under the environment effects act 1978 (vic) planning ...€¦ · new zealand 31 cee (2008) marine...

UNDER THE ENVIRONMENT EFFECTS ACT 1978 (VIC)

PLANNING & ENVIRONMENT ACT 1987 (VIC)PIPELINES ACT 2005 (VIC)

ENVIRONMENT PROTECTION ACT 1970 (VIC)ENVIRONMENT PROTECTION AND BIODIVERSITY CONSERVATION ACT 1999

(CTH)

GAS IMPORT JETTY AND PIPELINE PROJECT INQUIRY AND ADVISORY COMMITTEE

AGL Wholesale Gas Limited and APA

Transmission Pty Ltd

Direction 40: further instructions to Expert Witness - Andrew McCowan

Ashurst Level 26

181 William StMELBOURNE VIC 3000

T +61 3 9679 3000F +61 3 9679 3111

RWJ SCO 1000 000 480

From: Meg LeeSubject: Crib Point Queries [HW-Active.FID2613209]To: Dr. Andrew McCowanCc: Bianca McCormackSent: August 26, 2020 11:49 AM (UTC+10:00)

Dear Andrew You asked for information on how the gas pipeline crosses the desalination pipeline? APA has advised: The proposed pipeline will cross the desalination pipeline and associated infrastructure atkp41.215, approximately 12m north of Ballarto Road.The pipeline will be installed below the desalination pipeline with an HDD that also takes in ToomucCreek, Deep Creek and Ballarto Road. rgs Meg Lee | Partner

[email protected] | professional profile

www.hallandwilcox.com.au

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From: Bianca McCormackSubject: RE: Crib Point - further information [HW-Active.FID2613209]To: 'Dr. Andrew McCowan'Cc: Meg LeeBcc: '134395_0001 _ Crib Point gas _ Property EES'Sent: September 3, 2020 3:38 PM (UTC+10:00)

Hi Andrew With respect to your query regarding the minimum depth of cover at each of the waterway crossings, we have received theresponse below from APA:

For an open cut crossing the minimum DOC for each watercourse crossing is 2m at the invert. We are opencutting only 1 named watercourse Olivers Creek at ~KP10. Trenchless crossings always have a minimum of 2m at the invert also. In the case of HDD this is 10m+ at theinvert due to the required roping radius of the pipe. We have several drains at sealed road crossings with horizontalbores. These will have 2m doc at the invert.

Please let us know if this information is sufficient. We will otherwise write to you again soon regarding your remainingqueries. Regards Bianca McCormack | Senior Associate



From: Dr. Andrew McCowan < > Sent: Wednesday, 2 September 2020 7:07 PMTo: Bianca McCormack <[email protected]>Cc: Meg Lee <[email protected]>Subject: RE: Crib Point - further information [HW-Active.FID2613209] Hi Bianca, My apologies. I’m still not fully operational yet.The main things I was looking for were:

- Contour values to go with the contours shown on the Digital Terrain Model of the pipeline route (I can getthese from our own GIS specialists if necessary as they have access to all DELWP’s LiDAR survey).

- A profile of the ground surface elevations along the proposed pipeline route. Also, it would be useful to know the minimum depth of cover at each of the waterway crossings. Best regardsAndrew Dr. Andrew McCowanChairman | Senior Principal Engineer

From: Bianca McCormackSubject: RE: Crib Point Queries [HW-Active.FID2722664]To: 'Dr. Andrew McCowan'Cc: Meg LeeBcc: '134395_0005 _ Crib Point EES Emails'Sent: September 7, 2020 5:46 PM (UTC+10:00)Attached: GHD (2008)_ Impact Assessment for Surface Water, Hydrology and Waterway Crossings for the Transfer

Pipeline (Technical Appendix No. 63) (2).PDF

Hi Andrew Further to our emails below, attached is a copy of the GHD report you requested. Regards Bianca McCormack | Senior Associate

| professional profile


From: Bianca McCormack Sent: Thursday, 27 August 2020 9:56 AMTo: Meg Lee <[email protected]>; Dr. Andrew McCowan < >Subject: RE: Crib Point Queries [HW-Active.FID2613209] Hi Andrew and Meg Yes, I sent the Alluvium report yesterday, as an attachment. Another copy is attached. I will search for the desalination plantreport today, Regards Bianca McCormack | Senior Associate



From: Meg Lee <[email protected]> Sent: Thursday, 27 August 2020 9:16 AMTo: Dr. Andrew McCowan <Cc: Bianca McCormack <[email protected]>Subject: RE: Crib Point Queries [HW-Active.FID2613209] I think Bianca sent you the Alluvium report yesterday – in a link ? Bianca will see if we can track down the Desal one through our library. Meg Lee | Partner



From: Dr. Andrew McCowan < > Sent: Thursday, 27 August 2020 8:24 AMTo: Meg Lee <[email protected]>Cc: Bianca McCormack <[email protected]>Subject: RE: Crib Point Queries [HW-Active.FID2613209] Thanks Meg, I thought that must have been the case. I’ll look through the project description sections in a bit more detail. Any news of the Alluvium report? Also, could you see if it’s possible to get a copy of the desalination plant EES surface water report: GHD (2008): Impact Assessment for Surface Water, Hydrology and Waterway Crossings for the Transfer Pipeline(Technical Appendix No. 63) I think it may be available in electronic form from the State Library but I don’t have ready access to it. Heading out on site shortly. Best regardsAndrew Dr. Andrew McCowanChairman | Senior Principal Engineer

WATER TECHNOLOGY • +61 3 8526 0800 • www.watertech.com.au •

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From: Meg Lee <[email protected]> Sent: Wednesday, 26 August 2020 11:49 AMTo: Dr. Andrew McCowan <Cc: Bianca McCormack <[email protected]>Subject: Crib Point Queries [HW-Active.FID2613209] Dear Andrew You asked for information on how the gas pipeline crosses the desalination pipeline? APA has advised: The proposed pipeline will cross the desalination pipeline and associated infrastructure atkp41.215, approximately 12m north of Ballarto Road.The pipeline will be installed below the desalination pipeline with an HDD that also takes in ToomucCreek, Deep Creek and Ballarto Road. rgs Meg Lee | Partner



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Technical

AppendicesAppendix 63

Victorian Desalination Project Environment Effects Statement

A Victorian Government project

1 Table of Contents


Table of Contents – Technical Appendices

Technical Appendix Title

1 Department of Sustainability and Environment (2008) Community Consultation Plan, Department of Sustainability and Environment, Melbourne, Victoria

2 (2008) Legislation, Policy and Key Guidelines, Melbourne, Victoria

3 GHD (2008) Map Books – Transfer Pipeline, GHD, Melbourne, Victoria

4 GHD (2008) Map Books – Northerly Grid Connection, GHD, Melbourne, Victoria

5 GHD (2008) High Sensitivity Map Books – Whole of Project, GHD, Melbourne, Victoria

6 Maunsell Australia (2008) Risk Assessment Report, Maunsell Australia, Melbourne, Victoria

7 Maunsell Australia (2008) Greenhouse Gas Assessment Maunsell Australia, Melbourne, Victoria

8 Maunsell Australia (2008) Waste Management Assessment Report, Maunsell Australia, Melbourne, Victoria

9 GHD (2008) Proposed Gas Fired Powered Station Option Waste Management, GHD, Melbourne, Victoria

10 Essential Economics (2008) Existing Conditions Report (Economic), Essential Economics, Carlton, Victoria

11 Essential Economics (2008) Impact Assessment (Economic), Essential Economics, Carlton, Victoria

Table of Contents 2



12

Biosis Research Pty Ltd (2008) Addendum to Flora and Fauna Assessment: Desalination Plant, Wonthaggi, Victoria Existing Conditions and Impact Assessment Report, Flora and Fauna Assessment: Gas Fired Power Station for Desalination Plant, Biosis Research Pty Ltd, Port Melbourne, Victoria

13

Biosis Research Pty Ltd (2008) Assessment of marine mammals, birds and reptiles for the Desalination Project, Bass Coast, Victoria Existing Conditions and Impact Assessment Report, Biosis Research Pty Ltd, Port Melbourne, Victoria

14

Biosis Research Pty Ltd (2008) Flora and Fauna Assessment: Desalination Plant, Wonthaggi, Victoria Existing Conditions and Impact Assessment Report, Biosis Research Pty Ltd, Port Melbourne, Victoria

15

Biosis Research Pty Ltd (2008) Flora and Fauna Assessment: Desalination Project Transfer Pipeline corridor, Wonthaggi to Cranbourne, Victoria, Biosis Research Pty Ltd, Port Melbourne, Victoria

16

Biosis Research Pty Ltd (2008) Flora and Fauna Assessment: Desalination Project Northerly Grid Connection and Ancillary Power Infrastructure Existing Conditions and Impact Assessment, Biosis Research Pty Ltd, Port Melbourne, Victoria

17 Phillips Agribusiness (2008) Victorian Desalination Plant Agricultural Impact Assessment, Phillips Agribusiness, Geelong, Victoria

18 ASR (2008) Bass & Bays Hydrodynamic Model: Calibration and Validation, ASR, Raglan, New Zealand

3 Table of Contents



19 ASR (2008) Description of the Bass Straight Physical and Geological Marine Environment, ASR, Raglan, New Zealand

20 ASR (2008) Local Fine-Resolution Model: Calibration and Validation, ASR, Raglan, New Zealand

21 ASR (2008) South-East Australian (SEA) Hydrodynamic Model: Calibration and Validation, ASR, Raglan, New Zealand

22 Bassett (2008) Environmental Effects Statement Underwater Noise, Bassett, Melbourne Victoria

23 GHD (2008) Water & Sediment Quality Assessment, GHD, Melbourne, Victoria

24 Hydrobiology & CSIRO (2008) Toxicity Assessment for the Victorian Desalination Plant, Hydrobiology & CSIRO, Australia

25 ASR (2008) Extreme Water Levels at the Powlett River Mouth, ASR, Raglan, New Zealand

26 ASR (2008) Numerical Modelling of the Powlett River Freshwater Plume, ASR, Raglan, New Zealand

27 GHD (2008) Invasive Marine Species Specialist Report, GHD, Melbourne, Victoria

28

MAFFRI (2008) The horizontal and vertical distribution of fish eggs and larvae in relation to the proposed desalination plant for Victoria, September to December 2007, MAFFRI, Queenscliff, Victoria

29 ASR (2008) Mid-Field Numerical Modelling of the Desalination Plant Outlet Plume, ASR, Raglan, New Zealand

Table of Contents 4



30 ASR (2008) Near-Field Numerical Modelling of the Desalination Plant Outlet Plume, ASR, Raglan, New Zealand

31 CEE (2008) Marine Biology Existing Conditions and Impact Assessment, CEE, Richmond, Victoria

32 ASR (2008) Sediment concentrations in the water column near the intake – outlet, ASR, Raglan, New Zealand

33 ASR (2008) Particle Dispersal Modelling: Seasonal and Spatial Variations, ASR, Raglan, New Zealand

34 ERM (2008) The Desalination Plant Component Landscape & Visual Assessment, ERM, Richmond, Victoria

35

GHD (2008) Addendum to the Land Contamination Existing Conditions and Impact Assessment Report, Plant Site, GHD, Melbourne, Victoria

36 GHD (2008) Land Contamination Existing Conditions and Impact Assessment Report, Plant Site, GHD, Melbourne, Victoria

37

Rosengren. N, and Boyd. C (2008) Existing site conditions, Impacts and Risk Assessment GEOLOGY, GEOMORPHOLOGY and ACID SULPHATE SOILS, Rosengren. N, and Boyd. C, Bendigo, Victoria

38

Rosengren. N, and Boyd. C (2008) Gas fired Power Station Addendum, Specialist Study, Existing Conditions Report Geology and Geomorphology, Rosengren. N, and Boyd. C, Bendigo, Victoria

39

Rosengren. N, and Boyd. C (2008) Gas Fired Power Station IMPACT and RISK ASSESSMENT Geology, Geomorphology and Acid Sulphate soils, Rosengren. N, and Boyd. C, Bendigo, Victoria

5 Table of Contents



40 GHD (2008) Existing Conditions Report and Impact Assessment Groundwater, GHD, Melbourne, Victoria

41 GHD (2008) Gas Fired Power Station Option - Surface Water EES – Addendum to Plant Report, GHD, Melbourne, Victoria

42

GHD (2008) Addendum to Report for Melbourne Desalination Project, Surface Water EES – Plant, Waterways Assessment of Gas Supply Options, GHD, Melbourne, Victoria

43 GHD (2008) Surface Water EES - Plant, GHD, Melbourne, Victoria

44

Biosis Research Pty Ltd (2008) Addendum Report Gas-Fired Power Station – Cultural Heritage, Existing Conditions and Impact Assessment, Biosis Research Pty Ltd, Port Melbourne, Victoria

45

Biosis Research Pty Ltd (2008) Desalination Plant Component Cultural Heritage Existing Conditions and Impact Assessment Report, Biosis Research Pty Ltd, Port Melbourne, Victoria

46

GHD (2008) Addendum Report for Assessment of Impacts on Air Quality, Desalination Plant, Gas Fired Power Generation Options, GHD, Melbourne, Victoria

47 GHD (2008) Existing Conditions Report Air Quality Desalination Plant, GHD, Melbourne, Victoria

48 GHD (2008) Report for Assessment of Impacts on Air Quality, GHD, Melbourne, Victoria

49 GHD (2008) Impact Assessment Report - Noise and Vibration (Gas-Fired Power Station), GHD, Melbourne, Victoria

Table of Contents 6



50 GHD (2008) Report for Desalination Project Impact Assessment Report Noise and Vibration (Plant), GHD, Melbourne, Victoria

51 GHD (2008) Existing Traffic Conditions – Plant, GHD, Melbourne, Victoria

52

Maunsell Australia (2008) Traffic Impact Assessment Addendum Report – Gas Fired Power Station, Maunsell Australia, Melbourne, Victoria

53 Maunsell Australia (2008) Victorian Desalination Project Traffic Impact Assessment, Maunsell Australia, Melbourne, Victoria

54 GHD (2008) Report for Victorian Desalination Plant Preliminary Hazard Analysis, GHD, Melbourne, Victoria

55

Maunsell Australia (2008) Victorian Desalination Plant Environment Effects Statement, Social Impact Assessment Existing Conditions Report, Maunsell Australia, Melbourne, Victoria

56

Maunsell Australia (2008) Victorian Desalination Plant Environmental Effects Statement, Social Impact Assessment Report, Maunsell Australia, Melbourne, Victoria

57 GHD (2008) Services Impact Assessment Plant and Transfer Pipeline, GHD, Melbourne, Victoria

58

ERM (2008) The Desalination Project Water Transfer Pipeline Component Landscape & Visual Assessment For Department of Sustainability and Environment, ERM, Richmond, Victoria

59 GHD (2008) Land Contamination Existing Conditions and Impact Assessment Report, Transfer Pipeline, GHD, Melbourne, Victoria

7 Table of Contents



60

Rosengren. N, and Boyd. C (2008) TRANSFER PIPELINE Existing Conditions GEOLOGY GEOMORPHOLOGY ACID SULFATE SOILS, Rosengren. N, and Boyd. C, Bendigo, Victoria

61

Rosengren. N, and Boyd. C (2008) Transfer Pipeline IMPACT and RISK ASSESSMENT Geology, Geomorphology and Acid Sulfate Soils, Rosengren. N, and Boyd. C, Bendigo, Victoria

62 GHD (2008) Desalination Pipeline Corridor Final Impact Assessment Report - Groundwater, GHD, Melbourne, Victoria

63

GHD (2008) Final Impact Assessment for Surface Water, Hydrology and Waterway Crossings Assessment for the Transfer Pipeline, GHD, Melbourne, Victoria

64

Biosis Research Pty Ltd (2008) Water Transfer Pipeline Component, Cultural Heritage Existing Conditions Report and Impact Assessment, Biosis Research Pty Ltd, Port Melbourne, Victoria

65 GHD (2008) Report for Desalination Project Construction Dust Assessment – Transfer Pipeline, GHD, Melbourne, Victoria

66 GHD (2008) Impact Assessment Report – Noise and Vibration (Transfer Pipeline), GHD, Melbourne, Victoria

67 GHD (2008) Existing Traffic Conditions – Transfer Pipeline, GHD, Melbourne, Victoria

68

ERM (2008) Northerly Grid Connection and Ancillary Power Infrastructure Landscape and Visual Impact Assessment, ERM, Richmond, Victoria

Table of Contents 8



69

GHD (2008) Land Contamination Existing Conditions and Impact Assessment Report, Northerly Grid Connection and Ancillary Power Infrastructure, GHD, Melbourne, Victoria

70

Rosengren. N, and Boyd. C (2008) Northerly Grid Connection and Ancillary Power Infrastructure, Impact and Risk Assessment, Geology, Geomorphology & Acid Sulfate Soils, Rosengren. N, and Boyd. C, Bendigo, Victoria

71

Rosengren. N, and Boyd. C (2008) Northerly Grid Connection and Ancillary Power Infrastructure Specialist Study, Existing Conditions Report, Geology and Geomorphology, Rosengren. N, and Boyd. C, Bendigo, Victoria

72

GHD (2008) Gas Fired Power Plant Option Addendum to the Existing Conditions and Impact Assessment Report – Groundwater, GHD, Melbourne, Victoria

73

GHD (2008) Impact Assessment for Surface Water, Hydrology and Waterway Crossings for the Northerly Grid Connection and Ancillary Power Infrastructure, GHD, Melbourne, Victoria

74

GHD (2008) Northerly Grid Connection and Ancillary Power Infrastructure Existing Conditions and Impact Assessment Report – Groundwater, GHD, Melbourne, Victoria

75

Biosis Research Pty Ltd (2008) Northerly Grid Connection and Ancillary Power Infrastructure Component - Cultural Heritage Existing Conditions and Impact Assessment Report, Biosis Research Pty Ltd, Port Melbourne, Victoria

76 GHD (2008) Air Quality Impacts Assessment of the Northerly Grid Connection and Ancillary Power Infrastructure, GHD, Melbourne, Victoria

9 Table of Contents



77

GHD (2008) Impact Assessment Report – Noise and Vibration (Northerly Grid Connection and Ancillary Power Infrastructure), GHD, Melbourne, Victoria

78 GHD (2008) Existing Traffic Conditions – Northerly Grid Connection and Ancillary Power Infrastructure, GHD, Melbourne, Victoria

79 GHD (2008) Services Impact Assessment - Power Supply, GHD, Melbourne, Victoria

80

Maunsell Australia (2008) Northerly Grid Connection and Ancillary Power Infrastructure Electric and Magnetic Field Impact Assessment, Maunsell Australia, Melbourne, Victoria

81 Hydro Tasmania (2008) Electrical Network Connection Options, Hydro Tasmania Consulting, Melbourne Victoria

82 Biosis Research Pty Ltd (2008) Desalination Plant Component Cultural Heritage Management Plan, Biosis Research Pty Ltd, Port Melbourne, Victoria

83 Biosis Research Pty Ltd (2008) Transfer Pipeline Component: Cultural Heritage Management Plan, Biosis Research Pty Ltd, Port Melbourne, Victoria

84

Biosis Research Pty Ltd (2008) Northerly Grid Connection and Ancillary Power infrastructure Component: Cultural Heritage Management Plan, Biosis Research Pty Ltd, Port Melbourne, Victoria

Department of Sustainability and

Environment

Report for Desalination Project Final Impact Assessment for

Surface Water, Hydrology and Waterway Crossings for the

Transfer Pipeline

August 2008

Contents

1. Desalination Project Overview 1

1.1 Introduction 1

1.2 Limitations 2

1.3 Study Objectives 3

1.4 Background and Data Sources 3

2. Existing Conditions 5

2.1 Introduction 5

2.2 Catchment Characteristics 6

2.3 Water Quality Analysis 12

2.4 River Health 18

2.5 Waterway Characteristics 27

2.6 Hydrologic Assessment 36

3. Agency Requirements 44

3.1 Introduction 44

3.2 Catchment Management Authorities 44

3.3 Catchment Management Authority Requirements 44

4. Environmental Risk Assessment 49

4.1 Introduction 49

4.2 Desalination Project Risk 49

4.3 Detailed Waterway Risk Assessment 61

5. Impacts of Transfer Pipeline 66

5.1 Introduction 66

5.2 Available Construction Techniques 66

5.3 Potential Impacts 70

6. Risk Mitigation 73

6.2 Standard Management Measures 74

6.3 Construction Management Measures 75

6.4 Specific Mitigation Measures 76

6.5 Operational Management Measures 78

6.6 Application of Mitigation and Rehabilitation Measures 79

31/224461/ 3/147572 Desalination Project Final Impact Assessment for Surface Water, Hydrology and Waterway Crossings for the Transfer Pipeline

6.7 Implications of Risk Assessment for Construction Methodology at Waterway Crossings 81

6.8 Booster Pump Station Operation and Construction Mitigation 84

6.9 Performance Requirements 86

7. Conclusions 93

8. References 97

Table Index Table 1 Catchments and named waterways crossed by the

Proposed Transfer Pipeline Alignment 6Table 2 SEPP Water Quality Guidelines for Waters of

Western Port and catchment (Source Melbourne Water (2006)) 13

Table 3 SEPP Water Quality Guidelines for Waters of Western Port and catchment (Source: EPA Victoria (2003)) 14

Table 4 Summary of ISC Ratings for the Powlett River (Reaches 5 and 6) 19

Table 5 Summary of IRC Ratings for the Bass River 20Table 6 Summary of IRC Ratings for the Land Lang River 21Table 7 Summary of IRC Ratings for the Lower Bunyip

River 22Table 8 Summary of IRC Ratings for the Middle/ Upper

Bunyip River 23Table 9 Summary of IRC Ratings for Cardinia, Toomuc,

Deep and Ararat Creeks 24Table 10 Summary of IRC Ratings for Eumemmerring Creek 25Table 11 Summary table of the distribution of waterway types

along the alignment 30Table 12 Terrain units of Transfer Pipeline corridor

(Rosengren, 2008) 36Table 13 Review of Streamflow Data 38Table 14 Preliminary flood frequency analysis of stream

gauging stations translated to river crossings (ML/day) 42

Table 15 Summary of Sustainable Diversion Limits 43Table 16 Consequence rankings 51Table 17 Likelihood Rankings 53


Table 18 Risk Assessment Matrix 54Table 19 Construction Phase Impacts 55Table 20 Operation Phase Impacts 57Table 21 Likelihood Rankings 64Table 22 Waterway crossings where pipe jacking should be

considered# 82Table 23 86

Figure Index Figure 1-1 Waterway crossings along Proposed Transfer

Pipeline (Rev E) 4Figure 2-2 Water Quality Monitoring Sites 16Figure 2-3 River Health of the waterways along the Proposed

Transfer Pipeline 26Figure 2-4 Terrain Units of the Transfer Pipeline corridor. See

Table 1 for details (Rosengren, 2008) 35Figure 2-5 Waterways stream gauge information 37Figure 2-6 Monthly Streamflows Cardina Creek at Cardina 39Figure 2-7 Monthly Streamflows Bunyip River at Iona 39Figure 2-8 Monthly Streamflows Toomuc Creek at Pakenham 40Figure 2-9 Monthly Streamflows Bass River at Glen Forbes

South 41Figure 5-1 Standard Trenching Pipeline Construction 68Figure 5-2 Standard trenching construction with flow diversion

in place 69

AppendicesA Pipeline Waterway Map Series (30 pages)B Water Quality Assessment for the Proposed Transfer PipelineC SEPP Assessment of the Transfer Pipeline AlignmentD Waterway Crossing ProformasE Waterway Crossing Risk Assessment


1. Desalination Project Overview

1.1 Introduction The Victorian Government proposes to construct a seawater desalination plant on the Bass Coast, three kilometres west of Wonthaggi. The plant and ancillary infrastructure would supply water to the Melbourne Water supply system and other regional supply systems. The Victorian Government has announced that the Victorian Desalination Project will be delivered as a Public Private Partnership (PPP) under the Partnerships Victoria Policy, and will be operational by 2011.

The Victorian Desalination Project has four components:

�� Marine Structures consisting of the seawater intake and the saline concentrate outlet structures;

�� Desalination Plant with reverse osmosis desalination technology;

�� Transfer Pipeline (approximately 85 kilometres) connecting the Desalination Plant to the Melbourne water supply network; and

�� Power Supply to the Desalination Plant, Transfer Pipeline and ancillary infrastructure.

The Minister for Planning has decided that an Environment Effects Statement (EES) is required for the Project.

The Project Description and subject matter of the EES are:

�� The Performance Requirements;

�� The Reference Project; and

�� Variations.

Performance Requirements govern the Project for EES purposes, and will be the basis of any Contract with the Project Company. These set the environmental parameters for the Project.

The Reference Project is an integrated response to the Performance Requirements developed by the State. It is used in the EES to demonstrate the Project’s feasibility and ability to achieve acceptable environmental outcomes.

Variations contemplate other design and management solutions which also meet the Performance Requirements and are within the scope of the EES assessment.

This study establishes the existing conditions of the Project area and where specific potential impacts or interactions with the environment are identified provides suggested management recommendations to mitigate the potential impacts that relate to the Reference Project primarily.


1.2 Limitations This report has been prepared based on the following information and assumptions:

The Transfer Pipeline easement will cross 100 designated waterways. At the time of submission of this report, 70 of these waterway crossings have been assessed during the field assessment. Field investigations and analysis will continue to inform this assessment and will be documented in future revisions of this report.

It is considered unlikely that this additional field investigation will result in significant changes to the current risk ratings as the majority of sites that are attributed medium or greater risks are based upon issues such as proximity to RAMSAR sites, and flooding characteristics. Where risks are medium or greater pipe jacking, additional controls or alternative alignments have been recommended.

�� Assumptions have been made for waterways that have not yet been visited regarding waterway types, conditions and potential issues based upon aerial investigation;

�� This report does not include analysis completed by other disciplines important to this study, such as aquatic ecology, geotechnical investigation, geological investigation and geomorphological investigation and may be incorporated as investigations are completed;

�� Risk assessment was undertaken based upon the assumptions that appropriate controls, i.e. mitigation measures, will be implemented;

�� The outcomes from the risk assessment process are preliminary in nature and may evolve over time as further investigation is undertaken;

�� This report has been prepared solely for the Client (Department of Sustainability and Environment);

�� The report is based on work carried out in accordance with the specific Project scope as agreed between GHD Pty Ltd and the Client;

�� The results of this investigation should not be used for any other purpose than that for which it is specifically intended;

�� The results of this investigation are to be used by the Client only and must not be used by any other party; and

�� This report may contain certain assumptions upon which preliminary findings are based. These may change as more information becomes available and as fieldwork is undertaken.

There are a number of assumptions made in regard to these investigations:

�� Geomorphology interpretations are either based on desktop information and/or a single site visit along the Transfer Pipeline alignment where the alignment was either viewed from roads ways and therefore restricted, or at the Transfer Pipeline crossing point;

�� Geomorphology/hydrology interpretations are based on desktop information and a preliminary assessment of the Transfer Pipeline alignment at the time of the submission of this report; and


�� An initial discussion has been undertaken with MWC and the WGCMA, but none with other stakeholders.

1.3 Study Objectives The objectives of the existing conditions study were to:

�� Describe existing conditions of waterways, floodplains and significant drainage paths in the vicinity of the preferred Transfer Pipeline alignment and relevant alternatives, in relation to their hydrology, water quality and character;

�� Assess risks of erosion, soil degradation and sedimentation associated with construction of the Transfer Pipeline along the preferred and any proposed control measures;

�� Assess the potential for adverse effects of Transfer Pipeline construction on the hydrology, water quality and character of local waterways, floodplains and drainage paths, including in relation to floodway function;

�� Detail the proposed measures, including the choice of alignment and construction technique as well as the management and timing of works, to minimise adverse effects of Transfer Pipeline construction on the functions and values of waterways, floodplains and drainage paths; and

�� Describe proposed measures to rehabilitate affected sections of waterways, floodplains and drainage paths following Transfer Pipeline construction works.

Additional broader objectives of this study were to:

�� Provide information to support preparation of the Desalination Environmental Effects Statement; and

�� Identify authority requirements and timings with a view to obtaining in principle agreements, permits and approvals that are on the critical path.

This report aims to address the study objectives listed above, however not all were addressed at submission of this report.

1.4 Background and Data Sources This report is separate to the assessments of the powerline transmission corridor of the Desalination Plant and the assessments of the location of the Desalination Plant.

The information contained herein is based upon the Transfer Pipeline alignment Rev E and the “Pipeline Alignment Buffer 400 m” (refer Appendix A and Figure 1-1).


DRAFTW e s t e r n P o r t B a y

PORT PHILLIP

WEST GIPPSLAND

PORT PHILLIP

PORT PHILLIP BASS RIVER

POW

LETT

RIV

ER

BUNYIP RIVER MAIN DRAIN

FOSTER C

REE

K

ADAM

S CR

EE KCREEK 2504

LITTLE LANG LANG RIVER

PHEASAN

T CR

EEK

CARDINIA DRAIN

MUSK CREEK

W

EST

CREE

K

NORTH WEST CATCH DRAIN

LOW

ER T

OO

MU

C C

RE

EK

NO. 6 YALLOCK DRAIN

YALL OCK CREEK

LANG LANG RIVE R (MIDDLE)

ALLSOP CREEK

LOW

ER

D

EEP CREEK DRAIN

WATTLE CREEK

YALLOCK OUTFALL D

RAIN

LO

WER LANG LANG RIV

ER

SOUTH E

AST CATC

HMENT D

RAIN

RED BLUFF CREEK

OLD LANG LANG RIVER

CREEK 3831

MCD

ON

ALD

S C

ATC

H D

RA

IN

CREEK 3851

TEA TREE CREEK

MU

DD

Y G

ATE

S D

RA

IN

LITTLE YANNAT HAN RD DR (2941)

TOO

RA

DIN

RD

DR

AIN

CHRISTIES DRA

IN

MONOMEITH DRAIN

NUMBER SEVEN YALLOCK DRAIN

CR

EEK 3854

ARARAT C

REEK

GRIFFITHS DRAIN MURRAY ROAD DRAIN

GREAVES DRAIN

CLY

DE

CREEK

WO

OLSH

ED C

REEK

AR

CH

IE

S CREEK WEST B

PARISH RD DRAIN

MACKEYS D

RA

IN

HEIFER CREEK

BRIDG

E C

RE

EK

KING PARROT CREEK

SEV

EN M

ILE

DR

AIN

CREEK 3847

FIVE

MIL

E D

RAI

N

LYES DRAIN

SOUTHERN BOUNDARY DRAIN

WES

T D

ALM

OR

E R

D D

RAI

N

GORGE CREEK

CREEK 3836

TENNENT CREEK

ARCH

IES

CR

EEK EAST B

EIG

HT

MIL

E D

RAI

N

YALL

OCK CUT &

LEVEE

CREEK 3839

NORTHERN BOUNDARY DRAIN

TELFER CREEK

LANCE CREEK

CREEK 3853

LITTLE LANG LANG RIVER STH

THOM

PSONS DRAIN

HO

LTS

DR

AIN

WYL

IES

DRAIN MAIN BRANCH

C REEK 3841

MC

GR

EG

OR

S D

RA

IN

NO.5 YALLO CK DRAIN

MO

UNT A

RARAT D

RA

IN

PEACOCK ROAD DRAIN

GU

NN

S D

RA

IN

LAN

GW

ARR

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G:\31\22421\CADD\GIS\Projects\PE13-Hydrology and Hydraulics\MXD files\006_A3_Overview_WWay_Croasing21_PipeD.mxd

1:175,0000 2 4 6 81

Kilometres (at A3)

Map Projection: Transverse MercatorHorizontal Datum: Geocentric Datum of Australia 1994

Grid: Map Grid of Australia, Zone 55

T F E W© 2007. While GHD has taken care to ensure the accuracy of this product, GHD (LEGAL ENTITY) and DATA CUSTODIAN(S), make no representations or warranties about its accuracy, completeness or suitability for any particular purpose. GHD and DATA CUSTODIAN cannot accept liability of any kind (whether in contract, tort or otherwise) for any expenses, losses, damages and/or costs (including indirect or consequential damage) which are or may be incurred as a result of the product being inaccurate, incomplete or unsuitable in any way and for any reason.

Dept of Sustainability and EnvironmentThe Desalination Project

Figure 1-1

Job NumberRevision A

31-22421

15 May 2008

Waterway crossing along proposed Transfer Pipeline (Rev E)

Date

Data source: DSE; VicMap; GHD. Created by: Khan Kamruzzaman

180 Lonsdale Street Melbourne VIC 3000 Australia 61 3 8687 8000 61 3 8687 8111 [email protected] www.ghd.com.au

LegendWaterway Crossing

Major Town

Major Roads

Section Breakl

Watercourse Major

Watercourse Minor

Current Transfer Pipe Alignment (30m)Current Pipeline Corridor (400m)

Levee and Embankment

Desalination Plant Boundary

Parcel

CMA Boundary

2. Existing Conditions

2.1 Introduction The primary purpose of this section is to fulfil the requirements outlined within the following objective:

�� Describe existing conditions of waterways, floodplains and significant drainage paths in the vicinity of the preferred Transfer Pipeline alignment and relevant alternatives, in relation to their hydrology, water quality and character.

Project Step: Relevant Report Section(s):

Comments:

Section 2.2: Catchment Overview

This describes the catchments likely to be affected by the Transfer Pipeline alignment and assists with defining the study area for the purposes of this report.

Section 2.3: Water Quality

This section uses relevant water quality monitoring data to discuss the current water quality of the major waterways likely to be affected by the Transfer Pipeline alignment.

Section 2.4: River Health

This section discusses available data that characterises the health of waterways crossed by the Proposed Transfer Pipeline Alignment. It provides a discussion of the regional catchment strategies and the flora and fauna characteristics of the main waterways crossed by the p Transfer Pipeline alignment.

Section 2.4: Waterway condition

This section discusses the method used to characterise the current conditions of the waterways at the waterway crossing locations for the Transfer Pipeline alignment and summarises the waterway types.

Existing Condition

Section 2.5: Hydrology This section uses relevant hydrological monitoring stations to discuss the hydrologic conditions of the major waterways likely to be affected by the Transfer Pipeline alignment.


2.2 Catchment Characteristics

2.2.1 Catchment Overview

The Proposed Transfer Pipeline alignment crosses through seven main catchments and will cross 100 waterways, of which 17 are named waterways and eight are named drains (Table 1). Aerial maps have been overlaid with the defined Melbourne Water waterways and Vic Maps waterways to assist with identifying the location of waterways potentially affected by the Proposed Transfer Pipeline alignment (Appendix A). The waterways defined by Melbourne Water (MWC) and West Gippsland Catchment Management Authority (WGCMA) form the basis of investigation within this report.

Table 1 Catchments and named waterways crossed by the Proposed Transfer Pipeline Alignment

Powlett River Catchment

�� Powlett River

�� Bridge Creek

�� Woolshed Creek

Bass River Catchment

�� Bass River

�� Tennent Creek

�� Gorge Creek

South Gippsland Coastal Rivers and Creeks

�� Peacock Road Drain

Lang Lang River Catchment

�� Lang Lang River

�� Adams Creek

�� Monomeith Drain

�� Red Bluff Creek

Bunyip River Catchment

�� Bunyip River

�� Southern Boundary Drain

�� South East Catchment Drain

�� North West Catchment Drain

�� Himbeck’s Drain

�� Gray’s Drain

�� Yallock Creek

Toomuc Creek Catchment

�� Toomuc Creek

�� Cardinia Creek

�� Deep Creek

�� McDonald’s Catchment Drain

�� McGregor’s Drain

�� Gum Scrub Creek

Dandenong Catchment �� Ti-Tree Creek


Powlett River Catchment

The Powlett River originates upstream of Outtrim, over 30 km upstream of the river mouth. During the mid-Holocene period the Powlett River received a large volume of in-stream channel sediment from the major tributaries. This channel impedance has allowed for the development of natural levee banks. The Powlett River is weakly incised into the alluvium valley deposits covering the floodplain (Rosengren, 2008).

Past and on-going human activities have substantially altered the fluvial geomorphology of the Powlett River, with most of the catchment cleared for agriculture. The West Gippsland Catchment Management Authority has documented the changes imposed on the channel and floodplain reaches (2007). These include channel straightening, realignment, swamp drainage, flood cuts, levee bank construction, bank stabilisation, and desnagging (Rosengren, 2008).

Bass River Catchment The Bass River Catchment is approximately 266 km2 (Wallbrink et al., 2003). It originates just south of Poowong where landuse is dominated by dairy farming. From this point it flows south-west past Loch and Glen Forbes and into the south-eastern portion of Western Port Bay near San Remo. Bass River catchment has been subject to large-scale vegetation clearance throughout European development. This has resulted in altered hydrological and morphological processes, which are, at least in part, responsible for channel incision. Throughout much of the Bass River main trunk the channel is disconnected from the floodplain due to its depth below current floodplain levels and its protection by terrace features, which are evidence of former channel levels.

Willows are common throughout the catchment and it is thought that these have been planted in response to the wide-spread channel incision that occurred post-European settlement (Earth Tech, 2008). Willows are currently acting as bed control structures (i.e. they stabilise the channel) throughout much of the catchment. Melbourne Water is currently implementing a willow control plan.

South Gippsland Coastal Rivers and Creeks Melbourne Water Corporation has defined surface water catchments for Sustainable Diversion Limits (SDL) around a number of waterways within the South Gippsland Basin. This study has employed these surface water catchments for the Bass, Powlett and other rivers when categorising waterway crossings for the transfer pipeline. Two regions crossed by the transfer pipeline within the South Gippsland Basin, remain undefined by SDL surface water catchments and as such are classified as South Gippsland Coastal Rivers and Creeks.

The larger, and most northerly of these South Gippsland Coastal Rivers and Creeks catchments, is approximately 133 km2 and is bounded by the Bass SDL catchment in the south and east, Western Port in the west and the Lang Lang SDL catchment in the north. This catchment drains to Western Port.


The smallest and most southerly of these regions covers approximately 39 km2 and stretches between San Remo in the west almost to the Powlett River in the east. To the north a line of hills that represent the southern extent of the Bass SDL catchment bound the area. This catchment drains to Bass Strait.

Lang Lang River Catchment The Lang Lang River originates in an area dominated by dairy farming within the foothills of Poowong East. It flows north to Athlone and then west towards the South Gippsland Highway before entering into the north of Western Port Bay. The channel has been artificially straightened downstream of the South Gippsland Highway.

Bunyip River Catchment The Bunyip River originates in the Bunyip State Forest in the north-eastern portion of the Western Port catchment. The Bunyip flows south to the confluence with Tarago River near Longwarry North. It then flows south-west to Bunyip and through the Koo Wee Rup swamp where it has been channelised by past landuse activities. Constructed levee banks are common throughout this portion of the channel and are important in protecting the surrounding land from flooding.

Toomuc Creek Catchment �� Toomuc Creek

Toomuc Creek originates in the Upper Beaconsfield hills and flows through farms within Toomuc Valley and the township of Pakenham. Water then flows through a constructed channel across the Koo Wee Rup swamplands and then out into Western Port Bay. Much of the indigenous riparian vegetation has been removed and has been replaced in some places with introduced eucalypts (Cardinia Shire Council, 2007). In more recent years there has been a significant increase in urbanisation within the catchment.


Cardinia creek is one of the waterways draining the northern part of the Toomuc Creek catchment. This creek comes together as parallel channels alongside Deep and Toomuc Creeks within the Koo –Wee Rup swampland (EPA, 1998) which then discharge to Western Port Bay at Moody’s Inlet.

�� Deep Creek

Deep creek is one of the waterways draining the northern part of the Toomuc Creek catchment. This creek comes together as parallel channels alongside Cardinia and Toomuc Creeks within the Koo-Wee-Rup swampland that then discharges to the bay at Moody’s Inlet (EPA 1998).


Dandenong Catchment �� Dandenong Creek

The Dandenong Catchment lies south-east of Melbourne and has a catchment area of 855 km2. Dandenong Creek originates in the Dandenong Ranges National Park and flows into both Mordialloc Creek and Patterson River prior to discharging to Port Phillip Bay (Melbourne Water, 2006a).

�� Eumemmerring and Ti Tree Creeks

Eumemmerring Creek is one of the major tributaries to Dandenong Creek. Ti Tree Creek, which is a small tributary to Eumemmerring Creek, is the only named waterway to be crossed by the Transfer Pipeline Alignment in the Dandenong Catchment.

Eumemmerring Creek is a rural-urban catchment where rapid development is taking place. The creek has been heavily modified in its middle sections to provide flood protection in once extensive wetland areas, as have its upstream tributaries the Hallam Main Drain and Narre Warren and Troups Creeks (Melbourne Water Website 2008b). Stream works are being undertaken to re-establish a more natural channel shape within the creek alignment from South Gippsland Highway to Abbots Road in Hampton Park.

Receiving Waters The catchments discussed above drain to three primary receiving waters, which include Western Port, Port Phillip Bay and Bass Strait.

�� Western Port Catchment

The Western Port catchment drains an area of 3,200 square kilometres and is largely characterised by its productive farmland and extensive coastline (EPA 1998). A total of 38 streams contribute approximately 1 100 ML of water to Western Port every day (EPA 1998). Bunyip River, Lang Lang River and Bass River contribute around 75% of the freshwater discharging to the bay each day (EPA 1998). Since European settlement large scale clearance, drainage of the Koo Wee Rup swamp and the construction of channelised drains has greatly altered the landscape within this area. These changes have lead to increased catchment erosion and increased sediment transport efficiency (EPA 1998). A combination of agricultural land use practices and erosion within the catchment will have altered the water quality within this region.

Many of the Western Port Catchments crossed by the Transfer Pipeline alignment flow into the Western Port Ramsar Wetlands. The Western Port Ramsar site is a large bay connected to Bass Strait by a wide channel between Flinders and Phillip Island and a narrow channel between San Remo and Phillip Island. French Island lies in the middle of Western Port. Western Port is located where the tidal range reaches a maximum on the Victorian Coast (up to 3 metres) and is characterised by a wide variety of marine habitats ranging from deep channels to extensive sea grass flats, mangroves, saltmarsh and wide tidal mudflats. The Western Port Ramsar site has four marine and coastal wetland types recognised under the classification system used by the Ramsar Convention (DSE, 2003). These are:


�� Marine sub-tidal aquatic beds;

�� Intertidal mud and sand flats;

�� Intertidal marshes (including saltmarsh); and

�� Intertidal forested wetlands (including mangroves).

This wetland is an internationally significant wetland because it has an unusually wide variety of habitat types, including White Mangrove, which fringes 40% of the coastline and seagrass beds, which cover 38% of the site. Salt marshes occupy less than 10% of the coastline yet are an important part of the vegetation in this region. They extend a kilometre or more from the shoreline in many places, are floristically rich and relatively undisturbed. The Western Port Ramsar site provides a range of important functions that contribute to the maintenance of the wetland and surrounding ecosystems (DSE, 2003).

Sediment and nutrient loads entering the system from surrounding catchments can have severe impacts on the health of the RAMSAR wetlands.

Catchments crossed by the Transfer Pipeline that drain to Western Port include Bass Catchment, Lang Lang Catchment, Bunyip Catchment, Toomuc Catchment and the northern most South Gippsland Coastal Rivers and Creeks Catchment.

�� Port Phillip Bay

Port Phillip is a large, shallow marine bay that is of immense social, economic and environmental value to Victoria. The Port Phillip catchment is Australia’s most densely populated and drains an area of approximately 9 790 square kilometres. There are eight major creeks and rivers flowing into to the Bay and about 5 000 underground drains collecting runoff from the greater Melbourne area. These drains discharge either to creeks and rivers or directly through more than 300 outlets into the Bay (CSIRO, 2003).

The Yarra River is the largest single source of inflows to the Bay, due to its large catchment (4 000 square kilometres), of which 55% is subject to urban or agricultural development. The second largest input volume is contributed by the treated effluent from the Western Treatment Plant at Werribee (CSIRO, 1996).

Increased loads of nutrients, notably nitrogen, from the surrounding catchments are recognised as one of the major threats to the health of the Bay (EPA, 2002). Exotic marine pests also present a critical risk to the Bay, potentially affecting the biodiversity of the Bay and the ecological processes that sustain it.

A single waterway crossed by the Transfer Pipeline drains into Port Phillip Bay; namely Ti-Tree Creek. Several unnamed watercourses draining to Ti-Tree Creek are also crossed by the transfer pipeline.


�� Bass Strait

Bass Strait is a shallow continental shelf separating Tasmania from southern Victoria, and connecting the south-east Indian Ocean with the Tasman Sea. The region supports a diversion marine ecosystem with a wide range of habitats. The submerged temperate rocky reef and canyons contain high species biodiversity with a large proportion being endemic to the area (Sandery, 2005). This is largely due to the fact that the area has been isolated in geological time and by climatic barriers, with a history of variable exposure and immersion during sea-level changes in the last few million years (Esso, 2004).

Bass Strait is a high-energy environment exposed to frequent storms and significant wave heights. Waters of Bass Strait are generally well mixed but surface warming sometimes causes weak stratification in calm summer conditions (Esso, 2004).

Marine activities of environmental significant include fisheries, shipping and coastal riverine discharges. Production from the Bass Strait oil and gas fields first commenced in 1969. Operations include exploration and production of crude oil, liquids and gas.

Waterways crossed by the Transfer Pipeline that drain to Bass Strait include the Powlett River, Bridge Creek, Woolshed Creek and the southern South Gippsland Coastal Rivers and Creeks catchment.

2.2.2 Floodplains within the Transfer Pipeline corridor

The Transfer Pipeline alignment is within the low-lying elevation Eastern Plains that consists of flat or gently undulating surfaces. The plains include the broad lowlands of the drained Koo Wee Rup swamp, the Bass River and Powlett floodplains.

Floodplains are the low-lying areas adjacent to rivers, creeks or drainage channels and can be inundated following heavy rainfall in the catchment. Many of the waterways within the Transfer Pipeline corridor are protected by levees within the Koo Wee Rup swamp area which act to reduce the impact of floods to these areas. . The waterways that intercept the Transfer Pipeline that have constructed levees are:

�� Bunyip Main Drain;

�� Yallock Outfall;

�� Yallock Cut and Levee;

�� Deep Creek Catch Drain;

�� Lower Toomuc Creek; and

�� Cardinia Catch Drain.

These are predominantly located within the Koo Wee Rup Flood Protection District (KWRFPD). The KWRFPD lies between the Tyabb and Heath Hill Faults with an area of approximately 400 km2 and includes the Cardinia Creek, Bunyip River and Lang Lang River catchment systems. This is one of Victoria’s richest agricultural areas and was the main swamp around Western Port.


Historically channels were formed to drain the swamp to allow the land to be used for agricultural activities. Over time many of the channels have incised and are now significant features along the Koo Wee Rup Plains. There are a network of drains throughout the district, that vary in terms of level of flood protection depending on the incision of the channel and presence of levees. Two of the main carrier drains include the Cardinia Outfall Drain and the Bunyip Main Drain. On some of the smaller waterways without formal levees, a relatively minor rainfall event can inundate large areas within the district due to the extremely flat nature of the district.

2.3 Water Quality Analysis This section provides an analysis of the available long-term water quality monitoring results for the relevant waterways affected by the Transfer Pipeline alignment. The water quality data has been assessed to determine the current base line conditions of the waterways and provides a general snapshot across the waterways compared to water quality guidelines.

For comparative purposes the monitoring results for each site are presented in tabular form within Appendix B. Limited spatial and temporal analysis was possible due to the small number of sampling points for each waterway. However, this data set provides an initial indication of the existing condition of the waterways of interest.

It is not relevant to base an assessment of water quality on a single data point as water quality can be highly variable over time due to a range of different environmental events. Instead, it is most relevant to base an assessment of the current understanding of the waterway on a number of sample points. Existing water quality information collected over longer than current project timeframes have been used to provide a snapshot of the current condition of waterways. As a result, this assessment has been restricted to existing data locations that in some cases may be some distance from the Transfer Pipeline alignment. Long-term water quality data is not available for all of the waterways crossed by the Transfer Pipeline, however data does exist for many of the major named waterways.

2.3.1 State Environment Protection Policy Water Quality Guidelines

The State Environment Protection Policy (Waters of Victoria) (SEPP) aims to provide a coordinated approach for the protection and, where necessary, rehabilitation of the health of Victoria’s water environments. The SEPP identifies ‘beneficial uses’ of waterways and establishes environmental quality objectives at levels that will ensure the protection of these uses. SEPPs are legally enforceable statutory instruments and provide the cornerstone for a wide range of environmental protection and management activities in Victoria.

Construction activities associated with waterway crossings, will need to be managed to minimise land disturbance, soil erosion and the discharge of sediments and other pollutants to surface waters and will be required to demonstrate compliance with relevant SEPP requirements.


The Proposed Transfer Pipeline Alignment will cross waterways which fall within the following SEPP components:

�� State Environmental Protection Policy (Waters of Victoria) – general document;

�� ‘Insertion Schedule F8 – Waters of Western Port Bay and Catchment‘ – addition to overall SEPP;

�� ‘Insertion Schedule F6 – Waters of Port Phillip Bay’ - addition to overall SEPP; and

�� ‘Policy Area No. W-28A (Waters of the Dandenong Valley)’ – an additional component of Schedule F6.

These documents outline the relevant water quality guidelines specific to each waterway potentially affected by the Transfer Pipeline alignment. The appropriate guidelines for each specific waterway crossed by the Transfer Alignment are outlined within Appendix C. In addition, this appendix outlines the segments of the environment relevant to each individual waterway crossed and the associated beneficial uses.

SEPP guidelines provide a basis with which to compare water quality results to determine whether they meet environment protection guidelines. The SEPP guidelines presented in Table 2 and Table 3 provide the relevant water quality guidelines for the waters of the Western Port Catchment. These are the most relevant guidelines to the alignment waterway crossings.

For turbidity and suspended solids (SS) the median value is used for comparison. For total nitrogen (TN), total phosphorous (TP), lead (Pb) and zinc (Zn) the maximum measured value is used as the water quality parameter indicator. Further, the E.Colicount per 100 mL geometric mean (geomean) is used for the microbial water quality guideline.

Table 2 SEPP Water Quality Guidelines for Waters of Western Port and catchment (Source Melbourne Water (2006))

SEPPTurbidityNTUMedian

SSmg/LMedian

TNmg/LMax

TPmg/LMax

E. coliorg/100mLGeomean

Pbmg/LMax

Znmg/LMax

Waters of Western Port and catchment

South Eastern Rural and Lowlands Philip Island

<15 <20 <0.6 <0.05 <200 <0.01 <0.005

Northern Hills <5.0 <5 <0.2 <0.03 <200 <0.01 <0.005


Table 3 SEPP Water Quality Guidelines for Waters of Western Port and catchment (Source: EPA Victoria (2003))

SEPPDO (%)

25th Percentile / Max

EC

75th

Percentile

pH

25th/75th

Percentiles

Waters of Western Port and catchment

Lowland reaches in the Western Port Catchment 85/110 500 6.4/7.7

The appropriate guidelines for each specific waterway crossed by the Proposed Transfer Alignment are outlined within Appendix C. In addition, this appendix outlines the segments of the environment relevant to each individual waterway crossed and the associated beneficial uses.

2.3.2 Water Quality Indicators

Water quality indicators provide an assessment of the quality of water at a particular time and at a particular location. The following relevant parameters were compared with SEPP guidelines for the purposes of this assessment:

�� Turbidity;

�� Suspended Solids (SS);

�� Escherichia Coli (E.Coli);

�� Nutrients (Total nitrogen (TN) and Total Phosphorus (TP);

�� Lead (Pb);

�� Zinc (Zn);

�� Electrical Conductivity (EC);

�� pH; and

�� Dissolved oxygen (DO).

