoir level has to be kept at 965.44 i.e., 0.60mtrt below FRL. It is better to start the res-

ervoir operation schedule duly predicting the inflow in the reservoir based on gauged discharge at

Balehonnur and also from the daily rainfall records of upstream rain gauge station in the catchment

from 1st week of June itself. However, the reservoir level of RL 965.44 mtr with cushion of 0.60mtr

should maintained till the end of August by suitably matching the inflow and outflow discharges.

During the month of September depending up on the inflow pattern, the reservoir water level may be

raised to safer level (i.e., 0.30 mtr below the FRL). From October and onwards the reservoir water

level may be brought to the FRL level depending up on the inflow pattern and forecast of floods/

monsoon.

If any flash floods or cyclonic floods are expected during October / November, careful prediction

of inflows from the upper gauge stations and from weather forecast should be done and the reservoirs

operation in advance to keep cushion for the inflow has to be carefully done.

Advance warning with quantity of water to be released in the river should be intimated to the

concern deputy commissioners of Hassan/ Superintendent of Police of Hassan, / Tahasildar alur and

Hassan , Chief Engineer, Hemavathy Zone Gorur, Superintending Engineer, Hemavathy Project Cir-

cle Gorur, Executive Engineer Hemavathy Dam Division, Gorur and concerned Tahsildar through

wireless. A wide publicity through radio, T.V., and daily Newspaper to this effect must be issued.

3. Responsibilities

3.1. Dam Owner’s Responsibilities

The dam owner, Cauvery Neeravari Nigam Limited is responsible for all dam operation and mainte-

nance. The EAP will not designate a specific person for a specific responsibility but instead will des-

ignate the person’s duties or job description.

A) Assistant Executive Engineer responsibilities

1. Responsible for conducting routine dam maintenance, such as annual weed control, con-

ducting dam integrity inspections, and notifying Executive Engineer, Hemavathy Dam

Division, CNNL, Gorur for any potential emergency situations.

2. Responsible for contacting emergency personnel if a dam failure be imminent.

3. Responsible for collecting weather forecasts and the inflow forecasts and altering of any

potential emergency situation.

B) Emergency Planning Manager Responsibilities

1. Implimentation of EAP

2. To conduct routine inspection.

3. To classify the events into the emergency alerts.

4. To ensure effective transmission of hydro meteorological and out flow data.

5. To ensure that the current approved version of EAP is functional and available to all

stakeholders.

6. Responsible for the Operation and Maintenance of the Dam.

7. Observing the dam during extreme flooding events, during holidays, on weekends, and

during normal conditions.

8. Responsible for implementing each of the required phases of the EAP.

9. In charge of Emergency response.

10. Communication and coordination channels.

11. Location of the incident command center or emergency operating center.



C) Superintending engineerResponsibilities

Responsible for updating the EAP. An annual EAP review will be conducted to ensure

that contact names and numbers are current on the Notification Flowcharts.

D) Chief EngineerResponsibilities

Directing specific, incident appropriate actions during an emergency, such as opening or clos-

ing water outlets and remedial construction activities such as earth moving, etc. Specific sce-

narios are not listed in this EAP.

3.2. Responsibilities for Notification

The Emergency Planning Manager is responsible for inspecting the dam in a potential emergency

such as the potential threat of high waters or a tropical cyclone. The Emergency Planning Manager

will contact the Hassancity District Police or District Collector.

If warranted, the Emergency Planning Manager will notify the District collector. The Hassan city Dis-

trict Police will notify downstream residents. The Hassan city District Collector is communications

with the disaster management authorities.

3.3. Emergency Operations Center

In the event of a failure condition, the Emergency Planning Manager will activate the Emergency

Operations Center to serve as the main distribution center for warning and evacuation activities. The

Emergency Operations Center will be established at the Office of Assistant Executive Engineer No-

02 Votehole project sub division, Alur . The Emergency Planning Manager will be responsible for

initiating actions from this location.

3.4. Responsibilities for Evacuation

The Hassan city District Police, district collector, Chief engineer, Superintending engineer, executive

engineer and all department responsibilities;

1.warn the public under emergency condition at the dam.

2. Assist the disaster management authorities during the evacuation operasions.

3. Install barrigades in all effeced bridges. etc

3.5. Responsibilities for Duration, Security, Termination, and Follow-up

The Executive Engineer is responsible for monitoring of emergency situations at the dam and keeping

authorities informed, based on the Notification Flowcharts.

The Executive Engineer and the Hassan city District Collector are responsible for declaring that an

emergency at the dam is terminated. Applicable authorities will be notified based on the Notification

Flowcharts.

The Chief Engineer will ensure that a follow-up evaluation is completed by all participants after the

emergency. The results of the evaluation should be documented in a written report and filed with the

EAP.

3.6. Communications

Local officials and downstream residents will be notified by landline telephone, if available;otherwise

via cell phones or emergency personnel (in person or using their radios). The various networks for

emergency use include the networks of the following:

• The Hassan city District Police

• The Karnataka State Disaster Management Authority

• The Karnataka Ministry of Road Transport and Highways



Sample public announcements appear in Tab 4. Verification or authentication of the situation can be

made by contacting the Emergency Planning Manager officials. Television, Radio and bulk SMS fa-

cilities of the local Mobile Network Operators can be used as much as possible to notify area residents

of the possible dangers. Public announcements are to be issued by the concerned Cauvery Neeravari

Nigam limited officers.

4. Emergency Detection, Evaluation, and Classification

4.1. Emergency Detection

A. Situations

Many dam conditions can lead to emergency situations, not all of which will necessitate the im-

plementation of the EAP. However, if any of them occur, the appropriate actions must be taken.

• Severe Storms/Inclement Weather: Although generally not in themselves a threat to the

dam, severe storms and other inclement weather conditions can contribute to an existing

problem and hinder any remediation efforts. Severe storms also cause the uncontrolled

release of floodwater and increase flow in already rain-swollen areas.

• Tropical cyclones: Tropical cyclones do occur in the area, with the potential for structur-

al damage to the dam, possibly resulting in its failure. If a tropical cyclone has struck in

the area, an inspection of the dam for any signs of damage will be appropriate.

• Earthquakes: Votehole Dam is located in the seismic zoneII.An earthquake is a possibil-

ity, and appropriate post-earthquake inspections should be performed.

• Sabotage: A threat to damage the dam has been made. Appropriate actions must be taken

to protect the dam.

B. Signs of Failure

The Emergency Planning Manageris responsible for conducting routine inspections and identify-

ing conditions that could indicate the onset of problems leading to a dam failure. The early iden-

tification of potentially dangerous conditions can allow time for the implementation of EAPs. It

is important to understand how distress can develop into failure. With appropriate action, distress

need not lead to a catastrophic failure of the dam. The following sections describe some of the

different types of failure which could lead to a dam failure.

• Seepage Failure: Although all earthen embankments allow some minor seepage through

the dam or the foundation, excessive, uncontrolled seepage can result in piping (the

movement of embankment material in the seepage flow) and lead to failure. Piping can

occur for years at a slow rate. If the piping has progressed to a dangerous level, it will be

evident by increased flow or the discharge of muddy water (or both). At that stage, im-

mediate action to stop the piping is needed. Fully developed piping is difficult to control

and is very likely to result in failure. A whirlpool in the reservoir is a sign of uncontrol-

lable piping and necessitates immediate emergency action.

• Embankment or Foundation Sliding: Sliding is usually first apparent when cracks or

bulges in the embankment appear. Slides with progressive movement can cause failure

of the embankment.

• Structural Failure:The structural failure or collapse of any non-overflow portion of the

dam, spillway or spillway gates could result in loss of the reservoir. A structural failure

of a portion of the spillway could cause piping and possibly embankment failure.



• Overtopping Failure: Overtopping of the embankment results in erosion of the dam crest.

Once erosion begins, it is very difficult to stop.

4.2. Emergency Evaluation and Classification

This section lists the conditions and actions which may be used to classify the level of emergency re-

sponse, as a guide for the Emergency Planning Manager. Specific dam observations and correspond-

ing emergency classification levels can be found in the Evidence of Distress table in Tab 5.

Internal Alert ConditionBLUE –A “watch” condition. A problem has been detected at the dam that

requires constant monitoring. At this time, the distress condition is manageable by dam personnel.

The Emergency Planning Managerwill be responsible for monitoring and repair as soon as possible

and implementing the appropriate Notification Flowchart. The following is a list of conditions that-

would initiate this condition:

• Cloudy or dirty seepage or seepage with an increase in flow, boils, piping, or bogs

• Seepage around conduits

• Large sinkholes with corresponding seepage anywhere on the embankment or downstream

from the toe

• Any slide that degrades the crest of the embankment or that is progressively increasing in size

• Cracking or movement of any concrete structure

• An increase in the reservoir level leading to engagement of the emergency spillway

• Exceptionally heavy rainfall in the catchment of the dam reservoir

External Alert ConditionORANGE– This is indicative of adam condition that is progressively get-

ting worse; and there is a high probability of dam failure. Although there is no immediate danger, the

dam could fail if conditions continue to deteriorate.The Emergency Planning Manager will be re-

sponsible for initiating immediate repairs, including lowering the reservoir if appropriate and imple-

menting the appropriate Notification Flowchart. The following is a list of conditions thatwould initiate

this condition:

• Large boils, increasing in size and flow rate, especially if there is flowing muddy water

• Significantly increasing seepage, especially flowing muddy water

• Slides involving a large mass of material that impairs the crest of the dam and is continuing to

move

• Sinkholes with seepage flowing muddy water

• Large cracks, movement or failure of a portion of any major concrete structure that forms an

integral part of the dam

• An increase in the reservoir level to near the top of the dam

• Overtopping of a dam that is not designed for overtopping

• Near to ‘Design Flood’ inflow forecast

External Alert Conditions RED – These are “failure” conditions. Either the dam is in immediate

danger of failing or has already failed. No time remains to implement measures to prevent failure.