Appendix B provides a description of the key water quality indicators which have been used to assess current water quality condition in relation to SEPP water quality guidelines.

2.3.3 Data Availability

Melbourne Water and the Victorian Water Resources Data Warehouse (VWR) hold water quality data for many of the relevant catchments crossed by the Proposed Transfer Pipeline Alignment. This data has provided the basis for the existing conditions assessment, however it is not intended that this assessment be used to define baseline levels. Further investigation will be required prior to construction to establish relevant baseline levels in accordance with SEPP and appropriate performance requirements.


�� Melbourne Water Long Term Water Quality Monitoring

Melbourne Water’s Waterway Water Quality Monitoring Network consists of 73 sites throughout Greater Melbourne (Melbourne Water 2007a). It is a long-term program where sites are sampled monthly. The following Melbourne Water water quality sample sites have been assessed:

– Bunyip River at North Labertouche Road, Labertouche;

– Bunyip River downstream Cannibal Creek, Longwarry North;

– Bunyip Main Drain at Little Road, Iona;

– Bunyip River at Healesville Koo-Wee-Rup Road Koo-Wee-Rup;

– Cardinia Creek at Chadwick Road, Upper Beaconsfield;

– Cardinia Creek at Ballarto Road, Cardinia;

– Deep Creek at Ballarto Road, Rythdale;

– Lang Lang River at Drouin-Poowong Road, Athlone;

– Lang Lang River at South Gippsland Highway, Lang Lang;

– Toomuc Creek at Princes Highway, Pakenham;

– Toomuc Creek at Ballarto Road, Rythdale; and

– Eumemmerring Creek at Worsley Road, Dandenong.

�� Victorian Water Resources Data Warehouse

The Victorian Water Resources Data Warehouse (VWR) is a Department of Sustainability and Environment (DSE) website (DSE, 2008a) that provides access to information on Victoria’s water resources. The site provides both raw and summary data on both water quality and quantity. For the purpose of this investigation if has been used to access water quality summaries for waterways of interest not covered by the Melbourne Water Long Term Monitoring data set.

Specifically, summaries of the Bass and Powlett River water quality sampling for 2007 have been used. These sites are as follows:

– Bass River at Glen Forbes South;

– Powlett River, downstream Foster Creek Junction; and

– Powlett River, downstream Wonthaggi.

Figure 2-2 presents the locations of the water quality monitoring sites used for this analysis.


DRAFT

WPBUN0707at Little Road, Iona

227254POWLETT RIVER D/S WONTHAGGI

DAEUM0247at Worsley Road, Dandenong

WPDEE0082at Ballarto Road, Rythdale

WPCAR0133at Ballarto Road, Cardinia

227231BASS RIVER @ GLEN FORBES SOUTH

WPTOO0041at Princes Highway, Pakenham

WPLAN0164at Drouin-Poowong Road, Athlone

WPCAR0056at Chadwick Road, Upper Beaconsfield

WPLAN0373at South Gippsland Highway, Lang Lang

WPBUN0130at North Labertouche Road, Labertouche

WPBUN0371downstream Cannibal Creek,

Longwarry North

WPBUN0720at Healesville Koo-Wee-Rup Road,

Koo-Wee-Rup

227236POWLETT RIVER @ D/S FOSTER

CREEK JUNCTION

PORT PHILLIP

WEST GIPPSLAND

PORT PHILLIP

PORT PHILLIP

BUNYIP RIVER

BASS RIVER

CARDINIA CREEK

TOO

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K

LANG LANG RIVER

ARARAT CREEK

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BASS HIGHWAY

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COWES

TYABB

NYORA

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BUNYIP

TYNONG

SOMERS

POOWONG

OFFICER

PAKENHAM

GARFIELD

TOORADIN

SAN REMO

NEWHAVEN

HASTINGS

LONGWARRY

CORINELLA

LANG LANG

CRIB POINT

GRANTVILLE

SOMERVILLE

PEARCEDALE

CRANBOURNE

CORONET BAY

KOO-WEE-RUP

CARRUM DOWNS

NARRE WARREN NORTH

BEACONSFIELD UPPER

340,000

340,000

350,000

350,000

360,000

360,000

370,000

370,000

380,000

380,000

390,000

390,000

5,730

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5,730

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5,740

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5,740

,000

5,750

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5,750

,000

5,760

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5,760

,000

5,770

,000

5,770

,000

5,780

,000

5,780

,000

5,790

,000

5,790

,000

G:\31\22421\CADD\GIS\Projects\PE13-Hydrology and Hydraulics\Working Figures\019_A3_Monitoring_Sites.mxd

1:210,0000 3 6 91.5

Kilometres (at A3)





Figure 2-1


31-22421

15 May 2008

Water Quality Monitoring Sites

Date



LegendMonitoring Sites

Major Town

Waterway Crossing

Section Break

Major Roads




CMA Boundary

River

Stream

Channel / Drain

Connector

2.3.4 Existing Water Quality

This section provides a summary of the water quality within each of the major waterways where data is available. The available data and results summaries are provided in Appendix B.

�� Bunyip River

The long-term water quality monitoring results recorded TN and Zn concentrations in excess of SEPP guidelines. The most upstream sites monitored, Labertouche and Longwarry North, exceeded SEPP guidelines for Suspended Solids. This aligns with the high levels of erosion described in the Western Port Sediment study. The most downstream site monitored, at Koo-Wee-Rup Road, exceeds SEPP guidelines for Turbidity and TP. Additionally, the upstream Longwarry North and Iona sites exceed SEPP guidelines for E. coli indicating faecal contamination has occurred, most likely originating from the agricultural landuses present in the catchment.

The Western Port Sediment study indicated that the Bunyip River catchment contributes significant amounts of sediment to Western Port (CSIRO, 2003). The dominant sources of sediment is subsoil from channel and gully erosion (CSIRO, 2003) which is often unstable due to vegetation clearance.

�� Lang Lang River

The Melbourne Water long-term water quality monitoring results recorded TN, TP, E.coli and Zn concentrations in excess of SEPP guidelines. The elevated nutrient results are typical of agricultural catchments such as this.

The most downstream site, at South Gippsland Highway site also exceeds SEPP guidelines for turbidity and Pb. The Pb concentrations at this site are elevated significantly above that reported in other waterways investigated. This may reflect the proximity of the monitoring site to the major transport route. The Western Port Sediment study indicated that the Lang Lang River catchment contributes significant amounts of sediment to Western Port (CSIRO Land and Water, 2003). The dominant source of sediment is subsoil from channel and gully erosion and eroded clay banks to the north west of the Lang Lang Jetty (CSIRO Land and Water, 2003).

�� Toomuc Creek

The Melbourne Water long-term monitoring results recorded Turbidity, TN, TP and Zn concentrations in exceedance of SEPP guidelines. These exceedances are likely to be the result of past and current agricultural activities and more recent urbanisation. Clearing within the catchment is likely to have resulted in increased erosion and therefore sediment contributions to waterways which has significantly reduced the water quality within the catchment (Cardinia Shire Council, 2007).


�� Eumemmerring Creek

The Melbourne Water long-term water quality monitoring results highlight an exceedance of all parameters, with the only exception being Pb. These results can be attributed to the high level of urbanisation within the catchment. The Transfer Pipeline does not cross the Euememmerring Creek, however it does cross Ti-Tree creek which is within the Euememmerring catchment. Recent urbanisation within the vicinity of the crossing location may have impacts upon water quality within Ti Tree and therefore Euememmerring Creek.

�� Deep Creek

The Melbourne Water long-term water quality monitoring results recorded S S, Turbidity TN, TP, E.coli and Zinc concentrations in excess of SEPP guidelines. The turbidity and suspended solids levels at this site are elevated significantly above that reported in other waterways. This may indicate high levels of disturbance and erosion in the Deep Creek catchment.


The Melbourne Water long-term water quality monitoring results recorded TN, TP and Zn concentrations in excess of SEPP guidelines. The upstream site, at Upper Beaconsfield also exceeded SEPP guidelines for suspended solids. The downstream site, at Ballarato Road exceeded SEPP guidelines for turbidity. Both elevated turbidity and SS may indicate high levels of disturbance and erosion in the catchment.

Bass River Catchment The VWR long term water quality monitoring results for the Bass River recorded TN, TP, Pb and Zn concentrations in excess of SEPP guidelines. The Znconcentrations at the Bass River site are elevated significantly above that reported in other waterways investigated.

Powlett River Catchment The VWR water quality monitoring results for the Powlett River recorded TN and TP concentrations in excess of SEPP guidelines. The downstream Wonthaggi site also reported the maximum turbidity and SS measurements of all sites monitored. Elevated turbidity and SS may indicate high levels of disturbance and erosion in the catchment.

2.4 River Health Regional River Health Strategies (RRHS) have been developed in partnership with relevant stakeholders in order to protect or improve the health of rivers, streams and floodplains. These documents outline an integrated approach for improving the health of rivers and creeks and document the current health of the major waterways.


The Proposed Transfer Pipeline alignment crosses through West Gippsland and Port Phillip and Westernport and Catchment Management Authority areas. Each catchment management authority has its own RRHS. Further information can be found within the Port Phillip and Westernport RRHS (Melbourne Water, 2007a) and the West Gippsland RRHS (West Gippsland CMA, 2007b). The River Health Strategies each use an assessment criteria to determine the condition of the major waterways in order to define appropriate management goals. The condition of the major waterways crossed by the Proposed Transfer Pipeline is summarised in the sections below and in Figure 2-3.

2.4.1 West Gippsland RRHS assessment of waterway condition

The ISC methodology, developed by the Department of Sustainability and Environment, is used to provide an integrated assessment of river health. This measure uses five sub-indices to assess condition. These include:

�� Hydrology;

�� Physical form;

�� Streamside zone;

�� Water quality; and

�� Aquatic life.

Each of these components is given a score between 0 and 10 based on the assessment of a number of indicators. These scores are then combined to give a qualitative condition rating.

Powlett River Catchment The Proposed Transfer Pipeline will cross through the lower reaches of the Powlett River, however there is no current assessment available of river health within the locality of the crossing point. There are four ISC sites in the upper reaches of the Powlett Catchment. The ISC assessment indicated that the Powlett River is between very poor to moderate condition. Reach 5 indicated that the river health is in moderate condition, while the Reach 6 assessment indicated that river health is in very poor condition (www.vicwaterdata.net Table 4). Sub-index data was not available for the other two reaches for the purposes of this assessment, however the summary results indicate that these sites are both in poor condition.

Table 4 Summary of ISC Ratings for the Powlett River (Reaches 5 and 6)

Condition Rating

Water Quality

Aquatic Life

Physical Form

StreamsideZone

Hydrology

Powlett River Reach 5

4 4 3 Notavailable

5

Powlett River Reach 6

1 3 3 Notavailable

Notavailable

Source: Victorian Water Resources Data Warehouse (www.vicwaterdata.net)


This ISC assessment indicates that there is one priority site (that which scored very poor) requiring management action.

The significant risks within this catchment include bank erosion, barriers to fish migration, channel modification, poor water quality, exotic flora, loss of riparian vegetation, loss of instream habitat, introduced fauna and stock access to the riparian zone.

As a result of the ISC and subsequent prioritisation process a number of key management areas were identified:

�� Revegetation;

�� Fencing;

�� Exotic vegetation removal; and

�� Bed and bank stabilisation.

2.4.2 Port Phillip and Westernport RRHS assessment of waterway condition

Melbourne Water, acting as caretaker for the Port Phillip and Westernport area, use their Index of River Condition (IRC) methodology to provide an overall measure of the condition of waterways. This method is based upon the Index of Stream Condition (ISC) developed by the Department of Sustainability and Environment for rural rivers and creeks. The IRC assessment considers a combination of five sub-indices to assess the condition of each waterway. These sub-indices include:

1. Hydrology or flows – how close to natural they are in terms of quantities and timing;

2. Physical form – the condition of the waterway channel (bed and banks) and associated aquatic habitats;

3. Streamside zone – the type and extent of vegetation along the waterway;

4. Water quality – the physical and chemical characteristics of the water; and

5. Aquatic life – the makeup of the aquatic macroinvertebrate community.

Bass River Catchment A summary of the IRC assessment is provided in Table 5 below.

Table 5 Summary of IRC Ratings for the Bass River

Condition Rating

Water Quality

Aquatic Life

Habitat & Stability

Vegetation Flow

Excellent X

Good X X

Moderate X X

Poor

Very Poor


Overall, the IRC assessment indicates that the Bass River is in moderate condition, however it does have pockets of good condition (Melbourne Water, 2007a). In addition, there are sites of geological, Aboriginal and European heritage value within the catchment and the river is valued for fishing. The lower reaches of the Bass River include a valued saltmarsh community that is important for bird and fish populations.

Key risks to the waterway includes stock access and weed infestations and sediment contributions from Bass River pose a risk to the health of the highly valued Western Port.

As a result of the assessment completed as a part of the RRHS, a range of river health objectives have been set. Future works within the Bass River catchment will include:


�� Weed control;

�� Fencing;

�� Gully and catchment erosion control;

�� Development of a waterway plan; and

�� Establishment of a water quality, fish and aquatic macroinvertebrate monitoring programme.

Lang Lang River Catchment A summary of the IRC assessment is provided in Table 6 below (Melbourne Water, 2006a).

Table 6 Summary of IRC Ratings for the Land Lang River

Condition Rating

Water Quality

Aquatic Life

Habitat & Stability

Vegetation Flow

Excellent

Good X

Moderate X X

Poor X

Very Poor X

Overall, the IRC assessment indicates that the environmental values are moderate to low. However, the middle reaches of the Lang Lang River and some sections of smaller rivers such as Adams and Red Bluff Creeks are in better condition (Melbourne Water, 2007).


Several listed fauna species have been recorded within the catchment, including native fish, platypus, frogs, swamp antechinus and the Giant Gippsland Earthworm (Melbourne Water, 2007a). In addition native orchids and the Strzelecki Gum are found within the catchment. There are European heritage and fishing sites considered to be of social value within the catchment.

The major risks to the catchment include a lack of streamside vegetation, stock access, changes to natural stream flows, poor water quality and barriers to fish (Melbourne Water, 2007a).

As a result of the assessment completed as a part of the RRHS, a range of river health objectives have been set. Future works within the Lang Lang River catchment will include:

�� Stabilisation of waterways and gullies to reduce sediment loads to Western Port;

�� Construction of fishways;

�� Weed control;

�� Revegetation; and

�� Control of stock access to waterways.

Bunyip River Catchment The IRC assessment for the Bunyip Catchment is separated into two separate sections which includes the Lower Bunyip River (Table 7) and the Middle/Upper Bunyip (Table 8).

Table 7 Summary of IRC Ratings for the Lower Bunyip River

Condition Rating

Water Quality

Aquatic Life

Habitat & Stability

Vegetation Flow

Excellent

Good X X

Moderate

Poor X X

Very Poor X


Table 8 Summary of IRC Ratings for the Middle/ Upper Bunyip River

Condition Rating

Water Quality

Aquatic Life

Habitat & Stability

Vegetation Flow

Excellent X X

Good X X

Moderate X

Poor

Very Poor

The Lower Bunyip includes Yallock Creek, Monomeith Drain and the Bunyip River and its tributaries from the Princes Highway to Western Port near Koo Wee Rup. The proposed Transfer Pipeline Alignment crosses through the Lower Bunyip Catchment. Overall, the IRC assessment indicates that the environmental values for the Lower Bunyip River are moderate to poor. Despite this, significant fauna species such as the Australian Grayling, azure kingfisher, Giant Gippsland Earthworm and Growling Grass Frog are present (Melbourne Water, 2007a).

The Lower Bunyip and Yallock river systems have significant agricultural, European heritage, Aboriginal heritage and fishing values.

The key risks to the catchment and downstream receiving waters includes poor water quality, a lack of streamside vegetation, stock access, changes to natural stream flows and barriers to migration of fish and other aquatic life.

As a result of the assessment completed as a part of the RRHS, a range of river health objectives have been set. Future works within the Lower Bunyip catchment will include:

�� Water Quality improvement;

�� Stream flow management;

�� Channel improvement;


�� Stock access control.

Cardinia, Toomuc, Deep, Gum Scrub and Ararat Creeks

A summary of the IRC assessment is provided in Table 9 below (Melbourne Water, 2006a).


Table 9 Summary of IRC Ratings for Cardinia, Toomuc, Deep and Ararat Creeks

Condition Rating

Water Quality

Aquatic Life

Habitat & Stability

Vegetation Flow

Excellent

Good X X X

Moderate

Poor X X

Very Poor

The Transfer Pipeline Alignment crosses through Cardinia, Toomuc, Deep and Gum Scrub Creeks. Overall, the IRC assessment indicates that the environmental values for these waterways are poor. Despite this, native fish, frogs and swamp skink do exist in the catchment. In addition platypus have successfully re-established in upper Cardinia after translocation programmes (Melbourne Water, 2007a). Cardinia has important European heritage and fishing values.

The most significant risks to river health are urban development, loss of streamside vegetation, stock access, poor water quality, and altered stream flow regimes (Melbourne Water, 2007a).

As a result of the assessment completed as a part of the RRHS, a significant range of river health objectives have been set. Future works within this catchment will include:

�� Protection of heritage and recreation values;

�� Stormwater management plans;

�� Water quality improvements;

�� Management of stream flow diversions;

�� Weed management;

�� Stock control;


�� Stabilisation works

Eumemmerring Creek A summary of the IRC assessment is provided in Table 10 below (Melbourne Water, 2006a).


Table 10 Summary of IRC Ratings for Eumemmerring Creek

Condition Rating

Water Quality

Aquatic Life

Habitat & Stability

Vegetation Flow

Excellent

Good

Moderate X X X X

Poor X

Very Poor

Overall, the IRC assessment indicates that the environmental values for the waterways within the Eumemmerring Creek are poor. However, the threatened Growling Grass Frog and Dwarf Galaxias are present within the catchment.

Key risks to river health are urban stormwater, barriers to fish migration, weeds and a lack of riparian vegetation.

As a result of the assessment completed as a part of the RRHS, a range of river health objectives have been set. Future works within this catchment will include:

�� Implementation of stormwater plans;

�� Waterway management plans; and

�� Protection of heritage values.


DRAFT

CARDINIA BAW BAW

BASS COAST

SOUTH GIPPSLAND

CASEY

KNOX

BASS COAST

YARRA RANGES

MORNINGTON PENINSULA

YARRA RANGES

GREATER DANDENONG

MORNINGTON PENINSULA

BASS

COWES

NYORA

RHYLL

BUNYIP

WARNEET

POOWONG

BERWICK

WOOLAMAI

KILCUNDA

PAKENHAM

SAN REMONEWHAVEN

LONGWARRY

WONTHAGGI

CORINELLA

LANG LANG

CORA LYNN

GRANTVILLE

JAM JERRUP

CRANBOURNE

BUNYIP RIVER

BASS RIVER

CA

RD

INIA

CR

EEK

LANG L

ANG RIV

ER

TOO

MUC CREEK

POWLETT RIVER

TARAGO RIVER

ARARAT CREEK

360,000

360,000

380,000

380,000

400,000

400,000

5,720

,000

5,720

,000

5,740

,000

5,740

,000

5,760

,000

5,760

,000

5,780

,000

5,780

,000

5,800

,000

5,800

,000

G:\31\22421\CADD\GIS\Projects\PE13-Hydrology and Hydraulics\MXD files\RiverCondition_PIPE_rev_a.mxd

1:250,0000 2 4 6 8 101

Kilometres (at A3)





Figure 2-2


31-22421

21 July 2008

River Health for major waterways crossed by the Transfer Pipeline (Rev E) Alignment

Date



LegendEnvironmental Condition

Excellent

Good

Moderate

Poor

Very Poor

InsufficientData

Towns

River

Stream

Channel / Drain

Connector

Desalination PlantSite Boundary

Municipality Boundary

Current Transfer Pipe Alignment (30m)

2.4.3 Transfer Pipeline Alignment Flora and Fauna Assessment

Transfer pipeline construction can potentially impact upon both terrestrial and aquatic flora and fauna. Construction activities may increase sediment transport within waterways if appropriate mitigation measures are not implemented, which could lead to sedimentation instream. This can affect the distribution of species by altering important instream habitats. Construction through waterways may also result in a loss of instream vegetation and large wood which provide important habitat for instream organisms. Riparian vegetation may need to be cleared for construction resulting in a loss of shade, habitat, organic matter inputs to waterways and enhanced sediment transport. Construction activities for the Transfer Pipeline may result in a negative consequence for flora and fauna (Section 4.2.3).

Biosis Research Pty Ltd has undertaken an ecological values study as part of their Flora and Fauna Assessment for the Desalination Project (Biosis, 2008). This assessment has incorporated terrestrial and aquatic flora and fauna investigations. The aquatic ecology investigations are particularly relevant to this report. Biosis have undertaken fish surveys upstream and downstream of the waterway crossing locations. Findings from Biosis’ studies have been summarised within the waterway crossing proformas (Appendix D).

2.5 Waterway Characteristics

2.5.1 Assessment Method

The assessment of the existing waterway condition and type has been based on desktop assessment and field investigation.

Topographic maps overlaid with Melbourne Water and Vic Maps waterways layers were reviewed to identify waterways that would be crossed by the Transfer Pipeline. During this process 100 waterways were identified as being directly crossed by the Transfer Pipeline alignment.

Aerial investigation was undertaken at all sites and field based investigation was undertaken at 70 sites. Waterway assessment proformas (Appendix D) have been established for this report to concisely document the findings of the assessment at each crossing location. The variables considered within the assessment include:

�� Channel planform (the shape and layout of the channel as seen from above). Channels along the alignment are generally:

– Meandering (a sinuous bend in a waterway which forms a U-shape with the potential for oxbows). Waterways displaying this planform often have oxbows (U-shaped forms) on floodplains which can contain water.

– Sinuous (A channel that is not straight, however does not bend in a U-shape);

– Straight (a generally straight river due to natural stream processes rather than physical human modification); and

– Channelised (artificially straightened).


�� Instream geomorphic features (bank height, top of bank width, channel width, channel shape);

�� Floodplain geomorphic features (floodplain width, floodplain position, typical slope, geomorphic features);

�� Geology;

�� Flow conditions (frequency of flow). Channels along the alignment are generally:

– Ephemeral - Waterways with flow for more than one month of the year, but with a period of no flow during the year;

– Intermittent - Waterways flowing for less than one month of the year;

– Perennial - Waterways with flow all year;

�� Land management (fencing, landuse); and

�� Riparian and instream vegetation.

Soil degradation is considered for the purposes of this project to include bed, bank and floodplain erosion potential. Further geomorphic and geological based assessment of soil degradation, including acid sulphate soils, compaction, sedimentation, slope failure, subsidence and soil erodability is considered within Rosengren (2008).

2.5.2 Waterways classification along the alignment

Based upon aerial and site investigation eight broad waterway types have been identified along the Transfer Pipeline alignment

These waterway types include:

Unconfined Sinuous Waterway Channel planform is generally sinuous to meandering and is controlled by floodplain cohesiveness. These systems are generally located within flatter topography areas where they are likely to be competence limited.

Unconfined Channelised Waterway These waterways have been channelised in order to increase drainage efficiency. These systems sometimes have levee banks which often consist of fill material deposited along the banks during excavation. In places, these levees act as flood control structures.

Partially Confined Sinuous Channel Partially confined sinuous channels are characterised by sinuous to meandering planforms with alternating floodplain pockets. Floodplain geomorphic units often include alluvial fans or paleochannels.


Partially Confined Channelised Waterway These systems occur on waterways which would have once presented as partially confined sinuous channels. These systems show evidence of historic channel alignments and oxbows indicating meander bend cutoffs. The current channel planform is a result of channel straightening during landuse change.

Confined Headwater Channel Confined headwater systems are pinned against the valley margin within steep headwater valley settings. The channel is generally well defined, however in some cases the channel may be discontinuous as a result of direct valley inputs. Channel planform is straight to slightly sinuous with no floodplain pockets and is controlled by the valley margins. Streampower is relatively high and these waterways are likely to act as sediment source zones.

Valley Fill Valley fill systems are laterally unconfined systems with no defined bed and banks. These waterway types generally occur in zones with flat topography where channels are transport limited. Over time valleys will have filled with fine sediment to create relatively flat and featureless plains on the valley floor. Some isolated definition may occur in places, however channels are generally discontinuous or without defined bed and banks.

Some sections of the easement have more defined bed and bank valley fill systems, these are likely to be the result of channel straightening, excavation and draining.

Farm/Road Drain – Channelised These systems generally occur on waterways which would have once presented as Valley Fill systems. Channelisation and straightening as a result of agricultural land use and road drainage schemes will have altered the path of these waterways greatly affecting drainage patterns.

Farm Dam The Transfer Pipeline crosses some constructed farm dams. Generally, dams that will be directly affected by the Transfer Pipeline alignment are off line, however some downstream dams may be indirectly impacted by construction.

The distribution of these waterway types along the Proposed Transfer Pipeline are summarised in Table 11.


Tabl

e 11

Su

mm

ary

tabl

e of

the

dist

ribut

ion

of w

ater

way

type

s al

ong

the

alig

nmen

t

Cat

chm

ent

Cla

ssifi

catio

n N

amed

Wat

erw

ays

Cro

ssin

g nu

mbe

r

Unc

onfin

ed S

inuo

us W

ater

way

P

owle

tt R

iver

10

5

Par

tially

Con

fined

Sin

uous

Cha

nnel

W

ools

hed

Cre

ek a

nd B

ridge

C

reek

12

0, 1

19

Pow

lett

Riv

er C

atch

men

t

Farm

/Roa

d D

rain

Cha

nnel

ised

U

nnam

ed w

ater

way

s 10

3, 1

04

Par

tially

Con

fined

Cha

nnel

ised

Wat

erw

ay

3905

Trib

of 3

904

112

Farm

/Roa

d D

rain

Cha

nnel

ised

U

nnam

ed w

ater

way

s 11

3, 1

14, 1

21,1

23, 2

08,

225,

226

3906

Trib

of 3

903

115

3903

Trib

of 3

901

116

Dam

Unn

amed

wat

erw

ays

213,

228

Unc

onfin

ed C

hann

elis

ed W

ater

way

G

eorg

e C

reek

22

9

3907

Trib

of 3

905

219

Unn

amed

wat

erw

ay

124

Unc

onfin

ed S

inuo

us W

ater

way

U

nnam

ed w

ater

way

s 21

4

Par

tially

Con

fined

Sin

uous

Cha

nnel

U

nnam

ed w

ater

way

s 22

2, 2

27, 3

02, 3

03

3305

Trib

of B

ass

Riv

er

230

Bas

s R

iver

Cat

chm

ent

3306

Trib

of B

ass

Riv

er

212

3031

/224

461/

3/1

4757

2

D

esal

inat

ion

Proj

ect

Fina

l Im

pact

Ass

essm

ent f

or S

urfa

ce W

ater

, Hyd

rolo

gy a

nd W

ater

way

Cro

ssin

gs fo

r the

Tra

nsfe

r Pip

elin

e

Cat

chm

ent

Cla

ssifi

catio

n N

amed

Wat

erw

ays

Cro

ssin

g nu

mbe

r

Tenn

ent C

reek

23

1

3311

Trib

of B

ass

Riv

er

223

Bas

sR

iver

224

Con

fined

Hea

dwat

er C

hann

el

Unn

amed

wat

erw

ays

301,

304

, 305

, 326

Con

fined

Hea

dwat

er C

hann

el

Trib

of 3

831

320

Cre

ek 3

831

329

Unn

amed

wat

erw

ays

319,

321

, 322

, 323

, 328

Farm

/Roa

d D

rain

Cha

nnel

ised

P

eack

Roa

d D

rain

34

1

Unn

amed

wat

erw

ays

340,

, 405

, 406

, 407

, 40

8, 4

21

Val

ley

Fill

Unn

amed

wat

erw

ays

418,

419

Sou

th G

ipps

land

Coa

stal

R

iver

s an

d C

reek

s

Unc

onfin

ed C

hann

elis

ed W

ater

way

R

ed B

luff

Cre

ek

420

Unc

onfin

ed C

hann

elis

ed W

ater

way

Ada

ms

Cre

ek S

outh

Bra

ch

410

Unn

amed

wat

erw

ay

411

Low

er L

ang

Lang

Riv

er

420

Mon

omei

th D

rain

50

1, 5

02, 5

03, 5

04, 5

05

Val

ley

Fill

Unn

amed

wat

erw

ay

422

Lang

Lan

g C

atch

men

t

Farm

/Roa

d D

rain

Cha

nnel

ised

M

onm

eith

Dra

in

529,

530

, 531

, 532

, 533

3131

/224

461/

3/1

4757

2

D

esal

inat

ion

Proj

ect

Fina

l Im

pact

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ent f

or S

urfa

ce W

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, Hyd

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ater

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Cro

ssin

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r the

Tra

nsfe

r Pip

elin

e

Cat

chm

ent

Cla

ssifi

catio

n N

amed

Wat

erw

ays

Cro

ssin

g nu

mbe

r

Unn

amed

wat

erw

ays

427,

428

, 534

Unc

onfin

ed C

hann

elis

ed W

ater

way

Y

allo

ck C

reek

50

8

Yal

lock

Out

fall

Dra

in

509

Sou

ther

n B

ound

ary

Dra

in

510

Yal

lock

Cut

& L

evee

52

6

Sou

th E

ast C

atch

men

t Dra

in

535

Bun

yip

Riv

er M

ain

Dra

in

514

Nor

th W

est C

atch

men

t Dra

in

515

Val

ley

Fill

Unn

amed

wat

erw

ays

511

Farm

/Roa

d D

rain

Cha

nnel

ised

H

imbe

ck's

Dra

in

516

Gra

y's

Dra

in51

2

McD

onal

d’s

Cat

ch D

rain

53

6, 5

37

McG

rego

rs D

rain

539

Bun

yip

Cat

chm

ent

McD

onal

d’s

Dra

in 3

043

538

Farm

/Roa

d D

rain

Cha

nnel

ised

H

agel

thor

nes

Dra

in

540

Unn

amed

wat

erw

ays

541

Unc

onfin

ed C

hann

elis

ed W

ater

way

D

eep

Cre

ek C

atch

men

t Dra

in

542

Toom

uc C

reek

Cat

chm

ent

Low

er T

oom

uc C

reek

54

4

3231

/224

461/

3/1

4757

2

D

esal

inat

ion

Proj

ect

Fina

l Im

pact

Ass

essm

ent f

or S

urfa

ce W

ater

, Hyd

rolo

gy a

nd W

ater

way

Cro

ssin

gs fo

r the

Tra

nsfe

r Pip

elin

e

Cat

chm

ent

Cla

ssifi

catio

n N

amed

Wat

erw

ays

Cro

ssin

g nu

mbe

r

Low

er D

eep

Cre

ek D

rain

54

3

Low

er G

um S

crub

Cre

ek

545

Car

dini

aD

rain

62

1

Car

dini

aC

atch

men

tDra

in62

2

Val

ley

Fill

Unn

amed

Wat

erw

ays

422,

623

, 624

Val

ley

Fill

Unn

amed

wat

erw

ays

606,

607

, 608

Farm

/Roa

d D

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2.5.3 Transfer Pipeline Alignment Geology and Geomorphology

The geology and geomorphic setting acts as a key factor determining waterway character.

Geology plays a role in creating waterway characteristics. The cohesiveness of sediments assist in creating waterway shape. Cohesive sediments within bed or banks of waterways hinder their ability to move either downwards (through channel incision) or sideways (through lateral migration). Uncohesive sediments within bed and banks will allow for much freer movement of the waterway. As a result, the sediments within and surrounding the channel play a part in defining channel stability. An understanding of the surface and superficial sediments can provide some understanding of the likelihood of erosion and sediment transport within the waterway.

Construction activity within uncohesive and therefore unstable sediments is more likely to contribute to bank instability and sediment transport in the waterway than cohesive sediments. In addition, construction within waterways with unstable soils may lead to failure of the bed or banks. Further geological and geotechnical investigation is required to ascertain soil stability and construction risk.

The Proposed Transfer Pipeline alignment encompasses a wide range of different geological units and landforms. Rosengren (2008) provides further information on the geology along the grid connection alignment.

A separate geomorphology report (Rosengren, 2008) has been written for the purposes of the EES process. Rosengren (2008) notes that the geomorphology of the Transfer Pipeline corridor is described as a series of nine Terrain Units with distinctive landforms, surficial geology and soils (Figure 2-4, Table 12). Detailed descriptions of these terrain units are outlined within Rosengren (2008).


Figure 2-3 Terrain Units of the Transfer Pipeline corridor. See Table 1 for details (Rosengren, 2008)


Table 12 Terrain units of Transfer Pipeline corridor (Rosengren, 2008)

No Terrain Unit Name Geology Geomorphology

1 Powlett River valley Mesozoic sediments, Quaternary alluvium

Tidal & river floodplain, low ridges

2 Strzelecki Ranges Mesozoic sediments Steep ridges and valleys, rounded crests

3 Bass valley & floodplain Quaternary sediments Alluvial & colluvial fans, floodplain and channel, cutoffs

4 Heath Hill Ridge Palaeogene and Neogene volcanics & sediments overlying Mesozoic sediments

Low plateau, weakly incised valleys

5 Gurdies – Jam Jerup coast

Palaeogene and Neogene sediments

Colluvial fans, gently sloping plain and low ridges

6 Lang Lang & Tobin Yallockplain

Quaternary sediments – drained swamps

Level plain with drains and old river channel traces

7 Koo-wee-rup Plain


Level plain with drains and old river channel traces, low sand ridges

8

Western-port plains (including drained swamp-lands)

Cardinia-Dalmore Plain


Level plain with drains and old river channel traces

9 Berwick low ridges Palaeogene basalt overlying Silurian sediments

Plain and low ridges

2.6 Hydrologic Assessment

2.6.1 Streamflow Hydrology

Available streamflow data from Thiess Pty Ltd and Melbourne Water Corporation has been reviewed to assess the magnitude and seasonality of runoff entering waterways within the Transfer Pipeline. In total, an assessment was undertaken on nine gauged sites where streamflow information was readily available. These are: 227231, 228217, 228222, 227236A, 227209B, 228213, 228228, 228364 and 227219A (Figure2-4). A summary of these analyses is provided in Table 2.


DRAFT

228222Cardinia Creek@ Beconsfield Upper

228364KENNEDY CREEK@ PAKENHAM (KENNEDY ROAD)

228217TOOMUC CREEK

@ PAKENHAM

PORT PHILLIP

228213BUNYIP RIVER @ IONA

228228CARDINIA CREEK

@ CARDINIA

228209LANG LANG RIVER @ HAMILTONS BRIDGE

227219BASS RIVER @ LOCH

227236POWLETT RIVER

@ D/S FOSTER CREEK JUNCTION

227231BASS RIVER

@ GLEN FORBES SOUTH

PORT PHILLIP

WEST GIPPSLAND

PORT PHILLIP

PORT PHILLIP

BUNYIP RIVER

BASS RIVER

CA

RD

INIA

CR

EEK

TOO

MU

C C

REE

K

POW

LETT

RIV

ER

LANG L

ANG RIV

ER

ARARAT CREEK

TARAGO RIVER

DA

ND

ENO

NG

-HA

STIN

GS

RO

AD

BA

SS H

IGH

WAY

STU

D R

OA

D

PRINCES HIGHWAY

HIGH STREET

WHITE ROAD

BASS HIGHWAY

PRINCES HIGHWAY

LOCH

COWES

TYABB

NYORA

RHYLL

BUNYIP

TYNONG

SOMERS

POOWONG

OFFICER

PAKENHAM

GARFIELD

TOORADIN

SAN REMO

NEWHAVEN

HASTINGS

LONGWARRY

CORINELLA

LANG LANG

CRIB POINT

GRANTVILLE

SOMERVILLE

PEARCEDALE

CRANBOURNE

CORONET BAY

KOO-WEE-RUP

CARRUM DOWNS

NARRE WARREN NORTH

BEACONSFIELD UPPER

340,000

340,000

350,000

350,000

360,000

360,000

370,000

370,000

380,000

380,000

390,000

390,000

5,730

,000

5,730

,000

5,740

,000

5,740

,000

5,750

,000

5,750

,000

5,760

,000

5,760

,000

5,770

,000

5,770

,000

5,780

,000

5,780

,000

5,790

,000

5,790

,000

G:\31\22421\CADD\GIS\Projects\PE13-Hydrology and Hydraulics\Working Figures\005_A3_Surfacewater_Gauges.mxd

1:210,0000 3 6 91.5

Kilometres (at A3)





Figure 2-4


31-22421

15 May 2008

Waterway stream gauge information

Date



LegendMajor Town

Waterway Crossing

Surfacewater Gauge

Section Break

Major Roads




CMA Boundary

River

Stream

Channel / Drain

Connector

Table 13 Review of Streamflow Data

Gauge SiteNumber

227231 228217 227219A

228222 227236A 228209B 228213 228228 228364

SiteName

BassRiver at GlenForbesSouth

ToomucCreek at Pakenham

BassRiver at Loch

Cardinia Creek at BeconsfieldUpper

Powlett River at D/S Foster CreekJunction

Lang Lang River at HamiltonsBridge

Bunyip River at Iona

CardinaCreek at Cardina

Kennedy Creek at Pakenham(Kennedy Road)

DataRange

1 April 1973 to 23 Jul 2007

26 June 1964 to 11 Nov 2001

20 Dec 1973 to 7 Jan 2008

2 Feb 1967 to 2 June 1974

19 May 1979 to 25 Nov 2007

29 Feb 1980 to 16 Mar 2008

4 Nov 1971 to 29 Dec 2007

10 April 1974 to 16 Mar 2008

8 Jul 1978 to 16 Mar 2008

Catchment Size of Main River

219.0 41.0 52.0 39.0 228.0 272.0 697.0 117.0 5.0

MeanAnnual Flow

51 000 ML

7 100 ML 15 100 ML

7 900 ML

44 000 ML 53 800 ML 103 800 ML

14 700 ML 580 ML

MeanAnnual Flow perCatchment Area

233ML/km2

173ML/km2

330ML/km2

200ML/km2

195ML/km2

915ML/km2

4 800 ML/km2

540ML/km2

17ML/km2

BaseFlow Index

21% 29% 25% 29% 17% 2% 3% 32% 14%

DataSource

THIESSServicesPty Ltd




MelbourneWater

MelbourneWater

MelbourneWater

MelbourneWater

MelbourneWater


Cardinia Creek has a total catchment area of 70.1 km2. The mean annual flow at the Cardina Creek at Cardinia gauge is approximately 14 700 ML (or 540 ML/km2) varying between 26 250 ML in high flow years (1967) and 5 300 ML in low flow years (1997). Streamflow at this location is seasonal with the lowest monthly flows occurring during the November to May period and higher flows occurring during the June to October periods, as illustrated in Figure 2-5 below.

Figure 2-5 Monthly Streamflows Cardina Creek at Cardina

Monthly Streamflow - 228228 Cardina Creek @ Cardina

0

1000

2000

3000

4000

5000

6000

January February March April May June July August September October November December

Month

Flow

(ML/

mon

th)

Monthly AverageLowest Flow (1997)Highest Flow (1989)

Peak Flows

The Bunyip River has a total catchment area of about 904 km2. The mean annual flow at the Bunyip River at Iona gauge is approximately 103 800 ML (or 4 800 ML/km2)varying between 263 900 ML in high flow years (1996) and 5 530 ML in low flow years (2007). Streamflow at this location is seasonal with the lowest monthly flows occurring during the December to June period (with high flows in April) and higher flows occurring during the June to October periods, as illustrated in Figure 2-6 below.

Figure 2-6 Monthly Streamflows Bunyip River at Iona

Monthly Streamflow - 228213 Bunyip River @ Iona

0

5000

10000

15000

20000

25000

30000

35000

40000

45000


Month

Flow

(ML/

mon

th)


Peak Flows


Toomuc Creek is a medium sized sub-catchment (area 41 km2) located in the Toomuc River catchment. The mean annual flow is approximately 7 100 ML (or 175 ML/km2).Streamflow at this location is also seasonal and the lowest average daily flows occurring during the November to March period, and higher flows occurring during the April to October periods, as illustrated in Figure 2-7 below. The baseflow in this stream, (i.e. the contribution from groundwater) represents about 29% of the total flow to the stream.

Figure 2-7 Monthly Streamflows Toomuc Creek at Pakenham

Monthly Streamflow - 228217 Toomac Creek @ Pakenham

0

500

1000

1500

2000

2500

3000

3500

4000


Month

Flow

(ML/

mon

th)


Peak Flows

The Bass River has a total catchment area of 507 km2. The mean annual flow at the Bass River at Glen Forbes gauge is approximately 51 620 ML (or 222 ML/km2) varying between 87 175 ML in high flow years (1996) and 8 274 ML in low flow years (2006). Streamflow at this location is seasonal with the lowest monthly flows occurring during the November to May period (with higher flows in April) and high flows occurring during the June to October periods, as illustrated in Figure 2-8 below.


Figure 2-8 Monthly Streamflows Bass River at Glen Forbes South

Monthly Streamflow - 227231 Bass River @ Glen Forbes South

0

5000

10000

15000

20000

25000

30000

Janu

ary

Februa

ryMarc

hApri

lMay

June Ju

ly

Augus

t

Septem

ber

Octobe

r

Novem

ber

Decem

ber

Month

Flow

(ML/

mon

th)


Peak Flows

2.6.2 Flood Frequency Analysis

Available streamflow data from Thiess Pty Ltd and Melbourne Water Corporation has been reviewed to assess the magnitude of flooding within the Transfer Pipeline. A flood frequency analysis was undertaken of the recorded peak flows at the gauging stations in order to validate the design parameters.

�� 227231 (Bass River at Glen Forbes South);

�� 228217 (Toomuc Creek at Pakenham);

�� 228213 (Bunyip River at Iona);

�� 228209B (Lang Lang River at Hamiltons Bridge); and

�� 227219 (Bass River at Loch).

The period of record of peak flows at the gauge stations are outlined in Table 13above.

A historical flood frequency curve (Log Pearson III) was then produced, using the methodology outlined in Australian Rainfall and Runoff, for maximum instantaneous flows at each gauging station for the period of data available. Table 14 below summarises the results of the historical flood frequency analysis. Each gauging station was transposed using the relationship of flows (Q) and areas (A) (QTotal = QGauging x A0.7

Gauging/A0.7Total) to calculate the relative historical flood frequency

analysis at each Transfer Pipeline waterway crossing location.


Tabl

e 14

Pr

elim

inar

y flo

od fr

eque

ncy

anal

ysis

of s

trea

m g

augi

ng s

tatio

ns tr

ansl

ated

to ri

ver c

ross

ings

(ML/

day)

AR

I(Y

ears

)

Gau

geTo

omuc

Cre

ek a

t Pa

kenh

am

Toom

ucC

reek

(S

ite52

5)

Gau

geB

unyi

p R

iver

at

Iona

Bun

yip

Riv

er

(Site

514)

Yallo

ckC

reek

(S

ite 5

09)

Gau

ge L

ang

Lang

Riv

er

at Ham

ilton

sB

ridge

Lang

Lang

Riv

er (S

ite

414)

Gau

ge B

ass

Riv

er a

t Loc

h

Gau

ge B

ass

Riv

er a

t Gle

n Fo

rbes

Sou

th

(Site

218

)

100

2500

3500

1010

0 10

300

5300

9800

1205

0 31

5058

00

5030

0042

0012

200

1240

0 64

0012

800

1565

0 35

5062

00

2035

0049

0014

700

1500

0 78

0016

800

2060

0 40

0066

00

1038

0052

0016

500

1680

0 87

0020

000

2450

0 42

0068

00

Not

es -

Ave

rage

Rec

urre

nce

Inte

rval

(AR

I) - T

he lo

ng-te

rm a

vera

ge n

umbe

r of y

ears

bet

wee

n th

e oc

curr

ence

s of

a fl

ood

equa

l too

or l

arge

r tha

n th

e se

lect

ed e

vent

. Fo

r exa

mpl

e,flo

ods

with

a d

isch

arge

equ

al to

o or

gre

ater

than

the

20 y

ear A

RI f

lood

eve

nt w

ill o

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on

aver

age

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ry 2

0 ye

ars.

- Site

s ar

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in A

ppen

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A

-T

hese

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limin

ary

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uenc

y re

sults

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e be

en d

eter

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ed u

sing

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k in

form

atio

n ob

tain

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om th

e st

ream

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ges

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ul a

s ba

ckgr

ound

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rmat

ion

in

unde

rsta

ndin

g th

e ca

tchm

ents

and

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tive

flow

mag

nitu

des.

To

appr

opria

tely

ass

ess

the

flood

ing

risk,

the

inte

nt w

ould

be

to re

late

the

flow

mag

nitu

des

to th

e ba

nkfu

ll flo

w

cond

ition

s fo

r the

wat

erw

ay c

hann

el a

nd fl

oodp

lain

cha

ract

eris

tics.

Mor

e de

taile

d su

rvey

info

rmat

ion

will

be

requ

ired

to u

nder

take

the

hydr

aulic

ass

essm

ent.

4231

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Fina

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ater

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ater

way

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gs fo

r the

Tra

nsfe

r Pip

elin

e

2.6.3 Sustainable Diversion Limits

SDLs have been developed across Victoria and represent the upper limit on winterfill diversions, beyond which there is an unacceptable risk that additional extractions may degrade the environment. The SDLs for the catchments where the Transfer Pipeline intersects are summarised below in Table 15.

Table 15 Summary of Sustainable Diversion Limits

Catchment SDL (ML) Total Use (ML) Bulk Entitlement (ML)

Powlett River 7 246 3 960 854

Bass River 4 919 2 108 336

South Gippsland Coastal Rivers and Creeks

1 057 497 0

Lang Lang River 7 333 3 260 0

Bunyip River 11 002 20 589 16 963

Toomuc Creek 2 030 2 995

The SDL estimates show that the Powlett River, Bass River, South Gippsland Coastal Rivers and Creeks and Lang Lang River catchments are currently under allocated, whilst total use in Bunyip River and Toomuc Creek catchments currently exceed the SDL.

The Bulk Entitlement (BE) from each catchment is the entitlement applied to the rural water authorities on regulated streams, and for urban water authorities on regulated and unregulated streams. The BE restricts the amount of water allowed to be harvested from the catchment under the Water Act 1989.


3. Agency Requirements

3.1 Introduction This section outlines the relevant catchment management authorities responsible for the waterways along the Proposed Transfer Pipeline Alignment and the relevant CMA requirements.

3.2 Catchment Management Authorities There are two Catchment Management Authorities (CMAs) whose jurisdiction is within the Transfer Pipeline alignment.

WGCMA WGCMA is responsible for waterway and catchment management activities across the south to south east Victoria, including the South Gippsland catchment basin.

MWCMWC has a caretaker role in managing the waterways within the Westernport and Port Phillip catchment

3.3 Catchment Management Authority Requirements

3.3.1 Works on Waterway Permit Requirements

Under the Catchment and Land Protection Act 1994 the Catchment Management Authorities (CMAs) were formed as the caretakers of river health for their designated catchments and waterways and have responsibilities. These responsibilities include licensing and regulation of works on their designated waterways, and floodplains and drainage management within their catchments and waterways.

The Works on Waterways permit system is to ensure that works are performed in an environmentally conscientious way and to ensure protection of the waterways. The Catchment Management Authorities (CMAs) issue permits for a person, company or Authority to carry out works on ‘designated’ waterways under By-law No. 1 of the Water Act 1989. “Designated waterway” is defined as any waterway or any part of any waterway which the CMA has declared to be a designated waterway under section 188 of the Act. The CMA are responsible for managing these waterways which have been identified on the VicMap datasets and the Melbourne Water ‘Natural Waterway Centreline’ dataset. A ‘designated’ waterway within the Water Act 1989 has been defined as:

�� A river, creek, stream or watercourse; or

�� A natural channel in which water regularly flows, whether or not the flow is continuous; or

�� A channel formed wholly or partly by the alteration or relocation of a waterway, as described above, or;


�� A lake, lagoon, swamp or marsh.

A more detailed definition of ‘designated’ waterways is available in the Water Act 1989.

The ‘works on waterways’ permit system has been created to protect the waterways and to safeguard that works are performed according to the guidelines. The Transfer Pipeline will require obtaining a works on waterways permit for all locations where the Transfer Pipeline crosses a waterway. Permits will need to be sought from both West Gippsland CMA and Melbourne Water.

3.3.2 Floodplain Management Requirements

Some of the waterways discussed are within the Land Subject to Inundation Overlay (LSIO, DSE, 2008a) as identified in the Bass Coast, Cardinia and Casey Planning Schemes. The LSIO identifies land in a flood storage or flood fringe area, affected by the 1 in 100 year flood or any other area determined by the floodplain management authority. The overlay helps to facilitate appropriate development outcomes that maintain the free passage and temporary storage of floodwaters, minimise flood damage, compatability with the flood hazard and local drainage conditions and will not cause any significant rise in flood level or flow velocity.

A permit is generally required to construct a building or to construct or carry out works within the (LSIO DSE, 2008a). Amongst several standard exceptions to this requirement are “The laying of underground sewerage, water and gas mains, oil pipelines, underground telephone lines and underground power lines provided they do not alter the topography of the land.” Hence in general while the LSIO is informative with respect to flooding along the Transfer Pipeline it does not impose additional flood plain management requirements. If however the Booster Pump Station remains within the LSIO it will be subject to permit requirements to the satisfaction of the relevant floodplain management authority.

3.3.3 Catchment Management Authority Consultation

WGCMA Introductory meetings have been held with WGCMA to discuss their requirements with regards to pipeline construction. WGCMA use the Vic Maps Hydro layer 1:25k to define their designated waterways. From this there will be seven identified waterways crossed within the WGCMA region. The primary concerns of the WGCMA are associated with the construction process. It was noted that perception of bed instabilities or weaknesses which could lead to difficulties for either construction methods including pipe jacking. During the meeting WGCMA also outlined the importance of limiting floodplain topographical alterations. In terms of pipe crossings. WGCMA do not have any set requirements for setting the pipe below bed invert levels, and stated that crossings would need to be assessed on a site-by-site basis.


The WGCMA provided a number of reference documents:

�� Guidelines for Assessment of Applications for Permits and Licences for Works on Waterways, (SKM 2001); and

�� Various standard works procedures for the WGCMA.

Submissions will have to be made to WGCMA for works on waterways prior to construction.

An additional meeting was held with WGCMA representatives on site on 25 July 2008 to discuss methodology applied to determining a recommendation on construction methodology. The WGCMA outlined they would be keen to work closely with the Project Company to agree on construction methodology and appropriate mitigation controls and rehabilitation.

MWCMWC (letter dated 13 February 2008) have previously commented on preferred construction methods for alignment C and have given an indication of the factors that should be considered when selecting an appropriate construction technique. In this letter MWC provided a summary works procedure document for open trenching associated with service crossings.

During a meeting held on 14 March 2008, MWC representatives highlighted the importance of protecting flood bank levees and setting the pipe below the hard invert level. They recommended that a description of each waterway be provided to them to allow them to appropriately assess waterway crossing requirements. This has been undertaken within the scope of this report and the output is located within Appendix D. MWC indicated that approval will need to be sought from them for all transfer pipeline crossings of Melbourne Water assets (including underground assets, waterways, constructed channels, retarding basins and levee banks). Approval from MWC will be required at the design stage and a minimum of two months advanced notification will be required prior to construction commencing to enable evaluation and processing of the application ahead of the construction period.

A recent letter from MWC (dated 5 May 2008) states that for all Melbourne Water assets (including waterways), pipe jacking is the preferred method for crossing all waterway assets, except for minor creek tributaries and depressions where, subject to the findings of the EES, an open-cut construction method could be found to be acceptable.


An additional meeting was held with a Melbourne Water representative on 17 July 2008 with the purpose of discussing appropriate construction methodologies across waterways with relation to alignment D. It was noted that a site visit would need to be undertaken at each waterway crossing prior to construction. It was also outlined that generally, there was enough information available based upon aerial photo analysis and site investigation to make an assessment of the appropriate crossing method and that Melbourne Water largely agreed with the recommended construction methods outlined within a previous version of this document. Melbourne Water clearly outlined that they were implementing a conservative approach to maintain protection of waterways and that they would not be significantly influenced by options that consider incorporating opportunistic improvements in waterway values into their decisions regarding construction methodologies.

Water Authorities Considerations Westernport Water sources water supplies from Tennent creek (Tributary of Bass River), Lance Creek (Tributary of Powlett River), and Bass River (downstream of Candowie Reservoir) to supply towns such as Cowes, San Reno and Grantville. Water supplies from Tennent Creek and Lance Creek will not be impacted by the construction of the Transfer Pipeline. The diversions from the Bass River are used for emergency supply purposes, however this is located downstream of the Transfer Pipeline. Future investigations will need to consider the potential impacts on the streamflow and quality, to avoid impacting this water source (GHD 2007a).

South Gippsland Water sources water from the Little Bass storage system and the Lance Creek (Tributary of Powlett River) to supply towns such as Loch, Nyora, Poowong, Wonthaggi, Inverloch and Cape Paterson. These water sources and supply systems will not be impacted by the construction of the Transfer Pipeline.

Melbourne Water is responsible for bulk water supplies across the Melbourne Metropolitan area. The Transfer Pipeline will not impact on any of Melbourne Water’s supply sources. However, the Transfer Pipeline intersects the Tarago Western Pipeline which is a major water supply main which supplies the Mornington Peninsula. Requirements for crossing this Transfer Pipeline will need to be assessed in subsequent investigations.

Southern Rural Water (SRW) is responsible for managing water supplies for irrigation purposes and for rural water supply across southern Victoria. SRW supply the irrigators of southern Victoria, and water in bulk to non-metropolitan urban water authorities and to Latrobe Valley electricity generators (SRW, 2007).

There are numerous private water users who divert water from streams located downstream of the Transfer Pipeline. This water is typically used for domestic, stock or irrigation purposes. Changes to streamflow regimes and water quality present the greatest risk to these water users. Further investigations are required to locate all water users downstream of the Transfer Pipeline, and to assess the potential impacts on these users during construction.


Downstream users of the construction site may be potentially impacted during construction by the changes to water quality that may be long-term. Final alignment decisions must be made prior to accurate information obtained regarding downstream users. Therefore, further information will be required on potential disruption of water supply to these users during the pre-construction phase to completely assess this potential impact (source GHD 2007a).

The likely private irrigators within the Transfer Pipeline have not yet been identified, however there are potential issues relating to private irrigators, including water quality and flow.

The likely private irrigators within the Transfer Pipeline have not yet been identified. However, there may be users downstream of the Transfer Pipeline south of Cardinia, which will require further investigation and information in future studies. These private diverters will be either customers of Melbourne Water or Southern Rural Water (GHD 2007a).


4. Environmental Risk Assessment

4.1 Introduction The primary purpose of this section is to fulfil the requirements outlined within the following objective:

�� Assess risks of erosion, soil degradation and sedimentation associated with construction of the alignment and any proposed control measures.


Comments:

Section 4.2: Project Risk

This section outlines the overall project risk assessment and details the subsequent risk register for the pipeline component of the project.

Risk Assessment

Section 4.3: Detailed waterway risk assessment

This section outlines the specific risks associated with construction for each waterway crossing for the pipeline component of the project.

4.2 Desalination Project Risk A detailed Environmental Risk and Impact Assessment (risk assessment) has been conducted as part of the EES for the Victorian Desalination Project. The risk assessment process provided a staged, risk based approach for evaluating the potential impacts that the Project could have on a wide range of environmental, social and economic assets and beneficial uses. This study has contributed to this risk assessment process and the results of the risk assessment have been used to form the conclusions of this study.

The risk assessment methodology and implementation has been devised by Maunsell, who are engaged as a technical specialist to GHD on behalf of the Department of Sustainability and Environment (DSE). The development of the risk assessment process, its implementation and its outcomes are documented in the Victorian Desalination Project - Environmental Risk Assessment.

4.2.1 Overview of the Risk Assessment

In summary:

�� The risk assessment was conducted to identify the potential environmental, social and economic impacts on the wider environment and community of implementing the Desalination Project. It should be noted that the risk assessment did not consider the risks posed to DSE or the delivery of the Project. The assessment therefore did not assess reputation, financial delays or organisational effectiveness;

�� The risk assessment was undertaken to heighten confidence and provide rigour for decision making and planning;


�� The risk assessment was based on the Project Description and the outputs of the risk assessment represent the risk and impacts of implementing the Desalination Project as described in the Project Description;

�� The risk assessment was conducted in close consultation with all of the technical specialists and is based on input provided by those technical specialists. All of the risk assessment inputs including consequence and likelihood ratings were provided by the technical specialists;

�� Incorporates the outputs of the community consultation which occurred as part of the EES, although separate to the risk assessment process. The values and outcomes of the community consultation were incorporated to inform the risk assessment process; and

�� The EES considers a Reference Project as one possible solution. Under the Project Company model for project delivery, the implemented project will almost certainly differ from the Reference Project. For this reason, residual risk could not be comprehensively assessed.

4.2.2 Risk Assessment Methodology

The risk assessment approach used a multi-disciplinary group of technical specialists to identify and assess risks through a series of risk workshops. To assess risks consistently, a risk matrix was developed, defining the level of risk posed by project activities in terms of their ‘credible worst case’ consequence and the likelihood of that consequence occurring.

Levels of consequence for different assets and beneficial uses were clearly defined, from negligible to extreme, in terms of magnitude, space and time. A level of consequence was determined for each risk, taking into consideration all controls that would be in place to minimise or avoid the risk and having regard to ‘reasonable worst- case scenarios’.

Likelihood rankings were defined, from rare to certain, to describe the likelihood of the selected consequence occurring (note: this applies to the likelihood of that consequence occurring and not the likelihood of the activity occurring). The defined level of consequence and likelihood were used to form the risk matrix and assign a level of risk, ranging from low to critical, to each identified environmental effect.

The definition for the level of consequence for each asset or beneficial use was developed specifically for the Desalination Project based on consultation and advice from the technical specialists. The likelihood table was developed to incorporate the EES scoping requirements for the Desalination Project.

The consequence levels, likelihood levels and risk matrix relevant to this study are shown in Table 16, and Table 17 respectively.

A more detailed explanation of the risk assessment methodology is provided in the Victorian Desalination Project - Environmental Risk Assessment.

The risk outputs relevant to this report are presented in the following section


Tabl

e 16

C

onse

quen

ce ra

nkin

gs

Con

sequ

ence

Lev

el

1 –

Neg

ligib

le

2 –

Min

or

3 –

Mod

erat

e

4 –

Maj

or5

– Ex

trem

e

Cat

egor

y S

ub C

ateg

ory

Min

imal

impa

ct in

a

loca

lised

are

a w

ithin

nat

ural

va

riabi

lity

Low

impa

ct in

a

loca

lised

or

regi

onal

are

a w

ith a

func

tiona

l re

cove

ry w

ithin

le

ss th

an 1

yea

r

Med

ium

impa

ct

in a

loca

lised

or

regi

onal

are

a w

ith a

func

tiona

l re

cove

ry o

f 1 to

5

year

s

Hig

h Im

pact

in a

lo

calis

ed o

r re

gion

al a

rea

with

a fu

nctio

nal

reco

very

with

in 5

to

10

year

s

Ver

y H

igh

impa

ct

in a

regi

onal

are

a w

ithfu

nctio

nal

reco

very

in g

reat

er

than

10

year

s if

at

all

Env

ironm

enta

l E

cosy

stem

Func

tion

(n

eed

to c

onsi

der

resi

lienc

e &

re

sist

ance

)

Alte

ratio

n or

di

stur

banc

e to

ec

osys

tem

in

tera

ctio

ns in

the

loca

lised

are

a, if

an

y, u

nlik

ely

to b

e de

tect

able

& w

ithin

ex

pect

ed n

atur

al

seas

onal

var

iatio

n /

occu

rrenc

e.

Alte

ratio

n or

di

stur

banc

e to

ec

osys

tem

in

tera

ctio

ns in

the

loca

lised

are

a or

re

gion

al a

rea,

may

be

det

ecta

ble

but

with

in e

xpec

ted

natu

ral a

nnua

l va

riatio

n /

occu

rrenc

e.

Func

tiona

l re

cove

ry w

ithin

le

ss th

an 1

yea

r.

Alte

ratio

n or

di

stur

banc

e to

ec

osys

tem

in

tera

ctio

ns in

the

loca

lised

are

a or

re

gion

al a

rea,

de

tect

able

but

w

ithin

exp

ecte

d na

tura

l sho

rt-te

rm

varia

tion

/ oc

curre

nce.

Func

tiona

l re

cove

ry w

ithin

1 to

5

year

s.

Alte

ratio

n or

di

stur

banc

e to

ec

osys

tem

in

tera

ctio

ns in

the

loca

lised

are

a or

re

gion

al a

rea,

de

tect

able

and

be

yond

exp

ecte

d na

tura

l var

iatio

n /

occu

rrenc

e.

Func

tiona

l re

cove

ry w

ithin

5 to

10

yea

rs.

Alte

ratio

n or

di

stur

banc

e to

ec

osys

tem

in

tera

ctio

ns in

the

regi

onal

are

a,

subs

tant

ially

be

yond

exp

ecte

d na

tura

l var

iatio

n /

occu

rrenc

e to

irr

ever

sibl

e

Func

tiona

l re

cove

ry in

gre

ater

th

an 1

0 ye

ars

if at

al

l.

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D

esal

inat

ion

Proj

ect

Fina

l Im

pact

Ass

essm

ent f

or S

urfa

ce W

ater

, Hyd

rolo

gy a

nd W

ater

way

Cro

ssin

gs fo

r the

Tra

nsfe

r Pip

elin

e

Faun

a &

Flo

ra

Com

mun

ities

&

Spe

cies

Loss

of i

ndiv

idua

ls

not a

ppar

ent a

nd

with

out r

educ

tion

in

loca

lised

popu

latio

n vi

abilit

y

(e.g

. mor

talit

y lik

ely

to b

e no

gre

ater

th

an p

opul

atio

n ex

perie

nces

with

in

natu

ral a

nnua

l va

riabi

lity)

.

Loss

of s

mal

l nu

mbe

r of

indi

vidu

als

with

out

redu

ctio

n in

vi

abili

ty o

f po

pula

tion

in th

e lo

calis

ed a

rea

or

regi

onal

are

a. (

eg.

mor

talit

y lik

ely

to

be n

o gr

eate

r tha

n po

pula

tion

expe

rienc

es w

ithin

na

tura

l ann

ual

varia

bilit

y).

Func

tiona

l re

cove

ry w

ithin

le

ss th

an 1

yr.

Loss

of i

ndiv

idua

ls

lead

s to

redu

ctio

n in

via

bilit

y of

po

pula

tion

in th

e lo

calis

ed a

rea

or

regi

onal

are

a.

Func

tiona

l re

cove

ry w

ithin

1 to

5

year

s.

Loss

of l

arge

nu

mbe

r of

indi

vidu

als

lead

s to

a

high

impa

ct o

n po

pula

tions

in th

e lo

calis

ed a

rea

or

regi

onal

are

a.

Func

tiona

l re

cove

ry w

ithin

5 to

10

yea

rs.

Long

-term

impa

ct

on p

opul

atio

ns in

th

e re

gion

al a

rea

that

may

not

be

reco

vera

ble

Func

tiona

l re

cove

ry in

gre

ater

th

an 1

0 ye

ars

if at

al

l.

Soc

ial

Am

enity

(Phy

sica

l Fa

ctor

s, e

g N

oise

, A

ir an

d W

ater

etc

)

Tem

pora

ry

loca

lised

impa

cts

on a

men

ity –

no

last

ing

effe

cts.

Sho

rt te

rm im

pact

s on

am

enity

to th

e lo

calis

ed a

rea

or

regi

onal

are

a.

Func

tiona

l re

cove

ry w

ithin

le

ss th

an 1

yea

r.

Impa

cts

on a

men

ity

to th

e lo

calis

ed

area

or r

egio

nal

area

that

ne

gativ

ely

alte

r pe

rcep

tions

of t

he

area

.

Func

tiona

l re

cove

ry w

ithin

1 to

5

year

s.

Impa

cts

on a

men

ity

to th

e lo

calis

ed

area

or r

egio

nal

area

that

si

gnifi

cant

ly

nega

tivel

y al

ter

perc

eptio

ns o

f the

ar

ea.

Func

tiona

l re

cove

ry w

ithin

5 to

10

yea

rs

Am

enity

of t

he

regi

onal

are

a pe

rman

ently

ne

gativ

ely

alte

red.

Func

tiona

l re

cove

ry in

gre

ater

th

an 1

0 ye

ars

if at

al

l

5231

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D

esal

inat

ion

Proj

ect

Fina

l Im

pact

Ass

essm

ent f

or S

urfa

ce W

ater

, Hyd

rolo

gy a

nd W

ater

way

Cro

ssin

gs fo

r the

Tra

nsfe

r Pip

elin

e

Tabl

e 17

Li

kelih

ood

Ran

king

s

Like

lihoo

dD

escr

iptio

n

A –

Rar

eH

ighl

y un

likel

y to

occ

ur b

ut th

eore

tical

ly p

ossi

ble.

B –

Unl

ikel

yM

ay o

ccur

with

in th

e lif

e of

the

proj

ect.

C –

Lik

ely

Like

ly to

occ

ur m

ore

than

onc

e du

ring

the

life

of th

e pr

opos

ed D

evel

opm

ent.

D –

Alm

ost C

erta

inV

ery

likel

y to

occ

ur w

ithin

a 1

2 m

onth

tim

efra

me.

Inc

lude

s pl

anne

d ac

tiviti

es. E

nviro

nmen

tal,

Soc

ial &

E

cono

mic

des

crip

tion

incl

udes

the

perio

d du

ring

cons

truct

ion.

E –

Cer

tain

Will

occu

r as

a re

sult

of th

e D

esal

inat

ion

proj

ect c

onst

ruct

ion

&/o

r ope

ratio

ns.

5331

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D

esal

inat

ion

Proj

ect

Fina

l Im

pact

Ass

essm

ent f

or S

urfa

ce W

ater

, Hyd

rolo

gy a

nd W

ater

way

Cro

ssin

gs fo

r the

Tra

nsfe

r Pip

elin

e

Tabl

e 18

R

isk

Ass

essm

ent M

atrix

Con

sequ

ence

s Li

kelih

ood

1 –

Neg

ligib

le

2 –

Min

or3

– M

oder

ate

4

– M

ajor

5 –

Ext

rem

e

A –

Rar

eL

LL

MH

B –

Unl

ikel

y

LL

MM

H

C –

Lik

ely

LM

MH

H

D –

Alm

ost C

erta

inM

MH

HC

E –

Cer

tain

M

MH

CC

L =

Low

M =

Med

ium

H =

Hig

h

C =

Crit

ical

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D

esal

inat

ion

Proj

ect

Fina

l Im

pact

Ass

essm

ent f

or S

urfa

ce W

ater

, Hyd

rolo

gy a

nd W

ater

way

Cro

ssin

gs fo

r the

Tra

nsfe

r Pip

elin

e

Tabl

e 19

C

onst

ruct

ion

Phas

e Im

pact

s

Proj

ect A

ctiv

ity

Spec

ific

Impa

ct

Rec

epto

r C

ontr

ols

Con

seq

uenc

eLi

kelih

ood

Ris

kR

ank

Miti

gatio

n an

d M

anag

emen

t

Ear

thw

orks

- br

each

of f

lood

le

vees

and

ba

nks

Alte

ratio

n of

flow

re

gim

es a

nd fl

ood

exte

nts

of a

ll m

ajor

w

ater

way

s re

duci

ng a

men

ity

durin

g w

et p

erio

ds

Soc

ial -

A

men

ityR

efer

to s

peci

fic

miti

gatio

n re

quire

men

ts

for e

ach

asse

t loc

atio

n w

ithin

det

aile

d re

port

and

in a

ccor

danc

e w

ith

Mel

bour

ne W

ater

re

quire

men

ts.

Mod

erat

eU

nlik

ely

ME

DIU

M

Con

stru

ctio

n ac

ross

wat

erw

ays

Con

stru

ctio

n ac

ross

wat

erw

ays

dam

agin

g or

di

stur

bing

sur

face

w

ater

eco

syst

ems

Env

ironm

ent

Des

ign

optio

n (tr

ench

/ tu

nnel

/ ov

erla

nd) t

o en

sure

min

imal

impa

ct.

Mod

erat

e1

Unl

ikel

y M

ED

IUM

Cat

chm

ent

Man

agem

ent

Aut

horit

ies

requ

irem

ents

Con

stru

ctio

n of

B

oost

er P

ump

Sta

tion

with

in

LSIO

Alte

ratio

n of

flow

re

gim

es

Soc

ial -

A

men

ityM

inim

ise

dura

tion

of

cons

truct

ion

activ

ities

, ke

ep s

poil

heap

s an

d m

achi

nery

, site

she

ds

etc

outs

ide

of th

e LS

IO.

Und

erta

ke a

ny fl

ood

miti

gatio

n m

easu

res

prio

r to

cons

truct

ion

of

the

Boo

ster

Pum

p S

tatio

n.

Mod

erat

eU

nlik

ely

ME

DIU

M

5531

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2

D

esal

inat

ion

Proj

ect

Fina

l Im

pact

Ass

essm

ent f

or S

urfa

ce W

ater

, Hyd

rolo

gy a

nd W

ater

way

Cro

ssin

gs fo

r the

Tra

nsfe

r Pip

elin

e

Proj

ect A

ctiv

ity

Spec

ific

Impa

ct

Rec

epto

r C

ontr

ols

Con

seq

uenc

eLi

kelih

ood

Ris

kR

ank

Miti

gatio

n an

d M

anag

emen

t

Ear

thw

orks

and

st

ockp

iling

Sed

imen

tdi

scha

rge

to

wat

erw

ays

resu

lting

fro

m s

oil e

rosi

on o

r sp

oil f

rom

ea

rthw

orks

, im

pact

ing

on

surfa

ce w

ater

ec

osys

tem

s

Env

ironm

ent

Spe

cific

det

ails

for e

ach

wat

erw

ay c

onta

ined

w

ithin

"Im

pact

A

sses

smen

t of t

he

Wat

erw

ay C

ross

ings

for

the

Tran

sfer

Pip

elin

e"

repo

rt.

Min

or1

Unl

ikel

y LO

W

Con

stru

ctio

n of

B

oost

er P

ump

Sta

tion

acro

ss

flood

plai

n

Con

stru

ctio

n ac

ross

floo

dpla

in

dam

agin

g or

di

stur

bing

sur

face

w

ater

eco

syst

ems

Env

ironm

ent

Con

stru

ctio

n pr

actis

es in

ac

cord

ance

with

EP

A

Gui

delin

es fo

r Maj

or

Con

stru

ctio

n S

ites

(199

6) a

nd C

onst

ruct

ion

Tech

niqu

es fo

r Sed

imen

t P

ollu

tion

Con

trol (

EP

A

1991

). S

elec

ting

site

s to

m

inim

ise

the

need

to

dive

rt su

rface

flow

s.

Min

orU

nlik

ely

LOW

1.

Ass

esse

d in

Fau

na a

nd F

lora

Rep

ort

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2

D

esal

inat

ion

Proj

ect

Fina

l Im

pact

Ass

essm

ent f

or S

urfa

ce W

ater

, Hyd

rolo

gy a

nd W

ater

way

Cro

ssin

gs fo

r the

Tra

nsfe

r Pip

elin

e

Proj

ect A

ctiv

ity

Spec

ific

Impa

ct

Rec

epto

r C

ontr

ols

Con

sequ

enc

eLi

kelih

ood

Ris

kR

ank

Miti

gatio

n an

d M

anag

emen

t w

ater

eco

syst

ems

trans

ferr

ing

and

stor

ing

mat

eria

ls, s

torm

wat

er

man

agem

ent s

yste

ms

with

isol

atio

n an

d te

mpo

rary

sto

rage

ca

pabi

litie

s, a

ppro

pria

te

hand

ling

and

clea

nup

proc

edur

es.

Oth

er

requ

irem

ents

with

re

spec

t to

hand

ling

and

stor

age

of c

hem

ical

s as

de

fined

by

the

T&E

team

an

d re

leva

nt le

gisl

atio

n.

1.

Ass

esse

d in

Fau

na a

nd F

lora

Rep

ort

5831

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D

esal

inat

ion

Proj

ect

Fina

l Im

pact

Ass

essm

ent f

or S

urfa

ce W

ater

, Hyd

rolo

gy a

nd W

ater

way

Cro

ssin

gs fo

r the

Tra

nsfe

r Pip

elin

e

4.2.3 Risk assessment outcomes

It was concluded that during construction phase of the project medium risk activities are likely to include earthworks activities, construction across waterways and construction of a Booster Pump Station within LSIO. Earthworks and stockpiling and construction of the Booster Pump Station across the floodplain are considered to be low risk. During operation phases the Booster Pump Station may pose a medium risk, while Booster Pump Station onsite storage are likely to pose a low risk. These risks have been considered with appropriate controls in place. This section provides a basis for discussing these risks.

Earthworks - Disruption to levee banks Floodplains are the low-lying areas adjacent to rivers, creeks or drainage channels and can be inundated following heavy rainfall in the catchment. Several main waterway crossings will occur within the flat floodplain areas of the Koo-we-rup area. Levee banks are constructed around many of these waterways to protect adjacent public and private property from flooding activities. Disruption of these levee banks during construction may undermine the structural integrity of the levee banks and cause flooding to surrounding land.

The consequences of such an event are considered to be moderate as flooding events may affect the amenity of the local area and could potentially result in emotional and financial burden. It is considered unlikely that the impacts will be moderate as appropriate construction methods and management techniques should be implemented to avoid disruption to the levee. It will be a Melbourne Water requirement that permits for works on waterways be approved prior to construction. If appropriate construction and mitigation measures are undertaken in accordance with Melbourne Water requirements it is unlikely that there would be a significant impact on social amenity.

Construction across waterways

The Transfer Pipeline will cross waterways by either trenching or pipe jacking. The impacts of both trenching and pipe jacking are discussed in Section 5. Pipe jacking and Trenching can potentially have either direct or indirect impacts on the waterway (Section 5). Pipe jacking has been recommended for sites where there are high waterway values or where it is deemed that reinstatement would not be adequate if trenching was undertaken (Section 6.7). As a result of a combination of construction technique and appropriate mitigation (Section 6) at each waterway crossing, it is unlikely that construction across waterways will result in detrimental harm to the waterway. Appropriate crossing methods and mitigation plans will need to be developed in conjunction with the appropriate Catchment Management Authority.


Construction of the Booster Pump Station Construction of the booster pump station within the floodway has the potential to obstruct floodwaters if this activity coincides with a significant flood. Should this occur flood water may be redistributed.

There is a likelihood of a significant flood event occurring during construction. Without adequate mitigation works or controls this may result in a moderate impact due to marginally higher flood levels. The higher flood levels could have an impact on houses, agricultural land, and infrastructure upstream and adjacent to the Booster Pump Station.

The potential impacts are unlikely to occur if the following controls are implemented during construction:

�� Minimise the duration of construction activities;

�� Undertake any flood mitigation measures such as local reshaping between the edge of the Pump Station and the high ground to provide additional floodway capacity prior to construction of the Booster Pump Station; and

�� Minimise the construction footprint within the LSIO e.g. keep spoil heaps, machinery, site sheds and other obstructions outside of the LSIO.

Even with these control measures in place the consequence of flooding occurring during construction is moderate. Additional mitigation measures such as relocating the booster pump station to higher ground outside the LSIO may reduce the risk event further.

Operation of the Booster Pump Station As described above, the operation of the Booster Pump Station has the potential to alter flood flow regimes and increase flooding which may damage houses and other infrastructure.

Without adequate mitigation, constructing the Booster Pump Station within the LSIO would alter the flooding characteristics of the area by obstructing flood flows and increasing flood levels. The Booster Pump Station at this location would obstruct the deeper portion of the LSIO (approximately 1 metre deep), which may result in increases to flood levels upstream of the Booster Pump Station site. By obstructing this portion of the LSIO, floodwaters will be redistributed to the southwest. Increases in flows to the southwest would result in marginally higher flood levels.

To attain a permit to construct within the LSIO, the relevant authority will require control measures (probably as outlined in Section 6). With these controls in place, the likelihood of flooding impacts resulting from the booster pump station is rare. However the consequence of social and economic impacts would still be significant and has hence been considered as moderate. Hence the overall risk of increasing flood damage to houses is considered low.

Additional mitigation measures such as relocating the booster pump station to higher ground outside the LSIO may reduce the risk event further.


4.3 Detailed Waterway Risk Assessment A waterway specific risk assessment was undertaken for each waterway crossed by the Proposed Transfer Pipeline Alignment (Appendix E).

During this specific waterways risk assessment for the Desalinisation Project, sediment transport and flooding have been identified as the most important risk factors posing a threat to waterways during both construction and operation phases of the Project. The risk assessment considered the following scenarios: Specific impact 1: Sediment Transport risks associated with trenching;

�� Specific impact 2: Sediment Transport risks associated with pipe jacking;

�� Specific impact 3: Flooding risks associated with trenching; and

�� Specific impact 4: Flooding risks associated with pipe jacking.

Sediment Transport Risk Sediment can enter waterways as the result of erosion and sediment works within the vicinity of waterways. Sediment transport is used here as a general term to describe a range of factors including:

1. Erosion potential (e.g. bed, bank and floodplain erosion) which can provide a source of sediment to waterways;

2. Sediment conveyance (i.e. transport of sediment within water body); and

3. Sedimentation (i.e. deposition of sediments) locally and downstream.

Sediment transport risk is the result of a combination of the following factors:

�� Waterway type;

�� Catchment topography (position within the catchment);

�� Longitudinal profile (channel slope);

�� Soil cohesiveness (stability);

�� Catchment area;

�� Land management (fencing and land clearance); and

�� Site management of construction activities.


Sediment Transport Consequence The factors which may potentially affect sediment transport consequence are as follows:

�� Environmental value of the receiving waterway and presence of environmentally significant areas: The consequence has considered the environmental value of the receiving waterway systems in terms of waterway and water quality conditions (documented in the Regional River Health Strategies). The receiving waterway system has been considered in terms of both the value of the immediate waterway and the overall catchment system and point of discharge from the catchment outlet (eg Westernport Bay). It is noted Westernport Bay coastline is a RAMSAR site (wetlands of international significance) and therefore erosion is considered to have a higher impact when a crossing occurs within a channel that discharges into Westernport Bay. Waterbodies with permanent water have typically been assumed to be of higher environmental value than other waterways. Further assessment of consequence will need to be undertaken when site visits, aquatic ecological investigations and flora/fauna investigations are completed.

�� Catchment topography: If erosion occurs in steep hill areas the consequence of sediment transport is likely to be higher. Disturbance at this point within the landscape may enhance erosion processes by undermining the stability within the catchment and triggering active erosion process upstream. This could result in significant erosion in an upstream direction (headward erosion) and can provide a significant source of sediment resulting in sedimentation downstream. This can generally be avoided by appropriate reinstatement (see Section 5).

�� Location and angle at which the Transfer Pipeline cuts across the channel: If the Transfer Pipeline were to cut through the banks on an active bend (i.e. where natural erosive processes occur) erosion may be increased resulting in additional sediment transport which may cause altered channel planform (channel shape from an aerial perspective).

Sediment Transport Likelihood The factors which act as indicators of sediment transport likelihood ratings are:

�� Channel Slope: Sediment transport capacity is higher in steeper channels compared with flatter channels.

�� Waterway type and condition: The waterway classification type as described in Section 2.3, as well as site specific observations regarding waterway condition and bank stability

�� Soil cohesiveness: Soil cohesiveness will affect the likelihood of erosion occurring. Further investigation is required to confirm soils at each location. This will be undertaken within the scope of other specialist reports


�� Catchment area; Large catchments will have higher flows and a higher potential for sediment transport.

Flooding Risk Flooding risk is broadly determined by a combination of the following factors:

�� Catchment size relative to conveyance and the potential to restrict flow due to construction activity; and

�� Asset and property locations relative to existing waterways, floodplains and LSIO.

Flooding risk is a result of a combination of flooding consequence and likelihood as described below.

Flooding Consequence The factors that may affect flooding consequence are:

�� Asset and property locations relative to existing waterways and floodplains This includes the location of roads, private and public property; and

�� Potential to cause hazardous conditions.

Where the location of assets and private or public property is within close proximity to waterways the consequence to flooding may be increased. Similarly, the number of assets and/or specific landuse may also determine the flooding consequence for a particular waterway crossing.

Flooding Likelihood Flooding likelihood is affected by the following factors:

�� Duration of construction:

The duration of works will vary depending upon the difficulty of construction at each waterway crossing. Possible duration of construction has been considered when determining a flooding likelihood rating. Whilst flood events cannot be predicted at any one time a longer duration of work will have an increased likelihood of being affected by a high flow event.

�� Size of the upstream catchment relative to capacity of temporary diversion works:

Larger catchments have a greater potential to produce flow events that may exceed the bank full capacity of the channel in the location of works and affect the ability of temporary diversions to cope with stream flow and maintain safe and practical working conditions.

and

�� Topography, including channel and floodplain geometry (shape).

Total channel capacity is a function of channel geometry and longitudinal profile. Evidence of an active floodplain may increase the likelihood rating for flooding risk.


Risk Assessment Methodology A typical risk assessment methodology was undertaken which aligned with the multidisciplinary whole Project risk assessment completed as part of the scope of the EES. (The definitions for consequence aligned with those presented within Section 4.1, however likelihood definitions were modified slightly to reflect potential impacts during construction and operation phases of the Project (Table 21).

The outcomes from this process are based upon information available at the time of writing and may evolve over time as further investigation is undertaken. Thus, this risk analysis cannot be deemed as final.

Risk assessment was undertaken based upon the assumptions that appropriate controls, i.e. mitigation measures, will be implemented (refer Section 5).

Soil degradation is considered for the purposes of this project to include bed, bank and floodplain erosion potential. This risk assessment has taken this factor into account, however further assessment of the risks associated with soil degradation including, acid sulphate soils, compaction, sedimentation, slope failure, subsidence and soil erodability is considered within Rosengren (2008).

Table 21 Likelihood Rankings

Likelihood Description

A – Rare Highly unlikely to occur but theoretically possible.

B – Unlikely May occur within the life of the Project or duration of construction.

C – Likely Likely to occur more than once during the life of the Reference Project or construction period.

D – Almost Certain

Very likely to occur within a 12 month timeframe which includes construction and a 12 month defect liability period. Includes planned activities. Environmental, Social & Economic description includes the period during construction.

E – Certain Will occur as a result of the Desalination Project construction &/or operations.


4.3.1 Risk Assessment Conclusions

A specific Risk Assessment (Environmental Risk and Impact Assessment) has been undertaken for each of the waterway crossings in accordance with the consistent methodology applied throughout the Project. This risk assessment is based upon the current knowledge gained through field investigations (in areas where land access approval has been provided) and/or aerial photo analysis. The key risks for the Transfer Pipeline are associated with the construction of the Transfer Pipeline across the waterways with the main construction methodologies of trenching through the waterway or pipe jacking (a form of tunnelling) under the waterways to be considered. This assessment was initially applied at a broad level and has been included within the overall risk register for the Project. The typical potential impacts associated with these construction methods have been outlined below.

In considering the existing conditions of the waterways crossed by the Transfer Pipeline, and impacts from the construction methods, a preliminary assessment has also been applied. This assessment has been applied at a site-specific level for each identified waterway crossing focusing on risks associated with erosion/sedimentation transportation and flooding. The approach has been to determine a consequence assessment for the erosion and flooding impacts, and to then assign a likelihood rating to the occurrence of the impact at the assigned consequence level.

For this assessment, the following summarises the general conclusions:

�� Risks are most likely to affect construction phases of the Project, which includes both construction and the defect liability period;

�� Operation phase risks may occur, for example, if a headward erosion migrates upstream or the channel migrates towards the path of the Transfer Pipeline infrastructure;

�� Several Waterway crossings have higher risk of sediment transport due to existing stability issues and waterway conditions;

�� Large, generally named, waterways have higher risk of sediment transport during trenching methods of construction; and

�� Waterways within the Bass Catchment, generally have higher risk of erosion.


5. Impacts of Transfer Pipeline

5.1 Introduction The primary purpose of this section is to fulfil the requirements outlined within the following objectives

�� Assess the potential for adverse effects of the proposed alignment on the hydrology, water quality and character of local waterways, floodplains and drainage paths, including in relation to floodway function;


Comments:

ImpactAssessment

Section 5.2: Construction Impacts

This section discusses the potential impacts on the surface water environment of the Transfer Pipeline alignment

5.2 Available Construction Techniques There are a number of available methods for constructing waterway crossings, depending on environmental and engineering constraints. The two most common methods of waterway crossings are open cut trenching (with or without flow diversion) and pipe jacking (a form of tunnelling). The preferred crossing method is determined following the consideration of a number of site specific factors including safety risk, hydrology, stream substrate and geology, environmental sensitivities and engineering feasibility (APIA 2005).

It is understood that the construction methods being considered for the Transfer Pipeline will be either trenching or pipe jacking. This discussion on risk mitigation and recommendations of risk management measures assumes that one of these methods will be used at each waterway crossing. A summary of these methods is provided below.

5.2.1 Trenching

Standard open cut trenching is most often utilised in low flow, shallow or dry conditions. This technique involves setting up a stable work platform on each side of the watercourse and then excavating a trench. The trench is not completed until immediately prior to placement of the pipeline. All welding and coating of the pipeline is conducted in a cleared area away from the waterway embankment before placement. Tie in points are located on high ground away from the banks. Pre-welded pipes are then placed into the trench using slings from the excavators at either side of the waterway. The spoil from the watercourse bed and bank and trench spoil material are kept separate.


This crossing method may be applied in sensitive streams where rapid construction is considered the best means of minimising environmental impacts. The primary risk of impact associated with trenching is the potential for release of high sediment loads during excavation and backfilling. If managed inappropriately, it could increase turbidity, impacting upon downstream water quality. Mitigation measures to reduce the environmental impact of trenching include, flow diversion, sediment capture devices and strict environmental management controls.

Where higher water volumes and flows are present, open trenching using streamflow diversion can be used. This technique will typically involve creating a dry construction area within which to work by pumping around the area. Other diversion techniques include diverting the water flow through a flume pipe installed between the dams. Diverted flow is maintained at a flow rate and water quality, which will allow the downstream reaches of the waterway to continue to function.

This construction method is most commonly used at waterway crossings where the natural flow regime is required to maintain environmental, social or engineering objectives.


Figure 5-1 Standard Trenching Pipeline Construction


Figure 5-2 Standard trenching construction with flow diversion in place

5.2.2 Pipe Jacking

Pipe jacking is a method of tunnel construction where hydraulic jacks are used to push specially made pipes through the ground behind a tunnel boring machine or shield. This technique is commonly used to create tunnels under existing natural or man-made structures, such as roads or railways or rivers.

This option provides added flexibility with the timing of works as pipe jacking under the crossing can occur when flows remain in waterways and it avoids the need to divert or dam flows. However consideration of the ground conditions and clearance requirements below the site specific waterway invert level is important in assessing the suitability of this technique.

The decision between open trenching and pipe-jacking may be based on engineering reasons, or on the need to prevent environmental impacts associated with construction.

Some key points about pipe jacking are:

�� The sleeve pipe is jacked from a jacking pit on one side of the waterway, to a receival pit on the other side of the waterway;

�� The jacking and receival pits will be substantial structures made of reinforced concrete or sheet piling;


�� The jacks in the jacking pit are used to push the sleeve pipe into a cavity excavated ahead of the progressing pipe; the excavation would be by a tunnel-boring machine. The work follows a repetitive sequence of excavation ahead of the sleeve pipe, pushing the sleeve pipe into the excavated cavity, and removing the spoil by muck carts running on rails inside the sleeve pipe back to the jacking pit;

�� Ground conditions determine the viability of pipe-jacking. Variable conditions make steering difficult. Squeezing clays and running sands increase soil/pipe friction and jacking loads, and can require stabilisation of the ground ahead of the sleeve pipe by grout or chemical injection from the surface; and

�� Pipe-jacking poses additional technical risks and complexity for the construction

5.3 Potential Impacts The following list of potential impacts of each construction technique is based on previous experience in waterway construction management and a desktop assessment of the likely impacts that may occur on each of the waterways along the Transfer Pipeline alignment. However, this list should not be deemed as definitive, and individual waterway crossings should undergo a site inspection to assess the potential impacts of construction on each site.

5.3.1 Direct Impacts

TrenchingPotential impacts that can occur as a direct result of trenching construction methods include:

�� Disturbance to bed and banks;

�� Disturbance to floodplains;

�� Stream bed degradation;

�� Stream bank degradation;

�� Scour potential from poor pipeline orientation:

– The impact of erosion from bed and bank disturbance can include water quality impacts on the downstream environment. General construction activities (e.g. stockpiling of material, etc.) may lead to sedimentation issues;

�� Change to natural channel planform;

�� Impacts to natural flow regime;

�� Impacts to riparian and aquatic flora and fauna; and

�� Disturbances or loss of native vegetation (including seedbank, instream and riparian vegetation).


Pipe-jacking Potential impacts associated with pipe jacking include:

�� Disturbance to floodplains;

�� Disturbances or loss of native vegetation (including seedbank and riparian vegetation);

�� Failure of pipe jacking leading to a collapsed hole and lost tools with possible additional land requirements for subsequent attempts;

�� Seepage of slurry mud into land and the watercourse; and

�� Washout of cavities and collapse of easement.

These direct impacts are dependent on the soil conditions and depth requirements imposed at site-specific locations. The suitability of pipe jacking will need to consider the geotechnical conditions at each site.

It is noted that in general, impacts on riparian flora and fauna and disturbance to or loss of native riparian vegetation will be less for pipe jacking than for trenching given the reduced footprint of disturbed riparian areas at ground level and the setback from the riparian zone of the waterway.

5.3.2 Indirect Impacts

Indirect impacts to waterways that can occur from either method if inappropriately managed during the construction phase include:

�� Soil erosion caused by ground disturbance;

�� Water quality impacts such as sedimentation and sediment transport associated with inadequate site controls;

�� Impacts to water quality from construction vehicle fuels, oils and greases (although it is noted that given the setback from the top of banks of the waterway, these impacts will generally be less for pipe jacking techniques);

�� Introduction and spread of weed species from construction vehicles and machinery; and

�� Visual impacts of construction equipment.

5.3.3 Booster Pump Station Construction

The Booster Pump Station (BPS) is located adjacent to Cardinia Drain, in a designated Land Subject to Inundation Overlay (LSIO) area. The footprint of the Booster Pump Station extends approximately 60 m into a 100 m wide band of LSIO that is bounded by the Levee and high ground to the south.


Construction of the booster pump station will involve site-levelling, construction of a hardstand area, provision of access tracks and trenching and backfilling for equipment and structure foundations. This work will require the use of earth moving equipment, trucks, mobile cranes and transport vehicles and will likely require approximately 1 hectare of cleared area and the construction of a 6 metre wide gravel access track.

Impacts associated with the construction of the booster pump station may affect the surface water environment. In addition, siting of the booster pump station within an LSIO has the potential to alter flow regimes and/or damage or disturb surface water ecosystems.

Generally, the potential impacts include alteration of flow regimes, sediment from construction site runoff, construction fuels, oils and other chemicals entering waterways.

The impact on these nearby waterways is likely to be similar to impacts associated with other development construction activity.

The Construction of the BPS will occur over 12-18 months and during that time activities may obstruct the floodway. Obstruction of the floodway during construction will reduce the floodplain volume currently available. As a result, if a major flood occurs during the construction period, the level of the floodwaters will rise higher than they would normally, and therefore expand the inundation area. During the construction period, runoff from storm events may produce the same water surface elevations in the floodplain as currently experienced in slightly larger events, thus the frequency of flooding events may also increase. Natural surface elevations indicate the expansion of floodwaters is likely to occur in a south-westerly direction. The expanded extent and height of floodwaters may impact on houses, agricultural land, and infrastructure upstream and adjacent to the BPS.

5.3.4 Booster Pump Station Operation

During operation the BPS will obstruct the floodway and may cause an increase in flooding events as outlined for construction activity. During operation of the BPS it is likely that onsite storage of fuels, oils or chemicals will occur. A significant rainfall event may produce runoff that mobilises fuels, oils, contaminated sediments and other chemicals into waterways.


6. Risk Mitigation

6.1.1 Introduction

The primary purpose of this section is to fulfil the requirements outlined within the following objectives:

�� Detail the proposed measures, including the choice of proposed alignment and construction technique as well as the management and timing of works, to minimise adverse effects of construction on the functions and values of waterways, floodplains and drainage paths; and

�� Describe proposed measures to rehabilitate affected sections of waterways, floodplains and drainage paths following the proposed alignment construction works.


Comments:

Section 6.2: Standard Management Measures

This section discusses the range of measures commonly used to mitigate potential impacts to surface water

Section 6.3: Construction Management Measures

This section discusses appropriate construction management mitigation measures

Section 6.4: Operational Management Measures

This section discusses the measures to be addressed during operation phases

Mitigation

Section 6.5: Specific Mitigation Measures

This section discusses measures that may be required to further minimise impacts.

Section 6.6:Application of Mitigation and Management Measures

This section discusses the application of mitigation measures based upon waterway type.

Section 6.7:Implications of Risk Assessment

This section discusses the basis for determining an appropriate construction method.

Section 6.8: Booster Pump Station Operation and Construction Mitigation

This section discusses BPS operation and construction phase mitigation measures.


6.2 Standard Management Measures A range of measures is commonly used to mitigate potential impacts on the surface water environment. These are discussed below and incorporate recommendations from the following references:

�� Guidelines for Assessment of Applications for Permits and Licences for Works on Waterways, (SKM 2001);

�� Guidelines for Stabilising Waterways - Standing Committee on Rivers and Catchments, Victoria, (DSE 1991);

�� Technical Guidelines for Waterway Management, (DSE, 2007a);

�� Water Transfer Pipelines Design Requirements (Draft), (Melbourne Water, 2008b);

�� Australian Pipeline Industry Association Code of Environmental Practice – Onshore Pipelines (APIA, 2005);

�� EPA Publication 480 Best Practice Environmental Management: Environmental Guidelines for Major Construction Sites (EPA, 1996);

�� EPA Publication 275 Construction Techniques for Sediment Pollution Control (EPA, 1991); and

�� Urban Stormwater: best practice environmental management guidelines (CSIRO, 1999).

It is anticipated that an Environmental Management Framework (EMF) including an Environmental Management Plan (EMP) will be established prior to the construction of the Transfer Pipeline. The EMF and EMP should address site management and sediment controls in terms of water quality issues in the context of the SEPP (Waters of Victoria) requirements.

The SEPP aims to provide a coordinated approach for the protection of the health of Victoria’s water environments. Regarding construction activities the SEPP states, “Construction works need to be managed to minimise land disturbance, soil erosion and the discharge of sediments and other pollutants to surface waters.” Construction managers are therefore required to implement effective management practices consistent with requirements as outlined in the EPA publications listed above. The SEPP also states, where construction activities cross or adjoin surface waters, construction managers are required to monitor affected surface waters to make an assessment as to the protection of the beneficial uses.

The consequence on the receiving waterway may vary depending on the waterway value from an ecological perspective. However, with many of waterways discharging to the Westernport Bay, it is possible that the requirements may default to becoming more stringent in recognition the RAMSAR wetland status of the coastal waters of Westernport Bay (irrespective of the status of the waterway being directly affected). In order to demonstrate compliance with SEPP requirements, a pre, during and post construction monitoring program is typically required as part of an EMP.


Section 6.3 outlines a list of typical construction management measures that are likely to be included as part of the standard conditions set within the Works on Waterways Permit issued by the CMA. These measures are typically undertaken during waterways construction works to minimise the impact on the receiving environment. The risk assessment and associated recommendations have been based on the expectation that construction of the Project will include these standard construction activity and site management measures. Any such EMP should not be limited to the mitigation measures listed herein.

6.3 Construction Management Measures �� Erosion and sediment control measures in accordance with the EMF should be

established prior to construction:

– The impact of erosion can include water quality impacts on the downstream environment. General construction activities (eg. stockpiling of material, etc.) may lead to sedimentation issues, and these requirements should be managed or addressed via the EMF;

– The EMF should describe requirements or measures for the Project Company to avoid or minimise the adverse impact of construction activities on the environment including demonstrating compliance with SEPP requirements;

�� Erosion and sediment control measures should be regularly inspected, particularly following rainfall events, to ensure their ongoing functionality;

�� Minimising disturbance through appropriate construction methodology;

�� Ensuring that all excavations are properly rehabilitated so that the potential scour is minimised for a range of flow conditions;

�� Vegetation clearance should be avoided where possible. If clearance cannot be avoided, the area of vegetation cleared at any one time should be minimised;

�� Reinstatement of vegetation as quickly as practicable;

�� All stockpiled material should be stored in bunded areas and kept remote from waterways;

�� Top soils should be stockpiled separately to subsoils;

�� Soils should be reinstated in the order in which they were removed;

�� Creation and maintenance of designated construction equipment wash down and refuelling areas outside the riparian zone of the waterway with established bunding and contamination control measures in place;

�� Waterway crossings should be avoided during periods of heavy rainfall and flooding;

�� Contingency plans to address heavy rainfall and flood events during construction should be included in the EMF. The contingency plan should address:

– Limiting stormwater entering excavation areas;

– Enhancement of controls when heavy rain is forecast;


– Siting of facilities;

– Clean up procedures;

– A flood warning system;

– Procedures for limiting loss of spoil and other hazardous materials; and

– Notification of authorities.

6.4 Specific Mitigation Measures In addition to the standard management requirements that would be expected during construction, the following section provides further detail on mitigation measures more specific to the expected activities associated with the construction of the Transfer Pipeline. In part these project specific measures encompass standard best practice waterway management, however this list emphasises the type of requirements that may be imposed to further minimise the impact on the environment, depending on the type of waterway that is at risk.

Minimise Site Disturbance Actions to be taken to avoid site-based disturbance during the construction period should include:

�� Minimising the width and effective footprint of works;

�� Controlling the route used by machinery into and out of the works site;

�� Avoiding the need for access of heavy machinery to the bed of the waterways as works should be undertaken from the top of the banks where possible; and

�� Disturbance by machinery or works of the banks surrounding the site should be avoided.

�� Wash down areas should be placed at key entry and exit points;

Crossing Alignment Preferably, crossing should occur on a straight portion of the waterway to avoid the risk of erosion. Where this is not possible bank stability works should be implemented in accordance with Guidelines for Stabilising Waterways- Standing Committee on Rivers and Catchments, (DSE, 1991) and Technical Guidelines for Waterway Management (DSE 2007a) To avoid adverse environmental impacts it is recommended that the Transfer Pipeline should cross the waterway perpendicular to the direction of flows. This is particularly relevant for channels with defined bed and banks and should form part of the EMF.

Placement of clean rock for working platform Where construction is to occur on a waterway with active flow, an area of clean graded rock should be constructed to provide a stable platform for construction vehicles to work from and minimise the transport of sediment into the downstream waterway.


Streamflow diversion measures Where higher water volumes and flows are present, streamflow diversion should be in place. This technique will typically involve creating a dry construction area within which to work by pumping around the area. Other diversion techniques include diverting the water flow through a flume pipe installed between the dams.

Diverted flow should be maintained at a flow rate and water quality, which will allow the downstream reaches of the waterway to continue to function.

Diversion drains and bunds for water management Diversion drains should be established during construction works to manage site runoff and minimise the transport of sediment from the construction site into the waterway.

Weed Management GHD recommends that weed management measures be implemented within the EMF for the construction phase to: (a) prevent the introduction of additional weeds into the site; and (b) control any weeds that establish at the site during the soil disturbance associated with construction. In addition, the WMP is needed for on-going control of weeds at the site during the post construction phase of the project.

Revegetation �� Revegetation plans should consider the benefits vegetation can provide in

promoting bank stability;

�� Any areas of native vegetation disturbed by the construction of the Transfer Pipeline should be revegetated following completion of the works. These revegetation works should be included in the Project in addition to any revegetation works that may be proposed in a Net Gain Offset Plan, where required;

�� Revegetation works should be conducted in accordance with DSE guidelines: Revegetation Planting Standards (DSE 2006).

�� Any revegetation works should adhere to defined DSE standards (DSE 2006). These standards include meeting a number of minimum establishment and on-going management requirements as part of a 10-year management plan. These include guidelines for:

– Site protection (e.g. fencing) and site preparation (weed control, mulching);

– Planting design (plant densities relative to EVA benchmarks);

– Source of planting stock (locally indigenous);

– Planting options and schedule; and

– Post-planting maintenance (e.g. weed control).

Structural Stabilisation Works Bed control structures, rock riprap (beaching) and armouring can be used as a means of providing bed and bank protection where vegetation will not provide the required stability. Stabilisation works should be conducted in accordance with Guidelines for Stabilising Waterways- Standing Committee on Rivers and Catchments, (DSE, 1991).


It is noted this document has recently been supplemented by Technical Guidelines for Waterway Management (DSE 2007a).

Rock Rip Rap Rock riprap is used for bank protection works where required for works that may impact on local bank stability.

The rock riprap should extend upstream and downstream from the trench to protect the banks and should match with the existing stream profile. If construction of the Transfer Pipeline occurs on a bend, more extensive riprap protection would be required. The rock riprap should cover approximately two-thirds of the bank height. The upper third can be stabilised by using vegetation. For additional bank toe protection, the use of larger rock keyed into the existing bank toe should be undertaken. The larger placed rocks can protrude slightly from the bed and bank surface to promote habitat value.

Bed Control Structures or Armouring Bed protection may be required following trenching through some larger channels or those prone to bed instability. The pipe should be laid below the hard invert and the trench should be backfilled and protected with a layer of graded rock. Any grade control structure would need to be designed to maintain the hydraulic capacity of the waterway.

Waterway Rehabilitation Opportunities For some waterways where the CMA is looking to improve the waterway condition to achieve longer-term strategic objectives within the catchment, there may be opportunities to apply rehabilitation measures over a larger “whole-of-reach” scale. Therefore, there may be some waterways where rehabilitation associated with trenching could be combined with whole-of-reach bed and bank rehabilitation and enhancement. The consideration of the opportunities in consultation with the CMA may influence the outcome on the accepted construction methodology.

6.5 Operational Management Measures Additional requirements may need to be addressed during the operational phase of the Project in order to minimise the impact on the surface water environment: These may include:

�� Monitoring of the downstream bed stability of the waterway;

�� Design recommendations informed by the geotechnical investigation to address the potential for differential settlements in areas containing soft or compressible soil types;

�� The restriction of inspection access in sensitive areas (eg. waterways) to foot as much as possible; and

�� All inspections portals, valves, etc. are not installed in the vicinity of the waterway crossings as they may be inundated during periods of high flow.