Evacuate immediately. Evacuation efforts will continue until the situation is stabilized.The Emergen-

cy Planning Manager is responsible for implementing the appropriate Notification Flowchart. The

following is a list of conditions that would initiate “imminent dam failure” or “dam failure” condi-

tions:

• Rapidly increasing boils or the presence of new, significantly flowing boils, particularly mud-

dy ones near previously identified ones



• Rapidly increasing seepage, especially flowing muddy water

• Slides involving a large mass of material or which have degraded the crest of the embankment

to a level that approaches the water surface level, or if significant seepage is observed through

the slide area

• Settlement that is predicted to degrade to the reservoir level

• Cracks that extend to the reservoir level

• Significant movement or failure of any structure that forms an integral part

of the dam

• Overtopping of an earthen dam

• Uncontrollable release of the reservoir

4.3. Previously Known Problems

As Per the DSRP inspection Report 2014

Sl

No Recommendations. Complience

1

Assess standard project flood (SPF) and

verify the adequacy of the spillway capac-

ity and the existing free board for the dam

based on “ Saville”s method and if it does

not meet the requirement, proposals for

providing auxillary spillway of required

capacity in the saddle existing on the left

flank may be considered and adopted.

The revised peak value of the estimated

SPF considering two alternative critical

sequences works out to 1604 & 1606 cu-

mecs level pool routing of votehole reser-

voir is carried out to examine the adequacy

of the free board considering the two dist

inflow hydrographs the maximum water

level attained in the reservoir during pas-

sage of flood peak value of 1606 cumecs in

a 967.837mt which is 1.787 mt as above

FRL of 966.05mt with a peak discharge

the additional spillway is require in the re-

gard action well be taken.

2

Hydrographic surveys (IBS) of the reser-

voir need to be carried out periodically for

determination of extent of reservoir sedi-

mentation in dead and live storage por-

tions. Based on the survey in 2010-11, the

assessed extent of loss of storage and con-

sequent possible reduction in the annual

benefits point to the need to formulate

schemes for minimization of rate of sedi-

mentation such as adoption of watershed

management techniques like contour

bunding, provision of gully traps anti soil

erosion measures, etc.

Hydrographic surveys have been carried

out during January 2011 by KERS authori-

ties. It is observed that 15.57% of Gross

storage capacity amounting to 0.235 TMC

out of 1.51 TMC has been reduced due to

sedimentation.



3

The reservoir operation schedules should

be developed for the procedure outlined in

IS 7323-1994 or its latest version. The

reservoir should be operated as per opera-

tion schedule so drawn upto to route the

SPF safely without risk of overtopping of

dam.

The same will be done as per SPF value

arrived and flood routing study report is

prepared by director KERS, K.R sagara.

4

Department should also prepare an Emer-

gency Action plan including suitable

communication system of flood forewarn-

ing to the habitants living downstream of

the dam within the zone prohibited for

dwelling. For this purpose Department

should prepare necessary inundation map

of the downstream valley showing flood

contours of different intensities dully de-

marcating “Prohibited Zone”, :Restricted

Zone” and “Caution Zone” to avert possi-

ble hazards to life and property during

release of floods over the spillway.

The inundation map and flood routing is

prepaid by CWC & KERS, The preparation

of EAP is done with co-operation of SPMU

DRIP.

5

Leakage is observed near downstream toe

of the dam at the lateral side of the left

side training wall of the draft channel.

The project Engineers stated that a pipe is

running at the foundation level of the dam

and the leakage observed may be from the

joints of the pipe. This needs to be con-

firmed by excavating upto the pipe level

and plugging leakages.

The work taken up as per direction of

CWC. Due to technical reason not able to

arrest leakage.

6

Seepage from the internal drainage ar-

rangement is not properly entering the toe

drain chamber leading to the mother val-

ley. The toe drain may be properly

cleaned and re-laid for proper disposal of

seepage water.

The work taken up in DRIP-II, proposal

submitted.

7

Provide drainage for the roadway by

providing cross slope of the road surface

towards t he downstream and a longitudi-

nal drain running along the downstream

edge of the roadway to collect the water

falling on the road and diverting the flows

along paved chutes provided at about 40

to 50 m intervals as laid down in the rele-

vant IS.

Work is completed in DRIP work.

8 Collector drains should be provided to

collect water from the chute drains and

The work will be taken up in DRIP-II, pro-

posal submitted.



the water falling on the downstream slope

of the dam and the same may be drained

into the left bank canal.

9

The leakage from the supply pipe needs to

be tackled urgently. For this it is suggest-

ed to sink a well of diameter 1.20 to 1.50

m with prefabricated RCC rings of re-

quired thickness, vertically above the pipe

outlet in the non-overflow dam till it ex-

poses the pipe. While sinking the well, the

underground water should be pumped

continuously by employing a pump of re-

quired size till the water table is lowered

to pipe invert level. After exposing the

pipe, all visible leakage spots should be

sealed off to prevent further leakage to

develop. Thereafter few grout holes

should be drilled into the masonry at

about 0.50 m to 0.60 m along the periph-

eral length of the pipe and grouted with

Bentonite slurry under pressure to seal off

the leakage paths along the pipe inside. A

pump chamber of about 4.00m height

above pipe invert using the well already

sunk may be created which could be

about 1.00 m below ground to facilitate

pumping in future if leakage persists and

thereby rendering the subsoil free from

submergence at all times.

As per DSRP suggestion with 2.40m dia

RCC rings sink the well up to 10 depth fur-

ther it is not able to sink the work because

of the area is fully refilled with hard rock

boulders for back fill of stilling basin re-

taining wall, these H,R borlder are at edges

of the rings it is very difficult to brake the

boulders is watering of shiphy condition

and the leakage water comes out at differ-

ent places as different depth and also out

side of the rings also hence the well sinking

work was stopped.

10

The condition of the stilling basin and its

appurtenant works should be verified un-

der dry conditions by bailing out standing

water and erosion damages if any, should

be repaired for smooth functioning.

The estimate sanctioned and entrust-

ed on tender basis for Rs. 3.00 lakhs. But

contractor not executed the work due to

standing water is the stilling basin, Now

provision is made under DRIP-II for

stilling basing repair and constructing river

training work.

11

Quality of the reservoir water should be

chemically analyzed to assess the quantity

of lime leached out from the cement used

during construction to assess whether the

extent of lime leaching is within the per-

missible limits or not. For this purpose

samples of both seepage water and reser-

voir water should be collected simultane-

ously and their chemical analysis carried

out periodically under different reservoir

levels and data maintained in the suggest-

ed format.

Action will be taken accordingly in

consultancy with KERS, K.R Sagara.



12

Maintain the weekly seepage data

by installing suitable measuring devices

in the drainage gallery.

Action will be taken

13

Install an automatic water level re-

corder with the assistance of the quality

control Division for accurate reservoir

levels measurements and maintain the

readings.

This work proposed under DRIP-I,

now the work is completed. Installed auto-

matic water level recorder to the Dam

14

Details of key trench and foundation

treatment provided should be verified and

suitable remedial action if any required

may be taken accordingly.

Action will be initiated in this regard

15

The quality control Division may be

referred to examine the condition of pie-

zometers and their revival. In case they

have become defunct and cannot be re-

vived, action may be taken to install few

“Casagrande / Electrical piezometers in

the deepest portion of both left and right

bank earthen dams for observing devel-

opment of pore pressures and taking nec-

essary action to ensure safety of dam.

Action is taken by Q.C Division,

Gorur in this regard. By the quality control

officers efforts, The Excising, piezometer

are now is working condition, The chief

engineer WRDO and nodal officer for

DRIP was Inspected on 26-06-2016 and

give direction to no necessity of new in-

strumentation, the excisting piezometer are

is good condition.

16

Clear all vegetative growths noticed

in the spillway, non overflow dams and

spillway training wall.

Cleared

17

The standby power should be made

functional to enable periodical operation

of the gates even in the event of power

shutdowns.

Diesel Generator provided

18

Gate operations and maintenance

schedule should be prepared and adopted

for regular maintenance.

Gate operation and maintenance

schedule is prepared and the same adopted

for regular maintenance.

19

The seals provided to the gates

should be replaced wherever they become

worn out so that leakages if any are

stopped.

Provision in made DRIP-II and pro-

posal submitted

20

The gates and hoisting mechanism

should be maintained periodically by

painting, oiling and greasing.

Provision in made DRIP-II and pro-

posal submitted

21

Trash racks should be provided at

the entry of sluice vents to prevent float-

ing objects entering and blocking the

sluice vent.

Provision in made DRIP-I and work

completed.



5. Preparedness

Preparedness actions are to be taken both before and following the development of emergency

conditions and should identify ways of preparing for an emergency, increasing response readiness in a

uniform and coordinated manner, and helping to reduce the effects of a dam failure. The following are

some steps that could prevent or delay failure after an emergency is first discovered.

Surveillance:Emergency Planning Manager will monitor the dam during emergency situations such

as a severe storm event.

Response on forecast of excessive inflow: Emergency Planning Manager will warn the down stream

population and down stream dams, initiate 24 h monitoring etc indicate all the responsible to coordi-

nate and execute such tasks , after release excessive inflow forecast by way of controlled spillway

releases.

Response during weekends and holidays: Emergency Planning Manager and site office engineers

will be available for 24 h at emergency response during weekends and holidays and can be present at

the dam site within short time [15 minutes] of an emergency condition.

Response during periods of darkness and adverse weather: During period of darkness and ad-

verse weater 45 KVA generator is installed in dam site for emergency condition.. Emergency Plan-

ning Manager will be able to access the site during adverse weather conditions by foot or any other

utility vehicle

Access to the site: Alternate access routes should be planned in the event of an emergency at the dam.

Route No.-1. Hassan-Alur to Votehole dam via bikod-belur road, This road is connected to right

embankment side of dam (Alur to dam site – 16 km)

Route No-2.Belur-Bikod to Votehole dam,This road is connected to left embankment side of dam.

(Belur to dam site – 17 km)

Preventive measures can be taken in an emergency to prevent the catastrophic failure of the dam, but

such repairs should be undertaken with extreme caution. The repairs are only temporary, and a per-

manent repair should be designed by an engineer as soon as possible.

The following actions should only be undertaken under the direction of a professional engineer or

contractor. In all cases, the appropriate Notification Flowchart must be implemented and the person-

nel of the SDSO must be notified.

Consider the following preparedness actions if the dam’s integrity is threatened by:

Seepage Failure

• Plug the flow with whatever material is available (hay, bentonite, or plastic) if the entrance

is in the reservoir.

• Lower the water level in the reservoir by using the low flow outlet and pumping if neces-

sary, until the flow decreases to a non-erosive velocity or until it stops. Place an inverted

filter (a protective layer of sand and gravel) on the exit area to hold the material in place.

• Continue operating at a lower level until a repair is made.