6.6 Application of Mitigation and Rehabilitation Measures In Section 2 a list of common waterway types has been defined. Based on these waterway classifications, the following section outlines typical mitigation and rehabilitation methods for each of the waterway types. Local issues or processes identified pre-construction may lead to other additional mitigation measures more specific to the individual waterway crossing.

Unconfined Sinuous Waterway - Mitigation and Management Measures

�� Standard management measures;

�� Minimise site disturbance;

�� Crossing waterway perpendicular to alignment;

�� Placement of clean rock for working platform;

�� Streamflow diversion measures;

�� Diversion drains and bunds for water management;


�� Reinstate excavated profile;

�� Fencing;

�� Rehabilitation of banks;


�� Bed control structures; and

�� Rock rip rap placement on banks.

Unconfined Channelised Waterway - Mitigation and Management Measures �� Standard Management Measures;





�� Avoid levee banks;

�� Possible construction of temporary levee banks;

�� Weed Management;


�� Levee Bank reinstatement; and

�� Revegetation.

Partially confined Sinuous Waterway - Mitigation and Management Measures �� Minimise site disturbance;





�� Resinstate excavated profile; and


Confined Headwater Channel – Mitigation and Management Measures �� Standard management measures;






�� Bed control structures.

Valley Fill – Mitigation and Management Measures �� Standard management measures;



�� Reinstate excavated profile; and


Farm/Road Drain – Channelised – Mitigation and Management Measures �� Standard management measures;





Farm Dam– Mitigation and Management Measures �� Standard management measures;




�� Weed Management;




6.7 Implications of Risk Assessment for Construction Methodology at Waterway Crossings

The risk assessment process has provided a basis for determining an appropriate construction methodology for each waterway crossing. The risk assessment as outlined in Section 4.2 has been considered for both trenching and pipe jacking. The key risks are associated with the construction of the Transfer Pipeline across the waterways for the construction methodologies of open cut trenching through the waterway or tunnel pipe jacking under the waterways.

The appropriate construction methodology draws upon the outcomes of the risk assessment, and should encompass the recommendations outlined within Section 6.4.

In working through the risk assessment for all identified waterway crossings, the interpretation of the outcomes is summarised below:

�� The associated risk for pipe jacking is either equivalent to or less than the associated risk for trenching (without any specific information regarding the soil conditions);

�� The risk assessment for sediment transport has informed the construction methodology, and indicated where additional mitigation measures are required to reduce the sediment transport risk; and

�� The risk assessment associated with flooding has indicated where additional mitigation measures are required to reduce the flooding risks and associated impacts.

The risk assessment is essentially informing the project on appropriate construction methods and determining where trenching is considered acceptable or where pipe jacking is recommended for consideration. Therefore the interpretation of the risk assessment associated with the trenching methodology in accordance with the following has informed the appropriate construction methodology:

�� Where the associated risk for trenching has been assessed as low, trenching construction methods are deemed to be acceptable. It is noted this is typically on the basis of the consequence being assessed as “insignificant to minor”, and/or the likelihood of occurrence typically “unlikely”; and

�� Where the associated risk for trenching has been assessed as medium, the construction methodology will be in accordance with the following:

– Pipe Jacking, if the implementation of additional mitigation measures does not reduce the risk;

– Trenching, where implementation of specific mitigation measures can reduce the risk.


For the waterway crossings with medium risk where trenching is considered acceptable, the application of the mitigation and rehabilitation measures will be in accordance with the typical measures as summarised according to the waterway types outlined in Section 5.5. It is noted site specific mitigation measures and construction methods recommended for consideration for each of the relevant waterway crossings are outlined where appropriate in the summary proformas (Appendix D). It is expected that local issues or processes identified pre-construction may also lead to other additional mitigation measures more specific to the individual waterway crossing. It is noted the Project Company will need to demonstrate mitigation controls and rehabilitation methods and site management mitigation controls in accordance with methods outlined to reduce the risk.

�� Where the associated risk has been assessed as high to critical, pipe jacking is the preferred and recommended construction method. It is noted there are some locations where if the alignment is moved, the risk could potentially reduce and trenching may become acceptable.

Table 22 outlines the number of waterway crossings where pipe jacking construction should be recommended for consideration.

For the nominated locations for pipe jacking, there may be some waterways where rehabilitation associated with trenching could be combined with whole-of-reach bed and bank rehabilitation and enhancement. As indicated, there are also some locations where if the alignment is moved, the risk could potentially reduce and trenching may become acceptable. Furthermore, for other locations subject to findings of further assessment or consultation there may be opportunities for trenching activities to be combined with strategic improvement works over a greater length of waterway.

Table 22 Waterway crossings where pipe jacking should be considered#

Waterway Name Waterway Crossing Number

Rationale for Pipe Jacking Recommendation

Powlett River 105

Extent of pipe-jacking operation needs to be considered in the context of ~2 km of pipe length within floodplain. Trenching not acceptable. The Powlett River is a complex tidally influenced river.

Bridge Creek 119

Pipe jacking across waterway channel required. Further consideration of appropriate launch/retrieval due to alignment of creek adjacent to construction easement

Gorge Creek 229 MWC identified*

Trib 3305 230 MWC identified*


83


Waterway Name Waterway Crossing Number

Rationale for Pipe Jacking Recommendation

Tennent Creek 231

MWC identified* -Trenching may provide an opportunity to improve waterway value with appropriate rehabilitation

Bass River 224 Trenching not acceptable

Trib 3831 329 Trenching acceptable if alignment moved east

approximately 150m.

Adams Creek 424

Ecological values to be confirmed, but trenching may provide an opportunity to improve waterway value with appropriate rehabilitation

Lower Lang Lang River 425 Levees and major channel conveyances

Yallock Cut and Levee 526 Levees and major channel conveyances

Yallock Creek/Yallock Outfall Drain 508, 509

Potential for trenching if able to avoid refuge pools and areas of high habitat value

Southern Boundary Drain 510 MWC Identified* – Relatively large catchment and drain with levee (to be confirmed)

Bunyip river Main Drain, South East Catchment Drain, North West Catchment Drain

514, 515, 535

Levees and major channel conveyances

McDonald’s Catchment Drain 536, 537, 538 Levees and major channel

conveyances

Cardinia Drain, Cardinia Catchment Drain 621, 622 Levees and major channel

conveyances

Lower Toomuc Creek and Deep Creek, Lower Deep Creek Drain, Lower Gum Scrub

542, 543, 544, 545

Levees and major channel conveyances

Ti Tree Creek 620

MWC Identified* – However, further investigation required to clarify flora and fauna values and flow status. Current investigation undertaken when flows were significantly altered by adjacent construction activities.

# The waterway crossings where pipe jacking has been considered will need to be confirmed with the relevant CMA.

From the above summary, the number of expected pipe jacking construction operations is 17, and will include crossing of 26 of the identified waterway crossings. There are seven locations where the closely spaced waterway alignments would be expected to be pipe jacked in a single launch and retrieve pipe jack operation.

It is noted additional crossings identified by MWC where they consider pipe jacking to be preferred have been indicated (*) in the above table. Further assessment or demonstration of the accepted mitigation and/or rehabilitation methods would be required if trenching is to be considered.

In discussions with the MWC and WGCMA it is understood that unless the EES determines that the open cut trenching is acceptable, pipe jacking will generally be the preferred construction methodology. From correspondence with MWC open cut trenching may be considered acceptable on minor creek tributaries with low environmental value and small drains and depressions, and pipe jacking will be the preferred method of construction for major and/or environmentally significantwaterways. From a Contractor’s perspective, the preferred method of construction would typically be open cut trenching in terms of both cost and construction period for the works.

The risk assessment as documented has provided an independent basis for determining the waterway crossings where pipe jacking is recommended and where open cut trenching is considered to be acceptable. It is noted ongoing consultation with CMAs will be required in terms of determining in principle agreement on the accepted construction methodology of the waterway crossings, and the specific requirements associated with a Works on Waterway permit for the construction of the crossings.

Other Recommendations It is recommended that the pipeline alignment be moved to the East approximately 150 m within the vicinity of waterway crossing 329. Site assessment at this waterway crossing highlighted that the pipeline asset may be undermined if the alignment is not altered. This site has low environmental values and as such was not given a high risk rating when considering sediment transport risk. However, due to the active nature of the waterway bank erosion is likely to cause migration of the stream channel in the direction of the pipeline. As a result the transfer pipeline could become exposed if the alignment is not modified accordingly.

6.8 Booster Pump Station Operation and Construction Mitigation

Construction The BPS is currently located within the LSIO which may increase the flood extent (section 5.3.3). In order to construct the booster pump station within an LSIO, a permit will need to be obtained from the relevant floodplan management authority. Possible mitigation methods to offset the impacts of obstructing the floodway and meet Melbourne Water requirements may include:

�� Streamlining and minimising the footprint of the booster pump station site, and/or


�� Local reshaping between the edge of the Pump Station and the high ground to provide additional floodway capacity.

Additional to these are the following standard controls that would be implemented during construction:

�� Minimise the duration of construction activities;

�� Undertake any flood mitigation measures such as local reshaping between the edge of the Pump Station and the high ground to provide additional floodway capacity prior to construction of the Booster Pump Station; and

�� Minimise the construction footprint within the LSIO e.g. keep spoil heaps, machinery, site sheds and other obstructions outside of the LSIO.

An alternative option to the above is to relocate the booster pump station to higher ground outside of the flood path and therefore, avoiding the LSIO.

Operation To reduce the impact of a flooding event on the BPS and surrounding stakeholders, appropriate flood design measures prior to construction of the BPS should be considered. Measures such as streamlining and minimising the area occupied by the BPS within the LSIO, and reshaping the ground between the BPS and the high ground to provide a path for floodwaters should be implemented to avoid an increase to the flooding extent. If possible the BPS should be relocated to high ground outside the LSIO.


86

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Des

alin

atio

n P

roje

ct

Fin

al I

mpa

ct A

sses

smen

t fo

r S

urfa

ce W

ater

, H

ydro

logy

and

Wat

erw

ay

Cro

ssin

gs f

or th

e T

rans

fer

Pip

elin

e

6.9

Per

form

ance

Req

uir

emen

ts

The

Per

form

ance

Req

uire

men

ts (

PR

’s)

are

inco

rpor

ated

into

the

En

viro

nmen

tal M

anag

emen

t Fra

mew

ork

and

embo

dy th

e re

com

men

datio

ns o

f en

viro

nmen

tal m

anag

emen

t aris

ing

from

the

envi

ronm

enta

l im

pact

and

ris

k as

sess

men

t pro

cess

. T

he s

peci

fic P

R's

rel

evan

t to

this

stu

dy a

rea

are

pres

ente

d be

low

.

Tab

le 2

3

T

imin

g

Su

bje

ct

D&

C

Act

iviti

es

O&

M

Act

iviti

es

Ob

ject

ive

Per

form

ance

Cri

teri

a P

erfo

rman

ce R

equ

irem

ents

Wat

erw

ays

and

Wet

land

s

Pro

tect

w

ater

way

s an

d w

etla

nds.

Com

ply

with

the

Sta

te

Env

ironm

ent P

rote

ctio

n P

olic

y (W

ater

s of

Vic

toria

).

No

sign

ifica

nt im

pact

on

Wes

tern

Por

t Ram

sar

site

. M

aint

ain

the

envi

ronm

enta

l va

lues

of w

ater

way

s an

d w

etla

nds.

C

ompl

ianc

e w

ith a

ll re

leva

nt

Aut

horit

y re

quire

men

ts fo

r w

ater

way

cro

ssin

gs.

Com

ply

with

the

Per

form

ance

Crit

eria

. D

evel

op a

nd im

plem

ent c

onst

ruct

ion

met

hods

and

site

reh

abili

tatio

n pl

ans

that

see

k to

pro

tect

the

habi

tat v

alue

s of

wat

erw

ays

and

wet

land

s in

clud

ing:

•

Dev

elop

ing

appr

opria

te c

onst

ruct

ion

met

hods

to m

inim

ise

envi

ronm

enta

l im

pact

s fo

r cr

ossi

ng s

ensi

tive

wat

erw

ays

such

as:

•

Pow

lett

Riv

er

• B

ridge

Cre

ek

• W

ools

hed

Cre

ek

• B

ass

Riv

er

• Lo

wer

Lan

g La

ng R

iver

•

Yal

lock

Cut

•

Yal

lock

Cre

ek

• B

unyi

p R

iver

•

McD

onal

ds C

atch

Dra

in

• D

eep

Cre

ek

• T

oom

uc C

reek

•

Car

dini

a C

reek

•

Ten

nant

Cre

ek

87

31/2

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1/ 3

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572

Des

alin

atio

n P

roje

ct

Fin

al I

mpa

ct A

sses

smen

t fo

r S

urfa

ce W

ater

, H

ydro

logy

and

Wat

erw

ay

Cro

ssin

gs f

or th

e T

rans

fer

Pip

elin

e

T

imin

g

Su

bje

ct

D&

C

Act

iviti

es

O&

M

Act

iviti

es

Ob

ject

ive

Per

form

ance

Cri

teri

a P

erfo

rman

ce R

equ

irem

ents

Ref

er to

PR

Sen

sitiv

ity A

reas

– P

lant

Are

a, P

R S

ensi

tivity

Are

as –

Tr

ansf

er P

ipel

ine

- She

et 1

, 2, 4

, 5 a

nd 6

and

PR

Sen

sitiv

ity A

reas

–

Nor

ther

ly G

rid C

onne

ctio

n - S

heet

1, 2

, 4, 5

and

7 in

Tec

hnic

al A

ppen

dix

5.

• S

ite s

peci

fic c

onst

ruct

ion

met

hods

to m

inim

ise

envi

ronm

enta

l im

pact

s in

clud

ing

eros

ion,

sed

imen

tatio

n an

d po

llutio

n

• R

eins

tatin

g an

d re

vege

tatin

g di

stur

bed

area

s •

Lim

iting

impa

ct o

n ec

olog

ical

pro

cess

es s

uch

as fi

sh m

ovem

ents

and

br

eedi

ng

Dev

elop

and

impl

emen

t mon

itorin

g an

d re

port

ing

on th

e ef

fect

s of

co

nstr

uctio

n on

wat

erw

ays

and

wet

land

s.

Dev

elop

and

impl

emen

t met

hods

and

man

agem

ent s

yste

ms

to li

mit

impa

cts

on w

ater

way

s an

d w

etla

nds

durin

g op

erat

ion.

R

e-es

tabl

ishm

ent o

f wet

land

(un

nam

ed tr

ibut

ary

of th

e P

owle

tt R

iver

) on

th

e D

esal

inat

ion

Pla

nt s

ite.

Dev

elop

mai

nten

ance

and

em

erge

ncy

man

agem

ent p

lans

for

the

Tra

nsfe

r P

ipel

ine

whi

ch m

eet t

he P

erfo

rman

ce C

riter

ia.

Des

ign

and

loca

te s

cour

and

oth

er r

elie

f val

ves

to m

eet t

he P

erfo

rman

ce

Crit

eria

.

89

31/2

2446

1/ 3

/147

572

Des

alin

atio

n P

roje

ct

Fin

al I

mpa

ct A

sses

smen

t fo

r S

urfa

ce W

ater

, H

ydro

logy

and

Wat

erw

ay

Cro

ssin

gs f

or th

e T

rans

fer

Pip

elin

e

T

imin

g

Su

bje

ct

D&

C

Act

iviti

es

O&

M

Act

iviti

es

Ob

ject

ive

Per

form

ance

Cri

teri

a P

erfo

rman

ce R

equ

irem

ents

Sur

face

W

ater

Q

ualit

y

Pro

tect

an

d m

aint

ain

surf

ace

wat

er

qual

ity.

Min

imis

e im

pact

s on

sur

face

w

ater

qua

lity.

C

ompl

y w

ith S

tate

E

nviro

nmen

t Pro

tect

ion

Pol

icy

(Wat

ers

of V

icto

ria).

A

chie

ve th

e U

rban

S

torm

wat

er B

est P

ract

ice

Env

ironm

enta

l Man

agem

ent

Gui

delin

es p

erfo

rman

ce

obje

ctiv

es d

urin

g co

nstr

uctio

n an

d op

erat

ion.

C

ompl

y w

ith E

PA

Bes

t P

ract

ice

Env

ironm

enta

l M

anag

emen

t –

Env

ironm

enta

l Gui

delin

es fo

r M

ajor

Con

stru

ctio

n S

ites

(199

6).

Sto

rmw

ater

trea

tmen

t sy

stem

is to

be

fully

in

tegr

ated

into

the

over

all

deta

il de

sign

of t

he

Des

alin

ated

Wat

er S

uppl

y S

yste

m a

nd in

clud

e sp

ill

man

agem

ent i

nfra

stru

ctur

e to

pro

tect

sur

face

wat

er

qual

ity.

Com

ply

with

the

Per

form

ance

Crit

eria

. D

evel

op a

nd im

plem

ent c

onst

ruct

ion

met

hods

and

man

agem

ent s

yste

ms

that

see

k to

mai

ntai

n su

rfac

e w

ater

qua

lity

cons

iste

nt w

ith S

tate

E

nviro

nmen

t Pro

tect

ion

Pol

icy

(Wat

ers

of V

icto

ria)

and

EP

A B

est P

ract

ice

Env

ironm

enta

l Man

agem

ent –

Env

ironm

enta

l Gui

delin

es fo

r M

ajor

C

onst

ruct

ion

Site

s (1

996)

. D

esig

n an

d co

nstr

uct T

empo

rary

Wor

ks to

isol

ate

cons

truc

tion

runo

ff fr

om c

atch

men

t run

off a

nd tr

eat i

t prio

r to

dis

char

ge to

rec

eivi

ng

wat

erw

ays.

E

stab

lish

a su

rfac

e w

ater

qua

lity

mon

itorin

g (in

clud

ing

repo

rtin

g) p

rogr

am

for

the

Pow

lett

Riv

er, i

n th

e vi

cini

ty o

f the

Des

alin

atio

n P

lant

Site

in

cons

ulta

tion

with

the

EP

A.

Man

age

mai

nten

ance

to a

void

rel

ease

of w

ater

with

che

mic

al

conc

entr

atio

ns a

bove

Sta

te E

nviro

nmen

t Pro

tect

ion

Pol

icy

(Wat

ers

of

Vic

toria

) ob

ject

ives

.

Tim

ing

Subj

ect

D&

CA

ctiv

ities

O

&M

A

ctiv

ities

O

bjec

tive

Perf

orm

ance

Crit

eria

Pe

rfor

man

ce R

equi

rem

ents

Haz

ardo

us

Mat

eria

ls

and

Dan

gero

us

Goo

ds

��

Pro

tect

bene

ficia

l use

s of

air,

land

, w

ater

, hum

an

and

envi

ronm

enta

l he

alth

, fro

m th

e im

pact

s of

ha

zard

ous

mat

eria

ls &

da

nger

ous

good

s.

Man

age,

sto

re, h

andl

e an

d di

spos

e an

y ha

zard

ous

subs

tanc

es a

nd d

ange

rous

go

ods

in a

ccor

danc

e w

ith

rele

vant

pol

icie

s, re

gula

tions

an

d gu

idel

ines

incl

udin

g th

e V

icto

rian

Wor

kcov

er

Aut

horit

y an

d A

ustra

lian

Sta

ndar

d A

S19

40 S

tora

ge

and

Han

dlin

g of

Fla

mm

able

an

d C

ombu

stib

le L

iqui

ds,

EP

A B

est P

ract

ice

Env

ironm

enta

l Man

agem

ent

– E

nviro

nmen

tal G

uide

lines

fo

r Maj

or C

onst

ruct

ion

Site

s (1

996)

and

EP

A P

ublic

atio

n 34

7 –

(Bun

ding

Gui

delin

es).

Com

ply

with

the

Per

form

ance

Crit

eria

. D

evel

op a

nd im

plem

ent m

etho

ds a

nd m

anag

emen

t sys

tem

s (in

clud

ing

cont

inge

ncy

plan

s) th

at:

��Li

mit

the

on-s

ite a

nd o

n-ve

ssel

sto

rage

and

/or u

se o

f haz

ardo

us

subs

tanc

es a

nd d

ange

rous

goo

ds

��M

anag

e ha

zard

ous

mat

eria

ls a

nd d

ange

rous

goo

ds to

avo

id

envi

ronm

enta

l dam

age

��In

stal

l bun

ds (i

f app

ropr

iate

) and

take

pre

caut

ions

to re

duce

the

risk

of s

pills

ent

erin

g th

e st

orm

wat

er d

rain

age

syst

em

��S

eek

to c

onta

in a

ny s

pills

cap

ture

d by

the

stor

mw

ater

dra

inag

e sy

stem

��

Pro

vide

for m

anag

emen

t of h

ydro

carb

on s

pills

9131

/224

461/

3/1

4757

2

D

esal

inat

ion

Proj

ect

Fina

l Im

pact

Ass

essm

ent f

or S

urfa

ce W

ater

, Hyd

rolo

gy a

nd W

ater

way

Cro

ssin

gs fo

r the

Tra

nsfe

r Pip

elin

e

Tim

ing

Subj

ect

D&

CA

ctiv

ities

O

&M

A

ctiv

ities

O

bjec

tive

Perf

orm

ance

Crit

eria

Pe

rfor

man

ce R

equi

rem

ents

Site

Reh

abilit

ati

on�

�R

esto

re p

re-

cons

truct

ion

land

qua

lity

and

uses

.

All

dist

urbe

d la

nd

prog

ress

ivel

y re

inst

ated

: ��

In th

e ca

se o

f the

D

esal

inat

ion

Pla

nt, t

o th

e st

anda

rds

agre

ed

with

the

Sta

te��

In th

e ca

se o

f all

othe

r pr

ivat

e la

nd d

irect

ly

affe

cted

by

the

Pro

ject

A

ctiv

ities

, as

agre

ed

with

priv

ate

land

ow

ner

��In

the

case

of p

ublic

la

nd, a

s ag

reed

with

th

e pu

blic

land

m

anag

er

Pro

gres

sive

ly a

nd p

rior t

o its

dis

turb

ance

, con

duct

pre

-con

stru

ctio

n su

rvey

s of

the

land

with

in 5

0 m

etre

s of

the

Pro

ject

Are

a to

be

dist

urbe

d.

Dev

elop

a re

habi

litat

ion

plan

with

eac

h pr

ivat

e la

ndow

ner.

D

evel

op a

reha

bilit

atio

n pl

an to

add

ress

as

appl

icab

le:

��S

ite p

rote

ctio

n an

d si

te p

repa

ratio

n ��

Pla

ntin

g de

sign

incl

udin

g pl

ant d

ensi

ties

rela

tive

to E

VC

ben

chm

arks

��

Sou

rce

of p

lant

ing

stoc

k ��

Pos

t-pla

ntin

g m

aint

enan

ce

Dev

elop

a re

habi

litat

ion

plan

with

the

publ

ic la

nd m

anag

er to

add

ress

as

appl

icab

le:

��S

ite p

rote

ctio

n an

d si

te p

repa

ratio

n ��

Pla

ntin

g de

sign

incl

udin

g pl

ant d

ensi

ties

rela

tive

to E

VC

ben

chm

arks

��

Sou

rce

of p

lant

ing

stoc

k ��

Pos

t-pla

ntin

g m

aint

enan

ce

Iden

tify

area

s w

here

ther

e is

a ri

sk o

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7. Conclusions

The desalination Transfer Pipeline is approximately 85 km in length from the Desalination Plant to the Melbourne water supply system via Cardinia Reservoir. An assessment of the waterway crossing for the Transfer Pipeline alignment (Rev E) has included an assessment of the existing conditions and potential impacts at the waterway crossings, primarily associated with the construction of the Transfer Pipeline.

The Transfer Pipeline alignment crosses through seven main catchments and will cross 100 waterways, of which 17 are named waterways and 8 are named drains. Waterways within these catchments have undergone significant alteration as a result of land clearance and reclamation. Agricultural and urban landuses have enhanced sediment and contaminant levels within many of these waterways. The Western Port study (CSIRO Land and Water, 2003) indicated that both the Bunyip and Lang Lang catchments contribute significant amounts of sediment to Western Port each year. In addition Toomuc Creek, Deep Creek, Cardinia Creek and Powlett River exceeded SEPP guidelines for turbidity or suspended solids indicating that these catchments do receive some significant sediment inputs. IRC and ISC scores indicate that generally waterways are within moderate to poor condition. An exception is the Bass River which, while generally in moderate condition, has pockets of good condition.

A specific Risk Assessment (Environmental Risk and Impact Assessment) has been undertaken for the waterway crossings in accordance with the consistent methodology applied throughout the Project. This assessment was initially applied at a broad level that has been included within the overall risk register for the Project. The key risks for the Transfer Pipeline component of the Project are associated with the construction phase activities for the Transfer Pipeline works across the waterways. The construction methodologies considered are trenching through the waterway or tunnel pipe jacking under the waterways. The typical potential impacts associated with these construction methods have been outlined.

In considering the existing conditions assessment and impacts from the construction methods, an assessment has also been applied at a site-specific level for each identified waterway crossing focusing on risks associated with erosion/sedimentation and flooding only. The approach has been to determine a consequence assessment for the erosion and flooding impacts, and to then assign a likelihood rating to the occurrence of the impact at the assigned consequence level.

The preliminary consequence level for the erosion (Environmental) and flooding (Social) impacts at each waterway crossing considered the assessment of the existing conditions of the waterway crossing locations and overall systems as follows:

�� The waterway and water quality conditions of the receiving waterway systems (including Western Port Bay) in a broad context as documented in the Regional River Health Strategies for the CMA’s;

�� Geomorphic classification in terms of type of waterway and status of the current stability, and location within catchment and overall catchment area; and


�� The amenity and impact on the community in terms of flooding.

The preliminary likelihood ratings assigned to the consequence has been determined by considering the following:

�� Geomorphologic characterisation of the waterways including stream processes and susceptibility to erosion, including interpretation of channel slope and geometric features based on aerial photos and topographic information;

�� Hydrologic interpretation of some of the designated waterways in terms of seasonally varying flows and design peak flows (where stream flow information is available); and

�� Site conditions.

Soil degradation is considered for the purposes of this project to include bed, bank and floodplain erosion potential. Further assessment of the risks associated with soil degradation including, acid sulphate soils, compaction, sedimentation, slope failure, subsidence and soil erodability is considered within Rosengren (2008).

The proformas prepared for each waterway crossing has provided the basis of the risk assessment and determination of the risk rating. In drawing conclusions from the risk assessment for the Transfer Pipeline at the waterway crossings, this has led to the recommendation of the appropriate construction methodology as outlined below:

�� An assessment of the existing conditions of the waterways and determination of the risk ratings derived from the consequence levels and likelihood ratings and subsequent derived risk rating considering the following:

– Findings from field inspections at each crossing location including observations of stream processes and key features;

– Findings from and integration with other specialist studies including (but not limited to) Flora and Fauna (Aquatic ecology), Geotechnical and Groundwater;

– Subsequent advice and feedback from relevant specialists and responsible authorities;

�� Based on known available information, in considering both construction methodologies the pipe jacking approach typically results in an equivalent or lower risk ratings compared to the trenching methodology for both flooding and erosion impacts. It is noted this general conclusion may be altered by the additional information as it becomes available prior to design documentation and construction (i.e. Geotechnical information at the sites);

�� In considering the practical implications of both construction methods and on the basis of the risks associated with trenching being greater than or equivalent to the pipe jacking methodology. Therefore the interpretation of the risk assessment associated with the trenching methodology in accordance with the following has determined the appropriate construction methodology as summarised below:

– Where the associated risk for trenching has been assessed as low, trenching construction methods are deemed to be acceptable;


– Where the associated risk for trenching has been has been assessed as medium, the construction methodology will be in accordance with the following:

– Pipe Jacking, if the implementation of additional mitigation measures does not reduce the risk;

– Trenching, where implementation of specific mitigation measures can reduce the risk. It is noted the Project Company will need to demonstrate mitigation controls and rehabilitation methods and site management mitigation controls in accordance with methods outlined to reduce the rating; and

– Where the associated risk has been assessed as high to critical, pipe jacking is the preferred and recommended construction method.

For trenching the application of site specific mitigation measures for the relevant waterway crossings are outlined where appropriate in the summary proformas (Appendix D). It is expected that local issues or processes identified pre-construction may also lead to other additional mitigation measures more specific to the individual waterway crossing. It is noted the Project Company will need to demonstrate mitigation controls and rehabilitation methods and site management mitigation controls in accordance with methods outlined to reduce the risk.

For the nominated locations for pipe jacking, there may be some waterways where rehabilitation associated with trenching could be combined with whole-of-reach bed and bank rehabilitation and enhancement. As indicated, there are also some locations where if the alignment is moved, the risk could potentially reduce and trenching may become acceptable. The consideration of the opportunities in consultation with the authority may influence the outcome on the accepted construction methodology.

General Through consultation with Melbourne Water Corporation and West Gippsland Catchment Management Authority it is understood that the Project Company will be required to he undertake a site-specific assessment in coordination with the responsible authority once the alignment and details are finalised. The aim of site specific assessment with representatives from the CMA is to agree on the most practical approach in relation to construction within close proximity to waterways to meet the overall objectives in relation to the management of their waterways and the requirements as part of a Works on Waterways permit. In working through a risk assessment for each waterway appropriate site management controls and mitigation measures have been identified. These will need to continue to be developed prior to construction across waterways.

To confirm the recommendation for an acceptable construction method at each crossing location and appropriate constraints for the construction easement width the following will need to be considered:

�� Conclusions from other specialist studies including (but not limited to) Flora and Fauna (Aquatic ecology), Geotechnical, Cultural heritage and Groundwater; and

�� Subsequent advice and consultation with relevant specialists and responsible authorities (in particular the Catchment Management Authorities).


The development of more site-specific controls and mitigation measures in conjunction with the CMAs will be required for preparing works on waterway permits applications prior to construction.

Assessments in this report have been developed using design concept based on the current Project description (Version 9.0) and the current alignment (Rev E). The findings and recommendations contained in this report should only be used by suitably qualified and informed professionals.


8. References

APIA (2005) Code of Environmental Practice – Onshore Pipelines, Australian Pipeline Industry Association Ltd., October 2005

Biosis Research (2008) Desal Pipeline Existing Conditions & Impact Assessment, Wonthaggi to Cranbourne, Victoria, June 2008

Cardinia Shire Council (2007). Toomuc Creek Bushland Reserve Masterplan. Available From: http://www.cardinia.vic.gov.au/

CSIRO Land and Water (2003). The Western Port sediment study, [Online], (25 July 2008), Available From: http://www.clw.csiro.au/publications/consultancy/2003/Western_Port_Sediment_Study-Integration_and_Summary.pdf

Department of Sustainability and Environment (DSE) (2008b), Victorian Water Resources Data Warehouse, [Online], (24 Jul. 08), Available from: <http://www.vicwaterdata.net/vicwaterdata/data_warehouse_content.aspx?option=3>

DSE (1991), Guidelines for Stabilising Waterways - Standing Committee on Rivers and Catchments, Victoria, August 1991

DSE (2003), Western Port Ramsar Site Strategic Management Plan, Department of Sustainable Environment, July 2003

DSE (2006) Revegetation Planting Standards: A guide to establishing native vegetation for net gain accounting, Department of Sustainability and Environment Melbourne, 2006

DSE (2007a), Technical Guidelines for Waterway Management, 2007

DSE (2008a) Website of Department of Sustainable Environment; www.dse.vic.gov.au.

Earth Tech (2008). Geomorphic Overview of Waterways in the Bass River Catchment. Melbourne Water, April 2008.

Environment Protection Act 1970 s 16 (Waters of Victoria)

Environmental Protection Agency (EPA) (1998), The Health of Streams in the Western Port Catchment, EPA Publication 601, [Online], (25 July 2008), Available from: <http://epanote2.epa.vic.gov.au/EPA/Publications.NSF/515bc2fde7bf93f44a2565b6001ee896/4dd5c6576a24f3054a256608001ed8ce/$FILE/601.pdf>

Environmental Protection Authority Victoria (EPA Victoria) (2003), Water Quality Objectives For Rivers And Streams – Ecosystem Protection, Scientific Support and Freshwater Sciences, EPA Victoria, [Online], (25 July 2008), Available from: http://epanote2.epa.vic.gov.au/EPA/Publications.nsf/2f1c2625731746aa4a256ce90001cbb5/9f209aa11b9f7678ca256b19000e126f/$FILE/791.1.pdf


EPA (2002), Port Phillip Bay Water Quality: Long-Term Trends in Nutrient Status and Clarity, 1984 – 1999, Publication 806, June 2002, [Online], (31 July 2008), Available from: http://epanote2.epa.vic.gov.au/EPA/Publications.nsf/2f1c2625731746aa4a256ce90001cbb5/ee7555a3f6197f2eca256b350011b929/$FILE/806.pdf

EPA (1991), Construction Techniques for Sediment Pollution Control, Publication 275, May 1991

EPA (1996), Environmental Guidelines for Major Construction Sites, Publication 480, December 1996

EPA (1998) The Health of Streams in the Western Port Catchment, Publication 601, February 1998

Esso Australia Pty Ltd (2004). Bass Strait Environment Plan, December 2004, [Online], (31 July 2008), Available from: http://www.dpi.vic.gov.au/DPI/nrenmp.nsf/LinkView/DC9A03FBF4D002EDCA25747A000292168B3DA072DA032386CA2573DF001C56C6/$file/EP_Vic_L10.pdf

GHD (2007a) Supplementary Report on Geology, Geomorphology and Waterway Crossings, November 2007

Melbourne Water (2001) The Health of the Lang Lang River (Report prepared by Waterways Group, Melbourne Water), Melbourne

Melbourne Water (2003), Guidelines for Development within the Koo Wee Rup Flood Protection District, Melbourne Water, 2003

Melbourne Water (2006), Melbourne Water Social and Environmental Data 2005/2006 Rivers and creeks water quality monitoring, [Online], (25 Jul. 08), Available from:<http://www.melbournewater.com.au/applications/social_environment_report_2005_06/content/environmental_performance/rivers_and_creeks_water_quality_monitoring.asp#2>

Melbourne Water (2006a) Port Phillip and Westernport Regional River Health Strategy Addendum (Report prepared by Melbourne Water and the Port Phillip and Westernport Catchment Management Authority), Melbourne

Melbourne Water (2006b) Extension of Waterways Services Progress Report: Bass Coast and Islands Catchment, Melbourne

Melbourne Water (2007) Port Phillip and Westernport Regional River Health Strategy (Report prepared by Melbourne Water and the Port Phillip and Westernport Catchment Management Authority), Melbourne

Melbourne Water (2007), Annual Water Quality Fact sheets for Melbourne Water Water Quality Long Term Monitoring Sites. Jan –Dec 2006, [Online], (23 Jul. 08), Available from: <http://www.melbournewater.com.au/content/library/publications/reports/rivers_and_creeks_reports/Summary_Waterway_Water_Quality_Data_2006.pdf>


Melbourne Water (2008a) Waterways Water Quality Strategy: A Melbourne Water strategy to improve water quality in the Port Phillip and Westernport region

Melbourne Water Website (2008b), Website of Melbourne Water, www.melbournewater.com.au, 2008

Planning and Environment Act 1987 sect 12

Rosengren, N (1984). Sites of Geological and Geomorphological Significance in Westernport Bay Catchment. Publication number 401, Ministry for conservation, Victoria, Environmental Studies Series. Melbourne, Prepared for the Environmental Studies Division, Ministry for Conservation, Victoria. Department of Geography, University of Melbourne.

Rosengren, N. (2008). Desalination Project Transfer Pipeline. Impact and Risk Assessment: Geology, Geomorphology and Acid Sulphate Soils

Sandery, P.A. (2005). Towards an understanding of the flushing of Bass Strait, Presented at the Australian Institute of Physics 16th Biennial Congress 2005, [Online], (31 July 2008), Available from: http://aipcongress2005.anu.edu.au/Sandery_PA_AIP_AMOS_CD1.pdf

SKM (2001). Guidelines for assessment of Applications for Permits and Licences for Works on Waterways.

SRW Website (2007), Website of Southern Rural Water, www.srw.com.au, 2007

State Environmental Protection Policy (SEPP)(Waters of Victoria) Gazetted

Wallbrink, P., J., Olley, J.M. & Hancock, G.J. Olley, J.M., Hughes, A., P, P, I., Hunt, D., Rooney, G., Coleman, R. & Stevenson, J. (2003). The Western Port sediment study. Canberra, CSIRO Consultancy report.

Water Act 1989 div 4 part 10

Water Act 1989 s 188

West Gippsland Catchment Management Authority (2007a) http://www.wgcma.vic.gov.au

West Gippsland Catchment Management Authority (2007b) West Gippsland Regional Catchment Strategy

West Gippsland Regional River Health Strategy (2005) West Gippsland Regional Catchment Strategy


Appendix A

Pipeline Waterway Map Series (30 pages)


5 544

336

761

337

70

973

730

687

758

208

312

384

96

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48

977

313

210

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528

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976

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um: G

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Dep

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Proj

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00

6

1 3

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Tra

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Mer

cato

rH

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um: G

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Dat

um o

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tralia

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Dep

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A

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nE31

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June

200

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Dat

e

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SE;

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D; V

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61 3

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00

6

1 3

8687

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elm

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com

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w

ww.

ghd.

com

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0115

30

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of 3

005

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nd Cha

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371,0

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371,0

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372,0

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372,0

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5,739,000

5,739,000

5,740,000

5,740,000

G:\3

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cato

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um: G

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Dat

um o

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0115

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372,0

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374,0

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5,741,000

5,742,000

5,742,000

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1:10

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22 k

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21 k

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214

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231

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374,0

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375,0

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376,0

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5,743,000

5,743,000

5,744,000

5,744,000

5,745,000

5,745,000

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Mer

cato

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um: G

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199

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Dep

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Proj

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June

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EW

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0 Au

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00

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1 3

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com

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0115

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GRANTVILLE-GLEN ALVIE ROAD

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26 k

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25 k

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24 k

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23 k

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227

226

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224

375,0

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375,0

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376,0

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376,0

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377,0

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377,0

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5,745,000

5,745,000

5,746,000

5,746,000

5,747,000

5,747,000

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CAD

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Mer

cato

rH

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um: G

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Dat

um o

f Aus

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199

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f Aus

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Dep

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Proj

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A

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Num

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June

200

8

T F

EW

Dat

e

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GH

D; V

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elb

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0 Au

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61 3

868

7 80

00

6

1 3

8687

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elm

ail@

ghd.

com

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w

ww.

ghd.

com

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0115

30

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of 3

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28 k

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327

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301

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375,0

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375,0

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376,0

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376,0

00

377,0

00

377,0

00

378,0

00

378,0

00

5,747,000

5,747,000

5,748,000

5,748,000

5,749,000

5,749,000

G:\3

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um: G

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Dat

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Proj

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June

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00

6

1 3

8687

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elm

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com

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com

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0115

30

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377,0

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378,0

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378,0

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379,0

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5,749,000

5,749,000

5,750,000

5,750,000

5,751,000

5,751,000

G:\3

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um: G

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00

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00

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5,752,000

5,752,000

5,753,000

5,753,000

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nsve

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Mer

cato

rH

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l Dat

um: G

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Dat

um o

f Aus

tralia

199

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Proj

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Appe

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Num

ber

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200

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EW

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e

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30

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35 k

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373,0

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373,0

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374,0

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374,0

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375,0

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375,0

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5,754,000

5,754,000

5,755,000

5,755,000

G:\3

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CAD

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PE

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1:10

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010

020

030

040

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Met

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Map

Pro

ject

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Tra

nsve

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Mer

cato

rH

oriz

onta

l Dat

um: G

eoce

ntric

Dat

um o

f Aus

tralia

199

4G

rid: M

ap G

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f Aus

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, Zon

e 55

Dep

t of S

usta

inab

ility

& En

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e D

esal

inat

ion

Proj

ect

Appe

ndix

A

Job

Num

ber

Rev

isio

nE31

-224

21-0

6

June

200

8

T F

EW

Dat

e

Dat

a so

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: D

SE;

GH

D; V

icM

ap.

Cre

ated

by:

A L

ovel

l8/

180

Lons

dale

St M

elb

VIC

300

0 Au

stra

lia

61 3

868

7 80

00

6

1 3

8687

811

1

m

elm

ail@

ghd.

com

.au

w

ww.

ghd.

com

.au

0115

30

Shee

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nd Cha

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Cur

rent

Tra

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elin

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lignm

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ipel

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in E

xist

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ack

Cur

rent

Tra

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Alig

nmen

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383

318

289

389

317

392

157

663

476

441

362

BASS HIGHWAY

BAY

RO

AD

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MARRIOTT RISE

BASS HIGHWAY

CREEK 2504

RED BLUFF C

REEK

PEAC

OC

K R

OAD

DR

AIN

40 k

m

39 k

m

38 k

m

421

420

419

418

341

406

405

401

402

325

404

407

372,0

00

372,0

00

373,0

00

373,0

00

374,0

00

374,0

00

375,0

00

375,0

00

5,756,000

5,756,000

5,757,000

5,757,000

G:\3

1\22

421\

CAD

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IS\P

roje

cts\

PE

13-H

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logy

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MX

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or u

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1:10

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020

030

040

050

Met

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Map

Pro

ject

ion:

Tra

nsve

rse

Mer

cato

rH

oriz

onta

l Dat

um: G

eoce

ntric

Dat

um o

f Aus

tralia

199

4G

rid: M

ap G

rid o

f Aus

tralia

, Zon

e 55

Dep

t of S

usta

inab

ility

& En

viro

nmen

tTh

e D

esal

inat

ion

Proj

ect

Appe

ndix

A

Job

Num

ber

Rev

isio

nE31

-224

21-0

6

June

200

8

T F

EW

Dat

e

Dat

a so

urce

: D

SE;

GH

D; V

icM

ap.

Cre

ated

by:

A L

ovel

l8/

180

Lons

dale

St M

elb

VIC

300

0 Au

stra

lia

61 3

868

7 80

00

6

1 3

8687

811

1

m

elm

ail@

ghd.

com

.au

w

ww.

ghd.

com

.au

0115

30

Shee

t

of 3

014

Lege

nd Cha

inag

e (k

m)

Cur

rent

Tra

nsfe

r Pip

elin

e A

lignm

ent (

30m

)Tr

ansf

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ipel

ine

in E

xist

ing

Pip

e Tr

ack

Cur

rent

Tra

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)

Bas

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226

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157

392

476

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BASS HIGHWAY

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SOUTH GIPPSLA

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BASS HIGHWAY

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DR

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CREEK 2504

42 k

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41 k

m

422

40640

8

409

407

372,0

00

372,0

00

373,0

00

373,0

00

374,0

00

374,0

00

5,758,000

5,758,000

5,759,000

5,759,000

5,760,000

5,760,000

G:\3

1\22

421\

CAD

D\G

IS\P

roje

cts\

PE

13-H

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MX

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(inc

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age)

whi

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, inc

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for a

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1:10

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020

030

040

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Met

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Map

Pro

ject

ion:

Tra

nsve

rse

Mer

cato

rH

oriz

onta

l Dat

um: G

eoce

ntric

Dat

um o

f Aus

tralia

199

4G

rid: M

ap G

rid o

f Aus

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, Zon

e 55

Dep

t of S

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inab

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& En

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nmen

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e D

esal

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ion

Proj

ect

Appe

ndix

A

Job

Num

ber

Rev

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nE31

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21-0

6

June

200

8

T F

EW

Dat

e

Dat

a so

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: D

SE;

GH

D; V

icM

ap.

Cre

ated

by:

A L

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180

Lons

dale

St M

elb

VIC

300

0 Au

stra

lia

61 3

868

7 80

00

6

1 3

8687

811

1

m

elm

ail@

ghd.

com

.au

w

ww.

ghd.

com

.au

0115

30

Shee

t

of 3

015

Lege

nd Cha

inag

e (k

m)

Cur

rent

Tra

nsfe

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elin

e A

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30m

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in E

xist

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ack

Cur

rent

Tra

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)

Bas

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KETTLES ROAD

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BR

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45 k

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44 k

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43 k

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411

410

372,0

00

372,0

00

373,0

00

373,0

00

374,0

00

374,0

00

375,0

00

375,0

00

5,760,000

5,760,000

5,761,000

5,761,000

5,762,000

5,762,000

G:\3

1\22

421\

CAD

D\G

IS\P

roje

cts\

PE

13-H

ydro

logy

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Hyd

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Whi

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of a

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, tor

t or o

ther

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r any

exp

ense

s, lo

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, dam

ages

and

/or c

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(inc

ludi

ng in

dire

ct o

r con

sequ

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age)

whi

ch a

re o

r may

be

incu

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as

a re

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of th

e pr

oduc

t bei

ng in

accu

rate

, inc

ompl

ete

or u

nsui

tabl

e in

any

way

and

for a

ny re

ason

.

1:10

,000

010

020

030

040

050

Met

ers

Map

Pro

ject

ion:

Tra

nsve

rse

Mer

cato

rH

oriz

onta

l Dat

um: G

eoce

ntric

Dat

um o

f Aus

tralia

199

4G

rid: M

ap G

rid o

f Aus

tralia

, Zon

e 55

Dep

t of S

usta

inab

ility

& En

viro

nmen

tTh

e D

esal

inat

ion

Proj

ect

Appe

ndix

A

Job

Num

ber

Rev

isio

nE31

-224

21-0

6

June

200

8

T F

EW

Dat

e

Dat

a so

urce

: D

SE;

GH

D; V

icM

ap.

Cre

ated

by:

A L

ovel

l8/

180

Lons

dale

St M

elb

VIC

300

0 Au

stra

lia

61 3

868

7 80

00

6

1 3

8687

811

1

m

elm

ail@

ghd.

com

.au

w

ww.

ghd.

com

.au

0115

30

Shee

t

of 3

016

Lege

nd Cha

inag

e (k

m)

Cur

rent

Tra

nsfe

r Pip

elin

e A

lignm

ent (

30m

)Tr

ansf

er P

ipel

ine

in E

xist

ing

Pip

e Tr

ack

Cur

rent

Tra

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elin

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)

Bas

sGas

Raw

Gas

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SALISBURY STREET

ROSEBERY STREET

OLDBURY STREET

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COUR

T

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JAMES STREET

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JERSEY S

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LAN

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IVER

ADAM

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ADAMS CREEK SOUTH BRANCH

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47 k

m

46 k

m

45 k

m

423

424

417

411

413

412

416

372,0

00

372,0

00

373,0

00

373,0

00

374,0

00

374,0

00

5,762,000

5,762,000

5,763,000

5,763,000

5,764,000

5,764,000

G:\3

1\22

421\

CAD

D\G

IS\P

roje

cts\

PE

13-H

ydro

logy

and

Hyd

raul

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MX

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Whi

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ther

wis

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ages

and

/or c

osts

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ludi

ng in

dire

ct o

r con

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entia

l dam

age)

whi

ch a

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as

a re

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of th

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oduc

t bei

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accu

rate

, inc

ompl

ete

or u

nsui

tabl

e in

any

way

and

for a

ny re

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.

1:10

,000

010

020

030

040

050

Met

ers

Map

Pro

ject

ion:

Tra

nsve

rse

Mer

cato

rH

oriz

onta

l Dat

um: G

eoce

ntric

Dat

um o

f Aus

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June

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Dat

e

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371,0

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372,0

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372,0

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373,0

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373,0

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374,0

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5,765,000

5,765,000

5,766,000

5,766,000

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Tra

nsve

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Mer

cato

rH

oriz

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l Dat

um: G

eoce

ntric

Dat

um o

f Aus

tralia

199

4G

rid: M

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f Aus

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, Zon

e 55

Dep

t of S

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inab

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& En

viro

nmen

tTh

e D

esal

inat

ion

Proj

ect

Appe

ndix

A

Job

Num

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nE31

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21-0

6

June

200

8

T F

EW

Dat

e

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a so

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SE;

GH

D; V

icM

ap.

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by:

A L

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St M

elb

VIC

300

0 Au

stra

lia

61 3

868

7 80

00

6

1 3

8687

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elm

ail@

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com

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w

ww.

ghd.

com

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0115

30

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54 k

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52 k

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51 k

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503

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370,0

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370,0

00

371,0

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371,0

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372,0

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372,0

00

5,767,000

5,767,000

5,768,000

5,768,000

G:\3

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CAD

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1:10

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020

030

040

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Map

Pro

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ion:

Tra

nsve

rse

Mer

cato

rH

oriz

onta

l Dat

um: G

eoce

ntric

Dat

um o

f Aus

tralia

199

4G

rid: M

ap G

rid o

f Aus

tralia

, Zon

e 55

Dep

t of S

usta

inab

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& En

viro

nmen

tTh

e D

esal

inat

ion

Proj

ect

Appe

ndix

A

Job

Num

ber

Rev

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nE31

-224

21-0

6

June

200

8

T F

EW

Dat

e

Dat

a so

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: D

SE;

GH

D; V

icM

ap.

Cre

ated

by:

A L

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l8/

180

Lons

dale

St M

elb

VIC

300

0 Au

stra

lia

61 3

868

7 80

00

6

1 3

8687

811

1

m

elm

ail@

ghd.

com

.au

w

ww.

ghd.

com

.au

0115

30

Shee

t

of 3

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Lege

nd Cha

inag

e (k

m)

Cur

rent

Tra

nsfe

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56 k

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55 k

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54 k

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526

534

50650

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369,0

00

369,0

00

370,0

00

370,0

00

371,0

00

371,0

00

5,769,000

5,769,000

5,770,000

5,770,000

G:\3

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Tra

nsve

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Mer

cato

rH

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l Dat

um: G

eoce

ntric

Dat

um o

f Aus

tralia

199

4G

rid: M

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f Aus

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, Zon

e 55

Dep

t of S

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Proj

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Appe

ndix

A

Job

Num

ber

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6

June

200

8

T F

EW

Dat

e

Dat

a so

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: D

SE;

GH

D; V

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ap.

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by:

A L

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elb

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0 Au

stra

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00

6

1 3

8687

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m

elm

ail@

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com

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w

ww.

ghd.

com

.au

0115

30

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of 3

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59 k

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58 k

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57 k

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511

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368,0

00

368,0

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369,0

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369,0

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370,0

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370,0

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371,0

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5,771,000

5,771,000

5,772,000

5,772,000

G:\3

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Pro

ject

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Tra

nsve

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Mer

cato

rH

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um: G

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um o

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199

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Dep

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Proj

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June

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MC

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S R

OA

DBO

UNDA

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BUNYIP RIVER M

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ATCH DRAIN

MC GREGORS DRAIN

SOUTH EAST CATCHMENT D

RAIN

MCDONALDS CATCH DRAIND

ALE

Y'S

RD

DR

AIN

GRAYS DRAIN

MCDONALDS DRAIN 3043

HIMBECKS D

RAIN

MCKAYS DRAIN

MCGREGORS CATCH DRAIN

SWAINS D

RAIN

JOHNSONS D

RAIN

SOUT

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DR

AIN

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ND

RD

DR

AI N

MC

KAY

S D

RA

IN

MCDONALDS CATCH DRAIN

MCKAYS DRAIN

61 k

m

60 k

m

59 k

m

516

535

511

515

512

513

514

367,0

00

367,0

00

368,0

00

368,0

00

369,0

00

369,0

00

370,0

00

370,0

00

5,773,000

5,773,000

5,774,000

5,774,000

G:\3

1\22

421\

CAD

D\G

IS\P

roje

cts\

PE

13-H

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1:10

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Tra

nsve

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Mer

cato

rH

oriz

onta

l Dat

um: G

eoce

ntric

Dat

um o

f Aus

tralia

199

4G

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ap G

rid o

f Aus

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, Zon

e 55

Dep

t of S

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inab

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& En

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tTh

e D

esal

inat

ion

Proj

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Appe

ndix

A

Job

Num

ber

Rev

isio

nE31

-224

21-0

6

June

200

8

T F

EW

Dat

e

Dat

a so

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: D

SE;

GH

D; V

icM

ap.

Cre

ated

by:

A L

ovel

l8/

180

Lons

dale

St M

elb

VIC

300

0 Au

stra

lia

61 3

868

7 80

00

6

1 3

8687

811

1

m

elm

ail@

ghd.

com

.au

w

ww.

ghd.

com

.au

0115

30

Shee

t

of 3

022

Lege

nd Cha

inag

e (k

m)

Cur

rent

Tra

nsfe

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elin

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lignm

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30m

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xist

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119

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304

69

356

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139

192

658

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358

561

217

471

729

282

45

129

BALL

AR

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OA

D

KOO WEE RUP ROAD


FECHNER

RO

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MC GREGORS DRAIN

MCDONALDS DRAIN 3043


HIMBECKS D

RAIN

BALL

ARTO

RO

AD E

AST

DR

AIN

MCGREGORS CATCH DRAIN

BALL

ARTO

RO

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EST

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65 k

m

64 k

m

63 k

m

62 k

m

539

538 53

7

520

517

367,0

00

367,0

00

368,0

00

368,0

00

369,0

00

369,0

00

370,0

00

370,0

00

5,775,000

5,775,000

5,776,000

5,776,000

5,777,000

5,777,000

G:\3

1\22

421\

CAD

D\G

IS\P

roje

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PE

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1:10

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Tra

nsve

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Mer

cato

rH

oriz

onta

l Dat

um: G

eoce

ntric

Dat

um o

f Aus

tralia

199

4G

rid: M

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, Zon

e 55

Dep

t of S

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esal

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ion

Proj

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Appe

ndix

A

Job

Num

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Rev

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nE31

-224

21-0

6

June

200

8

T F

EW

Dat

e

Dat

a so

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: D

SE;

GH

D; V

icM

ap.

Cre

ated

by:

A L

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180

Lons

dale

St M

elb

VIC

300

0 Au

stra

lia

61 3

868

7 80

00

6

1 3

8687

811

1

m

elm

ail@

ghd.

com

.au

w

ww.

ghd.

com

.au

0115

30

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t

of 3

023

Lege

nd Cha

inag

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m)

Cur

rent

Tra

nsfe

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elin

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lignm

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30m

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in E

xist

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639

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KOO WEE RUP ROAD

FOW

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BALL

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D W

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MC GREGORS DRAIN

HA

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N

SOLD

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68 k

m

67 k

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66 k

m

65 k

m

545 54

454

3 542

541

540

528

527

523

601

524

525

364,0

00

364,0

00

365,0

00

365,0

00

366,0

00

366,0

00

367,0

00

367,0

00

5,776,000

5,776,000

5,777,000

5,777,000

5,778,000

5,778,000

G:\3

1\22

421\

CAD

D\G

IS\P

roje

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1:10

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Pro

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ion:

Tra

nsve

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Mer

cato

rH

oriz

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l Dat

um: G

eoce

ntric

Dat

um o

f Aus

tralia

199

4G

rid: M

ap G

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f Aus

tralia

, Zon

e 55

Dep

t of S

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nmen

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e D

esal

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ion

Proj

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Appe

ndix

A

Job

Num

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6

June

200

8

T F

EW

Dat

e

Dat

a so

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: D

SE;

GH

D; V

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ap.

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ated

by:

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dale

St M

elb

VIC

300

0 Au

stra

lia

61 3

868

7 80

00

6

1 3

8687

811

1

m

elm

ail@

ghd.

com

.au

w

ww.

ghd.

com

.au

0115

30

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t

of 3

024

Lege

nd Cha

inag

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m)

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WENN ROAD

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RO

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DIXONS ROAD

CARDINIA DRAIN

LOWER TOOMUC CREEK

LOWER GUM SCRUB CREEK

DEEP CREEK CATCH DRAIN

LOWER DEEP CREEK DRAIN

CARDINIA CATCH DRAIN

WEST DALMORE RD DRAIN

CARD

INIA

CAT

CH D

RAIN


71 k

m

70 k

m

69 k

m

68 k

m

622 62

1

545 54

454

3 54252

3

602

601

603

524

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362,0

00

362,0

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363,0

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363,0

00

364,0

00

364,0

00

5,777,000

5,777,000

5,778,000

5,778,000

G:\3

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CAD

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1:10

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Pro

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Tra

nsve

rse

Mer

cato

rH

oriz

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l Dat

um: G

eoce

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Dat

um o

f Aus

tralia

199

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, Zon

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Dep

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e D

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Proj

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Appe

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A

Job

Num

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6

June

200

8

T F

EW

Dat

e

Dat

a so

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SE;

GH

D; V

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ap.

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by:

A L

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dale

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elb

VIC

300

0 Au

stra

lia

61 3

868

7 80

00

6

1 3

8687

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1

m

elm

ail@

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com

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w

ww.

ghd.

com

.au

0115

30

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025

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nd Cha

inag

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Cur

rent

Tra

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CARD

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IN

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INIA

CAT

CH D

RAIN

TOORADIN RD DRAIN

TOORADIN INLET WEST CATCH DR

TOORADIN INLET EAST CATCH DR


72 k

m

71 k

m

73 k

m

623

605

604

622

359,0

00

359,0

00

360,0

00

360,0

00

361,0

00

361,0

00

362,0

00

362,0

00

5,777,000

5,777,000

5,778,000

5,778,000

5,779,000

5,779,000

G:\3

1\22

421\

CAD

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accu

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1:10

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020

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Met

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Map

Pro

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Tra

nsve

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Mer

cato

rH

oriz

onta

l Dat

um: G

eoce

ntric

Dat

um o

f Aus

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199

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Dep

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Proj

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A

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Num

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21-0

6

June

200

8

T F

EW

Dat

e

Dat

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SE;

GH

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ap.

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Lons

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St M

elb

VIC

300

0 Au

stra

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61 3

868

7 80

00

6

1 3

8687

811

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m

elm

ail@

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com

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ww.

ghd.

com

.au

0115

30

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Lege

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75 460

326

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143

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POUND ROAD

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RAIN W

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MUDDY G

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CLYDE C

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LOWER CARDINIA CREEK

76 k

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75 k

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74 k

m

606

623

605

624

357,0

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357,0

00

358,0

00

358,0

00

359,0

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359,0

00

5,779,000

5,779,000

5,780,000

5,780,000

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CAD

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Pro

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Tra

nsve

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Mer

cato

rH

oriz

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l Dat

um: G

eoce

ntric

Dat

um o

f Aus

tralia

199

4G

rid: M

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f Aus

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Dep

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Proj

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Appe

ndix

A

Job

Num

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21-0

6

June

200

8

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EW

Dat

e

Dat

a so

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SE;

GH

D; V

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Cre

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by:

A L

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Lons

dale

St M

elb

VIC

300

0 Au

stra

lia

61 3

868

7 80

00

6

1 3

8687

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1

m

elm

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com

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w

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ghd.

com

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0115

30

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326

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79 k

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78 k

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77 k

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607

608

355,0

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355,0

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356,0

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356,0

00

357,0

00

357,0

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358,0

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358,0

00

5,781,000

5,781,000

5,782,000

5,782,000

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CAD

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1:10

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020

030

040

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Met

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Map

Pro

ject

ion:

Tra

nsve

rse

Mer

cato

rH

oriz

onta

l Dat

um: G

eoce

ntric

Dat

um o

f Aus

tralia

199

4G

rid: M

ap G

rid o

f Aus

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, Zon

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Dep

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A

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Num

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nE31

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6

June

200

8

T F

EW

Dat

e

Dat

a so

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: D

SE;

GH

D; V

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ap.

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by:

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St M

elb

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300

0 Au

stra

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61 3

868

7 80

00

6

1 3

8687

811

1

m

elm

ail@

ghd.

com

.au

w

ww.

ghd.

com

.au

0115

30

Shee

t

of 3

028

Lege

nd Cha

inag

e (k

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Cur

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Tra

nsfe

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82 k

m

81 k

m

80 k

m

79 k

m

620

619

609

610

608

354,0

00

354,0

00

355,0

00

355,0

00

356,0

00

356,0

00

5,783,000

5,783,000

5,784,000

5,784,000

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421\

CAD

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or u

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1:10

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Map

Pro

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Tra

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Mer

cato

rH

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l Dat

um: G

eoce

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Dat

um o

f Aus

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Proj

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June

200

8

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e

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1 3

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com

.au

0115

30

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of 3

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Lege

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84 k

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83 k

m

82 k

m

620

618

354,0

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354,0

00

355,0

00

355,0

00

356,0

00

356,0

00

5,785,000

5,785,000

5,786,000

5,786,000

G:\3

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CAD

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IS\P

roje

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Appendix B

Water Quality Assessment for the Proposed Transfer Pipeline


Appendix B

Water Quality Analysis, for Waterway Crossings ofthe Transfer Pipeline Route

Water Quality IndicatorsThe following relevant parameters were compared with SEPP guidelines for the purposes of this assessment:

Turbidity

Turbidity is an indication of the cloudiness of water caused by the presence of fine suspended matter such asclay, silt and other microscopic particles (NHMRC and NRMC 2004). Turbidity is a measurement of the lightscattering property of water, and the degree of scattering is dependent on the amount, size and composition ofthe suspended matter (NHMRC and NRMC 2004).

Elevated turbidity is considered an indication of poor water quality as the cloudiness inhibits light penetrationthrough the water and reduces aquatic ecosystem productivity.

Suspended Solids

Suspended Solids (SS) is a measurement of the amount of suspended particulate matter present in a watersample. SS measurement is a quantitative analysis of the volume of SS in solution whereas, turbidity is aqualitative measurement of the effect SS has on transmission of light through water.

As with elevated turbidity levels, high SS concentration may be considered an indication of poor water qualityas it also correlates with a reduction in ability of light to penetrate the water. Further, SS levels often correlatewith nutrient concentrations, as some nutrients, such as phosphorous enter a waterway via adsorption toparticulate matter that is transported to the system.

Aesthetic appeal is also reduced by high suspended sediments.

Eschericha coli

The main sources of Eschericha coli (E.coli) are usually municipal sewage discharges, overflows from septictank systems and animal waste from urban and agricultural areas (CCME 2002). These organisms are oftenfound within the gut of warm blooded animals and can make their way to rivers and creeks during stormevents as surfaces are washed clean and sewage systems can be put under stress. These organisms do notpersist for long outside of a host as a result, their presence is an indicator of a recent spill event.

Nutrients – Nitrogen and Phosphorous

Nutrients are important for aquatic ecosystem function, however elevated concentrations can cause poorwaterway health.

Excess nitrogen and phosphorus within water bodies can be the result of fertiliser application within thecatchment or faecal matter from stock. Victorian streams tend to have a balance of N and P. When one of

these nutrients are exceeded algal growth can occur which can alter instream habitats or blue-green algaemay form which can be toxic to humans, animals and birds inhabiting the water (EPA 1998).

Lead

Lead (Pb) is a heavy metal and is mined widely throughout the world (NHMRC and NRMC 2004). Lead is usedin the production of a broad range of goods including lead acid batteries, solder, alloys, cable sheathing, paintpigments, rust inhibitors and lead compounds are used as anti-knock and lubricating compounds in gasoline(NHMRC and NRMC 2004). High concentrations of lead in water can be harmful to organisms. This concern ishighlighted by the low limit for exceedance in the SEPP water quality guidelines.

Zinc

Zinc (Zn) is a widely distributed mineral that occurs in small amounts in rocks, commonly as zinc sulfide. It isalso used as a coating to prevent corrosion of iron and steel products, and for brass manufacture (NHMRCand NRMC 2004). The Australian Drinking Water Guidelines (NHMRC and NRMC 2004) state that in surfaceand ground waters, the concentration of zinc from natural leaching is usually less than 0.01 mg/L. Notably, thisconcentration exceeds the SEPP guideline of less than 0.005 mg Zn/L for Western Port waterways.

Water Quality Results and AnalysisFor each waterway sampled a variety of microbial and physicochemical water quality parameters wereanalysed. For these parameters guideline trigger values exist that can be used as reference levels to assessthe water quality. APPENDIX B outlines the relevant Waters of Western Port Catchment SEPP guidelines.

Only long-term statistics have been analysed using the Melbourne Water long term monitoring data and theVictorian Water Resources Data Warehouse (VWR) data sets. For a more detailed characterisation of thewaterway baseline conditions temporal and spatial variation in water quality may be significant.

Melbourne Water and VWR Water Quality Results

The following observations regarding the long term water quality monitoring results have been made for eachwaterway (with reference to the table below):

Bunyip� All four sites exceed SEPP guidelines for TN and Zn;

� Labertouche and Longwarry North sites exceed SEPP guidelines for Suspended Solids;

� The Koo-Wee-Rup Rd site exceeds SEPP guidelines for Turbidity and TP; and

� The Longwarry North and Iona sites exceed SEPP guidelines for E. Coli.

Deep Creek� All water quality parameters exceed SEPP guidelines, with the exception of Lead; and

� The maximum Turbidity and Suspended Solids measurements were reported at Deep Creek.

Lang Lang River� Both sites exceed SEPP guidelines for TN, TP, E.Coli and Zinc;

� The South Gippsland Highway site also exceeds SEPP guidelines for Turbidity and Lead; and

� The South Gippsland Highway site reported the maximum Lead concentration of all sites monitored.

Eumemmerring Creek

� With the exception of Lead, all water quality parameters exceed SEPP guidelines for this site.

Toomuc Creek� Both sites exceed SEPP guidelines for Turbidity, TN, TP and Zinc.

Cardinia Creek

� Both sites exceed SEPP guidelines for TN, TP and Zinc;

� The Upper Beaconsfield site also exceeds SEPP guidelines for Suspended Solids and

� The Ballarato Road site exceeds SEPP guidelines for Turbidity.

Bass River� TN, TP, Lead and Zinc levels exceed SEPP guidelines; and

� The Bass River site reported the maximum Zinc concentration of all sites monitored.

Powlett River

� Both sites exceed SEPP guidelines for TN and TP;

� The downstream Wonthaggi site also exceeds SEPP guidelines for Turbidity; and

� The downstream Wonthaggi site reported the maximum Turbidity and Suspended Solids measurements ofall sites monitored.

The following observations have been made about the individual water quality parameters:

� All waterways exceed SEPP guidelines for TN;

� All waterways exceed SEPP guidelines for Zinc; and

� With the exception of the Bunyip Main Drain site at Iona, all sites exceed SEPP guidelines for TP.

Key

Wat

er Q

ualit

y M

onito

ring

Res

ults

for B

unyi

p Ri

ver,

Dee

p C

reek

, Lan

g-La

ng R

iver

, Eum

emm

errin

g C

reek

, Too

muc

Cre

ek,

Car

dini

a C

reek

, Bas

s R

iver

and

Pow

lett

Rive

r site

s.

Turb

idity

(NTU

)SS (m

g/L)

TN (mg/

L)TP (m

g/L)

E. C

oli

(org

/ 100

ml)

Lead

(mg/

L)Zi

nc(m

g/L)

SEPP

Gui

delin

es<1

5^ <

5.0!

<20^

<5.0

!<0

.6^

<0.2

!<0

.05^

<0.0

3!20

0^!

<0.0

1^!

<0.0

05^!

Wat

er Q

ualit

y M

onito

ring

Site

Med

ian

Med

ian

Max

Max

Med

ian

Max

Max

Wat

erw

ayLo

catio

nSE

PPSe

gmen

t

Buny

ip R

iver

*N

orth

Lab

erto

uche

Roa

d,La

berto

uche

Nor

ther

nH

ills

9.0

5.0

1.16

0.04

545

0.00

20.

014

Buny

ip R

iver

*D

owns

tream

of C

anni

bal C

rk,

Long

war

ry N

orth

Nor

ther

nH

ills

13.5

7.5

0.88

0.04

526

00.

002

0.00

8

Buny

ip M

ain

Dra

in*

Littl

e R

oad,

Iona

Sout

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ster

nR

ural

11.5

7.5

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8

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ip R

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land

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d Ph

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nd10

2.5

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3.97

1.20

029

00.

006

0.03

4

Turb

idity

(NTU

)SS (m

g/L)

TN (mg/

L)TP (m

g/L)

E. C

oli

(org

/ 100

ml)

Lead

(mg/

L)Zi

nc(m

g/L)

Lang

-Lan

gR

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9

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s R

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outh

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Turb

idity

(NTU

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g/L)

TN (mg/

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g/L)

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(org

/ 100

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(mg/

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nc(m

g/L)

Rur

al

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lett

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er#

Dow

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onth

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000

N/A

N/A

N/A

NO

TES:

Dat

a So

urce

:

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bour

ne W

ater

(200

6);# Vi

ctor

ian

Wat

er R

esou

rces

Dat

a W

areh

ouse

;

Stat

e En

viro

nmen

tal P

rote

ctio

n Po

licy

Gui

delin

es -

Wat

ers

of W

este

rn P

ort a

nd c

atch

men

t -

^Seg

men

ts: S

outh

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tern

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al a

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Phill

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land

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ent:

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n H

ills

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PP G

uide

line

Exce

edan

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ding

den

otes

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imum

of a

ll da

ta p

rese

nted

Appendix C

SEPP Assessment of the Transfer Pipeline Alignment


Appendix CState Environment Protection Policy Assessment of the Transfer Pipeline AlignmentThe State Environmental Protection Policy (SEPP)(Waters of Victoria) aims to help achieve sustainable surface watersby:

� “Setting out the environmental values and beneficial uses of water that Victorians want, and the environmental qualityrequired to protect them”, and

� “Setting, within a 10 year timeframe, goals for protection agencies, businesses and communities and means bywhich they can be met”.

For this document ‘beneficial uses’ are defined as a “…use of the environment which is conductive to public benefit,welfare, safety, health or aesthetic enjoyment and which requires protection from the effects of waste discharges.” Intrying to protect these uses the SEPP (Waters of Victoria) notes that the variation of environmental quality of surfacewaters on a state-wide scale will mean that:

� “Some beneficial uses are currently protected and will remain protected”;

� “Some beneficial uses may not be fully attained in all segments within the 10-year lifetime of the [SEPP]. In thesecases, the regional catchment and coastal management processes will set regional targets to be achieved over the[SEPP’s] life”;

� “Some beneficial uses in some surface waters may not be fully attained due to extensive environmental modification.This should be taken into account when developing and prioritising actions to improve environmental quality.”

The SEPP provides a broad overarching policy framework for the protection of the surface waters of Victoria, but alsoincludes a number of ‘Schedules’ and ‘Policies’ that focus in on specific waters or catchments to provide improvedprotection and/or rehabilitation of specific beneficial uses to these areas.

Relevant SEPP Components

Based on the transfer pipeline alignment and its associated waterway crossings, the following components of the SEPPare relevant when determining the beneficial uses and water quality objectives:

� State Environmental Protection Policy (Waters of Victoria) – general document;

� ‘Insertion Schedule F8 – Waters of Western Port Bay and Catchment‘ – addition to overall SEPP;

� ‘Insertion Schedule F6 – Waters of Port Phillip Bay’ - addition to overall SEPP; and

� ‘Policy Area No. W-28A (Waters of the Dandenong Valley)’ – an addition component of Schedule F6.

Segments of Surface Water Environments

In order to focus the environmental objectives on to the beneficial uses of specific area, the broad areas covered underthe documents above have been separated in to policy areas or segments with varying beneficial uses. Table 1 providesa breakdown of the policy area or segment and SEPP component classification of all the waterway crossings along thetransfer pipeline alignment (please note these classifications are approximate based on the small, black and white figuresin the above mentioned SEPP components).

Table 1: Classification of Waterway Crossings

Waterway Crossing No. SEPP Component Policy Area or Segment

103, 104, 105, 119, 120 State Environmental ProtectionPolicy (Waters of Victoria)

Estuaries & Inlets

(Ultimate discharge to Bass Strait)

110, 122 State Environmental ProtectionPolicy (Waters of Victoria)

Rivers & Streams – Cleared Hills &Coastal Plains

(Ultimate discharge to Bass Strait)

112, 113, 114, 115, 116, 123, 124,121, 219, 220, 228, 229, 208, 230,212, 213, 214, 231, 223, 224, 225,226, 227, 301, 302, 303, 304, 305,326, 327, 328, 329

Insertion Schedule F8 – Waters ofWestern Port Bay and Catchment

South Eastern Rural

(Ultimate discharge to ‘East Arm’part of Western Port)

319, 320, 321, 322, 323, 340, 341,418, 419, 420, 421, 405, 406, 407,408, 422, 410, 411, 423, 424


South Eastern Rural

(Ultimate discharge via ‘Lowlands &Phillip Island’ to ‘East Arm’ part ofWestern Port)

425, 426, 427, 428 Insertion Schedule F8 – Waters ofWestern Port Bay and Catchment

Lowlands and Phillip Island

(Ultimate discharge to ‘East Arm’part of Western Port)

529, 530, 531, 532, 533, 534, 526,508, 509, 510, 511, 512, 535, 514,515, 516, 536, 537, 538, 539


South Eastern Rural

(Ultimate discharge via ‘Lowlands &Phillip Island’ to ‘East Arm’ part ofWestern Port)

540, 541, 542, 543, 544, 545, 621,622



(Ultimate discharge to ‘East Arm’ ofWestern Port)

623, 624, 606 Insertion Schedule F8 – Waters ofWestern Port Bay and Catchment


(Ultimate discharge to ‘Entrancesand North Arm’ part of WesternPort)

607, 608, 609, 619, 620, 618 Policy Area No. W-28A (Waters ofthe Dandenong Valley) – which is acomponent of Insertion Schedule F6 –Waters of Port Phillip Bay’

Patterson River

(Ultimate Discharge to ‘Inshore’ and‘General’ part of Port Phillip Bay)

Beneficial Uses

Based on the primary classifications, Table 2 details the beneficial uses that need to be protected for each of theidentified policy areas or segments. For beneficial uses of ultimate discharge points refer to actual legislative documents.

Table 2: Beneficial Uses

Policy Area or Segment Beneficial UsesEstuaries & Inlets � Aquatic ecosystems:

o Slightly to moderately modified� Water suitable for

o Primary contact recreation;o Secondary contact recreation;o Aesthetic enjoyment;o Indigenous cultural and spiritual values;o Non-indigenous cultural and spiritual values;o Aquaculture;o Industrial and commercial use;o Fish, crustacea and molluscs for human consumption.

Rivers & Streams – ClearedHills & Coastal Plains

� Aquatic ecosystems:o Slightly to moderately modified

� Water suitable foro Primary contact recreation;o Secondary contact recreation;o Aesthetic enjoyment;o Indigenous cultural and spiritual values;o Non-indigenous cultural and spiritual values;o Agriculture and irrigation;o Aquaculture;o Industrial and commercial use;o Human consumption after appropriate treatment; ando Fish, crustacea and molluscs for human consumption.

South Eastern Rural � Aquatic ecosystems:o Largely modified aquatic ecosystemso Passage for native fish and other aquatic biota

� Water suitable for:o Primary contact recreation;o Secondary contact recreation;o Aesthetic enjoyment;o Agriculture;o Industrial and commercial use;o Human consumption after disinfection and removal of suspended solids;o Consumption of fish, crustacea and molluscs for recreational or commercial purposes.

Lowlands and Phillip Island � Aquatic ecosystems:o Largely modified aquatic ecosystemso Passage for native fish and other aquatic biota

� Water suitable for:o Primary contact recreation;o Secondary contact recreation;o Aesthetic enjoyment;o Agriculture;o Industrial and commercial use;o Human consumption after disinfection and removal of suspended solids;o Consumption of fish, crustacea and molluscs for recreational or commercial purposes.

Patterson River -

Attainment Program

There are responsibilities for communities, businesses and protection agencies, to plan and manage Victoria’s surfacewaters and any activity that impacts on them, in an ecologically sustainable manner. General responsibilities forimplementing the Policy are identified in Clause 13 of the SEPP and key responsibilities are identified in Clauses 14 to23. In addition to these broad responsibilities, there are additional clauses in the more focussed schedules and policiesdescribed under the ‘Attainment Program’ sections in their respective documents.

Construction Activities

The main SEPP document states, “Construction works need to managed to minimise land disturbance, soil erosion andthe discharge of sediments and other pollutants to surface waters.” Construction managers are therefore required toimplement effective management practices consistent with guidance from the EPA, including that provided in the currentamended version of Environmental Guidelines for Major Construction Sites (1996), and the current amended version ofConstruction Techniques for Sediment Pollution Control (1991). SEPP also states, where construction activities cross oradjoin surface waters, construction managers are required to monitor affected surface waters to make an assessment asto the protection of the beneficial uses.

Environmental Quality Objectives and Indicators

The main SEPP document states, “surface waters and their aquatic ecosystems need to be free of any substance at anylevel, or human impact, that would pose a risk to beneficial uses.” Although the environmental quality objectives arerequired to be attained as much as practicable, the SEPP requires that the variation of environmental quality of surfacewaters on a State-wide scale will be such that:

1 “the environmental quality of some surface waters will be better than the environmental quality objectives. Inthese cases, environmental quality should remain as close as practicable to background levels”;

2 “the environmental quality objectives for some surface waters may not be attained due to natural variation. Inthese cases, the background level becomes the environmental quality objective.”

Clauses to the same effect also apply under the additional ‘Schedules’ and ‘Policies’ for the specific areas. Based on thisand knowledge of the beneficial uses the environmental quality objectives or targets identified in Appendix A have beendeveloped for these areas. However, given the transfer pipeline is most likely to have a direct influence on suspendedsolids and its associated problems, Table 3 defines the relevant water quality objectives as specified in the SEPP orassociated schedule or policy. In relation to these objectives, all the documents state that if there is no specific value,comment indicating the use of background levels, or justification for the application of the clauses above, theenvironmental quality objective values become those specified in the Australian and New Zealand Guidelines for Freshand Marine Water Quality (2000) (The Guidelines).

Table 3: Environmental Quality Objectives

Indicator (or pollutant) Policy Area or Segment ObjectiveEstuaries & Inlets 75th Percentile • R75Rivers & Streams – Cleared Hills & Coastal Plains 75th Percentile • 10 NTUSouth Eastern Rural Median < 15 NTU

75th percentile < 25 NTULowlands and Phillip Island Median < 15 NTU

75th percentile < 25 NTU

Turbidity

Patterson River Median < 30 FTU90th percentile < 35 FTU

Estuaries & Inlets • R75Rivers & Streams – Cleared Hills & Coastal Plains -South Eastern Rural Median < 20 mg/L

75th percentile < 30 mg/LLowlands and Phillip Island Median < 20 mg/L

75th percentile < 30 mg/L

Suspended Solids

Patterson River Median < 10 mg/L90th percentile < 20 mg/L

Appendix A1: Summary of SEPP Requirements for various Policy Segments or Areas

The following data has been extracted from SEPP (Waters of Victoria)

The following data relating to the SEPP objectives has been extracted from the Victorian Department ofSustainability and Environment’s 2002 report entitled: “Victorian Water Quality MonitoringAnnual Report: 2002” (Available at: http://www.vicwaterdata.net/vicwaterdata/publishedDocs/docs/annRept2002.pdf)

Appendix D

Waterway Crossing Proformas


Cros

sing

Numb

er

103

Wate

rway

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e Un

name

dW

aterw

ay T

ype

Wate

rcour

se C

hann

el Dr

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37

1312

Easti

ng

5729

246

Site

Visit

Com

plete

d Ye

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ater

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pical

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scrip

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vium,

grav

el, sa

nd, s

iltIn

stre

am fe

atur

esCh

anne

l Widt

h 1.2

mTo

p of B

ank W

idth

1.4m

Bank

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ht 0.4

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nk S

hape

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rtical

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nel S

tabilit

y St

able

Bank

Stab

ility

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s Ru

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nil

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h Un

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Instre

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use

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uatic

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Defin

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acce

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mall c

lumps

ofma

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0.3m

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ter pr

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dimen

t tra

nspo

rt for

pipe

jack

ing

Low

Risk

of flo

oding

for t

renc

hing

Low

Risk

of flo

oding

for p

ipe ja

cking

Lo

wCo

nstru

ction

Meth

od

Tren

ching

Miti

gatio

nSt

anda

rd M

anag

emen

t Mea

sure

s Co

nstru

ction

man

agem

ent m

easu

res a

ndOp

erati

on m

anag

emen

t mea

sure

sSp

ecific

Mitig

ation

Mi

nimise

site

distur

banc

e, Cr

ossin

g wate

rway

perp

endic

ular t

o alig

nmen

t, Plac

emen

t of c

lean

rock

for w

orkin

g plat

form,

Stre

amflo

w div

ersio

nme

asur

es, D

iversi

on d

rains

and

bund

s for

wate

rma

nage

men

t, Wee

d man

agem

ent, R

einsta

teex

cava

ted p

rofile

, Fen

cing,

Reha

bilita

tion o

fba

nks,

Reve

getat

ion, B

ed co

ntrol

struc

tures

,Ro

ck rip

rap p

lacem

ent o

n ban

ks.

Cros

sing

Numb

er

104

Wate

rway

Nam

e Un

name

dW

aterw

ay T

ype

Wate

rcour

se C

hann

el Dr

ainNo

rthing

37

1338

Easti

ng

5729

463

Site

Visit

Com

plete

d Ye

sG

ener

alRe

ceivi

ng W

ater

Bass

Stra

itCl

assif

icatio

n Fa

rm/ro

ad dr

ain ch

anne

lised

Chan

nel P

lan F

orm

Chan

nelis

edCa

tchme

nt Ar

ea (h

a)

10Ty

pical

Slop

e @ P

OINT

Fla

tGe

ologic

al De

scrip

tion

Aeoli

an: d

une d

epos

its: s

and,

clay,

calca

reou

ssa

ndIn

stre

am fe

atur

esCh

anne

l Widt

h 1.5

mTo

p of B

ank W

idth

5mBa

nk H

eight

0.4m

Bank

Sha

pe

Conv

ex up

ward

sCh

anne

l Stab

ility

Stab

leBa

nk S

tabilit

y St

able

Featu

res

Nil

Freq

uenc

y of F

low

Inter

mitte

ntFl

oodp

lain

Fea

ture

s Flood

plain

featur

es

levee

sFlo

odpla

in W

idth

Unco

nfine

dRi

paria

n Veg

etatio

n Cl

eare

dIns

tream

Veg

etatio

n Ab

sent

Fenc

ed

NoLa

ndus

e Ag

ricult

ural

Flor

a an

d Fa

una

Valu

esTe

rrestr

ial

No po

tentia

l hab

itat fo

r sign

ifican

t faun

a. F

rogs

may b

e pre

sent.

Aqua

tic F

auna

Aqua

tic H

abita

tC

omm

ents

Comm

ents

Leve

e on

right

bank

only.

Ris

kRi

sk of

sedim

ent t

rans

port

for tr

ench

ing

Low

Risk

of se

dimen

t tra

nspo

rt for

pipe

jack

ing

Low

Risk

of flo

oding

for t

renc

hing

Low

Risk

of flo

oding

for p

ipe ja

cking

Lo

wCo

nstru

ction

Meth

od

Tren

ching

Miti

gatio

nSt

anda

rd M

anag

emen

t Mea

sure

s Co

nstru

ction

man

agem

ent m

easu

res a

ndOp

erati

on m

anag

emen

t mea

sure

sSp

ecific

Mitig

ation

Mi

nimise

site

distur

banc

e, we

ed m

anag

emen

t,Re

instat

e exc

avate

d pro

file, R

eveg

etatio

n

Cros

sing

Numb

er

105

Wate

rway

Nam

e Po

wlett

Rive

rW

aterw

ay T

ype

Conn

ector

North

ing

3713

56Ea

sting

57

2961

7Si

te Vi

sit C

omple

ted

Yes

Gen

eral

Rece

iving

Wate

r Ba

ss S

trait

Clas

sifica

tion

Unco

nfine

d Sinu

ous W

aterw

ayCh

anne

l Plan

For

m Si

nuou

sCa

tchme

nt Ar

ea (h

a)

4508

3Ty

pical

Slop

e @ P

OINT

Fla

tGe

ologic

al De

scrip

tion

Aeoli

an: d

une d

epos

its: s

and,

clay,

calca

reou

ssa

ndIn

stre

am fe

atur

esCh

anne

l Widt

h 23

mTo

p of B

ank W

idth

35Ba

nk H

eight

1mBa

nk S

hape

Co

nvex

upwa

rdCh

anne

l Stab

ility

Stab

leBa

nk S

tabilit

y Er

oding

Featu

res

Freq

uenc

y of F

low

Pere

nnial

Floo

dpla

in F

eatu

res Flo

odpla

in fea

tures

Te

rrace

Flood

plain

Widt

h Un

confi

ned

Ripa

rian V

egeta

tion

Clea

red

Instre

am V

egeta

tion

Abse

ntFe

nced

No

Land

use

agric

ultur

alFl

ora

and

Faun

a Va

lues

Terre

strial

Pr

edom

inantl

y intr

oduc

ed ve

getat

ion.

Aqua

tic F

auna

No

thre

ated f

ish sp

ecies

foun

d, Au

strali

anGr

aylin

g may

be pr

esen

t.Aq

uatic

Hab

itat

Com

men

tsCo

mmen

ts Er

osion

on r

ight b

ank,

left b

ank s

table.

Sca

ttere

dma

croph

ytes.

Left b

ank l

aid b

ack w

ith L

ow ba

nklea

ding t

o floo

dplai

n. A

t tim

e of in

vesti

gatio

n,we

tted w

idth p

roba

bly la

rger

than

"usu

al". W

ater

prob

ably

back

ed up

by m

outh

of Po

wlett

being

close

d. N

atura

l terra

ce pr

ovidi

ng flo

od pr

otecti

onon

true

right.

Acti

ve ba

nk im

media

tely u

pstre

amsh

ows e

viden

ce of

pre

vious

eros

ion. L

evee

set

back

appr

oxim

ately

60m

from

left b

ank o

fwa

terwa

y - on

imm

ediat

e righ

t ban

k of w

ater

way

104.

Furth

er in

vesti

gatio

n to a

sses

s dep

th of

hard

inver

t nee

ds to

be un

derta

ken.

Will

requ

ire in

put

from

geote

chnic

al sp

ecial

ist in

vesti

gatio

n as

well

as ot

her d

iscipl

ines.

Stoc

k Acc

ess.

Ris

kRi

sk of

sedim

ent t

rans

port

for tr

ench

ing

High

Risk

of se

dimen

t tra

nspo

rt for

pipe

jack

ing

Mediu

mRi

sk of

flood

ing fo

r tre

nchin

g Me

dium

Risk

of flo

oding

for p

ipe ja

cking

Lo

wCo

nstru

ction

Meth

od

Pipe

jack

Miti

gatio

nSt

anda

rd M

anag

emen

t Mea

sure

s Co

nstru

ction

man

agem

ent m

easu

res a

ndOp

erati

on m

anag

emen

t mea

sure

sSp

ecific

Mitig

ation

Mi

nimise

site

distur

banc

e, Di

versi

on dr

ains a

ndbu

nds f

or w

ater m

anag

emen

t, Wee

dma

nage

men

t, Rein

state

exca

vate

d pro

file,

Reve

getat

ion, B

ed co

ntrol

struc

tures

.

Cros

sing

Numb

er

119

Wate

rway

Nam

e Br

idge

Cree

kW

aterw

ay T

ype

Wate

rcour

se R

iver

North

ing

3707

98Ea

sting

57

3029

4Si

te Vi

sit C

omple

ted

NoG

ener

alRe

ceivi

ng W

ater

Bass

Stra

itCl

assif

icatio

n Pa

rtially

Con

fined

Sinu

ous C

hann

elCh

anne

l Plan

For

m Si

nuou

sCa

tchme

nt Ar

ea (h

a)

2085

Typic

al Sl

ope @

POI

NT

320

Geolo

gical

Desc

riptio

n Flu

vial: a

lluviu

m, gr

avel,

sand

, silt

Inst

ream

feat

ures

Chan

nel W

idth

2mTo

p of B

ank W

idth

2mBa

nk H

eight

1mBa

nk S

hape

Co

nvex

upwa

rds

Chan

nel S

tabilit

y St

able

Bank

Stab

ility

Stab

leFe

ature

s Ru

nFr

eque

ncy o

f Flow

Pe

renn

ialFl

oodp

lain

Fea

ture

s Flood

plain

featur

es

Terra

ceFlo

odpla

in W

idth

30m

Ripa

rian V

egeta

tion

Conti

nuou

s nar

row

strip

of re

mnan

t veg

etatio

nIns

tream

Veg

etatio

n Ph

ragm

ites

Fenc

ed

Yes

Land

use

Agric

ultur

alFl

ora

and

Faun

a Va

lues

Terre

strial

Sw

amp s

crub E

VC pr

esen

t. Na

tive t

rees

.Aq

uatic

Fau

na

No fis

h rec

orde

d, ho

weve

r cou

ld su

ppor

t Dwa

rfGa

laxias

.Aq

uatic

Hab

itat

Com

men

tsCo

mmen

ts Di

suse

d rail

way b

ound

ing ch

anne

l (dow

nstre

am).

Poten

tial fo

r cha

nnel

to mi

grate

.

Ris

kRi

sk of

sedim

ent t

rans

port

for tr

ench

ing

Mediu

mRi

sk of

sedim

ent t

rans

port

for pi

pe ja

cking

Me

dium

Risk

of flo

oding

for t

renc

hing

Mediu

mRi

sk of

flood

ing fo

r pipe

jack

ing

Low

Cons

tructi

on M

ethod

Pi

pe ja

ckM

itiga

tion

Stan

dard

Man

agem

ent M

easu

res

Cons

tructi

on m

anag

emen

t mea

sure

s and

Oper

ation

man

agem

ent m

easu

res

Spec

ific M

itigati

on

Minim

ise si

te dis

turba

nce,

strea

mflow

dive

rsion

meas

ures

, wee

d man

agem

ent,

reins

tate

exca

vated

pro

file, r

eveg

etatio

n. S

et ba

ck pi

pejac

king o

pera

tion

acco

rding

to C

MA re

quire

ments

.

Cros

sing

Numb

er

120

Wate

rway

Nam

e W

oolsh

ed C

reek

Wate

rway

Typ

e W

aterco

urse

Rive

rNo

rthing

37

0459

Easti

ng

5730

373

Site

Visit

Com

plete

d No

Gen

eral

Rece

iving

Wate

r Ba

ss S

trait

Clas

sifica

tion

Partia

lly C

onfin

ed S

inuou

s Cha

nnel

Chan

nel P

lan F

orm

mean

der

Catch

ment

Area

(ha)

72

5Ty

pical

Slop

e @ P

OINT

Fla

tGe

ologic

al De

scrip

tion

Aeoli

an: d

une d

epos

its: s

and,

clay,

calca

reou

ssa

ndIn

stre

am fe

atur

esCh

anne

l Widt

h 2m

Top o

f Ban

k Widt

h 2m

Bank

Heig

ht 0.1

mBa

nk S

hape

Chan

nel S

tabilit

y St

able

Bank

Stab

ility

Stab

leFe

ature

s Ru

nFr

eque

ncy o

f Flow

Floo

dpla

in F

eatu

res Flo

odpla

in fea

tures

Pa

leoch

anne

l, swa

mpFlo

odpla

in W

idth

Ripa

rian V

egeta

tion

Patch

es of

remn

ant v

egeta

tion

Instre

am V

egeta

tion

Fenc

edLa

ndus

e Ag

ricult

ural

Flor

a an

d Fa

una

Valu

esTe

rrestr

ial

No G

rowl

ing G

rass

Fro

g fou

nd. P

otenti

al ha

bitat

for S

wamp

Skin

k and

Glos

sy g

rass

Skin

kAq

uatic

Fau

na

No th

reate

ned f

ish sp

ecies

reco

rded

.Aq

uatic

Hab

itat

Com

men

tsCo

mmen

ts Im

media

tely d

owns

tream

of m

eand

er. D

isuse

dra

ilway

boun

ding

chan

nel.

Evide

nce

of old

(pale

ocha

nnel)

on f

loodp

lain d

owns

tream

. Dam

on le

ft floo

dplai

n. B

anks

are n

ot we

ll defi

ned.

Swam

py ar

ea im

media

tely s

urro

undin

gpe

rman

ent c

hann

el.

Ris

kRi

sk of

sedim

ent t

rans

port

for tr

ench

ing

Mediu

mRi

sk of

sedim

ent t

rans

port

for pi

pe ja

cking

Me

dium

Risk

of flo

oding

for t

renc

hing

Mediu

mRi

sk of

flood

ing fo

r pipe

jack

ing

Low

Cons

tructi

on M

ethod

Tr

ench

Miti

gatio

nSt

anda

rd M

anag

emen

t Mea

sure

s Co

nstru

ction

man

agem

ent m

easu

res a

ndOp

erati

on m

anag

emen

t mea

sure

sSp

ecific

Mitig

ation

Mi

nimise

site

distur

banc

e, cro

ssing

wate

rway

perp

endic

ular t

o alig

nmen

t, stre

amflo

w div

ersio

nme

asur

es, w

eed m

anag

emen

t, re

instat

eex

cava

ted p

rofile

, rev

egeta

tion

Cros

sing

Numb

er

110

Wate

rway

Nam

e Un

name

dW

aterw

ay T

ype

Wate

rcour

se S

tream

North

ing

3693

17Ea

sting

57

3246

0Si

te Vi

sit C

omple

ted

NoG

ener

alRe

ceivi

ng W

ater

Bass

Stra

itCl

assif

icatio

n Va

lley F

illCh

anne

l Plan

For

m Un

defin

edCa

tchme

nt Ar

ea (h

a)Ty

pical

Slop

e @ P

OINT

25

Geolo

gical

Desc

riptio

n Flu

vial: l

ithic

sand

stone

, silts

tone

, mino

rco

nglom

erate

, coa

lIn

stre

am fe

atur

esCh

anne

l Widt

hTo

p of B

ank W

idth

Bank

Heig

htBa

nk S

hape

Chan

nel S

tabilit

yBa

nk S

tabilit

yFe

ature

s no

neFr

eque

ncy o

f Flow

Int

ermi

ttent

Floo

dpla

in F

eatu

res Flo

odpla

in fea

tures

Ni

lFlo

odpla

in W

idth

Partia

lly C

onfin

edRi

paria

n Veg

etatio

n Cl

eare

dIns

tream

Veg

etatio

n Ab

sent

Fenc

ed

NoLa

ndus

e Ag

ricult

ural

Flor

a an

d Fa

una

Valu

esTe

rrestr

ial

Intro

duce

d veg

etatio

nAq

uatic

Fau

naAq

uatic

Hab

itat

None

Com

men

tsCo

mmen

ts Ro

ad im

media

tely d

owns

tream

. Onli

ne da

msdo

wnstr

eam.

No

site

imag

e av

aila

ble

at th

is tim

e

Ris

kRi

sk of

sedim

ent t

rans

port

for tr

ench

ing

Low

Risk

of se

dimen

t tra

nspo

rt for

pipe

jack

ing

Low

Risk

of flo

oding

for t

renc

hing

Low

Risk

of flo

oding

for p

ipe ja

cking

Lo

wCo

nstru

ction

Meth

od

Tren

ching

Miti

gatio

nSt

anda

rd M

anag

emen

t Mea

sure

s Co

nstru

ction

man

agem

ent m

easu

res a

ndOp

erati

on m

anag

emen

t mea

sure

sSp

ecific

Mitig

ation

Mi

nimise

site

distur

banc

e, we

ed m

anag

emen

t,Re

instat

e exc

avate

d pro

file, R

eveg

etatio

n

Cros

sing

Numb

er

122

Wate

rway

Nam

eW

aterw

ay T

ype

North

ing

3692

76Ea

sting

57

3373

3Si

te Vi

sit C

omple

ted

NoG

ener

alRe

ceivi

ng W

ater

Bass

Stra

itCl

assif

icatio

n Co

nfine

d Hea

dwate

r Cha

nnel

Chan

nel P

lan F

orm

Stra

ight

Catch

ment

Area

(ha)

Typic

al Sl

ope @

POI

NT

40Ge

ologic

al De

scrip

tion

Fluvia

l: lith

ic sa

ndsto

ne, s

iltsto

ne, m

inor

cong

lomer

ate, c

oal

Inst

ream

feat

ures

Chan

nel W

idth

Top o

f Ban

k Widt

h ~1

9mBa

nk H

eight

Bank

Sha

peCh

anne

l Stab

ility

Bank

Stab

ility

Featu

res

Freq

uenc

y of F

lowFl

oodp

lain

Fea

ture

s Flood

plain

featur

esFlo

odpla

in W

idth

Confi

ned

Ripa

rian V

egeta

tion

Clea

red

Instre

am V

egeta

tion

Fenc

ed

NoLa

ndus

e Ag

ricult

ural

Flor

a an

d Fa

una

Valu

esTe

rrestr

ialAq

uatic

Fau

naAq

uatic

Hab

itat

Com

men

tsCo

mmen

ts Co

nfine

d by r

oad

No

site

imag

e av

aila

ble

at th

is tim

e

Ris

kRi

sk of

sedim

ent t

rans

port

for tr

ench

ing

Low

Risk

of se

dimen

t tra

nspo

rt for

pipe

jack

ing

Low

Risk

of flo

oding

for t

renc

hing

Low

Risk

of flo

oding

for p

ipe ja

cking

Lo

wCo

nstru

ction

Meth

od

Tren

ching

Miti

gatio

nSt

anda

rd M

anag

emen

t Mea

sure

s Co

nstru

ction

man

agem

ent m

easu

res a

ndOp

erati

on m

anag

emen

t mea

sure

sSp

ecific

Mitig

ation

Mi

nimise

site

distur

banc

e, cro

ssing

wate

rway

perp

endic

ular t

o alig

nmen

t, wee

d man

agem

ent,

reins

tate

exca

vated

pro

file, r

eveg

etatio

n, be

dco

ntrol

works

Cros

sing

Numb

er

112

Wate

rway

Nam

e 39

05 T

rib of

390

4W

aterw

ay T

ype

Wate

rcour

se C

hann

el Dr

ainNo

rthing

36

8440

Easti

ng

5737

094

Site

Visit

Com

plete

d No

Gen

eral

Rece

iving

Wate

r W

ester

n Por

tCl

assif

icatio

n Pa

rtially

Con

fined

Cha

nneli

sed W

aterw

ays

Chan

nel P

lan F

orm

Chan

nelis

edCa

tchme

nt Ar

ea (h

a)

86Ty

pical

Slop

e @ P

OINT

49

Geolo

gical

Desc

riptio

n Flu

vial:

gully

allu

vium,

collu

vium:

grav

el, sa

nd,

silt

Inst

ream

feat

ures

Chan

nel W

idth

Top o

f Ban

k Widt

h ~1

mBa

nk H

eight

Bank

Sha

peCh

anne

l Stab

ility

Bank

Stab

ility

Featu

res

Freq

uenc

y of F

lowFl

oodp

lain

Fea

ture

s Flood

plain

featur

esFlo

odpla

in W

idth

Partia

lly C

onfin

edRi

paria

n Veg

etatio

n Cl

eare

dIns

tream

Veg

etatio

n Ab

sent

Fenc

ed

NoLa

ndus

e Ag

ricult

ural

Flor

a an

d Fa

una

Valu

esTe

rrestr

ial

Intro

duce

d veg

etatio

n, no

habit

at for

sign

ifican

tfau

na.

Aqua

tic F

auna

Aqua

tic H

abita

t No

instr

eam

habit

atC

omm

ents

Comm

ents

Con

fined

by ro

ad on

two s

ides.

No

site

imag

e av

aila

ble

at th

is tim

e

Ris

kRi

sk of

sedim

ent t

rans

port

for tr

ench

ing

Low

Risk

of se

dimen

t tra

nspo

rt for

pipe

jack

ing

Low

Risk

of flo

oding

for t

renc

hing

Low

Risk

of flo

oding

for p

ipe ja

cking

Lo

wCo

nstru

ction

Meth

od

Tren

ching

Miti

gatio

nSt

anda

rd M

anag

emen

t Mea

sure

s Co

nstru

ction

man

agem

ent m

easu

res a

ndOp

erati

on m

anag

emen

t mea

sure

sSp

ecific

Mitig

ation

Mi

nimise

site

distur

banc

e, Cr

ossin

g wate

rway

perp

endic

ular t

o alig

nmen

t, wee

d man

agem

ent,

reins

tate

exca

vated

pro

file, r

eveg

etatio

n.

Cros

sing

Numb

er

113

Wate

rway

Nam

e Un

name

dW

aterw

ay T

ype

Wate

rcour

se C

hann

el Dr

ainNo

rthing

36

8496

Easti

ng

5737

470

Site

Visit

Com

plete

d Ye

sG

ener

alRe

ceivi

ng W

ater

Wes

tern P

ort

Clas

sifica

tion

Farm

/road

drain

chan

nelis

edCh

anne

l Plan

For

m Ch

anne

lised

Catch

ment

Area

(ha)

13

Typic

al Sl

ope @

POI

NT

130

Geolo

gical

Desc

riptio

n Flu

vial:

gully

alluv

ium, c

olluv

ium: g

rave

l, san

d,sil

tIn

stre

am fe

atur

esCh

anne

l Widt

h 0.4

mTo

p of B

ank W

idth

1mBa

nk H

eight

0.15m

Bank

Sha

pe

Conv

ex up

ward

sCh

anne

l Stab

ility

Stab

leBa

nk S

tabilit

y St

able

Featu

res

nilFr

eque

ncy o

f Flow

int

ermi

ttent

Floo

dpla

in F

eatu

res Flo

odpla

in fea

tures

nil

Flood

plain

Widt

h Un

confi

ned

Ripa

rian V

egeta

tion

Clea

red

Instre

am V

egeta

tion

Abse

ntFe

nced

No

Land

use

Agric

ultur

alFl

ora

and

Faun

a Va

lues

Terre

strial

Int

rodu

ced v

egeta

tion,

no ha

bitat

for si

gnific

ant

fauna

.Aq

uatic

Fau

naAq

uatic

Hab

itat

No in

strea

m ha

bitat

Com

men

tsCo

mmen

ts Ri

ght b

ank f

ence

d, bu

t still

have

cattle

acce

ss

Ris

kRi

sk of

sedim

ent t

rans

port

for tr

ench

ing

Low

Risk

of se

dimen

t tra

nspo

rt for

pipe

jack

ing

Low

Risk

of flo

oding

for t

renc

hing

Low

Risk

of flo

oding

for p

ipe ja

cking

Lo

wCo

nstru

ction

Meth

od

Tren

ching

Miti

gatio

nSt

anda

rd M

anag

emen

t Mea

sure

s Co

nstru

ction

man

agem

ent m

easu

res a

ndOp

erati

on m

anag

emen

t mea

sure

sSp

ecific

Mitig

ation

Mi

nimise

site

distur

banc

e, W

eed m

anag

emen

t,Re

instat

e exc

avate

d pro

file, R

eveg

etatio

n

Cros

sing

Numb

er

114

Wate

rway

Nam

e Un

name

dW

aterw

ay T

ype

Wate

rcour

se C

hann

el Dr

ainNo

rthing

36

8534

Easti

ng

5737

733

Site

Visit

Com

plete

d Ye

sG

ener

alRe

ceivi

ng W

ater

Wes

tern P

ort

Clas

sifica

tion

Farm

/road

drain

chan

nelis

edCh

anne

l Plan

For

m Ch

anne

lised

Catch

ment

Area

(ha)

43

Typic

al Sl

ope @

POI

NT

Flat

Geolo

gical

Desc

riptio

n Flu

vial: a

lluviu

m, gr

avel,

sand

, silt

Inst

ream

feat

ures

Chan

nel W

idth

0.5m

Top o

f Ban

k Widt

h 2.5

mBa

nk H

eight

0.7m

Bank

Sha

pe

Conv

ex up

ward

sCh

anne

l Stab

ility

Stab

leBa

nk S

tabilit

y St

able

Featu

res

Nil

Freq

uenc

y of F

low

Inter

mitte

ntFl

oodp

lain

Fea

ture

s Flood

plain

featur

es

Nil

Flood

plain

Widt

h Un

confi

ned

Ripa

rian V

egeta

tion

Clea

red

Instre

am V

egeta

tion

Abse

ntFe

nced

No

Land

use

Agric

ultur

alFl

ora

and

Faun

a Va

lues

Terre

strial

Aqua

tic F

auna

Aqua

tic H

abita

tC

omm

ents

Comm

ents

Righ

t ban

k fen

ced,

but s

till ha

ve ca

ttle ac

cess

.