Embankment or Foundation Sliding

• Lower the water level in the reservoir byusing the low flow outletand pumping if neces-

sary at a rate and to an elevation considered safe, given the slide condition.

• Stabilize the slide, if on the downstream slope, by weighting the toe area below the slide

with soil, rock, or gravel.

• Continue operating at a lower level until a repair is made.

Structural Failure



• Implement temporary measures to protect the damaged structure, such as placing rock

riprap in the damaged area.

• Lower the water level to a safe elevation through the low flow outlet and by pumping if

necessary.

6.Supplies and Resources

6.1. Contracts

Should Cauvery Neeravari Nigam limited personnel and resources prove to be inadequate during an

emergency, requests will be made for assistance from other local jurisdictions, other agencies, and

industry, as needed. Such assistance may include equipment, supplies, or personnel. All agreements

will be entered into by authorized officials and should be in writing whenever possible. The Executive

Engineer shall have the authority to enter into agreements as deemed necessary to prevent the failure

of the dam.

6.2. Equipment and Supplies

Equipment that is available for use and local contractors that can be contacted to provide equipment

during an emergency event are listed in Tab 6.

6.3. Reports

Technical Data

Pre-monsoon (for the month of may )and post-monsoon( for the month of November) inspections of

the dam will be made to evaluate its structural safety, stability, and operational adequacy by assistant

executive engineer, executive engineer, superintendent engineer, chief engineer. In the event of an

abnormal occurrence, reference to these reports, particularly the photographs, can be beneficial in the

evaluation of a potential problem.

Technical records such as drawings and inspection reports should be stored and carefully maintained

at the Cauvery Neeravari Nigam Limited Site offices. Alternate personnel will be familiar with the

location of the documents in the event of an emergency situation.

Emergency Operations Center Activity Log

Any unusual or emergency condition should be documented, including the following:

• Activation or deactivation of emergency facilities

• Emergency notifications to other local governments and to state and centralgovernment agen-

cies

• Significant changes in the emergency

• Major commitments of resources or requests for additional resources from

external sources

• Telephone calls should be recorded in chronological order

• Issuance of protective action recommendations to the public

• Evacuations

• Casualties

• Termination of the incident

Costs of the Emergency Operations Center

For major emergencies, the emergency operations center will maintain detailed records of costs ex-

pended. These records may be used to recover costs from the responsible party or insurers, or as a ba-



sis for requesting financial assistance for certain allowable response and recovery costs from the state

or central government. Documented costs should include:

• Personnel costs, especially overtime

• Equipment operation

• Equipment leasing and rental

• Contract services to support emergency operations

• Specialized supplies expended in emergency operations

7. Inundation Area

The inundation map illustrates the areas subject to flooding from a failure of the dam and can be

found in Tab 2. The map was prepared using the results of a full breach analysis.

After examining the results of the breach analysis of Votehole Dam, it has been determined that there

were a significant number of structures that could be affected due to a design flood or sunny-day dam

breach. Hassan District, can suffer a significant impact from a breach of the dam, others structure like

bridges, schools, high ways, culverts atc. In addition, water resulting from a breach, and associated

damages, can, under certain circumstances, travel down the Votehole River affecting near by

Districts.

The breach analysis contains profiles of the peak flood levels expected, as well as an estimation of the

time from the beginning of the breach to the peak flood elevations. A comparison of the areas that are

likely to be flooded with the plots showing the times from the start of the breach to the flooding shows

the areas of evacuation and the time constraints involved. Figures in the breach analysis include in-

formation on the estimated impact of flooding on the bridges along the Yagachi River. These struc-

tures may suffer such impacts before the peak elevation of the flood wave.

7.1. Local Evacuation Plan

If imminent failure of the dam with uncontrolled downstream flooding is anticipated, local disaster

management and law enforcement personnel should notify those downstream, forevacuation in the

most expedient manner possible. The organizations and personnel on the Notification Flowchart

should be contacted immediately. Local law enforcement officials, along with local mobile network

operators, radio and television stations can best spread the notice for evacuation. The immediate im-

pact will be to areas along Yagachi river downstream of the dam. For sunny-day and design flood

breaches, the following actions should be taken:

• Barricading all bridges that could possibly be flooded to prevent access to the affected area.

These bridges include the Yagachi River Crossings See the Inundation Map in Tab 2 to de-

termine appropriate barricade locations.

• The District Disaster Management office can assist with the notification of all persons and

agencies involved, with the possibility of additional support—including contacting others not

accessible by radio or telephone.

• District officials are generally familiar with developed areas in their jurisdiction. Such

knowledge, coupled with the requirements of state law that they respond to disasters, make

them the logical officials to be notified and to spread the warning message to all areas subject

to flooding.

8. Implementation

8.1. Development

The draft EAP was sent to the SDSO for review, and agency comments were incorporated into this

document, a copy of which is currently on file with the SDSO.

8.2. Updating



Copies of the EAP have been provided to the appropriate persons and the EAP has been approved and

signed by the owner and the person(s) in charge of emergency response, as shown on the Distribution

List and Approval and Implementation sheets at the front of the report. This plan will be reviewed and

updated annually by Executive Engineer and personnel from local disaster management agencies in

conjunction with Executive Engineer’s annual maintenance inspection of the dam. The Executive

Engineerwill review and complete all items on theAnnual EAP Evaluation Checklist in Tab 7. After

the annual update is complete, a newApproval and Implementation sheet will be attached and the an-

nual update will be documented on the Plan Review and Update sheet in Tab 8.

If revisions to the EAP are made as a result of the annual update, such changes will be recorded on the

Log Sheet of Changes form at the front of the report. A copy of the updated portions of the EAP will

be sent to the SDSO and all other concerned as per the EAP Distribution List. If the EAP was re-

viewed and revisions were not required, the Cauvery Neeravari Nigam Limited will submit written

notification to all concernedthat no updates to the EAP have been adopted or implemented.

8.3. Testing

A table top drill will be conducted at least once every five years. The table top drill involves a meet-

ing of Executive Engineerwith local and state disaster management officials in a conference room.

The drill begins with a description of some simulated event and proceedswith discussions by the par-

ticipants to evaluate the EAP and response procedures, and to resolve concerns regarding coordination

and responsibilities. Any problems identified during a drill should be included in revisions to the

EAP. Records of training and drills will be maintained in Tab 9.

8.4. Training

All people involved in the EAP will be trained to ensure that they are thoroughly familiar with its el-

ements, the availability of equipment, and their responsibilities and duties under the plan. Personnel

will be trained in problem detection, evaluation, and appropriate corrective measures. This training is

essential for proper evaluation of developing situations at all levels of responsibility. Training records

will be maintained in Tab 9.



Tab 1

Vicinity Map

•



Tab 2

Inundation Map

Flood Inundation Maps for Votehole Dam

March 14, 2017

Mar - 17



Flood Inundation Maps for

Votehole Dam, Karnataka

Doc. No. CDSO_MAP_DS_61

CENTRAL WATER COMMISSION, MINISTRY OF WATER RESSOURCES 3rd Floor, New Library Building, R.K. Puram, New Delhi 110066



Flood Inundation Maps for Votehole Dam Mar - 17

Quality Control:

Version

1

Date

14/03/17

Writers/Contributors

David Froehlich (DF)

David González (DG)

Sunil Kumar (SK)

Subhodip Mukherjee (SM)

Checked by

David Froehlich (DF)

Issued/Copied to:

I/C

Issued

Date

14/03/17

Name

Shri Pramod Narayan

Organization

Central Water Commission

Doc. No. CDSO_MAP_DS_61 Page i




Table of Contents

Overview ......................................................................................................................................................... 1

Dam Breach Floods .................................................................................................................................... 1

Large Controlled Release Flood ................................................................................................................. 1

Inundation Maps ............................................................................................................................................. 1

Digital Elevation Model Description............................................................................................................. 1

DVD Directory Structure ................................................................................................................................. 2

Flood Hazard Reference Values..................................................................................................................... 2

Estimated Population .................................................................................................................................. 2

References ..................................................................................................................................................... 4

Appendix A – Flood Inundation Maps ..........................................................................................................A-1

Appendix B - DVD........................................................................................................................................B-1

Doc. No. CDSO_MAP_DS_61 Page ii




Project Identification

Dam Owner

Dam Operator

Project ID Code

Project Name

Karnataka Water Resources Department

KAWRD

KA06HH0154

Votehole Dam

Project Location

State

District

River/Stream

Latitude

Longitude

Karnataka

Hassan

Votehole

13° 3'29.75"

75°54'36.22"

OVERVIEW

Flood inundation maps that can be used to prepare Tier 1 Emergency Action Plans (EAPs) for Votehole Dam are herewith transmitted on the accompanying DVD. See the Guidelines for Preparing Emergency Action Plans for Dams (CWC 2016) for a description of Tier 1 EAPs. Also included on the DVD are all data used to simulate flooding using the HEC-RAS computer model (Brunner 2016).

Inundation maps have been prepared for the following three causes of flooding:

1. A dam failure caused by overtopping from the inflow design flood leading to breaching and uncontrolled release of impounded water.

2. A non-flood dam failure caused by internal erosion (piping) with the reservoir at full supply level (often called a “fair-weather failure”) leading to breaching and uncontrolled release of impounded water.

3. A large controlled-release flood without dam failure.

Dam Breach Floods

Dam failure floods resulting in breaching from overtopping by floodwaters and from internal erosion (piping) were simulated by solving numerically the two-dimensional, depth-averaged flow equations on an unstructured computational mesh using the HEC-RAS computer program (Brunner 2016). Breaches were modeled as trapezoidal openings that form at the crest of the dam and then grow in size, first vertically downward until the specified breach bottom elevation is reached, and then horizontally as outflows continue to widen the opening . Breach parameters required by the model are summarized in Table 1.

Large Controlled Release Flood

Flooding caused by a steady large controlled-release (LCR) from the reservoir was simulated to provide an idea of the hazard produced by a non-failure event. For Votehole Dam, the LCR discharge was the published spillway capacity of 577 m3/s (Revised Flood Routing)

INUNDATION MAPS

Inundation maps showing 1) maximum water depth, 2) maximum water velocity, and 3) maximum water-surface elevation were prepared for each of the three flooding cases considered. An additional map showing the time of arrival of the flood wave since the start of failure (that is, since the initiation of breaching) is provided for each of the dam breach floods (overtopping and piping). All flood inundation maps are attached to this report as Appendix A.

Digital Elevation Model Description

The digital elevation model (DEM) used to prepare the two-dimensional computational mesh used to simulate flooding was derived from the Japan Aerospace Exploration Agency (JAXA) global digital surface model (DSM) dataset with a horizontal resolution of approximately 30 meters (1 arc-sec) (Takaku et al. 2014). The dataset is based on the DSM dataset (5-meter mesh version) of the "World 3D Topographic Data", which is the most precise global-scale elevation data at this time, and its elevation precision is also at a world-leading level as a 30-meter mesh version (Tadono et al. 2014). The height accuracy of the 30-meter DEM is 5 meters (root-mean-square-error).

Doc. No. CDSO_MAP_DS_61 Page 1 of 5



Flood Inundation Maps for Votehole Dam

TABLE 1. Trapezoidal Dam Breach Model Parametersa and Calculated Dam Breach Flood Peak Discharges

Dam Failure Mode

Breach parameter Units Overtopping

Height

Bottom width

Average side slope (horz : vert)

Formation time

Calculated peak discharge

a

Mar - 17

Internal erosion (piping)

44.48

56

0.7 : 1

0.82

9,946

m

m

--

h

m3/s

44.48

80

1:1

0.85

13,315

Parameters of the trapezoidal dam breach model used in HEC-RAS (Brunner 2016)

DVD DIRECTORY STRUCTURE

All data needed to carry out two-dimensional depth-averaged flow simulations of the three flooding cases using the HEC-RAS computer program, solution output files, and output maps prepared using generated solutions are included on the accompanying DVD. Files on DVD are organized in folders as shown in Figure 1.

Dam Name – State o Common Data o Model Data Large Controlled Release Overtopping Failure Piping Failure o Output Maps Large Controlled Release Overtopping Failure Piping Failure

Figure 1. DVD Directory structure of Tier 1 EAP data for the dam

The Common Data folder contains information that was used in all three flood simulations including digital terrain models, and land use/land cover data used to assign roughness coefficients to the computational mesh.

The DVD is attached to this report as Appendix B.

FLOOD HAZARD REFERENCE VALUES

Flood hazard reference values consisting of maximum water depth, maximum depth-averaged velocity, and flood wave arrival time at various locations downstream from Votehole Dam are presented in Table 2. Reference values were determined close to the identified positions and represent the degree of danger that would be created by the flood. Flood wave arrival times are provided only for the two dam breach scenarios (that is, failures caused by overtopping and internal erosion.)

Estimated Population

The estimated population for each settlement was obtained using the fourth version of “The Gridded Population of the World” (GPWv4), which is a gridded data product of globally-integrated national population data from the 2010 round of Population and Housing Censuses. The gridded data sets are constructed from national or subnational input





administrative units. GPWv4 is gridded with an output resolution of 30 arc-seconds, or ~1 km at the equator. (CIESIN, 2016)

The grids represent persons per square kilometer for each of the five target years: 2000, 2005, 2010, 2015, and 2020. For Votehole Dam the population density extrapolated to the year 2020 was used.





REFERENCES

Brunner, G. W. (2016). “HEC-RAS River Analysis System User’s Manual, Version 5.0.” Report Number CPD-68, U.S. Army Corps of Engineers, Institute for Water Resources, Hydrologic Engineering Center, Davis, California.

CIECIN - Columbia University (Center for International Earth Science Information Network), (2016). “Documentation for the Gridded Population of the World, Version 4 (GPWv4)”. Palisades NY: NASA Socioeconomic Data and Applications Center (SEDAC).

CWC (Central Water Commission) (2016). “Guidelines for Preparing Emergency Action Plans for Dams.” Document Number CDSO_GUD_DS_01_v2.0, Ministry of Water Resources, River Development & Ganga Rejuvenation, New Delhi, India.

Tadono, T., Ishida, H., Oda, F., Nait, S., Minakawa, K., and Iwamoto, H. (2014). “Precise Global DEM Generation by ALOS PRISM.” Proceedings of the ISPRS Technical Commission IV Symposium, 14–16 May 2014, Suzhou, China, Vol. II-4, 71-76.

Takaku, J., Tadono, T., and Tsutsui, K. (2014). “Generation of High Resolution Global DSM from ALOS PRISM.” Proceedings of the ISPRS Technical Commission IV Symposium, 14–16 May 2014, Suzhou, China, Vol. XL-4, 243-248.




Flood Inundation Maps for Votehole Dam Table 2. Flood Hazard Reference Values

Overtopping Failure

Location Distancea downstream from dam (km)

Estimated populationb (people)

Maximum depthc (m)

Maximum velocityc (m/s)

Flood wave arrival timed (hh:mm)

Non-flood Failure

Maximum depthc (m)


Flood wave arrival timed (hh:mm)

Mar - 17

Large Controlled Release

Maximum depthc (m)


Nilavagilu Paduvalalu Kuppe Hosahalli Doddihalli 1 Doddihalli 2 Doddihalli / Jannapura Bommenahalli Chikkanagalu Bellur Bandithimmanahalli Mudigere Agasarahatti Mavanoor 1 Mavanoor 3 Mavanoor 4 N.D.R.K. Institute Of Technology Thimmanahalli 1 Kandali 1 Kandali 2 Uppahalli 4 Uppahalli 2 Uppahalli 1 Kadalu

a b

2.3 2.5 3.2 3.9 4.3 4.9 5.2 7.4 9.3 10.4 12.5 13 14.4 15.1 15.2 15.3 15.8 16.7 16.9 16.9 17.8 18 18.6

20 7 22 9 2 17 4 3 22 1 5 53 2 2 17 45 25 2 19 2 3 2 4

0.63 1.07 3.57 2.88 2.98 0.07 3.93 4.92 5.13 2.02 5.54 0.78 5.62 4.19 6.1 5.74 2.29 0.03 3.03 0.28 4.34 0.01 1.87

0.61 3.01 1.89 2.32 1.8 2.8 1.32 2.13 0.94 1.2 1.16 0.52 1.16 1.73 1.11 1.11 0.82 0.63 0.22 0.67 1.29 0.1 1.62

00:48 00:41 00:48 00:55 00:54 01:05 01:03 01:29 01:48 02:23 02:40 04:02 03:00 03:32 03:18 03:25 03:59 05:25 04:23 04:52 04:22 05:22 06:13

0.2 0.63 3.14 2.45 2.53 ‐‐‐ 3.58 4.62 4.8 1.65 5.09 0.38 5.17 3.75 5.66 5.36 2.08 ‐‐‐ 2.85 0.06 4.13 ‐‐‐ 1.48

0.55 2.28 1.8 2.19 1.7 ‐‐‐ 1.27 2.05 0.89 1.15 1.12 0.37 1.12 1.68 1.07 1.03 0.75 ‐‐‐ 0.18 0.61 1.17 ‐‐‐ 1.55

01:00 00:50 00:56 01:04 01:02 ‐‐‐ 01:11 01:38 01:57 02:34 02:51 04:32 03:12 03:45 03:30 03:38 04:15 ‐‐‐ 04:39 05:13 04:38 ‐‐‐ 06:37

‐‐‐d ‐‐‐ ‐‐‐ ‐‐‐ ‐‐‐ ‐‐‐ 0.08 1.8 2.73 ‐‐‐ 3.25 ‐‐‐ 3.64 2.33 4.23 4.06 1.47 ‐‐‐ 2.37 ‐‐‐ 3.1 ‐‐‐ 0.47

‐‐‐ ‐‐‐ ‐‐‐ ‐‐‐ ‐‐‐ ‐‐‐ 0.46 1.22 0.42 ‐‐‐ 0.52 ‐‐‐ 0.54 1.03 0.57 0.58 0.33 ‐‐‐ 0.05 ‐‐‐ 0.75 ‐‐‐ 1.21

Approximate shortest distance downstream from dam. Estimated population within the assumed settlement boundaries. cMaximum value near the specified location, which usually occurs near the center of the stream. dFlood wave arrival time is the time since the initiation of the dam breach until the settlement is inundated. eLocation not inundated.





APPENDIX A – FLOOD INUNDATION MAPS

Attached to this report are flood inundation maps showing 1) maximum water depth, 2) maximum water velocity, and 3) maximum water-surface elevation were prepared for each of the three flooding cases considered. An additional map showing the time of arrival of the flood wave since the start of failure (i.e., since the initiation of breaching) is provided for each of the dam breach floods (overtopping and piping). Each map consists of two panels.

Doc. No. CDSO_MAP_DS_61 Page A-1




APPENDIX B - DVD

All data needed to carry out two-dimensional depth-averaged flow simulations of the three flooding cases using the HEC-RAS computer program, solution output files, and output maps prepared using generated solutions are included on the accompanying DVD.

Doc. No. CDSO_MAP_DS_61



75°55'E 75°56'E 75°57'E 75°58'E 75°59'E 76°E 76°1'E 76°2'E 76°3'E

¯

YEDEHALLI THENDEGERECHATRANAHALLI

PADUVALALU RAJANAHALLI / CHENNENAHALLI

JINIGENAHALLIBOMMENAHALLI

Votehole Dam NILAVAGILU DODDIHALLI / JANNAPURA

13°6'N VOTEHOLE DAM, KARNATAKA

OVERTOPPING FAILURE

FLOOD WAVE ARRIVAL TIME*

13°5'N Arrival Time (Hrs.)