Ris

kRi

sk of

sedim

ent t

rans

port

for tr

ench

ing

Low

Risk

of se

dimen

t tra

nspo

rt for

pipe

jack

ing

Low

Risk

of flo

oding

for t

renc

hing

Low

Risk

of flo

oding

for p

ipe ja

cking

Lo

wCo

nstru

ction

Meth

od

Tren

ching

Miti

gatio

nSt

anda

rd M

anag

emen

t Mea

sure

s Co

nstru

ction

man

agem

ent m

easu

res a

ndOp

erati

on m

anag

emen

t mea

sure

s.Sp

ecific

Mitig

ation

Mi

nimise

site

distur

banc

e; we

ed m

anag

emen

t;re

instat

e ex

cava

ted p

rofile

; rev

egeta

tion.

An

addit

ional

cons

tructe

d dra

in ru

ns di

rectl

y with

inthe

pipe

line a

lignm

ent.

This

is no

t a de

signa

ted

water

way a

ccor

ding t

o MW

C GI

S da

ta lay

ers.

Cros

sing

Numb

er

115

Wate

rway

Nam

e 39

06 T

rib of

390

3W

aterw

ay T

ype

Wate

rcour

se C

hann

el Dr

ainNo

rthing

36

8576

Easti

ng

5738

017

Site

Visit

Com

plete

d Ye

sG

ener

alRe

ceivi

ng W

ater

Wes

tern P

ort

Clas

sifica

tion

Farm

/road

drain

chan

nelis

edCh

anne

l Plan

For

m ch

anne

lised

Catch

ment

Area

(ha)

29

9Ty

pical

Slop

e @ P

OINT

Fla

tGe

ologic

al De

scrip

tion

Fluvia

l: allu

vium,

grav

el, sa

nd, s

iltIn

stre

am fe

atur

esCh

anne

l Widt

h 2.4

mTo

p of B

ank W

idth

7mBa

nk H

eight

1mBa

nk S

hape

Co

nvex

upwa

rds

Chan

nel S

tabilit

y St

able

Bank

Stab

ility

Stab

leFe

ature

s Ni

lFr

eque

ncy o

f Flow

Int

ermi

ttent

Floo

dpla

in F

eatu

res Flo

odpla

in fea

tures

Ni

lFlo

odpla

in W

idth

Unco

nfine

dRi

paria

n Veg

etatio

n Cl

eare

dIns

tream

Veg

etatio

n Ab

sent

Fenc

ed

NoLa

ndus

e Ag

ricult

ural

Flor

a an

d Fa

una

Valu

esTe

rrestr

ial

Intro

duce

d veg

etatio

n, no

habit

at for

sign

ifican

tfau

na.

Aqua

tic F

auna

Aqua

tic H

abita

t No

instr

eam

habit

atC

omm

ents

Comm

ents

Chan

nel m

odifie

d by s

tock.

Leve

e on o

ne si

deon

ly.

Ris

kRi

sk of

sedim

ent t

rans

port

for tr

ench

ing

Low

Risk

of se

dimen

t tra

nspo

rt for

pipe

jack

ing

Low

Risk

of flo

oding

for t

renc

hing

Low

Risk

of flo

oding

for p

ipe ja

cking

Lo

wCo

nstru

ction

Meth

od

Tren

ching

Miti

gatio

nSt

anda

rd M

anag

emen

t Mea

sure

s Co

nstru

ction

man

agem

ent m

easu

res a

ndOp

erati

on m

anag

emen

t mea

sure

s.Sp

ecific

Mitig

ation

Mi

nimise

site

distur

banc

e, W

eed m

anag

emen

t,Re

instat

e exc

avate

d pro

file, R

eveg

etatio

n.

Cros

sing

Numb

er

116

Wate

rway

Nam

e 39

03 T

rib of

390

1W

aterw

ay T

ype

Wate

rcour

se C

hann

el Dr

ainNo

rthing

36

8600

Easti

ng

5738

102

Site

Visit

Com

plete

d Ye

sG

ener

alRe

ceivi

ng W

ater

Wes

tern P

ort

Clas

sifica

tion

Farm

/road

drain

chan

nelis

edCh

anne

l Plan

For

m Ch

anne

lised

Catch

ment

Area

(ha)

Typic

al Sl

ope @

POI

NT

FLAT

Geolo

gical

Desc

riptio

n Flu

vial: a

lluviu

m, gr

avel,

sand

, silt

Inst

ream

feat

ures

Chan

nel W

idth

2.4m

Top o

f Ban

k Widt

h 7m

Bank

Heig

ht 1m

Bank

Sha

pe

conv

ex up

ward

sCh

anne

l Stab

ility

unsta

bleBa

nk S

tabilit

y sta

bleFe

ature

s nil

Freq

uenc

y of F

low

Inter

mitte

ntFl

oodp

lain

Fea

ture

s Flood

plain

featur

es

nilFlo

odpla

in W

idth

Unco

nfine

dRi

paria

n Veg

etatio

n Cl

eare

dIns

tream

Veg

etatio

n Ab

sent

Fenc

ed

NoLa

ndus

e Ag

ricult

ural

Flor

a an

d Fa

una

Valu

esTe

rrestr

ialAq

uatic

Fau

naAq

uatic

Hab

itat

Com

men

tsCo

mme

nts

Wes

t pad

dock

boun

ded b

y sma

ll lev

ee. S

parse

teatre

e. C

attle

acce

ss. C

attle

mod

ified

bed.

Ris

kRi

sk of

sedim

ent t

rans

port

for tr

ench

ing

Mediu

mRi

sk of

sedim

ent t

rans

port

for pi

pe ja

cking

Lo

wRi

sk of

flood

ing fo

r tre

nchin

g Lo

wRi

sk of

flood

ing fo

r pipe

jack

ing

Low

Cons

tructi

on M

ethod

Tr

ench

ingM

itiga

tion

Stan

dard

Man

agem

ent M

easu

res

Cons

tructi

on m

anag

emen

t mea

sure

s and

Oper

ation

man

agem

ent m

easu

res

Spec

ific M

itigati

on

Minim

ise si

te dis

turba

nce,

weed

man

agem

ent,

Reins

tate e

xcav

ated p

rofile

, Rev

egeta

tion

Cros

sing

Numb

er

123

Wate

rway

Nam

e Un

name

dW

aterw

ay T

ype

Wate

rcour

se C

hann

el Dr

ainNo

rthing

36

9127

Easti

ng

5738

031

Site

Visit

Com

plete

d Ye

sG

ener

alRe

ceivi

ng W

ater

Clas

sifica

tion

Farm

/road

drain

chan

nelis

edCh

anne

l Plan

For

m Ch

anne

lised

Catch

ment

Area

(ha)

Typic

al Sl

ope @

POI

NTGe

ologic

al De

scrip

tion

Fluvia

l: allu

vium,

grav

el, sa

nd, s

iltIn

stre

am fe

atur

esCh

anne

l Widt

h 0.5

mTo

p of B

ank W

idth

1.2m

Bank

Heig

ht 0.4

mBa

nk S

hape

Ve

rtical

Chan

nel S

tabilit

y St

able

Bank

Stab

ility

Stab

leFe

ature

s Ni

lFr

eque

ncy o

f Flow

Int

ermi

ttent

Floo

dpla

in F

eatu

res Flo

odpla

in fea

tures

Ni

lFlo

odpla

in W

idth

Unco

nfine

dRi

paria

n Veg

etatio

n Cl

eare

dIns

tream

Veg

etatio

n Ab

sent

Fenc

ed

on ea

stern

side

Land

use

Agric

ultur

alFl

ora

and

Faun

a Va

lues

Terre

strial

No

habit

at for

sign

ifican

t faun

a.Aq

uatic

Fau

naAq

uatic

Hab

itat

No in

strea

m ha

bitat

Com

men

tsCo

mmen

ts Tr

ansfe

r pipe

line a

lignm

ent r

uns p

arall

el to

farm

drain

for s

ever

al hu

nder

ed m

etres

.

Ris

kRi

sk of

sedim

ent t

rans

port

for tr

ench

ing

Mediu

mRi

sk of

sedim

ent t

rans

port

for pi

pe ja

cking

Me

dium

Risk

of flo

oding

for t

renc

hing

Low

Risk

of flo

oding

for p

ipe ja

cking

Lo

wCo

nstru

ction

Meth

od

Tren

ching

and m

ove a

lignm

ent 2

0m so

uthM

itiga

tion

Stan

dard

Man

agem

ent M

easu

res

Cons

tructi

on m

anag

emen

t mea

sure

s and

Oper

ation

man

agem

ent m

easu

res

Spec

ific M

itigati

on

Minim

ise si

te dis

turba

nce,

weed

man

agem

ent,

Reins

tate e

xcav

ated p

rofile

, Rev

egeta

tion

Cros

sing

Numb

er

124

Wate

rway

Nam

eW

aterw

ay T

ype

Wate

rcour

se C

hann

el Dr

ainNo

rthing

36

9474

Easti

ng

5737

992

Site

Visit

Com

plete

d Ye

sG

ener

alRe

ceivi

ng W

ater

Clas

sifica

tion

Unco

nfine

d cha

nneli

sed w

aterw

ayCh

anne

l Plan

For

m Ch

anne

lised

Catch

ment

Area

(ha)

Typic

al Sl

ope @

POI

NT

58Ge

ologic

al De

scrip

tion

Fluvia

l: gu

lly a

lluviu

m, co

lluviu

m: gr

avel,

sand

,sil

tIn

stre

am fe

atur

esCh

anne

l Widt

h 1m

Top o

f Ban

k Widt

h 2.5

mBa

nk H

eight

0.5m

Bank

Sha

pe

Vertic

alCh

anne

l Stab

ility

Stab

leBa

nk S

tabilit

y St

able

Featu

res

Some

upstr

eam

slum

ping,

small

patc

h of

expo

sed

earth

at c

ross

ingFr

eque

ncy o

f Flow

Ep

heme

ral

Floo

dpla

in F

eatu

res Flo

odpla

in fea

tures

Ni

lFlo

odpla

in W

idth

Unco

nfine

dRi

paria

n Veg

etatio

n Ti-

tree

Instre

am V

egeta

tion

Abse

ntFe

nced

on

wes

tern s

ideLa

ndus

e Ro

ad re

serve

- gr

azing

Flor

a an

d Fa

una

Valu

esTe

rrestr

ial

No ha

bitat

for si

gnific

ant fa

una.

Aqua

tic F

auna

Aqua

tic H

abita

t No

instr

eam

habit

atC

omm

ents

Comm

ents

Tran

sfer p

ipelin

e alig

nmen

t run

s par

allel

to fa

rmdr

ain fo

r sev

eral

hund

ered

metr

es.

Ris

kRi

sk of

sedim

ent t

rans

port

for tr

ench

ing

Mediu

mRi

sk of

sedim

ent t

rans

port

for pi

pe ja

cking

Me

dium

Risk

of flo

oding

for t

renc

hing

Low

Risk

of flo

oding

for p

ipe ja

cking

Lo

wCo

nstru

ction

Meth

od

Tren

ching

and m

ove a

lignm

ent 2

0m so

uthM

itiga

tion

Stan

dard

Man

agem

ent M

easu

res

Cons

tructi

on m

anag

emen

t mea

sure

s and

Oper

ation

man

agem

ent m

easu

res

Spec

ific M

itigati

on

Minim

ise si

te dis

turba

nce,

weed

man

agem

ent,

Reins

tate e

xcav

ated p

rofile

, Rev

egeta

tion

Cros

sing

Numb

er

121

Wate

rway

Nam

e Un

name

dW

aterw

ay T

ype

Wate

rcour

se S

tream

North

ing

3700

71Ea

sting

57

3842

8Si

te Vi

sit C

omple

ted

NoG

ener

alRe

ceivi

ng W

ater

Wes

tern P

ort

Clas

sifica

tion

Farm

/road

drain

chan

nelis

edCh

anne

l Plan

For

m St

raigh

tCa

tchme

nt Ar

ea (h

a)

255

Typic

al Sl

ope @

POI

NTGe

ologic

al De

scrip

tion

Fluvia

l: gu

lly a

lluviu

m, co

lluviu

m: gr

avel,

sand

,sil

tIn

stre

am fe

atur

esCh

anne

l Widt

hTo

p of B

ank W

idth

~1m

Bank

Heig

htBa

nk S

hape

un

spec

ified

Chan

nel S

tabilit

y un

spec

ified

Bank

Stab

ility

Featu

res

Freq

uenc

y of F

low

unsp

ecifie

dFl

oodp

lain

Fea

ture

s Flood

plain

featur

esFlo

odpla

in W

idth

Unco

nfine

dRi

paria

n Veg

etatio

n Cl

eare

dIns

tream

Veg

etatio

n Ab

sent

Fenc

ed

NoLa

ndus

e Ag

ricult

ural

Flor

a an

d Fa

una

Valu

esTe

rrestr

ial

Intro

duce

d veg

etatio

n, no

habit

at for

sign

ifican

tfau

na.

Aqua

tic F

auna

Aqua

tic H

abita

tC

omm

ents

Comm

ents

Eros

ion e

viden

t dow

nstre

am al

ong B

ass G

asali

gnme

nt. B

ound

by ro

ad do

wnstr

eam.

No

site

imag

e av

aila

ble

at th

is tim

e

Ris

kRi

sk of

sedim

ent t

rans

port

for tr

ench

ing

Low

Risk

of se

dimen

t tra

nspo

rt for

pipe

jack

ing

Low

Risk

of flo

oding

for t

renc

hing

Low

Risk

of flo

oding

for p

ipe ja

cking

Lo

wCo

nstru

ction

Meth

od

Tren

ching

Miti

gatio

nSt

anda

rd M

anag

emen

t Mea

sure

s Co

nstru

ction

man

agem

ent m

easu

res a

ndOp

erati

on m

anag

emen

t mea

sure

sSp

ecific

Mitig

ation

Mi

nimise

site

distur

banc

e, we

ed m

anag

emen

t,Re

instat

e exc

avate

d pro

file, R

eveg

etatio

n

Cros

sing

Numb

er

219

Wate

rway

Nam

e 39

07 T

rib of

390

3W

aterw

ay T

ype

Wate

rcour

se C

hann

el Dr

ainNo

rthing

37

0336

Easti

ng

5739

088

Site

Visit

Com

plete

d Ye

sG

ener

alRe

ceivi

ng W

ater

Wes

tern P

ort

Clas

sifica

tion

Unco

nfine

d Cha

nneli

sed W

aterw

ayCh

anne

l Plan

For

m Ch

anne

lised

Catch

ment

Area

(ha)

36

4Ty

pical

Slop

e @ P

OINT

17

0Ge

ologic

al De

scrip

tion

Fluvia

l: allu

vium,

grav

el, sa

nd, s

iltIn

stre

am fe

atur

esCh

anne

l Widt

h 1m

Top o

f Ban

k Widt

h 5m

Bank

Heig

ht 2.5

mBa

nk S

hape

Co

mpou

nd st

eppe

d dep

ositio

nal

Chan

nel S

tabilit

y Inc

ising

Bank

Stab

ility

Erod

ingFe

ature

s La

rge a

moun

ts of

slump

ing an

d acti

ve in

cision

.Ar

eas u

pstre

am ar

e und

ercu

t.Fr

eque

ncy o

f Flow

Ep

heme

ral

Floo

dpla

in F

eatu

res Flo

odpla

in fea

tures

Ni

lFlo

odpla

in W

idth

Unco

nfine

dRi

paria

n Veg

etatio

n Sc

atter

ed T

i-tree

Instre

am V

egeta

tion

Abse

ntFe

nced

no

rth -

side

Land

use

Agric

ultur

alFl

ora

and

Faun

a Va

lues

Terre

strial

Aqua

tic F

auna

No

thre

atene

d fish

spec

ies re

cord

ed.

Aqua

tic H

abita

tC

omm

ents

Comm

ents

Bridg

e up

strea

m. U

pstre

am un

dercu

tting.

Ban

ksve

ry un

stable

.

Ris

kRi

sk of

sedim

ent t

rans

port

for tr

ench

ing

Mediu

mRi

sk of

sedim

ent t

rans

port

for pi

pe ja

cking

Lo

wRi

sk of

flood

ing fo

r tre

nchin

g Me

dium

Risk

of flo

oding

for p

ipe ja

cking

Lo

wCo

nstru

ction

Meth

od

Tren

ching

if ch

ange

d to p

erpe

ndicu

lar al

ignme

ntM

itiga

tion

Stan

dard

Man

agem

ent M

easu

res

Cons

tructi

on m

anag

emen

t mea

sure

s and

Oper

ation

man

agem

ent m

easu

res

Spec

ific M

itigati

on

Minim

ise si

te dis

turba

nce,

Cros

sing w

aterw

aype

rpen

dicula

r to a

lignm

ent, P

lacem

ent o

f clea

nro

ck fo

r wor

king p

latfor

m, S

tream

flow

diver

sion

meas

ures

, Avo

id lev

ee ba

nks,

Cons

tructi

on of

tempo

rary

levee

bank

s, W

eed m

anag

emen

t,Fe

ncing

Cros

sing

Numb

er

220

Wate

rway

Nam

eW

aterw

ay T

ype

Wate

rcour

se S

tream

North

ing

3712

36Ea

sting

57

4046

3Si

te Vi

sit C

omple

ted

NoG

ener

alRe

ceivi

ng W

ater

Wes

tern P

ort

Clas

sifica

tion

Partia

lly C

onfin

ed C

hann

elise

d Wate

rway

sCh

anne

l Plan

For

m Ch

anne

lised

Catch

ment

Area

(ha)

37

Typic

al Sl

ope @

POI

NT

35Ge

ologic

al De

scrip

tion

Fluvia

l: allu

vium,

grav

el, sa

nd, s

iltIn

stre

am fe

atur

esCh

anne

l Widt

hTo

p of B

ank W

idth

~1m

Bank

Heig

htBa

nk S

hape

Chan

nel S

tabilit

yBa

nk S

tabilit

yFe

ature

sFr

eque

ncy o

f Flow

Floo

dpla

in F

eatu

res Flo

odpla

in fea

tures

Pa

leoch

anne

lFlo

odpla

in W

idth

Ripa

rian V

egeta

tion

Clea

red

Instre

am V

egeta

tion

Abse

ntFe

nced

No

Land

use

Agric

ultur

alFl

ora

and

Faun

a Va

lues

Terre

strial

Int

rodu

ced v

egeta

tion,

no ha

bitat

for si

gnific

ant

fauna

.Aq

uatic

Fau

naAq

uatic

Hab

itat

Com

men

tsCo

mme

nts

Evide

nce o

f cha

nneli

satio

n to

create

curre

ntch

anne

l alig

nmen

t. Ba

ss G

as al

ignme

nt vis

ible.

Prop

osed

pipe

cros

ses o

n an

angle

to th

ech

anne

l. W

ould

prefe

r to c

ross

perp

endic

ular t

oflo

w to

avoid

eros

ion. C

ulver

t ups

tream

with

road

would

act a

s a co

ntrol.

Sma

ll catc

hmen

t.Po

tentia

l dam

age t

o roa

d. W

ould

reco

mmen

d 1be

nd in

the p

ipe, r

ather

than

the t

wo cu

rrentl

ypr

opos

ed

No

site

imag

e av

aila

ble

at th

is tim

e

Ris

kRi

sk of

sedim

ent t

rans

port

for tr

ench

ing

Low

Risk

of se

dimen

t tra

nspo

rt for

pipe

jack

ing

Low

Risk

of flo

oding

for t

renc

hing

Low

Risk

of flo

oding

for p

ipe ja

cking

Lo

wCo

nstru

ction

Meth

od

Tren

ching

Miti

gatio

nSt

anda

rd M

anag

emen

t Mea

sure

s Co

nstru

ction

man

agem

ent m

easu

res a

ndOp

erati

on m

anag

emen

t mea

sure

s.Sp

ecific

Mitig

ation

Mi

nimise

site

distur

banc

e, Cr

ossin

g wate

rway

perp

endic

ular t

o alig

nmen

t, wee

d man

agem

ent,

reins

tate

exca

vated

pro

file, r

eveg

etatio

n.

Cros

sing

Numb

er

228

Wate

rway

Nam

e Un

name

dW

aterw

ay T

ype

Wate

rcour

se S

tream

North

ing

3713

04Ea

sting

57

4059

4Si

te Vi

sit C

omple

ted

NoG

ener

alRe

ceivi

ng W

ater

Wes

tern P

ort

Clas

sifica

tion

Dam

Chan

nel P

lan F

orm

Catch

ment

Area

(ha)

50

Typic

al Sl

ope @

POI

NT

90Ge

ologic

al De

scrip

tion

Fluvia

l: allu

vium,

grav

el, sa

nd, s

iltIn

stre

am fe

atur

esCh

anne

l Widt

hTo

p of B

ank W

idth

~30m

Bank

Heig

htBa

nk S

hape

Chan

nel S

tabilit

yBa

nk S

tabilit

yFe

ature

sFr

eque

ncy o

f Flow

un

spec

ified

Floo

dpla

in F

eatu

res Flo

odpla

in fea

tures

Flood

plain

Widt

hRi

paria

n Veg

etatio

nIns

tream

Veg

etatio

nFe

nced

No

Land

use

agric

ultur

alFl

ora

and

Faun

a Va

lues

Terre

strial

Aqua

tic F

auna

Aqua

tic H

abita

tC

omm

ents

Comm

ents

Onlin

e Dam

No

site

imag

e av

aila

ble

at th

is tim

e

Ris

kRi

sk of

sedim

ent t

rans

port

for tr

ench

ing

Low

Risk

of se

dimen

t tra

nspo

rt for

pipe

jack

ing

Low

Risk

of flo

oding

for t

renc

hing

Low

Risk

of flo

oding

for p

ipe ja

cking

Lo

wCo

nstru

ction

Meth

od

Tren

ching

Miti

gatio

nSt

anda

rd M

anag

emen

t Mea

sure

s Co

nstru

ction

man

agem

ent m

easu

res a

ndOp

erati

on m

anag

emen

t mea

sure

sSp

ecific

Mitig

ation

Mi

nimise

site

distur

banc

e, pla

ceme

nt of

clean

rock

for w

orkin

g plat

form,

stre

amflo

w div

ersio

nme

asur

es, w

eed m

anag

emen

t, re

instat

eex

cava

ted p

rofile

, rev

egeta

tion

Cros

sing

Numb

er

229

Wate

rway

Nam

e Go

rge C

reek

Wate

rway

Typ

e W

aterco

urse

Stre

amNo

rthing

37

1956

Easti

ng

5741

230

Site

Visit

Com

plete

d Ye

sG

ener

alRe

ceivi

ng W

ater

Wes

tern P

ort

Clas

sifica

tion

Unco

nfine

d Cha

nneli

sed W

aterw

ayCh

anne

l Plan

For

m Ch

anne

lised

Catch

ment

Area

(ha)

30

0Ty

pical

Slop

e @ P

OINT

10

0Ge

ologic

al De

scrip

tion

Fluvia

l: allu

vium,

grav

el, sa

nd, s

iltIn

stre

am fe

atur

esCh

anne

l Widt

h 2m

Top o

f Ban

k Widt

h 15

mBa

nk H

eight

7mBa

nk S

hape

V-

shap

eCh

anne

l Stab

ility

incisi

ngBa

nk S

tabilit

y sta

bleFe

ature

s in-

chan

nel w

oody

debr

is sta

bilisi

ng ch

anne

l.Ba

nk ve

getat

ion st

abilis

ing ba

nks.

Freq

uenc

y of F

low

ephe

mera

lFl

oodp

lain

Fea

ture

s Flood

plain

featur

es

Nil

Flood

plain

Widt

h un

confi

ned

Ripa

rian V

egeta

tion

conti

nuou

s nar

row

strip

of re

mnan

t veg

etatio

nIns

tream

Veg

etatio

n Ab

sent

Fenc

ed

both

sides

Land

use

agric

ultur

al -

graz

ingFl

ora

and

Faun

a Va

lues

Terre

strial

Na

tive S

hrub

s. N

o hab

itat

Aqua

tic F

auna

Aqua

tic H

abita

tC

omm

ents

Com

ments

Ve

ry ste

ep v-

shap

ed ba

nks.

Bas

s gas

tren

ching

reco

ncilia

tion a

ppro

x. 25

m up

strea

m. A

rmou

ring

of ba

nks a

nd st

abilis

ation

of ch

anne

l usin

g ba

salt

rock

s. R

econ

ciliat

ion ap

pear

ed su

cces

sful.

Ris

kRi

sk of

sedim

ent t

rans

port

for tr

ench

ing

Mediu

mRi

sk of

sedim

ent t

rans

port

for pi

pe ja

cking

Lo

wRi

sk of

flood

ing fo

r tre

nchin

g Lo

wRi

sk of

flood

ing fo

r pipe

jack

ing

Low

Cons

tructi

on M

ethod

Tr

ench

ingM

itiga

tion

Stan

dard

Man

agem

ent M

easu

res

Cons

tructi

on m

anag

emen

t mea

sure

s and

Oper

ation

man

agem

ent m

easu

res

Spec

ific M

itigati

on

Minim

ise si

te dis

turba

nce,

cross

ing w

aterw

aype

rpen

dicula

r to a

lignm

ent, w

eed m

anag

emen

t,re

instat

e ex

cava

ted p

rofile

, rev

egeta

tion,

bed

contr

ol wo

rks, fe

ncing

Cros

sing

Numb

er

208

Wate

rway

Nam

eW

aterw

ay T

ype

Wate

rcour

se C

hann

el Dr

ainNo

rthing

37

2539

Easti

ng

5742

004

Site

Visit

Com

plete

d No

Gen

eral

Rece

iving

Wate

r W

ester

n Por

tCl

assif

icatio

n Fa

rm/ro

ad dr

ain ch

anne

lised

Chan

nel P

lan F

orm

Chan

nelis

edCa

tchme

nt Ar

ea (h

a)Ty

pical

Slop

e @ P

OINT

Geolo

gical

Desc

riptio

n Flu

vial: a

lluviu

m, gr

avel,

sand

, silt

Inst

ream

feat

ures

Chan

nel W

idth

Top o

f Ban

k Widt

h ~1

mBa

nk H

eight

Bank

Sha

peCh

anne

l Stab

ility

Bank

Stab

ility

Featu

res

Freq

uenc

y of F

lowFl

oodp

lain

Fea

ture

s Flood

plain

featur

esFlo

odpla

in W

idth

Ripa

rian V

egeta

tion

Clea

red

Instre

am V

egeta

tion

Abse

ntFe

nced

No

Land

use

Agric

ultur

alFl

ora

and

Faun

a Va

lues

Terre

strial

Aqua

tic F

auna

Aqua

tic H

abita

tC

omm

ents

Comm

ents

Top o

f wat

erco

urse

.

No

site

imag

e av

aila

ble

at th

is tim

e

Ris

kRi

sk of

sedim

ent t

rans

port

for tr

ench

ing

Low

Risk

of se

dimen

t tra

nspo

rt for

pipe

jack

ing

Low

Risk

of flo

oding

for t

renc

hing

Low

Risk

of flo

oding

for p

ipe ja

cking

Lo

wCo

nstru

ction

Meth

od

Tren

ching

Miti

gatio

nSt

anda

rd M

anag

emen

t Mea

sure

s Co

nstru

ction

man

agem

ent m

easu

res a

ndOp

erati

on m

anag

emen

t mea

sure

sSp

ecific

Mitig

ation

Mi

nimise

site

distur

banc

e, we

ed m

anag

emen

t,Re

instat

e exc

avate

d pro

file, R

eveg

etatio

n

Cros

sing

Numb

er

230

Wate

rway

Nam

e 33

05 T

rib of

Bas

s Rive

rW

aterw

ay T

ype

Wate

rcour

se S

tream

North

ing

3729

00Ea

sting

57

4243

3Si

te Vi

sit C

omple

ted

Yes

Gen

eral

Rece

iving

Wate

r W

ester

n Por

tCl

assif

icatio

n Pa

rtially

Con

fined

Sinu

ous C

hann

elCh

anne

l Plan

For

m Si

nuou

sCa

tchme

nt Ar

ea (h

a)

192

Typic

al Sl

ope @

POI

NT

43Ge

ologic

al De

scrip

tion

Fluvia

l: allu

vium,

grav

el, sa

nd, s

iltIn

stre

am fe

atur

esCh

anne

l Widt

h 1.5

mTo

p of B

ank W

idth

40m

Bank

Heig

ht 5m

Bank

Sha

pe

conv

ex up

ward

sCh

anne

l Stab

ility

Stab

leBa

nk S

tabilit

y St

able

Featu

res

Run,

well d

efine

d Low

flow

chan

nel w

ith w

ideHi

gh flo

w ch

anne

l.Fr

eque

ncy o

f Flow

Ep

heme

ral

Floo

dpla

in F

eatu

res Flo

odpla

in fea

tures

Fla

tFlo

odpla

in W

idth

Unco

nfine

dRi

paria

n Veg

etatio

n Sc

atter

ed ex

otics

and n

ative

sIns

tream

Veg

etatio

n Ab

sent

Fenc

ed

Yes

Land

use

Agric

ultur

alFl

ora

and

Faun

a Va

lues

Terre

strial

Aqua

tic F

auna

Aqua

tic H

abita

tC

omm

ents

Comm

ents

Road

limitin

g cap

acity

for a

djustm

ent. P

lanfor

mco

ntroll

ed b

y for

mer b

ank h

eight.

Incis

ion a

long

Low

flow

chan

nel h

as oc

curre

d ove

r mor

e rec

ent

times

. Loc

al po

ckets

of e

rosio

n with

in hig

h flow

chan

nel a

nd ba

nks.

Ris

kRi

sk of

sedim

ent t

rans

port

for tr

ench

ing

Mediu

mRi

sk of

sedim

ent t

rans

port

for pi

pe ja

cking

Lo

wRi

sk of

flood

ing fo

r tre

nchin

g Lo

wRi

sk of

flood

ing fo

r pipe

jack

ing

Low

Cons

tructi

on M

ethod

Tr

ench

ingM

itiga

tion

Stan

dard

Man

agem

ent M

easu

res

Cons

tructi

on m

anag

emen

t mea

sure

s and

Oper

ation

man

agem

ent m

easu

res

Spec

ific M

itigati

on

Minim

ise si

te dis

turba

nce,

cross

ing w

aterw

aype

rpen

dicula

r to a

lignm

ent, s

tream

flow

diver

sion

meas

ures

, wee

d man

agem

ent,

reins

tate

exca

vated

pro

file, r

eveg

etatio

n, Re

instat

e with

asta

ble pr

ofile

with

appr

opria

te tr

ansit

ion to

exis

ting

profi

le.

Cros

sing

Numb

er

212

Wate

rway

Nam

e 33

06 T

rib of

Bas

s Rive

rW

aterw

ay T

ype

Wate

rcour

se S

tream

North

ing

3732

24Ea

sting

57

4283

3Si

te Vi

sit C

omple

ted

Yes

Gen

eral

Rece

iving

Wate

r W

ester

n Por

tCl

assif

icatio

n Pa

rtially

Con

fined

Sinu

ous C

hann

elCh

anne

l Plan

For

m Si

nuou

sCa

tchme

nt Ar

ea (h

a)

175

Typic

al Sl

ope @

POI

NT

63Ge

ologic

al De

scrip

tion

Fluvia

l: allu

vium,

grav

el, sa

nd, s

iltIn

stre

am fe

atur

esCh

anne

l Widt

h 0.7

5mTo

p of B

ank W

idth

2.2m

Bank

Heig

ht 0.8

5mBa

nk S

hape

Irr

egula

rCh

anne

l Stab

ility

Stab

leBa

nk S

tabilit

y Lc

oally

unsta

ble d

ue to

stoc

k acc

ess

Featu

res

Pool

run

sequ

ence

Freq

uenc

y of F

low

Pere

nnial

Floo

dpla

in F

eatu

res Flo

odpla

in fea

tures

Te

rrace

Flood

plain

Widt

h 15

mRi

paria

n Veg

etatio

n Cl

eare

dIns

tream

Veg

etatio

n Fil

amen

tous a

lgae

Fenc

ed

NoLa

ndus

e Ag

ricult

ural

Flor

a an

d Fa

una

Valu

esTe

rrestr

ialAq

uatic

Fau

naAq

uatic

Hab

itat

Com

men

tsCo

mmen

ts Er

osion

scar

s alon

g Bas

s Gas

align

men

t not

evide

nt in

field.

Som

e er

osion

on o

utside

bend

san

d loc

alise

d slu

mping

due t

o sto

ck a

cces

s.La

teral

chan

nel m

igrati

on co

nfine

d by s

econ

dter

race

. Cha

nnel

more

likely

to in

cise t

han

later

ally m

igrate

. Tr

ibutar

y clos

e to B

ass R

iver.

Tribu

tary

close

to B

ass R

iver.

Vici

nity o

f Bas

sRi

ver,

incre

ases

impa

ct on

down

strea

m va

lues.

Ris

kRi

sk of

sedim

ent t

rans

port

for tr

ench

ing

Mediu

mRi

sk of

sedim

ent t

rans

port

for pi

pe ja

cking

Me

dium

Risk

of flo

oding

for t

renc

hing

Low

Risk

of flo

oding

for p

ipe ja

cking

Lo

wCo

nstru

ction

Meth

od

Tren

chM

itiga

tion

Stan

dard

Man

agem

ent M

easu

res

Cons

tructi

on m

anag

emen

t mea

sure

s and

Oper

ation

man

agem

ent m

easu

res

Spec

ific M

itigati

on

Minim

ise si

te dis

turba

nce,

cross

ing w

aterw

aype

rpen

dicula

r to a

lignm

ent, s

tream

flow

diver

sion

meas

ures

, wee

d man

agem

ent,

reins

tate

exca

vated

pro

file, D

iversi

on dr

ains a

nd bu

nds f

orwa

ter m

anag

emen

t wee

d man

agem

ent,

reve

getat

ion

Cros

sing

Numb

er

213

Wate

rway

Nam

eW

aterw

ay T

ype

Wate

rcour

se S

tream

North

ing

3733

32Ea

sting

57

4296

6Si

te Vi

sit C

omple

ted

Yes

Gen

eral

Rece

iving

Wate

r W

ester

n Por

tCl

assif

icatio

n Da

mCh

anne

l Plan

For

m N/

ACa

tchme

nt Ar

ea (h

a)

29Ty

pical

Slop

e @ P

OINT

N/

AGe

ologic

al De

scrip

tion

Fluvia

l: allu

vium,

grav

el, sa

nd, s

iltIn

stre

am fe

atur

esCh

anne

l Widt

h N/

ATo

p of B

ank W

idth

N/A

Bank

Heig

ht N/

ABa

nk S

hape

N/

ACh

anne

l Stab

ility

N/A

Bank

Stab

ility

Stab

leFe

ature

s N/

AFr

eque

ncy o

f Flow

N/

AFl

oodp

lain

Fea

ture

s Flood

plain

featur

es

N/A

Flood

plain

Widt

h N/

ARi

paria

n Veg

etatio

n gr

azed

Instre

am V

egeta

tion

macro

phyte

sFe

nced

No

Land

use

agric

ultur

alFl

ora

and

Faun

a Va

lues

Terre

strial

Aqua

tic F

auna

Aqua

tic H

abita

tC

omm

ents

Comm

ents

Cros

sing

throu

gh fa

rm da

m. D

am fe

nced

. Som

ena

tive a

nd in

trodu

ced v

egeta

tion a

roun

d dam

<5m

tall.

Ris

kRi

sk of

sedim

ent t

rans

port

for tr

ench

ing

Low

Risk

of se

dimen

t tra

nspo

rt for

pipe

jack

ing

Low

Risk

of flo

oding

for t

renc

hing

Low

Risk

of flo

oding

for p

ipe ja

cking

Lo

wCo

nstru

ction

Meth

od

Tren

ching

Miti

gatio

nSt

anda

rd M

anag

emen

t Mea

sure

s Co

nstru

ction

man

agem

ent m

easu

res a

ndOp

erati

on m

anag

emen

t mea

sure

sSp

ecific

Mitig

ation

Mi

nimise

site

distur

banc

e, pla

ceme

nt of

clean

rock

for w

orkin

g plat

form,

stre

amflo

w div

ersio

nme

asur

es, w

eed m

anag

emen

t, re

instat

eex

cava

ted p

rofile

, rev

egeta

tion

Cros

sing

Numb

er

214

Wate

rway

Nam

e Un

name

dW

aterw

ay T

ype

Wate

rcour

se S

tream

North

ing

3734

22Ea

sting

57

4307

7Si

te Vi

sit C

omple

ted

Yes

Gen

eral

Rece

iving

Wate

r W

ester

n Por

tCl

assif

icatio

n Un

confi

ned S

inuou

s Wate

rway

Chan

nel P

lan F

orm

Sinu

ous

Catch

ment

Area

(ha)

38

Typic

al Sl

ope @

POI

NT

80Ge

ologic

al De

scrip

tion

Fluvia

l: allu

vium,

grav

el, sa

nd, s

iltIn

stre

am fe

atur

esCh

anne

l Widt

h 1.6

mTo

p of B

ank W

idth

6mBa

nk H

eight

1mBa

nk S

hape

Irr

egula

rCh

anne

l Stab

ility

stable

Bank

Stab

ility

unsta

bleFe

ature

s nil

Freq

uenc

y of F

low

Ephe

mera

lFl

oodp

lain

Fea

ture

s Flood

plain

featur

es

Terra

ceFlo

odpla

in W

idth

unco

nfine

dRi

paria

n Veg

etatio

n Cl

eare

dIns

tream

Veg

etatio

n Ab

sent

Fenc

ed

NoLa

ndus

e ag

ricult

ural

Flor

a an

d Fa

una

Valu

esTe

rrestr

ialAq

uatic

Fau

naAq

uatic

Hab

itat

Com

men

tsCo

mme

nts

Down

strea

m slu

mping

. Pre

vious

ly cro

ssed

byBa

ss G

as -

evide

nce o

f Bas

s Gas

reins

tatem

ent.

Appe

ars t

o be a

n acti

ve ch

anne

l. Te

rrace

sev

ident

. Visi

bly p

oor w

ater q

uality

. Ca

ttle ac

cess

and p

uggin

g ins

tream

. Culv

ert c

ontro

lled

down

strea

m. L

ikely

to be

remn

ant p

ools

durin

gsu

mmer

.

Ris

kRi

sk of

sedim

ent t

rans

port

for tr

ench

ing

Low

Risk

of se

dimen

t tra

nspo

rt for

pipe

jack

ing

Low

Risk

of flo

oding

for t

renc

hing

Low

Risk

of flo

oding

for p

ipe ja

cking

Lo

wCo

nstru

ction

Meth

od

Tren

ching

Miti

gatio

nSt

anda

rd M

anag

emen

t Mea

sure

s Co

nstru

ction

man

agem

ent m

easu

res a

ndOp

erati

on m

anag

emen

t mea

sure

sSp

ecific

Mitig

ation

Do

wnstr

eam

slump

ing. P

revio

usly

cross

ed by

Bass

Gas

- ev

idenc

e of B

ass G

as re

instat

emen

t.Ap

pear

s to b

e an a

ctive

chan

nel.

Terra

ces

evide

nt. V

isibly

poo

r wate

r qua

lity.

Cattle

acce

ssan

d pug

ging i

nstre

am. C

ulver

t con

trolle

ddo

wnstr

eam.

Like

ly to

be re

mnan

t poo

ls du

ring

summ

er.

Cros

sing

Numb

er

231

Wate

rway

Nam

e Te

nnen

t Cre

ekW

aterw

ay T

ype

Wate

rcour

se R

iver

North

ing

3744

90Ea

sting

57

4428

0Si

te Vi

sit C

omple

ted

Yes

Gen

eral

Rece

iving

Wate

r W

ester

n Por

tCl

assif

icatio

n Pa

rtially

Con

fined

Sinu

ous C

hann

elCh

anne

l Plan

For

m Si

nuou

sCa

tchme

nt Ar

ea (h

a)

2057

Typic

al Sl

ope @

POI

NT

200

Geolo

gical

Desc

riptio

n Flu

vial: a

lluviu

m, gr

avel,

sand

, silt

Inst

ream

feat

ures

Chan

nel W

idth

3mTo

p of B

ank W

idth

40m

Bank

Heig

ht 7m

Bank

Sha

pe

conc

ave u

pwar

dsCh

anne

l Stab

ility

stable

Bank

Stab

ility

stable

Featu

res

Freq

uenc

y of F

low

ephe

mera

lFl

oodp

lain

Fea

ture

s Flood

plain

featur

esFlo

odpla

in W

idth

10-1

5mRi

paria

n Veg

etatio

n ex

otics

Instre

am V

egeta

tion

exoti

csFe

nced

No

Land

use

agric

ultur

alFl

ora

and

Faun

a Va

lues

Terre

strial

Na

tive S

hrub

s. N

o hab

itat fo

r sign

ifican

t faun

a.Aq

uatic

Fau

na

No th

reate

ned f

ish sp

ecies

.Aq

uatic

Hab

itat

Refug

e poo

ls.C

omm

ents

Comm

ents

Chan

nel n

ot ac

tively

incis

ing, s

tabilis

ed b

ywi

llows

. Ban

ks st

able,

loca

lised

ero

sion f

rom

cattle

acce

ss. N

o evid

ence

of B

ass g

asre

istate

men

t. Cu

lvert

cont

rolle

d up

strea

m.

Ris

kRi

sk of

sedim

ent t

rans

port

for tr

ench

ing

Mediu

mRi

sk of

sedim

ent t

rans

port

for pi

pe ja

cking

Lo

wRi

sk of

flood

ing fo

r tre

nchin

g Lo

wRi

sk of

flood

ing fo

r pipe

jack

ing

Low

Cons

tructi

on M

ethod

Pi

pe ja

ckM

itiga

tion

Stan

dard

Man

agem

ent M

easu

res

Cons

tructi

on m

anag

emen

t mea

sure

s and

Oper

ation

man

agem

ent m

easu

res

Spec

ific M

itigati

on

Minim

ise si

te dis

turba

nce,

cross

ing w

aterw

aype

rpen

dicula

r to a

lignm

ent, s

tream

flow

diver

sion

meas

ures

, wee

d man

agem

ent,

reins

tate

exca

vated

pro

file, r

eveg

etatio

n

Cros

sing

Numb

er

223

Wate

rway

Nam

e 33

11 T

rib of

Bas

s Rive

rW

aterw

ay T

ype

Wate

rcour

se S

tream

North

ing

3749

37Ea

sting

57

4471

4Si

te Vi

sit C

omple

ted

Yes

Gen

eral

Rece

iving

Wate

r W

ester

n Por

tCl

assif

icatio

n Pa

rtially

Con

fined

Sinu

ous C

hann

elCh

anne

l Plan

For

m sin

uous

Catch

ment

Area

(ha)

45

2Ty

pical

Slop

e @ P

OINT

11

5Ge

ologic

al De

scrip

tion

Fluvia

l: allu

vium,

grav

el, sa

nd, s

iltIn

stre

am fe

atur

esCh

anne

l Widt

h 5m

Top o

f Ban

k Widt

h 11

mBa

nk H

eight

2mBa

nk S

hape

co

nvex

upwa

rds

Chan

nel S

tabilit

y sta

bleBa

nk S

tabilit

y sto

ck m

odifie

dFe

ature

sFr

eque

ncy o

f Flow

ep

heme

ral

Floo

dpla

in F

eatu

res Flo

odpla

in fea

tures

Ni

lFlo

odpla

in W

idth

Unco

nfine

dRi

paria

n Veg

etatio

n Cl

eare

dIns

tream

Veg

etatio

n Ph

ragm

ites a

nd Ju

ncus

Fenc

ed

NoLa

ndus

e ag

ricult

ural

Flor

a an

d Fa

una

Valu

esTe

rrestr

ialAq

uatic

Fau

naAq

uatic

Hab

itat

Com

men

tsCo

mmen

ts No

sign

of B

ass g

as re

instat

emen

t. So

meer

osion

due t

o sto

ck ac

cess

. Rela

tively

deep

lyinc

ised.

Limi

ted f

low.

Ris

kRi

sk of

sedim

ent t

rans

port

for tr

ench

ing

Low

Risk

of se

dimen

t tra

nspo

rt for

pipe

jack

ing

Low

Risk

of flo

oding

for t

renc

hing

Low

Risk

of flo

oding

for p

ipe ja

cking

Lo

wCo

nstru

ction

Meth

od

Tren

ching

Miti

gatio

nSt

anda

rd M

anag

emen

t Mea

sure

s Co

nstru

ction

man

agem

ent m

easu

res a

ndOp

erati

on m

anag

emen

t mea

sure

sSp

ecific

Mitig

ation

Mi

nimise

site

distur

banc

e, cro

ssing

wate

rway

perp

endic

ular t

o alig

nmen

t, stre

amflo

w div

ersio

nme

asur

es, w

eed m

anag

emen

t, re

instat

eex

cava

ted p

rofile

, rev

egeta

tion

Cros

sing

Numb

er

224

Wate

rway

Nam

e Ba

ss R

iver

Wate

rway

Typ

e W

aterco

urse

Rive

rNo

rthing

37

5831

Easti

ng

5745

810

Site

Visit

Com

plete

d No

Gen

eral

Rece

iving

Wate

r W

ester

n Por

tCl

assif

icatio

n Pa

rtially

Con

fined

Sinu

ous C

hann

elCh

anne

l Plan

For

m Si

nuou

sCa

tchme

nt Ar

ea (h

a)

1785

4Ty

pical

Slop

e @ P

OINT

39

0Ge

ologic

al De

scrip

tion

Fluvia

l: allu

vium,

grav

el, sa

nd, s

iltIn

stre

am fe

atur

esCh

anne

l Widt

h 6m

Top o

f Ban

k Widt

h 20

mBa

nk H

eight

5mBa

nk S

hape

Co

nvex

upwa

rds

Chan

nel S

tabilit

y St

able

Bank

Stab

ility

Stab

leFe

ature

s Ru

nFr

eque

ncy o

f Flow

Pe

renn

ialFl

oodp

lain

Fea

ture

s Flood

plain

featur

es

Remn

ant p

erch

ed m

eand

er be

nds/p

rese

rved

oxbo

wsFlo

odpla

in W

idth

Unco

nfine

dRi

paria

n Veg

etatio

n Pa

tches

of re

mnan

t veg

etatio

n and

wee

dsIns

tream

Veg

etatio

n Ma

croph

ytes

Fenc

ed

NoLa

ndus

e Ag

ricult

ural

Flor

a an

d Fa

una

Valu

esTe

rrestr

ialAq

uatic

Fau

na

Austr

alian

Gra

yling

Aqua

tic H

abita

tC

omm

ents

Comm

ents

Chan

nel d

eeply

incis

ed in

to flo

odpla

in. T

heco

ntem

pora

ry ch

anne

l is se

t well

below

the

curre

nt flo

odpla

in lev

el wh

ich is

likely

to be

the

resu

lt of a

comb

inatio

n of in

cision

, tecto

nicpr

oces

ses a

nd se

a lev

el ch

ange

s. T

erra

ces w

ithint

act m

eand

er be

nd cu

toffs/

oxbo

ws si

t on

perch

ed flo

odpla

in. H

igh tu

rbidi

ty in

water

indica

ting s

edim

ent c

onve

yanc

e.

Ris

kRi

sk of

sedim

ent t

rans

port

for tr

ench

ing

Critic

alRi

sk of

sedim

ent t

rans

port

for pi

pe ja

cking

Me

dium

Risk

of flo

oding

for t

renc

hing

Mediu

mRi

sk of

flood

ing fo

r pipe

jack

ing

Low

Cons

tructi

on M

ethod

Pi

pe ja

ckM

itiga

tion

Stan

dard

Man

agem

ent M

easu

res

Cons

tructi

on m

anag

emen

t mea

sure

s and

Oper

ation

man

agem

ent m

easu

res

Spec

ific M

itigati

on

Minim

ise si

te dis

turba

nce,

cross

ing w

aterw

aype

rpen

dicula

r to a

lignm

ent, s

tream

flow

diver

sion

meas

ures

, wee

d man

agem

ent,

reins

tate

exca

vated

pro

file, r

eveg

etatio

n

Cros

sing

Numb

er

225

Wate

rway

Nam

eW

aterw

ay T

ype

Wate

rcour

se S

tream

North

ing

3759

43Ea

sting

57

4614

5Si

te Vi

sit C

omple

ted

NoG

ener

alRe

ceivi

ng W

ater

Wes

tern P

ort

Clas

sifica

tion

Farm

/road

drain

chan

nelis

edCh

anne

l Plan

For

m Ch

anne

lised

Catch

ment

Area

(ha)

3

Typic

al Sl

ope @

POI

NT

480

Geolo

gical

Desc

riptio

n Flu

vial: l

ithic

sand

stone

, silts

tone

, mino

rco

nglom

erate

, coa

lIn

stre

am fe

atur

esCh

anne

l Widt

hTo

p of B

ank W

idth

~1m

Bank

Heig

htBa

nk S

hape

Chan

nel S

tabilit

yBa

nk S

tabilit

yFe

ature

sFr

eque

ncy o

f Flow

Floo

dpla

in F

eatu

res Flo

odpla

in fea

tures

Flood

plain

Widt

hRi

paria

n Veg

etatio

n Cl

eare

dIns

tream

Veg

etatio

n Ab

sent

Fenc

ed

NoLa

ndus

e ag

ricult

ural

Flor

a an

d Fa

una

Valu

esTe

rrestr

ialAq

uatic

Fau

naAq

uatic

Hab

itat

Com

men

tsCo

mmen

ts Pi

pe ru

ns ad

jacen

t to c

hann

el. S

ame c

hann

el as

for si

te 22

6. R

ecom

mend

eith

er av

oiding

chan

nel

or cr

ossin

g pe

rpen

dicula

r to c

hann

el.