0-1 1-2 2-3 3-4 4-5 5-6 6-7 7-8 8-9 9 - 10 RAILWAYS ROADS SETTLEMENTS

13°3'N

13°4'N

DODDIHALLI 1 KUPPE HOSAHALLIDODDIHALLI 2

13°2'N CHIKKANAGALU

*Time since initiation of breach Locator Map

13°1'N 1

BELLUR BELLUR 2

BANDITHIMMANAHALLI 13°N

MUDIGERE 0

BASAVANAPURA

Source: Esri, DigitalGlobe, GeoEye, Earthstar Geographics, CNES/Airbus DS, USDA, USGS,

0.5 1 2 Km

Central Project Management Unit AGASARAHATTI

MAVANOOR 1 12°59'N

Dam Rehabilitation and Improvement Project Doc. No. CDSO_MAP_DS_61 Date : March 2017

Map No. KANDALI 2 MAVANOOR 4 Source: Esri, DigitalGlobe, GeoEye, Earthstar Geographics, CNES/Airbus DS, USDA, USGS, AeroGRID, IGN, and the GIS UserMAVANOOR 3 Community THIMMANAHALLI 1

75°55'E 75°56'E 75°57'E 75°58'E 75°59'E 76°E 76°1'E 76°2'E 76°3'E

1/2



75°59'E 76°E

BANDITHIMMANAHALLI

76°1'E 76°2'E 76°3'E 76°4'E 76°5'E 76°6'E 76°7'E

13°N MUDIGERE

BASAVANAPURA

AGASARAHATTI MAVANOOR 1

¯

MAVANOOR 3 THIMMANAHALLI 1 KANDALI 1 THIMMANAHALLI 2

MAVANOOR 4 KANDALI 2

UPPAHALLI 4

UPPAHALLI 3 HALUVAGILU UPPAHALLI 2HALUVAGILU UPPAHALLI 1

VOTEHOLE DAM, KARNATAKA

OVERTOPPING FAILURE


Arrival Time (Hrs.) 0-1 1-2 2-3 3-4 4-5 5-6 6-7 7-8 8-9 9 - 10

12°59'N

N D R K INSTITUTE OF TECHNOLOGY

12°58'N

RAILWAYS ROADS SETTLEMENTS

12°56'N

12°57'N KIRAGADALU

*Time since initiation of breach KADALU Locator Map

1 12°55'N

2


12°54'N 0 0.5 1 2

Km

Dam Rehabilitation and Improvement Project Date : March 2017 Doc. No. CDSO_MAP_DS_61

Central Project Management Unit

12°53'N Source: Esri, DigitalGlobe, GeoEye, Earthstar Geographics, CNES/Airbus DS, USDA, USGS, AeroGRID, IGN, and the GIS User Community

75°59'E 76°E 76°1'E 76°2'E 76°3'E 76°4'E 76°5'E 76°6'E 76°7'E

2/2 Map No.



75°55'E

13°6'N

75°56'E 75°57'E 75°58'E 75°59'E 76°E 76°1'E 76°2'E 76°3'E

¯






OVERTOPPING FAILURE

MAXIMUM DEPTH 13°5'N Depth (m)

0-1 1-2 2-3 3-4 4-5 5-6 6-7 7-8 8-9 9 - 10

13°4'N

10 - 11 11 - 12 RAILWAYS ROADS SETTLEMENTS 13°3'N



Locator Map

13°1'N 1

BELLUR BELLUR 2

BANDITHIMMANAHALLI 13°N MUDIGERE

BASAVANAPURA


KANDALI 2 MAVANOOR 4 Source: Esri, DigitalGlobe, GeoEye, Earthstar Geographics, CNES/Airbus DS, USDA, USGS, AeroGRID, IGN, and the GIS UserMAVANOOR 3 Community THIMMANAHALLI 1 75°59'E 76°E 76°1'E 76°2'E 76°3'E

0


0.5 1 2 Km



12°59'N 1/2 Map No.

75°55'E 75°56'E 75°57'E 75°58'E



75°59'E 76°E

BANDITHIMMANAHALLI

76°1'E 76°2'E 76°3'E 76°4'E 76°5'E 76°6'E 76°7'E

13°N MUDIGERE

BASAVANAPURA


¯



UPPAHALLI 4



OVERTOPPING FAILURE

MAXIMUM DEPTH Depth (m)

0-1 1-2 2-3 3-4 4-5 5-6 6-7 7-8 8-9 9 - 10

12°59'N


12°58'N 10 - 11 11 - 12 RAILWAYS ROADS

12°56'N

12°57'N KIRAGADALU SETTLEMENTS

KADALU Locator Map

1 12°55'N

2


12°54'N 0 0.5 1 2

Km




75°59'E 76°E 76°1'E 76°2'E 76°3'E 76°4'E 76°5'E 76°6'E 76°7'E

2/2 Map No.



75°55'E

13°6'N

75°56'E 75°57'E 75°58'E 75°59'E 76°E 76°1'E 76°2'E 76°3'E

¯






OVERTOPPING FAILURE

MAXIMUM VELOCITY Velocity (m/s)

0-1 1-2 2-3 3-4 4-5 5-6 6-7 RAILWAYS ROADS SETTLEMENTS

13°3'N

13°4'N

13°5'N



Locator Map

13°1'N 1

BELLUR BELLUR 2


BASAVANAPURA


KANDALI 2 MAVANOOR 4 Source: Esri, DigitalGlobe, GeoEye, Earthstar Geographics, CNES/Airbus DS, USDA, USGS, AeroGRID, IGN, and the GIS UserMAVANOOR 3 Community THIMMANAHALLI 1 75°59'E 76°E 76°1'E 76°2'E 76°3'E

0


0.5 1 2 Km



12°59'N 1/2 Map No.

75°55'E 75°56'E 75°57'E 75°58'E



75°59'E 76°E

BANDITHIMMANAHALLI

76°1'E 76°2'E 76°3'E 76°4'E 76°5'E 76°6'E 76°7'E

13°N MUDIGERE

BASAVANAPURA


¯



UPPAHALLI 4



OVERTOPPING FAILURE


0-1 1-2 2-3 3-4 4-5 5-6 6-7 RAILWAYS ROADS SETTLEMENTS

12°59'N


12°58'N

12°56'N

12°57'N KIRAGADALU

KADALU Locator Map

1 12°55'N

2


12°54'N 0 0.5 1 2

Km




75°59'E 76°E 76°1'E 76°2'E 76°3'E 76°4'E 76°5'E 76°6'E 76°7'E

2/2 Map No.



75°55'E

13°6'N

75°56'E 75°57'E 75°58'E 75°59'E 76°E 76°1'E 76°2'E 76°3'E

¯

YEDEHALLI

953


OVERTOPPING FAILURE

MAXIMUM WATER SURFACE ELEVATION

WSE ( m - MSL ) 894 - 898 898 - 902 902 - 906 906 - 909 909 - 913 913 - 917 917 - 920 920 - 924 924 - 927 927 - 931

13°5'N

13°4'N 959 956 THENDEGERECHATRANAHALLI

948 962

935 BOMMENAHALLI

94 6 931 - 934 934 - 938 938 - 942 942 - 945 945 - 949 949 - 953 953 - 957 957 - 961

933

93 2

13°3'N Votehole Dam NILAVAGILU

944

94 1

93 9 934

KUPPE HOSAHALLI 942 961 - 963 CONTOUR RAILWAYS ROADS 13°2'N SETTLEMENTS

93 0 Locator Map

929

13°1'N 92 7

1

2

92 6

BELLUR

13°N 925


924 BASAVANAPURA

AGASARAHATTI

923

0 0.5 1 2 Km



12°59'N

75°55'E 75°56'E 75°57'E 75°58'E Source: Esri, DigitalGlobe, GeoEye, Earthstar Geographics, CNES/Airbus DS, USDA, USGS, AeroGRID, IGN, and the GIS UserMAVANOOR 3 Community THIMMANAHALLI 1 75°59'E 76°E 76°1'E 76°2'E 76°3'E

MAVANOOR 4 KANDALI 2 1/2 Map No.



75°59'E 76°E

BANDITHIMMANAHALLI

76°1'E 76°2'E 76°3'E 76°4'E 76°5'E 76°6'E 76°7'E

BASAVANAPURA

AGASARAHATTI

923

¯

MAVANOOR 4 KANDALI 2 MAVANOOR 3 THIMMANAHALLI 1 KANDALI 1

92 2 921

13°N 924


OVERTOPPING FAILURE


WSE ( m - MSL ) 894 - 898 898 - 902 902 - 906 906 - 909 909 - 913 913 - 917 917 - 920 920 - 924

12°59'N

925


918 12°58'N 5

924 - 927 927 - 931 931 - 934 934 - 938 938 - 942 942 - 945 945 - 949 949 - 953 953 - 957 957 - 961 961 - 963

913

KIRAGADALU 12°57'N 907

91

909

906 905 CONTOUR

RAILWAYS ROADS

12°56'N 904

SETTLEMENTS

Locator Map 900 90

90 2 3

899 1

12°55'N 898 2

897

895 12°54'N


0 0.5 1 2 Km

89 6




75°59'E 76°E 76°1'E 76°2'E 76°3'E 76°4'E 76°5'E 76°6'E 76°7'E

2/2 Map No.



75°55'E 75°56'E 75°57'E 75°58'E 75°59'E 76°E 76°1'E 76°2'E 76°3'E

¯






NON - FLOOD FAILURE


13°5'N Arrival Time (Hrs.)

0-1 1-2 2-3 3-4 4-5 5-6 6-7 7-8 8-9 9 - 10 RAILWAYS ROADS SETTLEMENTS

13°3'N

13°4'N




13°1'N 1

BELLUR BELLUR 2


MUDIGERE 0

BASAVANAPURA


0.5 1 2 Km


MAVANOOR 1 12°59'N



75°55'E 75°56'E 75°57'E 75°58'E 75°59'E 76°E 76°1'E 76°2'E 76°3'E

1/2



75°59'E 76°E 76°1'E 76°2'E 76°3'E 76°4'E 76°5'E 76°6'E 76°7'E


BASAVANAPURA ¯

MAVANOOR 1 MAVANOOR 4


KANDALI 2

UPPAHALLI 4



NON - FLOOD FAILURE


Arrival Time (Hrs.) 0-1 1-2 2-3 3-4 4-5 5-6 6-7 7-8 8-9 9 - 10 RAILWAYS ROADS SETTLEMENTS

AGASARAHATTI

12°59'N


12°58'N

12°56'N

12°57'N KIRAGADALU


KADALU

1 12°55'N

2


12°54'N 0 0.5 1 2

Km Central Project Management Unit


Map No. 12°53'N Source: Esri, DigitalGlobe, GeoEye, Earthstar Geographics, CNES/Airbus DS, USDA, USGS, AeroGRID, IGN, and the GIS User

Community 75°59'E 76°E 76°1'E 76°2'E 76°3'E 76°4'E 76°5'E 76°6'E 76°7'E

2/2



75°55'E 75°56'E 75°57'E 75°58'E 75°59'E 76°E 76°1'E 76°2'E 76°3'E

¯






NON - FLOOD FAILURE

MAXIMUM DEPTH 13°5'N Depth (m)