No

site

imag

e av

aila

ble

at th

is tim

e

Ris

kRi

sk of

sedim

ent t

rans

port

for tr

ench

ing

Low

Risk

of se

dimen

t tra

nspo

rt for

pipe

jack

ing

Low

Risk

of flo

oding

for t

renc

hing

Low

Risk

of flo

oding

for p

ipe ja

cking

Lo

wCo

nstru

ction

Meth

od

Tren

ching

Miti

gatio

nSt

anda

rd M

anag

emen

t Mea

sure

s Co

nstru

ction

man

agem

ent m

easu

res a

ndOp

erati

on m

anag

emen

t mea

sure

sSp

ecific

Mitig

ation

Mi

nimise

site

distur

banc

e, we

ed m

anag

emen

t,Re

instat

e exc

avate

d pro

file, R

eveg

etatio

n

Cros

sing

Numb

er

226

Wate

rway

Nam

eW

aterw

ay T

ype

Wate

rcour

se S

tream

North

ing

3759

87Ea

sting

57

4631

4Si

te Vi

sit C

omple

ted

NoG

ener

alRe

ceivi

ng W

ater

Wes

tern P

ort

Clas

sifica

tion

Farm

/road

drain

chan

nelis

edCh

anne

l Plan

For

m ch

anne

lised

Catch

ment

Area

(ha)

18

Typic

al Sl

ope @

POI

NT

50Ge

ologic

al De

scrip

tion

Fluvia

l: lith

ic sa

ndsto

ne, s

iltsto

ne, m

inor

cong

lomer

ate, c

oal

Inst

ream

feat

ures

Chan

nel W

idth

Top o

f Ban

k Widt

h ~1

mBa

nk H

eight

Bank

Sha

peCh

anne

l Stab

ility

Bank

Stab

ility

Featu

res

Freq

uenc

y of F

lowFl

oodp

lain

Fea

ture

s Flood

plain

featur

esFlo

odpla

in W

idth

Ripa

rian V

egeta

tion

Clea

red

Instre

am V

egeta

tion

Abse

ntFe

nced

No

Land

use

agric

ultur

alFl

ora

and

Faun

a Va

lues

Terre

strial

Aqua

tic F

auna

Aqua

tic H

abita

tC

omm

ents

Comm

ents

Pipe

runs

adjac

ent t

o cha

nnel.

Sam

e cha

nnel

asfor

site

225.

Rec

omme

nd ei

ther

avoid

ing ch

anne

lor

cros

sing

perp

endic

ular t

o cha

nnel.

No

site

imag

e av

aila

ble

at th

is tim

e

Ris

kRi

sk of

sedim

ent t

rans

port

for tr

ench

ing

Low

Risk

of se

dimen

t tra

nspo

rt for

pipe

jack

ing

Low

Risk

of flo

oding

for t

renc

hing

Low

Risk

of flo

oding

for p

ipe ja

cking

Lo

wCo

nstru

ction

Meth

od

Tren

ching

Miti

gatio

nSt

anda

rd M

anag

emen

t Mea

sure

s Co

nstru

ction

man

agem

ent m

easu

res a

ndOp

erati

on m

anag

emen

t mea

sure

sSp

ecific

Mitig

ation

Mi

nimise

site

distur

banc

e, we

ed m

anag

emen

t,Re

instat

e exc

avate

d pro

file, R

eveg

etatio

n

Cros

sing

Numb

er

227

Wate

rway

Nam

e 33

15 T

rib of

Bas

s Rive

rW

aterw

ay T

ype

Wate

rcour

se S

tream

North

ing

3767

49Ea

sting

57

4629

1Si

te Vi

sit C

omple

ted

NoG

ener

alRe

ceivi

ng W

ater

Wes

tern P

ort

Clas

sifica

tion

Partia

lly C

onfin

ed C

hann

elise

d Wate

rway

sCh

anne

l Plan

For

m ch

anne

lised

Catch

ment

Area

(ha)

10

0Ty

pical

Slop

e @ P

OINT

10

0Ge

ologic

al De

scrip

tion

Fluvia

l: allu

vium,

grav

el, sa

nd, s

iltIn

stre

am fe

atur

esCh

anne

l Widt

hTo

p of B

ank W

idth

Bank

Heig

htBa

nk S

hape

Chan

nel S

tabilit

yBa

nk S

tabilit

yFe

ature

sFr

eque

ncy o

f Flow

Floo

dpla

in F

eatu

res Flo

odpla

in fea

tures

Flood

plain

Widt

hRi

paria

n Veg

etatio

n Cl

eare

dIns

tream

Veg

etatio

n Ab

sent

Fenc

ed

NoLa

ndus

e ag

ricult

ural

Flor

a an

d Fa

una

Valu

esTe

rrestr

ialAq

uatic

Fau

naAq

uatic

Hab

itat

Com

men

tsCo

mmen

ts Bo

und b

y roa

d and

farm

cros

sing.

No

site

imag

e av

aila

ble

at th

is tim

e

Ris

kRi

sk of

sedim

ent t

rans

port

for tr

ench

ing

Low

Risk

of se

dimen

t tra

nspo

rt for

pipe

jack

ing

Low

Risk

of flo

oding

for t

renc

hing

Low

Risk

of flo

oding

for p

ipe ja

cking

Lo

wCo

nstru

ction

Meth

od

Tren

ching

Miti

gatio

nSt

anda

rd M

anag

emen

t Mea

sure

s Co

nstru

ction

man

agem

ent m

easu

res a

ndOp

erati

on m

anag

emen

t mea

sure

sSp

ecific

Mitig

ation

Mi

nimise

site

distur

banc

e, Cr

ossin

g wate

rway

perp

endic

ular t

o alig

nmen

t, wee

d man

agem

ent,

reins

tate

exca

vated

pro

file, r

eveg

etatio

n

Cros

sing

Numb

er

301

Wate

rway

Nam

e Un

name

dW

aterw

ay T

ype

Wate

rcour

se S

tream

North

ing

3769

07Ea

sting

57

4771

8Si

te Vi

sit C

omple

ted

Yes

Gen

eral

Rece

iving

Wate

r W

ester

n Por

tCl

assif

icatio

n Co

nfine

d Hea

dwate

r Cha

nnel

Chan

nel P

lan F

orm

straig

htCa

tchme

nt Ar

ea (h

a)

18Ty

pical

Slop

e @ P

OINT

35

Geolo

gical

Desc

riptio

n Flu

vial: l

ithic

sand

stone

, silts

tone

, mino

rco

nglom

erate

, coa

lIn

stre

am fe

atur

esCh

anne

l Widt

h 2m

Top o

f Ban

k Widt

h 4m

Bank

Heig

ht 0.2

mBa

nk S

hape

co

nvex

upwa

rds

Chan

nel S

tabilit

y St

able

Bank

Stab

ility

Stab

leFe

ature

s nil

Freq

uenc

y of F

low

inter

mitte

ntFl

oodp

lain

Fea

ture

s Flood

plain

featur

es

N/A

Flood

plain

Widt

h N/

ARi

paria

n Veg

etatio

n Cl

eare

dIns

tream

Veg

etatio

n Ab

sent

Fenc

ed

NoLa

ndus

e ag

ricult

ural

Flor

a an

d Fa

una

Valu

esTe

rrestr

ialAq

uatic

Fau

naAq

uatic

Hab

itat

Com

men

tsCo

mmen

ts Ac

cess

road

imme

diatel

y dow

nstre

am.

Fenc

edalo

ng ro

ad, b

ut no

t res

trictin

g stoc

k acc

ess t

owa

terwa

y.

Ris

kRi

sk of

sedim

ent t

rans

port

for tr

ench

ing

Low

Risk

of se

dimen

t tra

nspo

rt for

pipe

jack

ing

Low

Risk

of flo

oding

for t

renc

hing

Low

Risk

of flo

oding

for p

ipe ja

cking

Lo

wCo

nstru

ction

Meth

od

Tren

ching

Miti

gatio

nSt

anda

rd M

anag

emen

t Mea

sure

s Co

nstru

ction

man

agem

ent m

easu

res a

ndOp

erati

on m

anag

emen

t mea

sure

sSp

ecific

Mitig

ation

Mi

nimise

site

distur

banc

e, cro

ssing

wate

rway

perp

endic

ular t

o alig

nmen

t, wee

d man

agem

ent,

reins

tate

exca

vated

pro

file, r

eveg

etatio

n, be

dco

ntrol

works

Cros

sing

Numb

er

302

Wate

rway

Nam

e Un

name

dW

aterw

ay T

ype

Wate

rcour

se S

tream

North

ing

3769

09Ea

sting

57

4779

3Si

te Vi

sit C

omple

ted

Yes

Gen

eral

Rece

iving

Wate

r W

ester

n Por

tCl

assif

icatio

n Pa

rtially

Con

fined

Sinu

ous C

hann

elCh

anne

l Plan

For

m Si

nuou

sCa

tchme

nt Ar

ea (h

a)

53Ty

pical

Slop

e @ P

OINT

42

0Ge

ologic

al De

scrip

tion

Fluvia

l: lith

ic sa

ndsto

ne, s

iltsto

ne, m

inor

cong

lomer

ate, c

oal

Inst

ream

feat

ures

Chan

nel W

idth

3mTo

p of B

ank W

idth

4mBa

nk H

eight

0.8m

Bank

Sha

pe

conv

ex up

ward

sCh

anne

l Stab

ility

Stab

leBa

nk S

tabilit

y St

able

Featu

res

nilFr

eque

ncy o

f Flow

int

ermi

ttent

Floo

dpla

in F

eatu

res Flo

odpla

in fea

tures

ter

race

Flood

plain

Widt

h 80

mRi

paria

n Veg

etatio

n Pa

tches

of re

mnan

t veg

etatio

nIns

tream

Veg

etatio

n Ab

sent

Fenc

ed

NoLa

ndus

e ag

ricult

ural

Flor

a an

d Fa

una

Valu

esTe

rrestr

ialAq

uatic

Fau

naAq

uatic

Hab

itat

Com

men

tsCo

mmen

ts Co

nfine

d by d

am an

d culv

ert u

pstre

am. L

ocali

sed

slum

ping i

n ban

ks du

e to s

tock

acce

ss. P

rese

ntly

stabil

ised b

y ter

restr

ial gr

asse

s. C

hann

elco

nfine

d by t

erra

ce on

left b

ank.

Larg

e tre

e at

cross

ing po

int.

Ris

kRi

sk of

sedim

ent t

rans

port

for tr

ench

ing

Low

Risk

of se

dimen

t tra

nspo

rt for

pipe

jack

ing

Low

Risk

of flo

oding

for t

renc

hing

Low

Risk

of flo

oding

for p

ipe ja

cking

Lo

wCo

nstru

ction

Meth

od

Tren

ching

Miti

gatio

nSt

anda

rd M

anag

emen

t Mea

sure

s Co

nstru

ction

man

agem

ent m

easu

res a

ndOp

erati

on m

anag

emen

t mea

sure

sSp

ecific

Mitig

ation

Mi

nimise

site

distur

banc

e, cro

ssing

wate

rway

perp

endic

ular t

o alig

nmen

t, stre

amflo

w div

ersio

nme

asur

es, w

eed m

anag

emen

t, re

instat

eex

cava

ted p

rofile

, rev

egeta

tion

Cros

sing

Numb

er

303

Wate

rway

Nam

eW

aterw

ay T

ype

Wate

rcour

se S

tream

North

ing

3769

28Ea

sting

57

4794

4Si

te Vi

sit C

omple

ted

Yes

Gen

eral

Rece

iving

Wate

r W

ester

n Por

tCl

assif

icatio

n Pa

rtially

Con

fined

Sinu

ous C

hann

elCh

anne

l Plan

For

m Si

nuou

sCa

tchme

nt Ar

ea (h

a)

80Ty

pical

Slop

e @ P

OINT

63

Geolo

gical

Desc

riptio

n Flu

vial: l

ithic

sand

stone

, silts

tone

, mino

rco

nglom

erate

, coa

lIn

stre

am fe

atur

esCh

anne

l Widt

h 1m

Top o

f Ban

k Widt

h 1m

Bank

Heig

ht 0.5

mBa

nk S

hape

Co

ncav

eCh

anne

l Stab

ility

Erod

ingBa

nk S

tabilit

y Inc

ising

Featu

res

Nil

Freq

uenc

y of F

low

Inter

mitte

ntFl

oodp

lain

Fea

ture

s Flood

plain

featur

es

Terra

ceFlo

odpla

in W

idth

60m

Ripa

rian V

egeta

tion

Clea

red

Instre

am V

egeta

tion

Abse

ntFe

nced

No

Land

use

agric

ultur

alFl

ora

and

Faun

a Va

lues

Terre

strial

Aqua

tic F

auna

Aqua

tic H

abita

t

Com

men

tsCo

mmen

ts Er

osion

at to

e of b

ank.

Imme

diatel

y ups

tream

chan

nel a

t a H

igher

leve

l (inc

ision

occu

ring a

tpip

e cro

ssing

loca

tion).

Fur

ther b

ed e

rosio

n in a

nup

strea

m dir

ectio

n may

occu

r. C

attle

induc

edslu

mpin

g at c

ross

ing lo

catio

n. T

erre

strial

gras

sess

stab

ilising

prev

iously

slum

ped a

reas

.Im

media

tely d

owns

tream

chan

nel in

cised

to 1.

5m.

Down

strea

m ev

idenc

e of b

ank f

ailur

e and

slum

ped t

oe de

posit

s ins

tream

.R

isk

Risk

of se

dimen

t tra

nspo

rt for

tren

ching

Me

dium

Risk

of se

dimen

t tra

nspo

rt for

pipe

jack

ing

Low

Risk

of flo

oding

for t

renc

hing

Low

Risk

of flo

oding

for p

ipe ja

cking

Lo

wCo

nstru

ction

Meth

od

Tren

ching

with

add

itiona

l bed

contr

ol wo

rksM

itiga

tion

Stan

dard

Man

agem

ent M

easu

res

Cons

tructi

on m

anag

emen

t mea

sure

s and

Oper

ation

man

agem

ent m

easu

res

Spec

ific M

itigati

on

Minim

ise si

te dis

turba

nce,

cross

ing w

aterw

aype

rpen

dicula

r to a

lignm

ent, s

tream

flow

diver

sion

meas

ures

, wee

d man

agem

ent,

reins

tate

exca

vated

pro

file, r

eveg

etatio

n, be

d con

trol

works

. Rein

statem

ent s

hould

add

ress

the

down

strea

m he

adwa

rd er

osion

to pr

otect

works

and s

atisf

y stak

ehold

er re

quire

ments

Cros

sing

Numb

er

304

Wate

rway

Nam

eW

aterw

ay T

ype

Wate

rcour

se S

tream

North

ing

3771

03Ea

sting

57

4872

7Si

te Vi

sit C

omple

ted

NoG

ener

alRe

ceivi

ng W

ater

Wes

tern P

ort

Clas

sifica

tion

Confi

ned H

eadw

ater C

hann

elCh

anne

l Plan

For

m Sl

ightly

sinu

ous

Catch

ment

Area

(ha)

40

Typic

al Sl

ope @

POI

NT

36Ge

ologic

al De

scrip

tion

Fluvia

l: lith

ic sa

ndsto

ne, s

iltsto

ne, m

inor

cong

lomer

ate, c

oal

Inst

ream

feat

ures

Chan

nel W

idth

Top o

f Ban

k Widt

h ~2

mBa

nk H

eight

Bank

Sha

pe

unsp

ecifie

dCh

anne

l Stab

ility

Bank

Stab

ility

erod

ing do

wnstr

eam

Featu

res

Freq

uenc

y of F

low

unsp

ecifie

dFl

oodp

lain

Fea

ture

s Flood

plain

featur

esFlo

odpla

in W

idth

Ripa

rian V

egeta

tion

Clea

red

Instre

am V

egeta

tion

Fenc

ed

NoLa

ndus

eFl

ora

and

Faun

a Va

lues

Terre

strial

Aqua

tic F

auna

Aqua

tic H

abita

tC

omm

ents

Comm

ents

No

site

imag

e av

aila

ble

at th

is tim

e

Ris

kRi

sk of

sedim

ent t

rans

port

for tr

ench

ing

Low

Risk

of se

dimen

t tra

nspo

rt for

pipe

jack

ing

Low

Risk

of flo

oding

for t

renc

hing

Low

Risk

of flo

oding

for p

ipe ja

cking

Lo

wCo

nstru

ction

Meth

od

Tren

ching

Miti

gatio

nSt

anda

rd M

anag

emen

t Mea

sure

s Co

nstru

ction

man

agem

ent m

easu

res a

ndOp

erati

on m

anag

emen

t mea

sure

sSp

ecific

Mitig

ation

Mi

nimise

site

distur

banc

e, cro

ssing

wate

rway

perp

endic

ular t

o alig

nmen

t, wee

d man

agem

ent,

reins

tate

exca

vated

pro

file, r

eveg

etatio

n, be

dco

ntrol

works

Cros

sing

Numb

er

305

Wate

rway

Nam

eW

aterw

ay T

ype

Wate

rcour

se S

tream

North

ing

3771

67Ea

sting

57

4877

7Si

te Vi

sit C

omple

ted

NoG

ener

alRe

ceivi

ng W

ater

Wes

tern P

ort

Clas

sifica

tion

Confi

ned H

eadw

ater C

hann

elCh

anne

l Plan

For

m str

aight

Catch

ment

Area

(ha)

39

Typic

al Sl

ope @

POI

NT

38Ge

ologic

al De

scrip

tion

Fluvia

l: lith

ic sa

ndsto

ne, s

iltsto

ne, m

inor

cong

lomer

ate, c

oal

Inst

ream

feat

ures

Chan

nel W

idth

Top o

f Ban

k Widt

hBa

nk H

eight

Bank

Sha

pe

unsp

ecifie

dCh

anne

l Stab

ility

Bank

Stab

ility

erod

ing do

wnstr

eam

Featu

res

Freq

uenc

y of F

low

unsp

ecifie

dFl

oodp

lain

Fea

ture

s Flood

plain

featur

esFlo

odpla

in W

idth

Ripa

rian V

egeta

tion

conti

nuou

s nar

row

strip

of re

mnan

t veg

etatio

nIns

tream

Veg

etatio

nFe

nced

No

Land

use

agric

ultur

alFl

ora

and

Faun

a Va

lues

Terre

strial

Aqua

tic F

auna

Aqua

tic H

abita

tC

omm

ents

Comm

ents

Ris

kRi

sk of

sedim

ent t

rans

port

for tr

ench

ing

Low

Risk

of se

dimen

t tra

nspo

rt for

pipe

jack

ing

Low

Risk

of flo

oding

for t

renc

hing

Low

Risk

of flo

oding

for p

ipe ja

cking

Lo

wCo

nstru

ction

Meth

od

Tren

ching

No

site

imag

e av

aila

ble

at th

is tim

e

Miti

gatio

nSt

anda

rd M

anag

emen

t Mea

sure

s Co

nstru

ction

man

agem

ent m

easu

res a

ndOp

erati

on m

anag

emen

t mea

sure

sSp

ecific

Mitig

ation

Mi

nimise

site

distur

banc

e, cro

ssing

wate

rway

perp

endic

ular t

o alig

nmen

t, wee

d man

agem

ent,

reins

tate

exca

vated

pro

file, r

eveg

etatio

n, be

dco

ntrol

works

Cros

sing

Numb

er

326

Wate

rway

Nam

e Un

name

dW

aterw

ay T

ype

Wate

rcour

se S

tream

North

ing

3771

74Ea

sting

57

4913

9Si

te Vi

sit C

omple

ted

Yes

Gen

eral

Rece

iving

Wate

r W

ester

n Por

tCl

assif

icatio

n Co

nfine

d Hea

dwate

r Cha

nnel

Chan

nel P

lan F

orm

Stra

ight

Catch

ment

Area

(ha)

18

Typic

al Sl

ope @

POI

NT

40Ge

ologic

al De

scrip

tion

Fluvia

l: lith

ic sa

ndsto

ne, s

iltsto

ne, m

inor

cong

lomer

ate, c

oal

Inst

ream

feat

ures

Chan

nel W

idth

2To

p of B

ank W

idth

2Ba

nk H

eight

0.3Ba

nk S

hape

Co

mpun

d with

toe s

edim

ent d

epos

ition

Chan

nel S

tabilit

y St

able

Bank

Stab

ility

Erod

ingFe

ature

s Ni

lFr

eque

ncy o

f Flow

Int

ermi

ttent

Floo

dpla

in F

eatu

res Flo

odpla

in fea

tures

N/

AFlo

odpla

in W

idth

N/A

Ripa

rian V

egeta

tion

Clea

red

Instre

am V

egeta

tion

Abse

ntFe

nced

No

Land

use

agric

ultur

alFl

ora

and

Faun

a Va

lues

Terre

strial

Aqua

tic F

auna

Aqua

tic H

abita

tC

omm

ents

Comm

ents

Risk

of he

adwa

rd er

osion

.R

isk

Risk

of se

dimen

t tra

nspo

rt for

tren

ching

Lo

wRi

sk of

sedim

ent t

rans

port

for pi

pe ja

cking

Lo

wRi

sk of

flood

ing fo

r tre

nchin

g Lo

wRi

sk of

flood

ing fo

r pipe

jack

ing

Low

Cons

tructi

on M

ethod

Tr

ench

ing

Miti

gatio

nSt

anda

rd M

anag

emen

t Mea

sure

s Co

nstru

ction

man

agem

ent m

easu

res a

ndOp

erati

on m

anag

emen

t mea

sure

sSp

ecific

Mitig

ation

Mi

nimise

site

distur

banc

e, cro

ssing

wate

rway

perp

endic

ular t

o alig

nmen

t, wee

d man

agem

ent,

reins

tate

exca

vated

pro

file, r

eveg

etatio

n, be

dco

ntrol

works

. Rein

statem

ent s

hould

addr

ess t

hedo

wnstr

eam

head

ward

eros

ion to

prote

ct wo

rksan

d sat

isfy s

takeh

older

requ

ireme

nts

Cros

sing

Numb

er

327

Wate

rway

Nam

e Un

name

dW

aterw

ay T

ype

Wate

rcour

se S

tream

North

ing

3770

99Ea

sting

57

4920

8Si

te Vi

sit C

omple

tedG

ener

alRe

ceivi

ng W

ater

Clas

sifica

tion

Confi

ned H

eadw

ater C

hann

elCh

anne

l Plan

For

m St

raigh

tCa

tchme

nt Ar

ea (h

a)Ty

pical

Slop

e @ P

OINT

Geolo

gical

Desc

riptio

n Flu

vial: l

ithic

sand

stone

, silts

tone

, mino

rco

nglom

erate

, coa

lIn

stre

am fe

atur

esCh

anne

l Widt

hTo

p of B

ank W

idth

~1.5m

Bank

Heig

htBa

nk S

hape

Chan

nel S

tabilit

yBa

nk S

tabilit

yFe

ature

sFr

eque

ncy o

f Flow

Floo

dpla

in F

eatu

res Flo

odpla

in fea

tures

Flood

plain

Widt

hRi

paria

n Veg

etatio

n Cl

eare

dIns

tream

Veg

etatio

n Ab

sent

Fenc

edLa

ndus

e ag

ricult

ural

Flor

a an

d Fa

una

Valu

esTe

rrestr

ialAq

uatic

Fau

naAq

uatic

Hab

itat

Com

men

tsCo

mmen

ts Ri

sk of

head

ward

eros

ion.

Ris

kRi

sk of

sedim

ent t

rans

port

for tr

ench

ing

Low

Risk

of se

dimen

t tra

nspo

rt for

pipe

jack

ing

Low

Risk

of flo

oding

for t

renc

hing

Low

Risk

of flo

oding

for p

ipe ja

cking

Lo

wCo

nstru

ction

Meth

od

No

site

imag

e av

aila

ble

at th

is tim

e

Miti

gatio

nSt

anda

rd M

anag

emen

t Mea

sure

s Co

nstru

ction

man

agem

ent m

easu

res a

ndOp

erati

on m

anag

emen

t mea

sure

sSp

ecific

Mitig

ation

Mi

nimise

site

distur

banc

e, cro

ssing

wate

rway

perp

endic

ular t

o alig

nmen

t, wee

d man

agem

ent,

reins

tate

exca

vated

pro

file, r

eveg

etatio

n, be

dco

ntrol

works

. Rein

statem

ent s

hould

addr

ess t

hedo

wnstr

eam

head

ward

eros

ion to

prote

ct wo

rksan

d sat

isfy s

takeh

older

requ

ireme

nts

Cros

sing

Numb

er

328

Wate

rway

Nam

e Un

name

dW

aterw

ay T

ype

Wate

rcour

se S

tream

North

ing

3770

59Ea

sting

57

4984

3Si

te Vi

sit C

omple

ted

Yes

Gen

eral

Rece

iving

Wate

r W

ester

n Por

tCl

assif

icatio

n Co

nfine

d Hea

dwate

r Cha

nnel

Chan

nel P

lan F

orm

N/A

Catch

ment

Area

(ha)

Typic

al Sl

ope @

POI

NTGe

ologic

al De

scrip

tion

Fluvia

l: lith

ic sa

ndsto

ne, s

iltsto

ne, m

inor

cong

lomer

ate, c

oal

Inst

ream

feat

ures

Chan

nel W

idth

N/A

Top o

f Ban

k Widt

h N/

ABa

nk H

eight

N/A

Bank

Sha

pe

N/A

Chan

nel S

tabilit

y sta

bleBa

nk S

tabilit

y sta

bleFe

ature

s Ni

lFr

eque

ncy o

f Flow

Int

ermi

ttent

Floo

dpla

in F

eatu

res Flo

odpla

in fea

tures

N/

AFlo

odpla

in W

idth

N/A

Ripa

rian V

egeta

tion

Clea

red

Instre

am V

egeta

tion

Abse

ntFe

nced

No

Land

use

agric

ultur

alFl

ora

and

Faun

a Va

lues

Terre

strial

Aqua

tic F

auna

Aqua

tic H

abita

tC

omm

ents

Comm

ents

Dam

imme

diatel

y ups

tream

. Cha

nnel

has n

ode

fined

bed a

nd ba

nks.

Ris

kRi

sk of

sedim

ent t

rans

port

for tr

ench

ing

Low

Risk

of se

dimen

t tra

nspo

rt for

pipe

jack

ing

Low

Risk

of flo

oding

for t

renc

hing

Low

Risk

of flo

oding

for p

ipe ja

cking

Lo

wCo

nstru

ction

Meth

od

Tren

ching

Miti

gatio

nSt

anda

rd M

anag

emen

t Mea

sure

s Co

nstru

ction

man

agem

ent m

easu

res a

ndOp

erati

on m

anag

emen

t mea

sure

sSp

ecific

Mitig

ation

Mi

nimise

site

distur

banc

e, pla

ceme

nt of

clean

rock

for w

orkin

g plat

form,

stre

amflo

w div

ersio

nme

asur

es, w

eed m

anag

emen

t, re

instat

eex

cava

ted p

rofile

, rev

egeta

tion,

bed c

ontro

l wor

ks

Cros

sing

Numb

er

329

Wate

rway

Nam

e Cr

eek 3

831

Wate

rway

Typ

e W

aterco

urse

Stre

amNo

rthing

37

7186

Easti

ng

5750

796

Site

Visit

Com

plete

d Ye

sG

ener

alRe

ceivi

ng W

ater

Wes

tern P

ort

Clas

sifica

tion

Confi

ned H

eadw

ater C

hann

elCh

anne

l Plan

For

m me

ande

rCa

tchme

nt Ar

ea (h

a)Ty

pical

Slop

e @ P

OINT

90

Geolo

gical

Desc

riptio

n Flu

vial: l

ithic

sand

stone

, silts

tone

, mino

rco

nglom

erate

, coa

lIn

stre

am fe

atur

esCh

anne

l Widt

h 0.5

mTo

p of B

ank W

idth

1.2m

Bank

Heig

ht 0.7

mBa

nk S

hape

ve

rtical

Chan

nel S

tabilit

y inc

ising

Bank

Stab

ility

slum

ping

Featu

res

pools

, run

s, lar

ge w

ood,

cobb

lesFr

eque

ncy o

f Flow

ep

heme

ral

Floo

dpla

in F

eatu

res Flo

odpla

in fea

tures

pa

leoch

anne

lFlo

odpla

in W

idth

20m

Ripa

rian V

egeta

tion

patch

es o

f rem

nant

vege

tation

Instre

am V

egeta

tion

Abse

ntFe

nced

No

Land

use

agric

ultur

alFl

ora

and

Faun

a Va

lues

Terre

strial

Aqua

tic F

auna

Aqua

tic H

abita

tC

omm

ents

Comm

ents

Eros

ion d

owns

tream

, dee

ply in

cised

to be

d in

place

s (wi

th mu

dston

e/san

dsto

ne pr

otrus

ions).

Tribu

tary

enter

s imm

ediat

ely do

wnstr

eam.

Toe

depo

sits i

nstre

am fr

om sl

umpe

d mat

erial

.Mi

grati

ng be

nd im

media

tely u

pstre

am. L

ikely

topo

se ris

k to t

he as

set.

Move

align

ment

East

appr

oxim

ately

150m

.

Ris

kRi

sk of

sedim

ent t

rans

port

for tr

ench

ing

Mediu

mRi

sk of

sedim

ent t

rans

port

for pi

pe ja

cking

Me

dium

Risk

of flo

oding

for t

renc

hing

Low

Risk

of flo

oding

for p

ipe ja

cking

Lo

wCo

nstru

ction

Meth

od

Pipe

jack

or tr

ench

if mo

ve al

ignme

nt ea

stap

prox

imat

ely 15

0m.

Miti

gatio

nSt

anda

rd M

anag

emen

t Mea

sure

s Co

nstru

ction

man

agem

ent m

easu

res a

ndOp

erati

on m

anag

emen

t mea

sure

sSp

ecific

Mitig

ation

Mi

nimise

site

distur

banc

e, cro

ssing

wate

rway

perp

endic

ular t

o alig

nmen

t, wee

d man

agem

ent,

reins

tate

exca

vated

pro

file, r

eveg

etatio

n, be

dco

ntrol

works

, rein

state

with

a sta

ble pr

ofile

with

appr

opria

te tr

ansit

ion to

exist

ing pr

ofile

and

contr

ol sto

ck ac

cess

.

Cros

sing

Numb

er

319

Wate

rway

Nam

eW

aterw

ay T

ype

Wate

rcour

se S

tream

North

ing

3772

33Ea

sting

57

5105

1Si

te Vi

sit C

omple

ted

Yes

Gen

eral

Rece

iving

Wate

r W

ester

n Por

tCl

assif

icatio

n Co

nfine

d Hea

dwate

r Cha

nnel

Chan

nel P

lan F

orm

Stra

ight

Catch

ment

Area

(ha)

Typic

al Sl

ope @

POI

NT

7Ge

ologic

al De

scrip

tion

Fluvia

l: lith

ic sa

ndsto

ne, s

iltsto

ne, m

inor

cong

lomer

ate, c

oal

Inst

ream

feat

ures

Chan

nel W

idth

0.5m

Top o

f Ban

k Widt

h 1.5

mBa

nk H

eight

0.5m

Bank

Sha

pe

conv

ex up

ward

sCh

anne

l Stab

ility

incisi

ngBa

nk S

tabilit

y sta

bleFe

ature

s cro

ssing

at up

strea

m ex

tent o

f hea

dwar

d ero

sion

Freq

uenc

y of F

low

inter

mitte

ntFl

oodp

lain

Fea

ture

s Flood

plain

featur

es

N/A

Flood

plain

Widt

h N/

ARi

paria

n Veg

etatio

n Cl

eare

dIns

tream

Veg

etatio

n Ab

sent

Fenc

ed

NoLa

ndus

e ag

ricult

ural

- gra

zing

Flor

a an

d Fa

una

Valu

esTe

rrestr

ialAq

uatic

Fau

naAq

uatic

Hab

itat

Com

men

tsCo

mmen

ts Cr

osse

s cha

nnel

appr

oxim

ately

15m

upstr

eam

ofda

m. H

eadw

ard e

rosio

n at p

ropo

sed c

ross

ingsit

e. Tw

o pre

vious

ly un

identi

fied m

inor w

aterw

aycro

ssing

s lie

withi

n 100

m on

the s

outhe

rn si

de of

the d

am.

Ris

kRi

sk of

sedim

ent t

rans

port

for tr

ench

ing

Low

Risk

of se

dimen

t tra

nspo

rt for

pipe

jack

ing

Low

Risk

of flo

oding

for t

renc

hing

Low

Risk

of flo

oding

for p

ipe ja

cking

Lo

wCo

nstru

ction

Meth

od

Tren

ching

Miti

gatio

nSt

anda

rd M

anag

emen

t Mea

sure

s Co

nstru

ction

man

agem

ent m

easu

res a

ndOp

erati

on m

anag

emen

t mea

sure

sSp

ecific

Mitig

ation

Mi

nimise

site

distur

banc

e, cro

ssing

wate

rway

perp

endic

ular t

o alig

nmen

t, wee

d man

agem

ent,

reins

tate

exca

vated

pro

file, r

eveg

etatio

n, be

dco

ntrol

works

Cros

sing

Numb

er

320

Wate

rway

Nam

e Tr

ib of

3831

Wate

rway

Typ

e W

aterco

urse

Stre

amNo

rthing

37

6854

Easti

ng

5751

324

Site

Visit

Com

plete

d Ye

sG

ener

alRe

ceivi

ng W

ater

Wes

tern P

ort

Clas

sifica

tion

Confi

ned H

eadw

ater C

hann

elCh

anne

l Plan

For

m St

raigh

tCa

tchme

nt Ar

ea (h

a)

65Ty

pical

Slop

e @ P

OINT

20

Geolo

gical

Desc

riptio

n Flu

vial: s

and,

silt, g

rave

l, fer

rugin

ous s

and

Inst

ream

feat

ures

Chan

nel W

idth

0.5m

Top o

f Ban

k Widt

h 1m

Bank

Heig

ht 0.4

mBa

nk S

hape

ve

rtical

Chan

nel S

tabilit

y inc

ising

Bank

Stab

ility

stable

Featu

res

nilFr

eque

ncy o

f Flow

int

ermi

ttent

Floo

dpla

in F

eatu

res Flo

odpla

in fea

tures

N/

AFlo

odpla

in W

idth

N/A

Ripa

rian V

egeta

tion

Patch

es of

remn

ant v

egeta

tion

Instre

am V

egeta

tion

Patch

es of

junc

usFe

nced

No

Land

use

Agric

ultur

al - g

razin

gFl

ora

and

Faun

a Va

lues

Terre

strial

Re

mnan

t Euc

alypts

, Swi

ft Par

rots

poss

ible.

Aqua

tic F

auna

Aqua

tic H

abita

t Un

likely

to pr

ovide

instr

eam

habit

at.C

omm

ents

Comm

ents

Well

vege

tated

. Clos

e to c

onflu

ence

with

ephe

mera

l wate

rway

383

1. He

adwa

rd er

osion

down

strea

m of

cross

ing. C

ulvert

and

farm

ers

track

cros

sing i

mmed

iately

dow

nstre

am of

pipeli

ne cr

ossin

g.

Ris

kRi

sk of

sedim

ent t

rans

port

for tr

ench

ing

Low

Risk

of se

dimen

t tra

nspo

rt for

pipe

jack

ing

Low

Risk

of flo

oding

for t

renc

hing

Low

Risk

of flo

oding

for p

ipe ja

cking

Lo

wCo

nstru

ction

Meth

od

Tren

ching

and

mov

e alig

nmen

t eas

t awa

y fro

mda

m.M

itiga

tion

Stan

dard

Man

agem

ent M

easu

res

Cons

tructi

on m

anag

emen

t mea

sure

s and

Oper

ation

man

agem

ent m

easu

res

Spec

ific M

itigati

on

Minim

ise si

te dis

turba

nce,

cross

ing w

aterw

aype

rpen

dicula

r to a

lignm

ent, w

eed m

anag

emen

t,re

instat

e ex

cava

ted p

rofile

, rev

egeta

tion,

bed

contr

ol wo

rks

Cros

sing

Numb

er

321

Wate

rway

Nam

e Un

name

dW

aterw

ay T

ype

Wate

rcour

se S

tream

North

ing

3767

98Ea

sting

57

5138

1Si

te Vi

sit C

omple

ted

NoG

ener

alRe

ceivi

ng W

ater

Wes

tern P

ort

Clas

sifica

tion

Confi

ned H

eadw

ater C

hann

elCh

anne

l Plan

For

m St

raigh

tCa

tchme

nt Ar

ea (h

a)

33Ty

pical

Slop

e @ P

OINT

20

Geolo

gical

Desc

riptio

n Flu

vial: s

and,

silt, g

rave

l, fer

rugin

ous s

and

Inst

ream

feat

ures

Chan

nel W

idth

0.5m

Top o

f Ban

k Widt

h 2.5

mBa

nk H

eight

0.5m

Bank

Sha

pe

conv

ex up

ward

Chan

nel S

tabilit

y sta

bleBa

nk S

tabilit

y sta

bleFe

ature

s wo

ody d

ebris

acro

ss ch

anne

lFr

eque

ncy o

f Flow

un

spec

ified

Floo

dpla

in F

eatu

res Flo

odpla

in fea

tures

N/

AFlo

odpla

in W

idth

N/A

Ripa

rian V

egeta

tion

patch

es o

f rem

nant

vege

tation

Instre

am V

egeta

tion

Patch

es of

junc

usFe

nced

ye

s - 5m

from

right

bank

Land

use

agric

ultur

alFl

ora

and

Faun

a Va

lues

Terre

strial

Aqua

tic F

auna

Aqua

tic H

abita

tC

omm

ents

Comm

ents

Well

vege

tated

. Hea

dwar

d ero

sion i

mmed

iately

down

strea

m. C

onflu

ence

with

incis

ed e

phem

eral

water

way 3

831

appr

oxim

ately

50m

down

strea

m.R

isk

Risk

of se

dimen

t tra

nspo

rt for

tren

ching

Lo

wRi

sk of

sedim

ent t

rans

port

for pi

pe ja

cking

Lo

wRi

sk of

flood

ing fo

r tre

nchin

g Lo

wRi

sk of

flood

ing fo

r pipe

jack

ing

Low

Cons

tructi

on M

ethod

Tr

ench

ing

Miti

gatio

nSt

anda

rd M

anag

emen

t Mea

sure

s Co

nstru

ction

man

agem

ent m

easu

res a

ndOp

erati

on m

anag

emen

t mea

sure

sSp

ecific

Mitig

ation

Mi

nimise

site

distur

banc

e, cro

ssing

wate

rway

perp

endic

ular t

o alig

nmen

t, wee

d man

agem

ent,

reins

tate

exca

vated

pro

file, r

eveg

etatio

n, be

dco

ntrol

works

Cros

sing

Numb

er

322

Wate

rway

Nam

e Un

name

dW

aterw

ay T

ype

Wate

rcour

se S

tream

North

ing

3767

01Ea

sting

57

5144

7Si

te Vi

sit C

omple

ted

Yes

Gen

eral

Rece

iving

Wate

r W

ester

n Por

tCl

assif

icatio

n Co

nfine

d Hea

dwate

r Cha

nnel

Chan

nel P

lan F

orm

Stra

ight

Catch

ment

Area

(ha)

Typic

al Sl

ope @

POI

NT

13Ge

ologic

al De

scrip

tion

Fluvia

l: san

d, sil

t, gra

vel, f

erru

ginou

s san

dIn

stre

am fe

atur

esCh

anne

l Widt

h 0.5

mTo

p of B

ank W

idth

3mBa

nk H

eight

0.5m

Bank

Sha

pe

conv

ex up

ward

Chan

nel S

tabilit

y inc

ising

Bank

Stab

ility

stable

Featu

res

head

ward

eros

ion im

med

iately

dow

nstre

am of

cross

ingFr

eque

ncy o

f Flow

int

ermi

ttent

Floo

dpla

in F

eatu

res Flo

odpla

in fea

tures

ve

hicle

acce

ss tr

ack n

ear c

ross

ingFlo

odpla

in W

idth

N/A

Ripa

rian V

egeta

tion

patch

es o

f rem

nant

vege

tation

Instre

am V

egeta

tion

juncu

s imm

ediat

ely up

strea

mFe

nced

20

m fro

m lef

t ban

kLa

ndus

e ag

ricult

ural

- gra

zing

Flor

a an

d Fa

una

Valu

esTe

rrestr

ialAq

uatic

Fau

naAq

uatic

Hab

itat

Com

men

tsCo

mmen

ts Da

m 30

m up

strea

m. R

isk of

hea

dwar

d ero

sion

exten

ding u

p to d

am.

Ris

kRi

sk of

sedim

ent t

rans

port

for tr

ench

ing

Low

Risk

of se

dimen

t tra

nspo

rt for

pipe

jack

ing

Low

Risk

of flo

oding

for t

renc

hing

Low

Risk

of flo

oding

for p

ipe ja

cking

Lo

wCo

nstru

ction

Meth

od

Tren

ching

Miti

gatio

nSt

anda

rd M

anag

emen

t Mea

sure

s Co

nstru

ction

man

agem

ent m

easu

res a

ndOp

erati

on m

anag

emen

t mea

sure

sSp

ecific

Mitig

ation

Mi

nimise

site

distur

banc

e, cro

ssing

wate

rway

perp

endic

ular t

o alig

nmen

t, wee

d man

agem

ent,

reins

tate

exca

vated

pro

file, r

eveg

etatio

n, be

dco

ntrol

works

Cros

sing

Numb

er

323

Wate

rway

Nam

eW

aterw

ay T

ype

Wate

rcour

se S

tream

North

ing

3764

39Ea

sting

57

5164

9Si

te Vi

sit C

omple

ted

Yes

Gen

eral

Rece

iving

Wate

r W

ester

n Por

tCl

assif

icatio

n Co

nfine

d Hea

dwate

r Cha

nnel

Chan

nel P

lan F

orm

sinuo

usCa

tchme

nt Ar

ea (h

a)

12Ty

pical

Slop

e @ P

OINT

10

Geolo

gical

Desc

riptio

n Flu

vial: s

and,

silt, g

rave

l, fer

rugin

ous s

and

Inst

ream

feat

ures

Chan

nel W

idth

2.5m

Top o

f Ban

k Widt

h 6m

Bank

Heig

ht 1m

Bank

Sha

pe

conv

ex up

ward

sCh

anne

l Stab

ility

stable

Bank

Stab

ility

stable

Featu

res

very

mino

r slum

ping

Freq

uenc

y of F

low

inter

mitte

ntFl

oodp

lain

Fea

ture

s Flood

plain

featur

es

N/A

Flood

plain

Widt

h N/

ARi

paria

n Veg

etatio

n pa

tches

of r

emna

nt na

tive v

egeta

tion

Instre

am V

egeta

tion

scatt

ered

junc

usFe

nced

No

Land

use

agric

ultur

al - g

razin

gFl

ora

and

Faun

a Va

lues

Terre

strial

Aqua

tic F

auna

Aqua

tic H

abita

tC

omm

ents

Comm

ents

Dam

upstr

eam.

Risk

of da

m fai

lure.

If ali

gnme

ntis

move

d awa

y fro

m da

m ris

k will

be re

duce

d and

cross

perp

endic

ular.

Ris

kRi

sk of

sedim

ent t

rans

port

for tr

ench

ing

Low

Risk

of se

dimen

t tra

nspo

rt for

pipe

jack

ing

Low

Risk

of flo

oding

for t

renc

hing

Low

Risk

of flo

oding

for p

ipe ja

cking

Lo

wCo

nstru

ction

Meth

od

Tren

ching

with

align

ment

chan

ge a

way f

rom d

aman

d cro

ss pe

rpen

dicula

r.M

itiga

tion

Stan

dard

Man

agem

ent M

easu

res

Cons

tructi

on m

anag

emen

t mea

sure

s and

Oper

ation

man

agem

ent m

easu

res

Spec

ific M

itigati

on

Minim

ise si

te dis

turba

nce,

cross

ing w

aterw

aype

rpen

dicula

r to a

lignm

ent, w

eed m

anag

emen

t,re

instat

e ex

cava

ted p

rofile

, rev

egeta

tion,

bed

contr

ol wo

rks. I

n add

ition,

if tre

nchin

g occ

urs a

talt

erna

te sit

e rein

state

with

a sta

ble p

rofile

with

appr

opria

te tr

ansit

ion to

exist

ing pr

ofile

and

contr

ol sto

ck ac

cess

.

Cros

sing

Numb

er

340

Wate

rway

Nam

e Un

name

dW

aterw

ay T

ype

Wate

rcour

se C

hann

el Dr

ainNo

rthing

37

4124

Easti

ng

5754

301

Site

Visit

Com

plete

d Ye

sG

ener

alRe

ceivi

ng W

ater

Wes

tern P

ort

Clas

sifica

tion

Farm

/road

drain

chan

nelis

edCh

anne

l Plan

For

m ch

anne

lised

Catch

ment

Area

(ha)

NA

Typic

al Sl

ope @

POI

NT

33Ge

ologic

al De

scrip

tion

Fluvia

l: gra

vel, s

and,

silt

Inst

ream

feat

ures

Chan

nel W

idth

1.2m

Top o

f Ban

k Widt

h 1.7

mBa

nk H

eight

0.4m

Bank

Sha

pe

conv

ex up

ward

Chan

nel S

tabilit

y sta

bleBa

nk S

tabilit

y sta

bleFe

ature

s cu

lvert

at cro

ssing

Freq

uenc

y of F

low

inter

mitte

ntFl

oodp

lain

Fea

ture

s Flood

plain

featur

es

Bass

Hwy

Flood

plain

Widt

h un

confi

ned

Ripa

rian V

egeta

tion

Ti-tre

e, ac

acia

and o

ther

spec

iesIns

tream

Veg

etatio

n ma

croph

ytes

Fenc

ed

yes-

Holde

n pro

ving g

roun

d's pe

rimete

r cyc

lone

fence

10m

from

pro

pose

d alig

nmen

t.La

ndus

e ro

adsid

eFl

ora

and

Faun

a Va

lues

Terre

strial

Aqua

tic F

auna

Aqua

tic H

abita

tC

omm

ents

Comm

ents

Align

ment

runs

down

centr

e of H

olden

pro

ving

grou

nd's

perim

eter s

ecur

ity tr

ack.

Clos

e pro

ximity

to RA

MSAR

Ris

kRi

sk of

sedim

ent t

rans

port

for tr

ench

ing

Mediu

mRi

sk of

sedim

ent t

rans

port

for pi

pe ja

cking

Lo

wRi

sk of

flood

ing fo

r tre

nchin

g Me

dium

Risk

of flo

oding

for p

ipe ja

cking

Lo

wCo

nstru

ction

Meth

od

Tren

ching

Miti

gatio

nSt

anda

rd M

anag

emen

t Mea

sure

s Co

nstru

ction

man

agem

ent m

easu

res a

ndOp

erati

on m

anag

emen

t mea

sure

sSp

ecific

Mitig

ation

Mi

nimise

site

distur

banc

e, we

ed m

anag

emen

t,Re

instat

e exc

avate

d pro

file, R

eveg

etatio

n.Pr

ioritis

e con

struc

tion d

uring

no flo

w pe

riods

and

co-o

rdina

te co

nstru

ction

and

reins

tatem

ent t

omi

nimise

dura

tion o

f exp

osur

e.

Cros

sing

Numb

er

341

Wate

rway

Nam

e Pe

acko

ck D

rain

Wate

rway

Typ

e W

aterco

urse

Stre

amNo

rthing

37

3986

Easti

ng

5755

665

Site

Visit

Com

plete

d Ye

sG

ener

alRe

ceivi

ng W

ater

Wes

tern P

ort

Clas

sifica

tion

Farm

/road

drain

chan

nelis

edCh

anne

l Plan

For

m ch

anne

lised

Catch

ment

Area

(ha)

Typic

al Sl

ope @

POI

NT

170

Geolo

gical

Desc

riptio

n Pa

ludal:

lago

on an

d swa

mp de

posit

s: sil

t, clay

Inst

ream

feat

ures

Chan

nel W

idth

3.5m

Top o

f Ban

k Widt

h 3.5

mBa

nk H

eight

0.5m

Bank

Sha

pe

vertic

alCh

anne

l Stab

ility

stable

Bank

Stab

ility

stable

Featu

res

trans

fer pi

pelin

e cro

ssing

at th

e con

fluen

ce o

f two

major

drain

s with

comp

lex cu

lvert

arra

ngem

ent

Freq

uenc

y of F

low

ephe

mera

lFl

oodp

lain

Fea

ture

s Flood

plain

featur

es

Bass

Hwy

Flood

plain

Widt

h un

confi

ned

Ripa

rian V

egeta

tion

Ti-tre

es &

aca

ciaIns

tream

Veg

etatio

n ma

croph

ytes

Fenc

ed

yes -

Hold

en pr

oving

grou

nd's

cyclo

ne pe

rimete

rcy

clone

fenc

e + ro

ad sa

fety f

ence

Land

use

road

side

Flor

a an

d Fa

una

Valu

esTe

rrestr

ialAq

uatic

Fau

naAq

uatic

Hab

itat

Com

men

tsCo

mmen

ts W

aterw

ay cr

osse

s main

High

way a

nd is

next

tothe

Hold

en p

rovin

g gro

und.

Pote

ntial

for f

loodin

gro

ad. R

AMSA

R sit

e imm

ediat

ely d

owns

tream

.Co

mplex

culve

rt ar

rang

emen

t at c

ross

ing. T

wo90

0mm

culve

rts.

Ris

kRi

sk of

sedim

ent t

rans

port

for tr

ench

ing

Mediu

mRi

sk of

sedim

ent t

rans

port

for pi

pe ja

cking

Lo

wRi

sk of

flood

ing fo

r tre

nchin

g Me

dium

Risk

of flo

oding

for p

ipe ja

cking

Lo

wCo

nstru

ction

Meth

od

Tren

ching

Miti

gatio

nSt

anda

rd M

anag

emen

t Mea

sure

s Co

nstru

ction

man

agem

ent m

easu

res a

ndOp

erati

on m

anag

emen

t mea

sure

sSp

ecific

Mitig

ation

Mi

nimise

site

distur

banc

e, we

ed m

anag

emen

t,Re

instat

e exc

avate

d pro

file, R

eveg

etatio

n.Re

instat

e cu

lvert

syste

ms a

ppro

priat

ely.

Cros

sing

Numb

er

418

Wate

rway

Nam

eW

aterw

ay T

ype

Wate

rcour

se C

hann

el Dr

ainNo

rthing

37

3989

Easti

ng

5755

697

Site

Visit

Com

plete

d Ye

sG

ener

alRe

ceivi

ng W

ater

Wes

tern P

ort

Clas

sifica

tion

Valle

y Fill

Chan

nel P

lan F

orm

N/A

Catch

ment

Area

(ha)

Typic

al Sl

ope @

POI

NT

Flat

Geolo

gical

Desc

riptio

n Pa

ludal:

lago

on an

d swa

mp de

posit

s: sil

t, clay

Inst

ream

feat

ures

Chan

nel W

idth

N/A

Top o

f Ban

k Widt

h N/

ABa

nk H

eight

N/A

Bank

Sha

pe

N/A

Chan

nel S

tabilit

y St

able

Bank

Stab

ility

Stab

leFe

ature

s Ni

lFr

eque

ncy o

f Flow

int

ermi

ttent

Floo

dpla

in F

eatu

res Flo

odpla

in fea

tures

Ni

lFlo

odpla

in W

idth

unco

nfine

dRi

paria

n Veg

etatio

n Cl

eare

dIns

tream

Veg

etatio

n Ab

sent

Fenc

ed

NoLa

ndus

e ag

ricult

ural

Flor

a an

d Fa

una

Valu

esTe

rrestr

ialAq

uatic

Fau

naAq

uatic

Hab

itat

Com

men

tsCo

mmen

ts Bo

und b

y roa

d. N

o defi

ned b

ed a

nd ba

nks.