0-1 1-2 2-3 3-4 4-5 5-6 6-7 7-8 8-9 9 - 10 10 - 11 11 - 12 RAILWAYS ROADS SETTLEMENTS 13°3'N

13°4'N



Locator Map

13°1'N 1

BELLUR BELLUR 2


MUDIGERE 0

BASAVANAPURA


0.5 1 2 Km


MAVANOOR 1 12°59'N



75°55'E 75°56'E 75°57'E 75°58'E 75°59'E 76°E 76°1'E 76°2'E 76°3'E

1/2



75°59'E 76°E 76°1'E 76°2'E 76°3'E 76°4'E 76°5'E 76°6'E 76°7'E


BASAVANAPURA ¯



KANDALI 2

UPPAHALLI 4



NON - FLOOD FAILURE


0-1 1-2 2-3 3-4 4-5 5-6 6-7 7-8 8-9 9 - 10 10 - 11 11 - 12 RAILWAYS ROADS SETTLEMENTS

AGASARAHATTI

12°59'N


12°58'N

12°56'N

12°57'N KIRAGADALU

Locator Map KADALU

1 12°55'N

2


12°54'N 0 0.5 1 2





2/2



75°55'E 75°56'E 75°57'E 75°58'E 75°59'E 76°E 76°1'E 76°2'E 76°3'E

¯






NON - FLOOD FAILURE

MAXIMUM VELOCITY 13°5'N Velocity (m/s)

0-1 1-2 2-3 3-4 4-5 5-6 RAILWAYS ROADS SETTLEMENTS

13°3'N

13°4'N



Locator Map

13°1'N 1

BELLUR BELLUR 2


MUDIGERE 0

BASAVANAPURA


0.5 1 2 Km


MAVANOOR 1 12°59'N



75°55'E 75°56'E 75°57'E 75°58'E 75°59'E 76°E 76°1'E 76°2'E 76°3'E

1/2



75°59'E 76°E 76°1'E 76°2'E 76°3'E 76°4'E 76°5'E 76°6'E 76°7'E


BASAVANAPURA ¯



KANDALI 2

UPPAHALLI 4



NON - FLOOD FAILURE



AGASARAHATTI

12°59'N


12°58'N

12°56'N

12°57'N KIRAGADALU

Locator Map KADALU

1 12°55'N

2


12°54'N 0 0.5 1 2





2/2



75°55'E 75°56'E 75°57'E 75°58'E 75°59'E 76°E 76°1'E 76°2'E 76°3'E

934 ¯

THENDEGERECHATRANAHALLI


NON - FLOOD FAILURE


WSE ( m - MSL ) 894 - 897 897 - 901 901 - 904 904 - 907 907 - 911 911 - 915

13°5'N

YEDEHALLI 13°4'N 951

954 958 956 915 - 919 919 - 923 923 - 926 926 - 930 930 - 933

PADUVALALU 961

946 JINIGENAHALLI

Votehole Dam NILAVAGILU 93

9

BOMMENAHALLI 93 5 933 - 936

936 - 941 941 - 944 944 - 948 948 - 952 952 - 955

13°3'N DODDIHALLI / JANNAPURA 943

94 1

KUPPE HOSAHALLI 933 955 - 959 959 - 962 CONTOUR RAILWAYS ROADS

CHIKKANAGALU 13°2'N 932

SETTLEMENTS

13°1'N

928 Locator Map

92 7 1

BELLUR BELLUR 2

92 6

92 13°N

5

924 MUDIGERE 0


0.5 1 2 Km BASAVANAPURA

923 Central Project Management Unit

Dam Rehabilitation and Improvement Project Doc. No. CDSO_MAP_DS_61 AGASARAHATTI

MAVANOOR 1 12°59'N

Date : March 2017 MAVANOOR 4 KANDALI 2 Map No.

Source: Esri, DigitalGlobe, GeoEye, Earthstar Geographics, CNES/Airbus DS, USDA, USGS, AeroGRID, IGN, and the GIS User 922Community

75°55'E 75°56'E 75°57'E 75°58'E 75°59'E 76°E 76°1'E 76°2'E 76°3'E

1/2



75°59'E 76°E 92 5

76°1'E 76°2'E 76°3'E 76°4'E 76°5'E 76°6'E 76°7'E

13°N

BASAVANAPURA 923

924 MUDIGERE ¯



NON - FLOOD FAILURE


WSE ( m - MSL ) 894 - 897 897 - 901 901 - 904 904 - 907 907 - 911


12°59'N 922 THIMMANAHALLI 1

KANDALI 1

921 N D R K INSTITUTE OF TECHNOLOGY 920 911 - 915

915 - 919 919 - 923 923 - 926 926 - 930 930 - 933 933 - 936 936 - 941 941 - 944

12°58'N 915

917 913

12°57'N KIRAGADALU 944 - 948 948 - 952 952 - 955

90 8

906 955 - 959 959 - 962 CONTOUR RAILWAYS

904 12°56'N

ROADS SETTLEMENTS

903 899 Locator Map

902

898 12°55'N

1

2 897

894 12°54'N


0 0.5 1 2 Km

89 6

895

Central Project Management Unit Dam Rehabilitation and Improvement Project Doc. No. CDSO_MAP_DS_61 Date : March 2017



2/2



75°55'E 75°56'E 75°57'E 75°58'E 75°59'E 76°E 76°1'E 76°2'E 76°3'E

¯






LARGE CONTROLLED RELEASE

MAXIMUM DEPTH 13°5'N

Depth (m) 0-1 1-2 2-3 3-4 4-5 5-6 RAILWAYS ROADS SETTLEMENTS

13°3'N

13°4'N



Locator Map

13°1'N 1

BELLUR BELLUR 2


MUDIGERE 0

BASAVANAPURA


0.5 1 2 Km


MAVANOOR 1 12°59'N



75°55'E 75°56'E 75°57'E 75°58'E 75°59'E 76°E 76°1'E 76°2'E 76°3'E

1/2



75°59'E 76°E 76°1'E 76°2'E 76°3'E 76°4'E 76°5'E 76°6'E 76°7'E


BASAVANAPURA ¯



KANDALI 2

UPPAHALLI 4






AGASARAHATTI

12°59'N


12°58'N

12°56'N

12°57'N KIRAGADALU

Locator Map KADALU

1 12°55'N

2


12°54'N 0 0.5 1 2





2/2



75°55'E 75°56'E 75°57'E 75°58'E 75°59'E 76°E 76°1'E 76°2'E 76°3'E

¯







MAXIMUM VELOCITY 13°5'N

Velocity (m/s) 0 - 0.5 0.5 - 1.0 1.0 - 1.5 1.5 - 2.0 2.0 - 2.5 2.5 - 3.0 RAILWAYS ROADS SETTLEMENTS

13°3'N

13°4'N



Locator Map

13°1'N 1

BELLUR BELLUR 2


MUDIGERE 0

BASAVANAPURA


0.5 1 2 Km


MAVANOOR 1 12°59'N



75°55'E 75°56'E 75°57'E 75°58'E 75°59'E 76°E 76°1'E 76°2'E 76°3'E

1/2



75°59'E 76°E 76°1'E 76°2'E 76°3'E 76°4'E 76°5'E 76°6'E 76°7'E


BASAVANAPURA ¯



KANDALI 2

UPPAHALLI 4





0 - 0.5 0.5 - 1.0 1.0 - 1.5 1.5 - 2.0 2.0 - 2.5 2.5 - 3.0 RAILWAYS ROADS SETTLEMENTS

AGASARAHATTI

12°59'N


12°58'N

12°56'N

12°57'N KIRAGADALU

Locator Map KADALU

1 12°55'N

2


12°54'N 0 0.5 1 2





2/2



75°55'E 75°56'E 75°57'E 75°58'E 75°59'E 76°E 76°1'E 76°2'E 76°3'E

¯

YEDEHALLI 95

0 948




WSE ( m - MSL ) 890 - 895 895 - 900 900 - 905 905 - 910 910 - 915 915 - 920

13°4'N

13°5'N

THENDEGERECHATRANAHALLI 9 44

1 94

931

920 - 925 925 - 930 930 - 935 935 - 940 940 - 945 945 - 950 950 - 955 CONTOUR 13°3'N Votehole Dam NILAVAGILU

DODDIHALLI / JANNAPURA 929

93 9

6 93

953

JINIGENAHALLI

937 RAILWAYS ROADS SETTLEMENTS DODDIHALLI 1

DODDIHALLI 2 KUPPE HOSAHALLI

13°2'N 928

13°1'N

92 Locator Map 6

925 1

BELLUR BELLUR

924 2

92 13°N

3

MUDIGERE 922


0 0.5 1 2 Km BASAVANAPURA

Central Project Management Unit AGASARAHATTI Dam Rehabilitation and Improvement Project

Doc. No. CDSO_MAP_DS_61 Date : March 2017

12°59'N KANDALI 2 MAVANOOR 4 Source: Esri, DigitalGlobe, GeoEye, Earthstar Geographics, CNES/Airbus DS, USDA, USGS, AeroGRID, IGN, and the GIS User MAVANOOR 3 Community THIMMANAHALLI 1

92 1 Map No. 1/2

75°55'E 75°56'E 75°57'E 75°58'E 75°59'E 76°E 76°1'E 76°2'E 76°3'E


75°59'E 76°E 92 3

76°1'E 76°2'E 76°3'E 76°4'E 76°5'E 76°6'E 76°7'E

13°N MUDIGERE 922

BASAVANAPURA ¯

92




AGASARAHATTI

12°59'N MAVANOOR 4 MAVANOOR 3 THIMMANAHALLI 1 KANDALI 1 THIMMANAHALLI 2

KANDALI 2 WSE ( m - MSL ) 890 - 895 895 - 900 900 - 905 905 - 910 910 - 915 915 - 920

920 N D R K INSTITUTE OF TECHNOLOGY

1

91 9 920 - 925

925 - 930 930 - 935

911

12°58'N UPPAHALLI 3

UPPAHALLI 2 HALUVAGILU 935 - 940 940 - 945 945 - 950 950 - 955 CONTOUR RAILWAYS ROADS SETTLEMENTS

908

12°57'N KIRAGADALU

905

90 4

903 12°56'N

90 899 2

90 1 897

12°55'N

896

89 89

3 5

0 12°54'N 894

Central Project Management Unit Dam Rehabilitation and Improvement Project Doc. No. CDSO_MAP_DS_61 Date : March 2017


75°59'E 76°E 76°1'E 76°2'E 76°3'E 76°4'E 76°5'E 76°6'E 76°7'E



Tab 3

Dam Description

Official Dam Name: Votehole Dam

Name of Stream: Votehole River

Dam Location: near Lakkenahally village, Belur taluk, Hassan Dist.

Latitude/Longitude: Lat 130 3’ 30” N, Lon 750 55’ 00” E

Seismic Zone: Zone III

Year of Starting of Dam Construction: 1976

Year of First Impoundment:1991-92

Year of Commissioning of Dam Project: 2008

Name of Immediate Upstream Dam: No Upstream project

Name of Immediate Downstream Dam: Hemavathy dam, Gorur

Dam Owner: Managing Director, Cauvery Neeravari Nigam Limited, Bengaluru.

Phone Number: 080-22352997,

Dam Owner’s Address: O/O Chief Engineer, CNNL Hemavathy Project Zone, Gorur.

Main Dam

Type Central masonry spillway with side non-overflow

dam with earth flanks.

Year Constructed 1976-1986

Length 900 .00meters

Maximum Height 44.48metres (146’) (from deepest Foundation)

Top Width 5.49 meters

Top of Embankment Elevation 968.48 meters -msl

Main spillway Arrangements

Type : Controlled ogee weir

Location :Centre of the main dam

Crest Level of Spillway :961.476 mtrs

Top Level of Spillway : 966.05 mtrs

Type of Spillway : Ogee Type

Type of gate : Radial gates.

No. of Bays : 3

Size of the gate : Height=4.57mtrs width =9.14 mtrs

Total Spillway capacity of all the Bays : 577.346 Cumecs

Energy Dissipation arrangement :Stilling Basin

Emergency Spillway- Not Available

Embankment

Saddle Dam-1



Type Earthen embankment

(comprising of zoned section having impervious central zone and semi pervious outer zone)

Year Constructed 1976-1986

Length 175.00meters

Maximum Height 26.00meters

Top Width 5.49 meters

Top of Embankment Elevation 968.48 metres-msl

No Spillway Arrangements for Embankment Portion

Inlet-Outlet Works

Right Bank Irrigation Sluice Gates

Type Vertical Lifting with Hoisting Arrangements

Numbers 1 nos

Location Right Bank

Gates 1 Service gate and 1 Emergency gates

Invert Elevation (Inlet) 953.235 metres-msl

Invert Elevation (Outlet) 953.135 metres-msl

Original Capacity 3.88 cumecs

Designed discharge 4.114 Cumecs

Left Bank Sluice Gates

Type Vertical Lifting with Hoisting Arrangments

Numbers 1 nos

Location Left Flank

Gates 1 Service gate and 1 Emergency gates



Original Capacity 0.358 cumecs

River Sluice Gates

Type 0.3 metredia pipe

Numbers 1 nos

Location Left Flank

Gates/valve Valve arrangements



Reservoir

Elev. Top of Conservation Pool 968.48 metres-msl

Capacity Conservation Pool (Normal Pool) 42.75 Mcum (1.51 TMC)

Capacity at Top of Dam (Maximum) 2.85 million of cubic metres

Catchment Area 110.33 Sq Km

Surface area 1468 Acres



Tab 4

Sample Public Announcements

Note:These messages are communicated to downstream residents to alert the public of impending

danger. The Cauvery Neeravari Nigam Limited should coordinate with the India Meteorological De-

partment, the Hassan DistrictDisaster Management Authority, and the District Magistrate/Collector

for Hassan prior to release. Messages can be communicated via radio, television, bulk SMSs of local

mobile networks, and other media outlets.

Announcement for a Slowly Developing “Watch” Condition (BLUE Emergency Level)

Cauvery Neeravari Nigam Limited has declared a BLUE Level “Watch” condition forVotehole Dam,

Project Identification Code [KA06HH0154] as of [time and date]. [Briefly describe the problem or

condition.] Although there is no immediate danger of the dam failing, [Describe what actions are be-

ing taken to monitor and control the situation.] [State the quantity of any releases from the reservoir.]

Announcement for a Worsening “Watch” Condition (BLUE`Emergency Level)

Cauvery Neeravari Nigam Limited has declared a BLUE Level “Watch” condition for Votehole Dam,

Project Identification Code [KA06HH0154] as of [time and date]. [Briefly describe the problem or

condition.] Although there is no immediate danger of the dam failing a possibility now exists that the

dam will fail if correction efforts are unsuccessful. Describe what actions are being taken to monitor

and correct the situation.] [State the quantity of any releases from the reservoir]. Additional news will

be made available as soon as it is received.

Announcement for aProbable“Failure” Condition (ORANGE Emergency Level)

Urgent! This is an emergency message Cauvery Neeravari Nigam Limited has announced that Vote-

hole Dam ,KA06HH0154 is probably going to fail. [Describe what actions are being taken to monitor

and control the situation.] It is possible that the dam will fail in [##] hours. Residents in low lying are-

as along the [Stream], the [Stream], and the [Stream], as well as the town of [Name], should prepare

for immediate evacuation. Additional news will be made available as soon as it is received.

Announcement of an Impending“Failure” Condition (REDEmergency Level)

Emergency! This is an emergency message. Votehole Dam,KA06HH0154is going to fail at any mo-

ment. Residents who have not yet done so should immediately evacuate the city of [Name] and low-

lying areas along the [Stream], the [Stream], and the [Stream]. The flood waters have already reached

[Highway] and [Road]. Additional news will be made available as soon as it is received.

Announcement of an Ongoing “Failure” Condition (REDEmergency Level)

Emergency! This is an emergency message. Votehole Dam, KA06HH0154 failed at [time and date].

Residents who have not yet done so should immediately evacuate the city of [Name] and low-lying

areas along the [Stream], the [Stream], and the [Stream]. The flood waters have already reached

[Highway] and [Road]. Additional news will be made available as soon as it is received.



Tab 5

Evidence of Distress

General

observa-

tion

Specific

observation

Emergency

condition

level

Emergency action Equip-

ment,

material,

and sup-

plies

Data to

record

Boil

s

Small boils, no in-

crease of water flow,

flowing clear water.

BLUE

Closely check all of down-

stream toe, especially in the

vicinity of boil for additional

boils, wet spots, sinkholes, or

seepage. Closely monitor en-

tire area for changes or flow

rate increases.

None Site and

location,

approx-

imate

flow

Large or additional

boils near previously

identified ones, with-

out increasing flow

rate, but carrying

small amount of soil

particles.

BLUE

Initiate 24-hour surveillance.

Monitor as described above.

Construct sandbag ring dikes

around boils, to cover them

with water to retard the

movement of soil particles.

Filter cloth may be used to

retard soil movement, but do

not retard the flow of water.

Sandbags,

filter cloth

Site and

location,

approx-

imate

flow

Large or additional

boils near previously

identified ones, in-

creasing flow rate,

carrying soil parti-

cles.

ORANGE

Continue 24-hour surveil-

lance. Continue monitoring

and remedial action as de-

scribed above. Initiate emer-

gency lowering of the reser-

voir. Issue a warning to down-

stream residents.

Sandbags,

pump

Site and

location,

approx-

imate

flow

Rapidly increasing

size of boils and flow

increasing and mud-

dy water.

RED

Downstream evacuation. Em-

ploy all available equipment to

attempt to construct a large

ring dike around the boil area.

Dozer,

shovels,

source of

earth fill

Site and

location,

approx-

imate

flow

See

pa

ge

Minor seepage of

clear water at toe, on

slope of embank-

ment, or at the abut-

ments.

BLUE

Closely check entire embank-

ment for other seepage areas.

Use wooden stakes or flagging

to delineate seepage area. Try

to channel and measure flow.

Look for upstream whirlpools.

Wooden

stakes,

flagging

Site, lo-

cation,

approx-

imate

flow

Additional seepage

areas observed flow-

ing clear water and/or

increasing flow rate. BLUE


Monitor as described above.

Construct measuring weir and

channel all seepage through

weir. Attempt to determine

source of seepage.

Dozer,

shovels

Site, lo-

cation,

approx-

imate

flow

Seriously or rapidly

increasing seepage,

under-seepage, or

drain flow.

ORANGE

Continue 24-hour monitoring

and remedial action as de-

scribed above. Initiate emer-

gency lowering of the reser-

voir. Construct a large ring

Dozer,

shovels,

source of

fill mate-

rial

Site loca-

tion, ap-

proxi-

mate

flow



General

observa-

tion

Specific

observation

Emergency

condition

level


ment,

material,

and sup-

plies

Data to

record

dike around the seepage area.

Additional seepage

areas with rapid in-

crease in flow and

muddy water.

RED

Downstream evacuation. Em-

ploy all available equipment to

attempt to construct a large

ring dike around the seepage

area.

Dozer,

shovels,

source of

fill mate-

rial

Site loca-

tion, ap-

proxi-

mate

flow

Sli

des

or s

ever

e er

osi

on

Skin slide or slough

on slope of embank-

ment. No further

movement of slide

and embankment

crest not degraded.

BLUE

Examine rest of embankment

for other slides. Place stakes in

slide material and adjacent to

it for determining if further

movement is taking place.

Stakes,

tape

measure

Distance

between

stakes

Slide or erosion in-

volving large mass of

material, crest of em-

bankment is degrad-

ed, no movement or

very slow continuing

movement.

BLUE


Mobilize all available re-

sources and equipment for

repair operations to increase

freeboard and to protect the

exposed embankment materi-

al. Start filling sandbags and

stockpile near slide area.

Dozer,

shovels,

sources of

fill mate-

rial, sand-

bags

Distance

between

stakes




bankment is degrad-

ed, progressively in-

creasing in size.

ORANGE

Continue monitoring and re-

medial actions as described

above. Place additional mate-

rial at the toe of the slope to

stop the slide.

Dozer,

shovels,

source of

fill mate-

rial, pump

Distance

between

stakes




bankment is severely

degraded, movement

of slide is continuing

and may reach pool

level.

RED

Downstream evacuation. Uti-

lize all available equipment

and personnel to sandbag the

degraded slide area to prevent

it from overtopping.

Dozer,

shovels,

sandbags,

pump

Distance

between

stakes

Sin

kh

ole

s

Sinkholes anywhere-

on the embankmentor

within 150 me-

tresdownstream from

the toe.

BLUE

Carefully walk the entire em-

bankment and downstream

area looking for additional

sinkholes, movement, or seep-

age.

Stakes,

flagging

Size,

location

Sinkholes with corre-

sponding seepage

anywhere on the em-

bankment or down-

stream from the toe.

BLUE


Monitor as above. Construct

sandbag dike around the seep-

age exit point to reduce the

flow rate. Start filling sand-

bags and stockpile near sink-

hole.

Dozer,

shovels,

pump

Size,

location

Large sinkholes with

corresponding seep-

age anywhere on the

ORANGE


medial action as described

above. Utilize sandbags to

Sandbags,

dozer,

pump

Size,

location



General

observa-

tion

Specific

observation

Emergency

condition

level


ment,

material,

and sup-

plies

Data to

record

embankment or

downstreamfrom the

toe.

increase the freeboard on the

dam if necessary.

Sinkholes rapidly

getting worse, seep-

age flowing muddy

water and increasing

flow.

RED



and personnel to attempt to

construct a large ring dike

around the area.

Dozer,

shovels,

pump

Size,

location

Set

tlem

ent

Obvious settlement

of the crest of the

embankment, espe-

cially adjacent to

concrete structures.

BLUE

Look for bulges on slope or

changes in crest alignment.

None Size,

location

Settlement of crest of

embankment that is

progressing, especial-

ly adjacent to con-

crete structures or if

any corresponding

seepage is present.

BLUE


Mobilize all available re-

sources for repair operations

to increase freeboard. Fill and

stockpile sandbags. Identify

any boils near settlement

points for flowing material

and pursue

action for boils.

Sandbags,

dozer,

shovels,

source of

fill mate-

rial

Size,

location

Settlement of crest of

embankment that is

rapidly progressing

especially adjacent to

concrete structures or

if any corresponding

seepage is flowing

muddy water or in-

creasing flow.

ORANGE


medial actions as described

above. Use sandbags to in-

crease the freeboard on the

dam if necessary.

Sandbags,

shovels,

dozer,

source of

fill mate-

rial

Size,

location

Progressing settle-

ment that is expected

to degrade the em-

bankment to reser-

voir level. RED



and personnel to build up the

crest in the area that is set-

tling. Identify any boils near

settlement points for flowing

material and pursue action for

boils.

Dozer,

shovels,

source of

fill mate-

rial, sand-

bags

Size,

location

Cra

ckin

g

Cracks in the em-

bankment crest

or on slopes.

BLUE

Walk on entire crest and slope

and check for additional

cracking.

Stakes,

tape

measure

Size,

location

Numerous cracks in

crest that are enlarg-

ing, especially those

perpendicular to the

BLUE


Carefully monitor and meas-

ure cracking to determine the

speed and extent of the prob-

Stakes,

tape

measure,

dozer,

Size,

location



General

observa-

tion

Specific

observation

Emergency

condition

level


ment,

material,

and sup-

plies

Data to

record

centerline of the dam. lem. Mobilize to fill cracks.

Cracks parallel to the center-

line indicate a slide. Follow

remedial action

for slides.

shovels,

source of

fill mate-

rial

Large cracks in the

crest that are rapidly

enlarging, especially

those perpendicular

to the centerline of

the dam.

ORANGE


medial action as described

above.

Dozer,

shovels,

source of

fill mate-

rial

Size,

location

Cracking that extends

to pool elevation.

RED

Downstream evacuation. Con-

tinue remedial actions as de-

scribed above.

Dozer,

shovels,

source of

fill mate-

rial

Size,

location

Cra

ckin

g o

r m

ovem

ent

of

con

cret

e st

ruct

ure

Minor cracking

and/or movement.

BLUE

Immediately install measuring

device to monitor movement.

Crack

Monitors,

stakes,

tape

measure

Size,

location

Significant cracking

and/or movement.

BLUE


Lower burlap on upstream

face of crack to reduce flow of

soil particles. Dump large rock

on downstream of moving

concrete structure monolith to

resist the movement.

Burlap,

rock, doz-

er, shov-

els

Size,

location,

flow rate

Serious cracking

and/or movement ORANGE

Prepare for evacuation. Con-

tinue monitoring and remedial

action as described above.

Dozer,

rock, bur-

lap, crack

monitors

Size,

move-

ment,

flow rate

Major cracking

and/or movement RED

Downstream evacuation. Dam

failure is imminent. Continue

monitoring and remedial ac-

tions as described above.

Dozer,

shovels,

rock

Size,

location,

flow rate

Up

stre

am

wh

irl-

po

ol

Whirlpool in the lake

in the vicinity of the

embankment

RED

Downstream evacuation. At-

tempt to plug the entrance of

the whirlpool with riprap from

the slope of the embankment.

Search downstream for an exit

point and construct a ring dike

to retard the flow of soil parti-

cles.

Dozer, fill

material,

sandbags,

filter

cloth,

straw,

rocks

Size,

location,

flow rate



General

observa-

tion

Specific

observation

Emergency

condition

level


ment,

material,

and sup-

plies

Data to

record

Ma

lfu

nct

ion

of

gate

Structural member of

a gate or gate opera-

tor broken or severe-

ly damaged so as to

prevent operation

of the gate

ORANGE


Immediately place stop logs in

front of gate and initiate nec-

essary actions to get gate re-

paired.

Crane and

welder

Type of

problem,

location

Ra

pid

ly

risi

ng

lak

e

Lake level rising and

rain continuing BLUE

Initiate 24-hour surveillance

of lake level and rainfall.

Generate inflow forecasts eve-

ry 12 hours.

Lake

level,

rainfall

Over

top

pin

g

Water flowing over

the dam and lake

continuing to rise. No

significant erosion of

downstream em-

bankment.

ORANGE

Prepare for evacuation. Con-

tinue monitoring.

Generate inflow forecasts eve-

ry 3 hours.

Dozer, fill

material,

sandbags,

filter

cloth,

rocks

Lake

level,

rainfa

Water flowing over

the dam, the lake

continuing to rise,

and significant ero-

sion of downstream

embankment with

development of head-

cuts encroaching on

the dam crest, or sig-

nificant movement of

sections of concrete

or masonry portions

of the dam.

RED

Immediate evacuation. Dam

failure is imminent or ongo-

ing.

Cameras. Status of

breach

for-

mation.

Width of

breach as

it enlarg-

es.

Project ID Code KA06HH0058.0 Page B-1

Tab 6

Supplies and Resources

The following equipment and supplies may be necessary for use during a dam emergency.

Contact information for local contractors who can provide

the following items during an emergency is listed below. For supplies owned by the dam owner, the

dam owner’s name and the specific location of the supplies have been denoted.

Equipment/Supplies Location Dam Owner Information

Backhoes Dump trucks

Portable welding equipment Generators Bulldozers Excavators

Loaders Motor graders

S.Narayanareddy Class-1 Contractor,

Channarayapatna, Hassan Dist.

Mob:- 9448350350

Manjunatha earth movers


Executive Engineer, Cauvery Neeravari Nigam Limited Hemavathy Dam Division, Gorur.

Name: Gangadhar




Name: Puttaswamy

Title: Asistatnt Engineer (PA to EE)



Crane S.Narayanareddy Class-1 Contractor,


Mob:- 9448350350

Manjunatha earth movers



Name: Gangadhar




Name: Puttaswamy




Sandbags S.Narayanareddy Class-1 Contractor,


Mob:- 9448350350

Sri Banashankari Traders, Tanniruhalla, Hassan.

Mob.9980310323


Name: Gangadhar




Name: Puttaswamy




Rock riprap a) S.Narayanareddy Class-1 Contractor,

Executive Engineer, Cauvery Neeravari Nigam Limited


Channarayapatna, Hassan Dist. Mob:- 9448350350

b) Dananjaya

Class-1 Contractor,

Gorur.

Mob-9448742983

C) B.G.thimmegowda

Class-1 Contractor,

Basavanayakanahalli,

Holenarasipuratq,

Hassan dist. Mob :- 9945981020

Hemavathy Dam Division, Gorur.

Name: Gangadhar




Name: Puttaswamy




Fill Material a) S.Narayanareddy Class-1 Contractor,


b) Dananjaya

Class-1 Contractor,

Gorur

Mob-9448742983

C) B.G.thimmegowda

Class-1 Contractor,

Basavanayakanahalli,

Holenarasipuratq,

Hassan dist. Mob :- 9945981020


Name: Gangadhar




Name: Puttaswamy




Other: a) S.Narayanareddy Class-1 Contractor,



Name: Gangadhar




Name: Puttaswamy





Tab 7

Annual EAP Evaluation Checklist

Was the annual dam inspection con-

ducted?

□ Yes

□ No

If yes, has the EAP been revised

to include any signs of failures

observed during the inspection?

□ Yes

□ No

Was weed clearing, animal burrow

removal, or other maintenance re-

quired?

□ Yes

□ No

If yes, describe actions taken and date:

Was the outlet gate operable? □ Yes

□ No

If no, describe actions taken and date:

Does the Notification Flowcharts re-

quire revision?

(Note that revision of the contact in-

formation will not require EAP ap-

proval; however, the revised contact

information pages will need to be re-

distributed as replacement pages.)

□ Yes

□ No

If yes, list the dates of the contact information

revision and redistribution:

Was annual training or a tabletop drill

conducted?

□ Yes

□ No

Circle: training drill

Date conducted:

Are inspection and training records

included in the EAP?

□ Yes

□ No

Was the EAP reviewed? □ Yes

□ No

If yes, review date:

Were changes required to the EAP? □ Yes

□ No

If yes, date of revised EAP approval:

Chief Engineer

CNNL HPZ Gorur Date:


Tab 8

Plan Review and Update

This plan will be reviewed and updated annually and tabletop drills will be carried out at least once

every five years. Document these reviews below.

Date of review: Participants:




Date of tabletop drill: Participants:


Tab 9

Training Record

Use this form to record training sessions. File the completed form in the appropriate Tab of the EAP.

All items in the EAP should be thoroughly reviewed during training. Appropriate [Dam Owner] em-

ployees and EAP team members should attend a training session annually (or participate in a simulat-

ed drill).

TRAINING LOCATION:

DATE: TIME: INSTRUCTOR:

CLASS SIGN-IN:

Type of Simulation Conducted: Circle Emergency Type:

Emergency water release

Watch condition

Possible dam failure

Imminent dam failure

Actual dam failure

Comments, Results of Drill:

Revisions Needed to EAP Based on Results of Drill?

□ Yes □ No If yes, list revisions required:

Project ID Code KA06HH0058.0 Page B-6

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