Telst

ra te

lecom

s buil

ding o

n ali

gnme

nt. R

oads

ideve

getat

ion to

Sou

th E

ast o

f alig

nmen

t. Hi

story

ofloc

al flo

oding

.

Ris

kRi

sk of

sedim

ent t

rans

port

for tr

ench

ing

Low

Risk

of se

dimen

t tra

nspo

rt for

pipe

jack

ing

Low

Risk

of flo

oding

for t

renc

hing

Mediu

mRi

sk of

flood

ing fo

r pipe

jack

ing

Low

Cons

tructi

on M

ethod

Tr

ench

ingM

itiga

tion

Stan

dard

Man

agem

ent M

easu

res

Cons

tructi

on m

anag

emen

t mea

sure

s and

Oper

ation

man

agem

ent m

easu

res

Spec

ific M

itigati

on

Minim

ise si

te dis

turba

nce,

weed

man

agem

ent,

Reins

tate e

xcav

ated p

rofile

, Rev

egeta

tion

Cros

sing

Numb

er

419

Wate

rway

Nam

eW

aterw

ay T

ype

Wate

rcour

se C

hann

el Dr

ainNo

rthing

37

4085

Easti

ng

5756

438

Site

Visit

Com

plete

d Ye

sG

ener

alRe

ceivi

ng W

ater

Wes

tern P

ort

Clas

sifica

tion

Valle

y Fill

Chan

nel P

lan F

orm

N/A

Catch

ment

Area

(ha)

Typic

al Sl

ope @

POI

NT

Flat

Geolo

gical

Desc

riptio

n Pa

ludal:

lago

on an

d swa

mp de

posit

s: sil

t, clay

Inst

ream

feat

ures

Chan

nel W

idth

N/A

Top o

f Ban

k Widt

h N/

ABa

nk H

eight

N/A

Bank

Sha

pe

N/A

Chan

nel S

tabilit

y St

able

Bank

Stab

ility

Stab

leFe

ature

s Ni

lFr

eque

ncy o

f Flow

int

ermi

ttent

Floo

dpla

in F

eatu

res Flo

odpla

in fea

tures

Ni

lFlo

odpla

in W

idth

unco

nfine

dRi

paria

n Veg

etatio

n Cl

eare

dIns

tream

Veg

etatio

n Ab

sent

Fenc

ed

NoLa

ndus

e ag

ricult

ural

Flor

a an

d Fa

una

Valu

esTe

rrestr

ialAq

uatic

Fau

naAq

uatic

Hab

itat

Com

men

tsCo

mmen

tsR

isk

Risk

of se

dimen

t tra

nspo

rt for

tren

ching

Lo

wRi

sk of

sedim

ent t

rans

port

for pi

pe ja

cking

Lo

wRi

sk of

flood

ing fo

r tre

nchin

g Lo

wRi

sk of

flood

ing fo

r pipe

jack

ing

Low

Cons

tructi

on M

ethod

Tr

ench

ing

No

site

imag

e av

aila

ble

at th

is tim

e

Miti

gatio

nSt

anda

rd M

anag

emen

t Mea

sure

s Co

nstru

ction

man

agem

ent m

easu

res a

ndOp

erati

on m

anag

emen

t mea

sure

sSp

ecific

Mitig

ation

Mi

nimise

site

distur

banc

e, we

ed m

anag

emen

t,Re

instat

e exc

avate

d pro

file, R

eveg

etatio

n

Cros

sing

Numb

er

420

Wate

rway

Nam

e Re

d Bluf

f Cre

ekW

aterw

ay T

ype

North

ing

3740

78Ea

sting

57

5646

0Si

te Vi

sit C

omple

ted

Yes

Gen

eral

Rece

iving

Wate

r W

ester

n Por

tCl

assif

icatio

n Un

confi

ned C

hann

elise

d Wate

rway

Chan

nel P

lan F

orm

Chan

nelis

edCa

tchme

nt Ar

ea (h

a)

1803

Typic

al Sl

ope @

POI

NT

220

Geolo

gical

Desc

riptio

n Pa

ludal:

lago

on an

d swa

mp de

posit

s: sil

t, clay

Inst

ream

feat

ures

Chan

nel W

idth

1mTo

p of B

ank W

idth

8mBa

nk H

eight

2.5m

Bank

Sha

pe

Conc

ave

Chan

nel S

tabilit

y St

able

Bank

Stab

ility

Stab

leFe

ature

s Ni

lFr

eque

ncy o

f Flow

ep

heme

ral

Floo

dpla

in F

eatu

res Flo

odpla

in fea

tures

Le

vee

Flood

plain

Widt

h un

confi

ned

Ripa

rian V

egeta

tion

Exoti

cIns

tream

Veg

etatio

n ma

croph

ytes

Fenc

ed

Yes

Land

use

agric

ultur

alFl

ora

and

Faun

a Va

lues

Terre

strial

No

poten

tial h

abita

t for s

ignific

ant fa

una.

Aqua

tic F

auna

No

thre

atene

d fish

spec

ies re

cord

ed.

Aqua

tic H

abita

tC

omm

ents

Comm

ents

Gene

rally

exoti

c ins

tream

and

ripar

ian sp

ecies

.No

cattle

acce

ss. L

evee

pre

sent

down

strea

mfro

m wh

ere p

ipe w

ill cro

ss. L

evee

not p

rese

ntim

media

tely u

pstre

am. C

ross

es w

ater

way o

n a

corn

er.

RAMS

AR si

te im

media

tely d

owns

tream

.

Ris

kRi

sk of

sedim

ent t

rans

port

for tr

ench

ing

Mediu

mRi

sk of

sedim

ent t

rans

port

for pi

pe ja

cking

Me

dium

Risk

of flo

oding

for t

renc

hing

Low

Risk

of flo

oding

for p

ipe ja

cking

Lo

wCo

nstru

ction

Meth

od

Tren

ching

Miti

gatio

nSt

anda

rd M

anag

emen

t Mea

sure

s Co

nstru

ction

man

agem

ent m

easu

res a

ndOp

erati

on m

anag

emen

t mea

sure

sSp

ecific

Mitig

ation

Mi

nimise

site

distur

banc

e, Cr

ossin

g wate

rway

perp

endic

ular t

o alig

nmen

t, Plac

emen

t of c

lean

rock

for w

orkin

g plat

form,

Stre

amflo

w div

ersio

nme

asur

es, A

void

levee

bank

s, Co

nstru

ction

oftem

pora

ry lev

ee ba

nks,

Wee

d man

agem

ent

Cros

sing

Numb

er

421

Wate

rway

Nam

eW

aterw

ay T

ype

Wate

rcour

se C

hann

el Dr

ainNo

rthing

37

4208

Easti

ng

5757

457

Site

Visit

Com

plete

d No

Gen

eral

Rece

iving

Wate

r W

ester

n Por

tCl

assif

icatio

n Fa

rm/ro

ad dr

ain ch

anne

lised

Chan

nel P

lan F

orm

Chan

nelis

edCa

tchme

nt Ar

ea (h

a)

NATy

pical

Slop

e @ P

OINT

80

0Ge

ologic

al De

scrip

tion

Palud

al: la

goon

and s

wamp

depo

sits:

silt, c

layIn

stre

am fe

atur

esCh

anne

l Widt

hTo

p of B

ank W

idth

~4m

Bank

Heig

htBa

nk S

hape

Chan

nel S

tabilit

yBa

nk S

tabilit

yFe

ature

sFr

eque

ncy o

f Flow

Int

ermi

ttent

Floo

dpla

in F

eatu

res Flo

odpla

in fea

tures

Ni

lFlo

odpla

in W

idth

Unco

nfine

dRi

paria

n Veg

etatio

n Ni

lIns

tream

Veg

etatio

nFe

nced

No

Land

use

Agric

ultur

alFl

ora

and

Faun

a Va

lues

Terre

strial

Aqua

tic F

auna

Aqua

tic H

abita

tC

omm

ents

Comm

ents

Prop

osed

pipe

line r

uns p

arall

el to

chan

nel, w

ithin

~10m

. Sug

gest

move

align

ment

west

to av

oidch

anne

l.R

isk

Risk

of se

dimen

t tra

nspo

rt for

tren

ching

Lo

wRi

sk of

sedim

ent t

rans

port

for pi

pe ja

cking

Lo

wRi

sk of

flood

ing fo

r tre

nchin

g Lo

wRi

sk of

flood

ing fo

r pipe

jack

ing

Low

Cons

tructi

on M

ethod

Tr

ench

ing

No

site

imag

e av

aila

ble

at th

is tim

e

Miti

gatio

nSt

anda

rd M

anag

emen

t Mea

sure

s Co

nstru

ction

man

agem

ent m

easu

res a

ndOp

erati

on m

anag

emen

t mea

sure

sSp

ecific

Mitig

ation

Mi

nimise

site

distur

banc

e, we

ed m

anag

emen

t,Re

instat

e exc

avate

d pro

file, R

eveg

etatio

n

Cros

sing

Numb

er

405

Wate

rway

Nam

eW

aterw

ay T

ype

Wate

rcour

se C

hann

el Dr

ainNo

rthing

37

3684

Easti

ng

5757

539

Site

Visit

Com

plete

d No

Gen

eral

Rece

iving

Wate

r W

ester

n Por

tCl

assif

icatio

n Fa

rm/ro

ad dr

ain ch

anne

lised

Chan

nel P

lan F

orm

Chan

nelis

edCa

tchme

nt Ar

ea (h

a)

293

Typic

al Sl

ope @

POI

NT

Flat

Geolo

gical

Desc

riptio

n Pa

ludal:

lago

on an

d swa

mp de

posit

s: sil

t, clay

Inst

ream

feat

ures

Chan

nel W

idth

Top o

f Ban

k Widt

h ~4

mBa

nk H

eight

Bank

Sha

peCh

anne

l Stab

ility

Bank

Stab

ility

Featu

res

Freq

uenc

y of F

low

Inter

mitte

ntFl

oodp

lain

Fea

ture

s Flood

plain

featur

es

Nil

Flood

plain

Widt

h 21

0Ri

paria

n Veg

etatio

n Qr

mIns

tream

Veg

etatio

n Re

cent

Quate

rnar

y swa

mp an

d lag

oona

l dep

osits

,ma

ngro

ve sw

amps

, salt

mar

sh, c

lay, s

ilt, pe

at an

dmu

d.Fe

nced

Land

use

Flor

a an

d Fa

una

Valu

esTe

rrestr

ialAq

uatic

Fau

naAq

uatic

Hab

itat

Com

men

tsCo

mmen

tsR

isk

Risk

of se

dimen

t tra

nspo

rt for

tren

ching

Lo

wRi

sk of

sedim

ent t

rans

port

for pi

pe ja

cking

Lo

wRi

sk of

flood

ing fo

r tre

nchin

g Lo

wRi

sk of

flood

ing fo

r pipe

jack

ing

Low

Cons

tructi

on M

ethod

Tr

ench

ing

No

site

imag

e av

aila

ble

at th

is tim

e

Miti

gatio

nSt

anda

rd M

anag

emen

t Mea

sure

s Co

nstru

ction

man

agem

ent m

easu

res a

ndOp

erati

on m

anag

emen

t mea

sure

sSp

ecific

Mitig

ation

Mi

nimise

site

distur

banc

e, we

ed m

anag

emen

t,Re

instat

e exc

avate

d pro

file, R

eveg

etatio

n

Cros

sing

Numb

er

406

Wate

rway

Nam

eW

aterw

ay T

ype

Wate

rcour

se C

hann

el Dr

ainNo

rthing

37

3391

Easti

ng

5757

743

Site

Visit

Com

plete

d Ye

sG

ener

alRe

ceivi

ng W

ater

Wes

tern P

ort

Clas

sifica

tion

Farm

/road

drain

chan

nelis

edCh

anne

l Plan

For

m Ch

anne

lised

Catch

ment

Area

(ha)

Typic

al Sl

ope @

POI

NT

Flat

Geolo

gical

Desc

riptio

n Flu

vial: s

and,

silt, g

rave

l, fer

rugin

ous s

and

Inst

ream

feat

ures

Chan

nel W

idth

0.25m

Top o

f Ban

k Widt

h 1.2

mBa

nk H

eight

0.25m

Bank

Sha

pe

Conc

ave

Chan

nel S

tabilit

y St

able

Bank

Stab

ility

Stab

leFe

ature

s Ni

lFr

eque

ncy o

f Flow

int

ermi

ttent

Floo

dpla

in F

eatu

res Flo

odpla

in fea

tures

Ni

lFlo

odpla

in W

idth

unco

nfine

dRi

paria

n Veg

etatio

n Cl

eare

dIns

tream

Veg

etatio

n Ab

sent

Fenc

ed

NoLa

ndus

e ag

ricult

ural

Flor

a an

d Fa

una

Valu

esTe

rrestr

ialAq

uatic

Fau

naAq

uatic

Hab

itat

Com

men

tsCo

mmen

ts No

defin

ed be

d and

ban

ks. B

ound

ed by

farm

road

.R

isk

Risk

of se

dimen

t tra

nspo

rt for

tren

ching

Lo

wRi

sk of

sedim

ent t

rans

port

for pi

pe ja

cking

Lo

wRi

sk of

flood

ing fo

r tre

nchin

g Lo

wRi

sk of

flood

ing fo

r pipe

jack

ing

Low

Cons

tructi

on M

ethod

Tr

ench

ing

Miti

gatio

nSt

anda

rd M

anag

emen

t Mea

sure

s Co

nstru

ction

man

agem

ent m

easu

res a

ndOp

erati

on m

anag

emen

t mea

sure

sSp

ecific

Mitig

ation

Mi

nimise

site

distur

banc

e, we

ed m

anag

emen

t,Re

instat

e exc

avate

d pro

file, R

eveg

etatio

n

Cros

sing

Numb

er

407

Wate

rway

Nam

eW

aterw

ay T

ype

Wate

rcour

se C

hann

el Dr

ainNo

rthing

37

3399

Easti

ng

5757

868

Site

Visit

Com

plete

d Ye

sG

ener

alRe

ceivi

ng W

ater

Wes

tern P

ort

Clas

sifica

tion

Farm

/road

drain

chan

nelis

edCh

anne

l Plan

For

m ch

anne

lised

Catch

ment

Area

(ha)

Typic

al Sl

ope @

POI

NT

Flat

Geolo

gical

Desc

riptio

n Flu

vial: s

and,

silt, g

rave

l, fer

rugin

ous s

and

Inst

ream

feat

ures

Chan

nel W

idth

1.5m

Top o

f Ban

k Widt

h 2m

Bank

Heig

ht 0.2

5mBa

nk S

hape

Co

ncav

eCh

anne

l Stab

ility

Stab

leBa

nk S

tabilit

y St

able

Featu

res

Nil

Freq

uenc

y of F

low

inter

mitte

ntFl

oodp

lain

Fea

ture

s Flood

plain

featur

es

Nil

Flood

plain

Widt

h un

confi

ned

Ripa

rian V

egeta

tion

Clea

red

Instre

am V

egeta

tion

Abse

ntFe

nced

No

Land

use

agric

ultur

alFl

ora

and

Faun

a Va

lues

Terre

strial

Aqua

tic F

auna

Aqua

tic H

abita

tC

omm

ents

Comm

ents

80m

down

strea

m of

dam.

Bou

nded

by f

arm

road

.R

isk

Risk

of se

dimen

t tra

nspo

rt for

tren

ching

Lo

wRi

sk of

sedim

ent t

rans

port

for pi

pe ja

cking

Lo

wRi

sk of

flood

ing fo

r tre

nchin

g Lo

wRi

sk of

flood

ing fo

r pipe

jack

ing

Low

Cons

tructi

on M

ethod

Tr

ench

ing

Miti

gatio

nSt

anda

rd M

anag

emen

t Mea

sure

s Co

nstru

ction

man

agem

ent m

easu

res a

ndOp

erati

on m

anag

emen

t mea

sure

sSp

ecific

Mitig

ation

Mi

nimise

site

distur

banc

e, we

ed m

anag

emen

t,Re

instat

e exc

avate

d pro

file, R

eveg

etatio

n

Cros

sing

Numb

er

408

Wate

rway

Nam

eW

aterw

ay T

ype

Wate

rcour

se C

hann

el Dr

ainNo

rthing

37

3407

Easti

ng

5757

992

Site

Visit

Com

plete

d Ye

sG

ener

alRe

ceivi

ng W

ater

Wes

tern P

ort

Clas

sifica

tion

Farm

/road

drain

chan

nelis

edCh

anne

l Plan

For

m ch

anne

lised

Catch

ment

Area

(ha)

13

Typic

al Sl

ope @

POI

NT

Flat

Geolo

gical

Desc

riptio

n Flu

vial: s

and,

silt, g

rave

l, fer

rugin

ous s

and

Inst

ream

feat

ures

Chan

nel W

idth

0.2m

Top o

f Ban

k Widt

h 1.5

mBa

nk H

eight

0.2m

Bank

Sha

pe

Conc

ave

Chan

nel S

tabilit

y St

able

Bank

Stab

ility

Stab

leFe

ature

s Ni

lFr

eque

ncy o

f Flow

int

ermi

ttent

Floo

dpla

in F

eatu

res Flo

odpla

in fea

tures

Ni

lFlo

odpla

in W

idth

unco

nfine

dRi

paria

n Veg

etatio

n Cl

eare

dIns

tream

Veg

etatio

n Ab

sent

Fenc

ed

NoLa

ndus

e ag

ricult

ural

Flor

a an

d Fa

una

Valu

esTe

rrestr

ialAq

uatic

Fau

naAq

uatic

Hab

itat

Com

men

tsCo

mmen

tsR

isk

Risk

of se

dimen

t tra

nspo

rt for

tren

ching

Lo

wRi

sk of

sedim

ent t

rans

port

for pi

pe ja

cking

Lo

wRi

sk of

flood

ing fo

r tre

nchin

g Lo

wRi

sk of

flood

ing fo

r pipe

jack

ing

Low

Cons

tructi

on M

ethod

Tr

ench

ing

Miti

gatio

nSt

anda

rd M

anag

emen

t Mea

sure

s Co

nstru

ction

man

agem

ent m

easu

res a

ndOp

erati

on m

anag

emen

t mea

sure

sSp

ecific

Mitig

ation

Mi

nimise

site

distur

banc

e, we

ed m

anag

emen

t,Re

instat

e exc

avate

d pro

file, R

eveg

etatio

n

Cros

sing

Numb

er

422

Wate

rway

Nam

eW

aterw

ay T

ype

Wate

rcour

se st

ream

North

ing

3729

56Ea

sting

57

5894

9Si

te Vi

sit C

omple

ted

Yes

Gen

eral

Rece

iving

Wate

r W

ester

n Por

tCl

assif

icatio

n Va

lley F

illCh

anne

l Plan

For

m un

defin

edCa

tchme

nt Ar

ea (h

a)

11Ty

pical

Slop

e @ P

OINT

13

3Ge

ologic

al De

scrip

tion

Fluvia

l: san

d, sil

t, gra

vel, f

erru

ginou

s san

dIn

stre

am fe

atur

esCh

anne

l Widt

h N/

ATo

p of B

ank W

idth

N/A

Bank

Heig

ht N/

ABa

nk S

hape

N/

ACh

anne

l Stab

ility

stable

Bank

Stab

ility

Stab

leFe

ature

s Ni

lFr

eque

ncy o

f Flow

Int

ermi

ttent

Floo

dpla

in F

eatu

res Flo

odpla

in fea

tures

Ni

lFlo

odpla

in W

idth

unco

nfine

dRi

paria

n Veg

etatio

n Cl

eare

dIns

tream

Veg

etatio

n Ab

sent

Fenc

ed

NoLa

ndus

e ag

ricult

ural

Flor

a an

d Fa

una

Valu

esTe

rrestr

ialAq

uatic

Fau

naAq

uatic

Hab

itat

Com

men

tsCo

mmen

ts No

defin

ed be

d and

ban

ks.

Ris

kRi

sk of

sedim

ent t

rans

port

for tr

ench

ing

Low

Risk

of se

dimen

t tra

nspo

rt for

pipe

jack

ing

Low

Risk

of flo

oding

for t

renc

hing

Low

Risk

of flo

oding

for p

ipe ja

cking

Lo

wCo

nstru

ction

Meth

od

Tren

ching

Miti

gatio

nSt

anda

rd M

anag

emen

t Mea

sure

s Co

nstru

ction

man

agem

ent m

easu

res a

ndOp

erati

on m

anag

emen

t mea

sure

sSp

ecific

Mitig

ation

Mi

nimise

site

distur

banc

e, we

ed m

anag

emen

t,Re

instat

e exc

avate

d pro

file, R

eveg

etatio

n

Cros

sing

Numb

er

410

Wate

rway

Nam

e Ad

am's

Cree

k Sou

th Br

anch

Wate

rway

Typ

eNo

rthing

37

3445

Easti

ng

5761

773

Site

Visit

Com

plete

d No

Gen

eral

Rece

iving

Wate

r W

ester

n Por

tCl

assif

icatio

n Un

confi

ned C

hann

elise

d Wate

rway

Chan

nel P

lan F

orm

chan

nelis

edCa

tchme

nt Ar

ea (h

a)

358

Typic

al Sl

ope @

POI

NT

Flat

Geolo

gical

Desc

riptio

n Flu

vial: s

and,

silt, g

rave

l, fer

rugin

ous s

and

Inst

ream

feat

ures

Chan

nel W

idth

Top o

f Ban

k Widt

h 3m

Bank

Heig

htBa

nk S

hape

Chan

nel S

tabilit

yBa

nk S

tabilit

yFe

ature

sFr

eque

ncy o

f Flow

Floo

dpla

in F

eatu

res Flo

odpla

in fea

tures

Flood

plain

Widt

hRi

paria

n Veg

etatio

n pa

tches

of r

emna

nt ve

getat

ionIns

tream

Veg

etatio

nFe

nced

No

Land

use

Flor

a an

d Fa

una

Valu

esTe

rrestr

ialAq

uatic

Fau

na

Poten

tial h

abita

t for D

warf

Galax

ias.

Aqua

tic H

abita

tC

omm

ents

Comm

ents

Ris

kRi

sk of

sedim

ent t

rans

port

for tr

ench

ing

Low

Risk

of se

dimen

t tra

nspo

rt for

pipe

jack

ing

Low

Risk

of flo

oding

for t

renc

hing

Low

Risk

of flo

oding

for p

ipe ja

cking

Lo

wCo

nstru

ction

Meth

od

Tren

ching

No

site

imag

e av

aila

ble

at th

is tim

e

Miti

gatio

nSt

anda

rd M

anag

emen

t Mea

sure

s Co

nstru

ction

man

agem

ent m

easu

res a

ndOp

erati

on m

anag

emen

t mea

sure

sSp

ecific

Mitig

ation

Mi

nimise

site

distur

banc

e, Cr

ossin

g wate

rway

perp

endic

ular t

o alig

nmen

t, Plac

emen

t of c

lean

rock

for w

orkin

g plat

form,

Stre

amflo

w div

ersio

nme

asur

es, A

void

levee

bank

s, Co

nstru

ction

oftem

pora

ry lev

ee ba

nks,

Wee

d man

agem

ent

Cros

sing

Numb

er

411

Wate

rway

Nam

e Ad

ams C

reek

Wate

rway

Typ

e W

aterco

urse

Cha

nnel

Drain

North

ing

3735

18Ea

sting

57

6203

8Si

te Vi

sit C

omple

ted

NoG

ener

alRe

ceivi

ng W

ater

Wes

tern P

ort

Clas

sifica

tion

Unco

nfine

d Cha

nneli

sed W

aterw

ayCh

anne

l Plan

For

m Ch

aneli

sed

Catch

ment

Area

(ha)

68

Typic

al Sl

ope @

POI

NT

Flat

Geolo

gical

Desc

riptio

n Flu

vial: g

rave

l, san

d, sil

tIn

stre

am fe

atur

esCh

anne

l Widt

hTo

p of B

ank W

idth

Bank

Heig

htBa

nk S

hape

Chan

nel S

tabilit

yBa

nk S

tabilit

yFe

ature

sFr

eque

ncy o

f Flow

Floo

dpla

in F

eatu

res Flo

odpla

in fea

tures

Flood

plain

Widt

hRi

paria

n Veg

etatio

n Cl

eare

dIns

tream

Veg

etatio

n Ni

lFe

nced

No

Land

use

Agric

ultur

alFl

ora

and

Faun

a Va

lues

Terre

strial

Aqua

tic F

auna

Aqua

tic H

abita

tC

omm

ents

Comm

ents

Ris

kRi

sk of

sedim

ent t

rans

port

for tr

ench

ing

Low

Risk

of se

dimen

t tra

nspo

rt for

pipe

jack

ing

Low

Risk

of flo

oding

for t

renc

hing

Low

Risk

of flo

oding

for p

ipe ja

cking

Lo

wCo

nstru

ction

Meth

od

Tren

ching

No

site

imag

e av

aila

ble

at th

is tim

e

Miti

gatio

nSt

anda

rd M

anag

emen

t Mea

sure

s Co

nstru

ction

man

agem

ent m

easu

res a

ndOp

erati

on m

anag

emen

t mea

sure

sSp

ecific

Mitig

ation

Mi

nimise

site

distur

banc

e, Cr

ossin

g wate

rway

perp

endic

ular t

o alig

nmen

t, Plac

emen

t of c

lean

rock

for w

orkin

g plat

form,

Stre

amflo

w div

ersio

nme

asur

es, A

void

levee

bank

s, Co

nstru

ction

oftem

pora

ry lev

ee ba

nks,

Wee

d man

agem

ent

Cros

sing

Numb

er

423

Wate

rway

Nam

e Ad

am's

Cree

k Sou

th Br

anch

Wate

rway

Typ

e W

aterco

urse

Cha

nnel

Drain

North

ing

3732

73Ea

sting

57

6240

2Si

te Vi

sit C

omple

ted

NoG

ener

alRe

ceivi

ng W

ater

Wes

tern P

ort

Clas

sifica

tion

Unco

nfine

d Cha

nneli

sed W

aterw

ayCh

anne

l Plan

For

m Ch

anne

lised

Catch

ment

Area

(ha)

Typic

al Sl

ope @

POI

NT

Flat

Geolo

gical

Desc

riptio

n Flu

vial: s

and,

silt, g

rave

l, fer

rugin

ous s

and

Inst

ream

feat

ures

Chan

nel W

idth

2.5m

Top o

f Ban

k Widt

h 5m

Bank

Heig

ht 1m

Bank

Sha

pe

conv

ex up

ward

sCh

anne

l Stab

ility

stable

Bank

Stab

ility

stable

Featu

res

nilFr

eque

ncy o

f Flow

Int

ermi

ttent

Floo

dpla

in F

eatu

res Flo

odpla

in fea

tures

nil

Flood

plain

Widt

h Un

confi

ned

Ripa

rian V

egeta

tion

Clea

red

Instre

am V

egeta

tion

Abse

ntFe

nced

rig

ht ba

nkLa

ndus

e Ag

ricult

ural

Flor

a an

d Fa

una

Valu

esTe

rrestr

ialAq

uatic

Fau

naAq

uatic

Hab

itat

Com

men

tsCo

mmen

ts Si

te as

sess

ed ba

sed

on ph

otos

take

n by a

nothe

rfie

ld gr

oup

Ris

kRi

sk of

sedim

ent t

rans

port

for tr

ench

ing

Low

Risk

of se

dimen

t tra

nspo

rt for

pipe

jack

ing

Low

Risk

of flo

oding

for t

renc

hing

Low

Risk

of flo

oding

for p

ipe ja

cking

Lo

wCo

nstru

ction

Meth

od

Miti

gatio

nSt

anda

rd M

anag

emen

t Mea

sure

s Co

nstru

ction

man

agem

ent m

easu

res a

ndOp

erati

on m

anag

emen

t mea

sure

sSp

ecific

Mitig

ation

Mi

nimise

site

distur

banc

e, Cr

ossin

g wate

rway

perp

endic

ular t

o alig

nmen

t, Plac

emen

t of c

lean

rock

for w

orkin

g plat

form,

Stre

amflo

w div

ersio

nme

asur

es, A

void

levee

bank

s, Co

nstru

ction

oftem

pora

ry lev

ee ba

nks,

Wee

d man

agem

ent

Cros

sing

Numb

er

424

Wate

rway

Nam

e Ad

am's

Cree

kW

aterw

ay T

ype

Wate

rcour

se C

hann

el Dr

ainNo

rthing

37

2944

Easti

ng

5762

498

Site

Visit

Com

plete

d No

Gen

eral

Rece

iving

Wate

r W

ester

n Por

tCl

assif

icatio

n Un

confi

ned C

hann

elise

d Wate

rway

Chan

nel P

lan F

orm

Chan

nelis

edCa

tchme

nt Ar

ea (h

a)Ty

pical

Slop

e @ P

OINT

Fla

tGe

ologic

al De

scrip

tion

Fluvia

l: san

d, sil

t, gra

vel, f

erru

ginou

s san

dIn

stre

am fe

atur

esCh

anne

l Widt

h 2m

Top o

f Ban

k Widt

h 4m

Bank

Heig

ht 0.7

mBa

nk S

hape

co

nvex

upwa

rds

Chan

nel S

tabilit

y sta

bleBa

nk S

tabilit

y St

able

Featu

res

Freq

uenc

y of F

low

Pere

nnial

Floo

dpla

in F

eatu

res Flo

odpla

in fea

tures

Ni

lFlo

odpla

in W

idth

Unco

nfine

dRi

paria

n Veg

etatio

n Th

ick T

i-tree

scru

b on r

ight b

ank

Instre

am V

egeta

tion

emer

gent

and f

loatin

g mac

roph

ytes

Fenc

ed

Yes -

left b

ank

Land

use

Agric

ultur

alFl

ora

and

Faun

a Va

lues

Terre

strial

Aqua

tic F

auna

Aqua

tic H

abita

t Mo

dera

te ha

bitat

value

s.C

omm

ents

Comm

ents

Thin

strip

of co

ntinu

ous r

iparia

n veg

etati

on lin

esthe

cree

k. S

ite as

sess

ed on

pho

tos ta

ken b

yan

other

field

grou

p. B

ound

by ro

ad.

Ris

kRi

sk of

sedim

ent t

rans

port

for tr

ench

ing

Mediu

mRi

sk of

sedim

ent t

rans

port

for pi

pe ja

cking

Me

dium

Risk

of flo

oding

for t

renc

hing

Mediu

mRi

sk of

flood

ing fo

r pipe

jack

ing

Low

Cons

tructi

on M

ethod

Tr

ench

ing

Miti

gatio

nSt

anda

rd M

anag

emen

t Mea

sure

s Co

nstru

ction

man

agem

ent m

easu

res a

ndOp

erati

on m

anag

emen

t mea

sure

sSp

ecific

Mitig

ation

Mi

nimise

site

distur

banc

e, Cr

ossin

g wate

rway

perp

endic

ular t

o alig

nmen

t, Plac

emen

t of c

lean

rock

for w

orkin

g plat

form,

Stre

amflo

w div

ersio

nme

asur

es, A

void

levee

bank

s, Co

nstru

ction

oftem

pora

ry lev

ee ba

nks,

Wee

d man

agem

ent

Cros

sing

Numb

er

425

Wate

rway

Nam

e Lo

wer L

ang

Lang

Rive

rW

aterw

ay T

ype

North

ing

3734

97Ea

sting

57

6479

3Si

te Vi

sit C

omple

ted

Yes

Gen

eral

Rece

iving

Wate

r W

ester

n Por

tCl

assif

icatio

n Un

conf

ined s

inuou

s cha

nnel

Chan

nel P

lan F

orm

Sinu

ous

Catch

ment

Area

(ha)

Typic

al Sl

ope @

POI

NT

Flat

Geolo

gical

Desc

riptio

n Flu

vial: a

lluviu

m, gr

avel,

sand

, silt

Inst

ream

feat

ures

Chan

nel W

idth

4mTo

p of B

ank W

idth

30m

Bank

Heig

ht 5m

Bank

Sha

pe

conv

ex up

ward

sCh

anne

l Stab

ility

stable

Bank

Stab

ility

stable

Featu

res

gras

sed b

ench

, larg

e woo

d, ru

nFr

eque

ncy o

f Flow

Pe

renn

ialFl

oodp

lain

Fea

ture

s Flood

plain

featur

es

Nil

Flood

plain

Widt

h Un

confi

ned

Ripa

rian V

egeta

tion

Yes

Instre

am V

egeta

tion

terre

strial

gra

ss at

edg

eFe

nced

Ye

sLa

ndus

e Ag

ricult

ural

Flor

a an

d Fa

una

Valu

esTe

rrestr

ial

Unde

rstor

ey pr

edom

inantl

y intr

oduc

ed ve

getat

ionRe

planti

ng of

nati

ve tr

ee an

d shr

ub sp

ecies

hav

eoc

curre

d whic

h pr

ovide

good

habit

at va

lues.

Aqua

tic F

auna

No

thre

atene

d fish

spec

ies fo

und.

Aqua

tic H

abita

tC

omm

ents

Comm

ents

Bank

has p

ocke

ts of

instab

ility a

ssoc

iated

with

trees

, ripa

rian v

eget

ation

on bo

th sid

es (g

rass

es,

wattle

s, tra

desc

antia

), wa

ter cl

arity

indic

ates

trans

portin

g fine

sedim

ent, a

t visi

t wate

r ~1

mde

ep an

d flow

ing, a

nd e

viden

ce o

f rec

ent fl

oodin

g(co

vere

d ben

ches

on b

oth s

ides -

WL u

p ~ 1.

5m)

Ris

kRi

sk of

sedim

ent t

rans

port

for tr

ench

ing

Mediu

mRi

sk of

sedim

ent t

rans

port

for pi

pe ja

cking

Lo

wRi

sk of

flood

ing fo

r tre

nchin

g Me

dium

Risk

of flo

oding

for p

ipe ja

cking

Lo

wCo

nstru

ction

Meth

od

Pipe

jack

Miti

gatio

nSt

anda

rd M

anag

emen

t Mea

sure

s Co

nstru

ction

man

agem

ent m

easu

res a

ndOp

erati

on m

anag

emen

t mea

sure

sSp

ecific

Mitig

ation

Mi

nimise

site

distur

banc

e, Cr

ossin

g wate

rway

perp

endic

ular t

o alig

nmen

t, Plac

emen

t of c

lean

rock

for w

orkin

g plat

form,

Stre

amflo

w div

ersio

nme

asur

es, A

void

levee

bank

s, Co

nstru

ction

oftem

pora

ry lev

ee ba

nks,

Wee

d man

agem

ent

Cros

sing

Numb

er

426

Wate

rway

Nam

e Lo

wer L

ang

Lang

Wate

rway

Typ

e MW

Cha

nnel

North

ing

3733

99Ea

sting

57

6519

7Si

te Vi

sit C

omple

ted

NoG

ener

alRe

ceivi

ng W

ater

Wes

tern P

ort

Clas

sifica

tion

Unco

nfine

d Cha

nneli

sed W

aterw

ayCh

anne

l Plan

For

m Ch

anne

lised

Catch

ment

Area

(ha)

Typic

al Sl

ope @

POI

NT

Flat

Geolo

gical

Desc

riptio

n Flu

vial: a

lluviu

m, gr

avel,

sand

, silt

Inst

ream

feat

ures

Chan

nel W

idth

~1m

Top o

f Ban

k Widt

hBa

nk H

eight

Bank

Sha

peCh

anne

l Stab

ility

Bank

Stab

ility

Featu

res

Freq

uenc

y of F

low

Inter

mitte

ntFl

oodp

lain

Fea

ture

s Flood

plain

featur

esFlo

odpla

in W

idth

Unco

nfine

dRi

paria

n Veg

etatio

n No

Instre

am V

egeta

tion

Fenc

ed

NoLa

ndus

e Ag

ricult

ural

Flor

a an

d Fa

una

Valu

esTe

rrestr

ialAq

uatic

Fau

naAq

uatic

Hab

itat

Com

men

tsCo

mmen

ts Ch

anne

l app

ears

to be

relat

ively

unde

fined

imme

diatel

y ups

tream

Ris

kRi

sk of

sedim

ent t

rans

port

for tr

ench

ing

Low

Risk

of se

dimen

t tra

nspo

rt for

pipe

jack

ing

Low

Risk

of flo

oding

for t

renc

hing

Low

Risk

of flo

oding

for p

ipe ja

cking

Lo

wCo

nstru

ction

Meth

od

Tren

ching

No

site

imag

e av

aila

ble

at th

is tim

e

Miti

gatio

nSt

anda

rd M

anag

emen

t Mea

sure

s Co

nstru

ction

man

agem

ent m

easu

res a

ndOp

erati

on m

anag

emen

t mea

sure

sSp

ecific

Mitig

ation

Mi

nimise

site

distur

banc

e, Cr

ossin

g wate

rway

perp

endic

ular t

o alig

nmen

t, Plac

emen

t of c

lean

rock

for w

orkin

g plat

form,

Stre

amflo

w div

ersio

nme

asur

es, W

eed m

anag

emen

t

Cros

sing

Numb

er

427

Wate

rway

Nam

e Un

name

dW

aterw

ay T

ype

Wat

erco

urse

Cha

nnel

Dra

inNo

rthing

37

2959

Easti

ng

5765

594

Site

Visit

Com

plete

d No

Gen

eral

Rece

iving

Wate

r W

ester

n Por

tCl

assif

icatio

n Fa

rm/ro

ad dr

ain ch

anne

lised

Chan

nel P

lan F

orm

Chan

nelis

edCa

tchme

nt Ar

ea (h

a)Ty

pical

Slop

e @ P

OINT

Fla

tGe

ologic

al De

scrip

tion

Fluvia

l: allu

vium,

grav

el, sa

nd, s

iltIn

stre

am fe

atur

esCh

anne

l Widt

h ~1

mTo

p of B

ank W

idth

Bank

Heig

htBa

nk S

hape

Chan

nel S

tabilit

yBa

nk S

tabilit

yFe

ature

sFr

eque

ncy o

f Flow

Int

ermi

ttent

Floo

dpla

in F

eatu

res Flo

odpla

in fea

tures

Flood

plain

Widt

h Un

confi

ned

Ripa

rian V

egeta

tion

NoIns

tream

Veg

etatio

nFe

nced

No

Land

use

Agric

ultur

alFl

ora

and

Faun

a Va

lues

Terre

strial

Aqua

tic F

auna

Aqua

tic H

abita

tC

omm

ents

Comm

ents

Chan

nel a

ppea

rs to

be re

lative

ly un

defin

edim

media

tely u

pstre

amR

isk

Risk

of se

dimen

t tra

nspo

rt for

tren

ching

Me

dium

Risk

of se

dimen

t tra

nspo

rt for

pipe

jack

ing

Mediu

mRi

sk of

flood

ing fo

r tre

nchin

g Lo

wRi

sk of

flood

ing fo

r pipe

jack

ing

Low

Cons

tructi

on M

ethod

Tr

ench

ing

No

site

imag

e av

aila

ble

at th

is tim

e

Miti

gatio

nSt

anda

rd M

anag

emen

t Mea

sure

s Co

nstru

ction

man

agem

ent m

easu

res a

ndOp

erati

on m

anag

emen

t mea

sure

sSp

ecific

Mitig

ation

Mi

nimise

site

distur

banc

e, Cr

ossin

g wate

rway

perp

endic

ular t

o alig

nmen

t, Plac

emen

t of c

lean

rock

for w

orkin

g plat

form,

Stre

amflo

w div

ersio

nme

asur

es, W

eed m

anag

emen

t

Cros

sing

Numb

er

428

Wate

rway

Nam

eW

aterw

ay T

ype

North

ing

3726

90Ea

sting

57

6584

0Si

te Vi

sit C

omple

ted

NoG

ener

alRe

ceivi

ng W

ater

Wes

tern P

ort

Clas

sifica

tion

Farm

/road

drain

chan

nelis

edCh

anne

l Plan

For

m Ch

anne

lised

Catch

ment

Area

(ha)

Typic

al Sl

ope @

POI

NT

Flat

Geolo

gical

Desc

riptio

n Flu

vial: a

lluviu

m, gr

avel,

sand

, silt

Inst

ream

feat

ures

Chan

nel W

idth

~1m

Top o

f Ban

k Widt

hBa

nk H

eight

Bank

Sha

peCh

anne

l Stab

ility

Bank

Stab

ility

Featu

res

Freq

uenc

y of F

low

Inter

mitte

ntFl

oodp

lain

Fea

ture

s Flood

plain

featur

esFlo

odpla

in W

idth

Unco

nfine

dRi

paria

n Veg

etatio

n No

Instre

am V

egeta

tion

Fenc

ed

NoLa

ndus

e Ag

ricult

ural

Flor

a an

d Fa

una

Valu

esTe

rrestr

ialAq

uatic

Fau

naAq

uatic

Hab

itat

Com

men

tsCo

mmen

ts Ch

anne

l app

ears

to be

relat

ively

unde

fined

imme

diatel

y ups

tream

Ris

kRi

sk of

sedim

ent t

rans

port

for tr

ench

ing

Low

Risk

of se

dimen

t tra

nspo

rt for

pipe

jack

ing

Low

Risk

of flo

oding

for t

renc

hing

Low

Risk

of flo

oding

for p

ipe ja

cking

Lo

wCo

nstru

ction

Meth

od

Tren

ching

No

site

imag

e av

aila

ble

at th

is tim

e

Miti

gatio

nSt

anda

rd M

anag

emen

t Mea

sure

s Co

nstru

ction

man

agem

ent m

easu

res a

ndOp

erati

on m

anag

emen

t mea

sure

sSp

ecific

Mitig

ation

Mi

nimise

site

distur

banc

e, Cr

ossin

g wate

rway

perp

endic

ular t

o alig

nmen

t, Plac

emen

t of c

lean

rock

for w

orkin

g plat

form,

Stre

amflo

w div

ersio

nme

asur

es, W

eed m

anag

emen

t

Cros

sing

Numb

er

529

Wate

rway

Nam

e Mo

nom

eith D

rain

Wate

rway

Typ

eNo

rthing

37

1426

Easti

ng

5767

066

Site

Visit

Com

plete

d Ye

sG

ener

alRe

ceivi

ng W

ater

Wes

tern P

ort

Clas

sifica

tion

Farm

/road

drain

chan

nelis

edCh

anne

l Plan

For

m ch

anne

lised

Catch

ment

Area

(ha)

37

4Ty

pical

Slop

e @ P

OINT

Fla

tGe

ologic

al De

scrip

tion

Fluvia

l: allu

vium,

grav

el, sa

nd, s

iltIn

stre

am fe

atur

esCh

anne

l Widt

h 1.5

mTo

p of B

ank W

idth

3.5m

Bank

Heig

ht 0.4

mBa

nk S

hape

co

nvex

upwa

rds

Chan

nel S

tabilit

y St

able

Bank

Stab

ility

Stab

leFe

ature

s nil

Freq

uenc

y of F

low

Inter

mitte

ntFl

oodp

lain

Fea

ture

s Flood

plain

featur

es

railw

ay al

ignme

nt pe

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r pipe

jack

ing

Low

Cons

tructi

on M

ethod

Pi

pe ja

ck

Miti

gatio

nSt

anda

rd M

anag

emen

t Mea

sure

s Co

nstru

ction

man

agem

ent m

easu

res a

ndOp

erati

on m

anag

emen

t mea

sure

sSp

ecific

Mitig

ation

Mi

nimise

site

distur

banc

e, Di

versi

on D

rains

and

Bund

ing fo

r wate

r man

agem

ent,

Avoid

leve

eba

nks,

Cons

tructi

on of

temp

orar

y lev

ee ba

nks,

Wee

d man

agem

ent. R

einsta

te ins

tream

and

ripar

ian h

abita

t valu

es, r

einsta

te lar

ge w

ood.

Cros

sing

Numb

er

508

Wate

rway

Nam

e Ya

llock

Cre

ekW

aterw

ay T

ype

North

ing

3701

04Ea

sting

57

7044

2Si

te Vi

sit C

omple

ted

NoG

ener

alRe

ceivi

ng W

ater

Wes

tern P

ort

Clas

sifica

tion

Unco

nfine

d Cha

nneli

sed W

aterw

ayCh

anne

l Plan

For

m me

ande

rCa

tchme

nt Ar

ea (h

a)

2795

7Ty

pical

Slop

e @ P

OINT

Co

ntour

s ins

uffici

ent

Geolo

gical

Desc

riptio

n Flu

vial: a

lluviu

m, gr

avel,

sand

, silt

Inst

ream

feat

ures

Chan

nel W

idth

8mTo

p of B

ank W

idth

10m

Bank

Heig

ht 1m

Bank

Sha

pe

conc

ave

Chan

nel S

tabilit

y St

able

Bank

Stab

ility

Stab

leFe

ature

s nil

Freq

uenc

y of F

low

Pere

nnial

Floo

dpla

in F

eatu

res Flo

odpla

in fea

tures

nil

Flood

plain

Widt

h Un

confi

ned

Ripa

rian V

egeta

tion

Ti-tre

e scru

bIns

tream

Veg

etatio

n ma

croph

ytes

Fenc

ed

Fenc

e cro

sses

wat

erwa

y par

allel

with

prop

osed

pipe

align

ment

Land

use

Agric

ultur

alFl

ora

and

Faun

a Va

lues

Terre

strial

Ha

bitat

for G

rowl

ing G

rass

Fro

g, ho

weve

r non

efou

nd.

Aqua

tic F

auna

Dw

arf G

alaxia

s in r

efuge

pools

.Aq

uatic

Hab

itat

Com

men

tsCo

mmen

ts Me

ande

r Cuto

ffs. E

xtens

ive rip

arian

and i

n-ch

anne

l veg

etativ

e cov

er. W

oody

debr

is in

chan

nel.

Dive

rsion

drain

only,

so do

es no

tre

gular

ly ge

t flow

. Flor

a/fau

na te

am fo

und

refug

epo

ols, h

owev

er th

ese m

ay be

able

to be

avoid

eddu

ring c

onstr

uctio

n to m

ake t

renc

hing a

ccep

table

.Si

te as

sess

ed us

ing ph

otog

raph

s tak

en b

yan

other

field

grou

p.R

isk

Risk

of se

dimen

t tra

nspo

rt for

tren

ching

Me

dium

Risk

of se

dimen

t tra

nspo

rt for

pipe

jack

ing

Low

Risk

of flo

oding

for t

renc

hing

Low

Risk

of flo

oding

for p

ipe ja

cking

Lo

wCo

nstru

ction

Meth

od

Pipe

jack

or tr

ench

if ab

le to

avoid

refug

e poo

ls.M

itiga

tion

Stan

dard

Man

agem

ent M

easu

res

Cons

tructi

on m

anag

emen

t mea

sure

s and

Oper

ation

man

agem

ent m

easu

res

Spec

ific M

itigati

on

Minim

ise si

te dis

turba

nce,

Dive

rsion

Dra

ins a

ndBu

nding

for w

ater m

anag

emen

t, Av

oid le

vee

bank

s, Co

nstru

ction

of te

mpor

ary l

evee

bank

s,W

eed m

anag

emen

t, Rein

state

instre

am an

drip

arian

hab

itat v

alues

, rein

state

large

woo

d.Co

nstru

ct du

ring n

o flow

perio

ds. A

void

refug

epo

ols.

Cros

sing

Numb

er

509

Wate

rway

Nam

e Ya

llock

Outf

all D

rain

Wate

rway

Typ

eNo

rthing

37

0078

Easti

ng

5770

491

Site

Visit

Com

plete

d No

Gen

eral

Rece

iving

Wate

r W

ester

n Por

tCl

assif

icatio

n Un

confi

ned C

hann

elise

d Wate

rway

Chan

nel P

lan F

orm

chan

nelis

edCa

tchme

nt Ar

ea (h

a)Ty

pical

Slop

e @ P

OINT

Fla

tGe

ologic

al De

scrip

tion

Fluvia

l: allu

vium,

grav

el, sa

nd, s

iltIn

stre

am fe

atur

esCh

anne

l Widt

hTo

p of B

ank W

idth

5-14

mBa

nk H

eight

Bank

Sha

peCh

anne

l Stab

ility

Bank

Stab

ility

Featu

res

Freq

uenc

y of F

lowFl

oodp

lain

Fea

ture

s Flood

plain

featur

esFlo

odpla

in W

idth

Unco

nfine

dRi

paria

n Veg

etatio

n cle

ared

Instre

am V

egeta

tion

Fenc

ed

NoLa

ndus

e Ag

ricult

ural

Flor

a an

d Fa

una

Valu

esTe

rrestr

ial

Poten

tial H

abita

t for D

warf

Galax

ias, G

rowl

ingGr

ass F

rog,

macro

phyte

s and

High

habit

atva

lues.

Aqua

tic F

auna

Aqua

tic H

abita

tC

omm

ents

Comm

ents

Ris

kRi

sk of

sedim

ent t

rans

port

for tr

ench

ing

Mediu

mRi

sk of

sedim

ent t

rans

port

for pi

pe ja

cking

Lo

wRi

sk of

flood

ing fo

r tre

nchin

g Lo

wRi

sk of

flood

ing fo

r pipe

jack

ing

Low

Cons

tructi

on M

ethod

Tr

ench

ing

No

site

imag

e av

aila

ble

at th

is tim

e

Miti

gatio

nSt

anda

rd M

anag

emen

t Mea

sure

s Co

nstru

ction

man

agem

ent m

easu

res a

ndOp

erati

on m

anag

emen

t mea

sure

sSp

ecific

Mitig

ation

Mi

nimise

site

distur

banc

e, Di

versi

on D

rains

and

Bund

ing fo

r wate

r man

agem

ent,

Avoid

leve

eba

nks,

Cons

tructi

on of

temp

orar

y lev

ee ba

nks,

Wee

d man

agem

ent, R

einsta

te ins

tream

and

ripar

ian h

abita

t valu

es, r

einsta

te lar

ge w

ood.

Cros

sing

Numb

er

510

Wate

rway

Nam

e So

uther

n Bou

ndar

y Drai

nW

aterw

ay T

ype

North

ing

3691

25Ea

sting

57

7241

5Si

te Vi

sit C

omple

ted

Yes

Gen

eral

Rece

iving

Wate

r W

ester

n Por

tCl

assif

icatio

n Un

confi

ned C

hann

elise

d Wate

rway

Chan

nel P

lan F

orm

chan

nelis

edCa

tchme

nt Ar

ea (h

a)

659

Typic

al Sl

ope @

POI

NT

Flat

Geolo

gical

Desc

riptio

n Flu

vial: a

lluviu

m, gr

avel,

sand

, silt

Inst

ream

feat

ures

Chan

nel W

idth

2mTo

p of B

ank W

idth

10m

Bank

Heig

ht 4m

Bank

Sha

pe

uprig

htCh

anne

l Stab

ility

stable

Bank

Stab

ility

stable

Featu

res

nilFr

eque

ncy o

f Flow

ep

heme

ral

Floo

dpla

in F

eatu

res Flo

odpla

in fea

tures

lev

eeFlo

odpla

in W

idth

unco

nfine

dRi

paria

n Veg

etatio

n Ye

sIns

tream

Veg

etatio

n ma

croph

ytes

Fenc

ed

NoLa

ndus

e Ag

ricult

ural

Flor

a an

d Fa

una

Valu

esTe

rrestr

ialAq

uatic

Fau

naAq

uatic

Hab

itat

Com

men

tsCo

mmen

ts St

andin

g wat

er ve

getat

ion -

true l

eft lin

ing ba

nk,

and t

rue r

ight li

ning l

evee

, ben

ch cl

eare

dR

isk

Risk

of se

dimen

t tra

nspo

rt for

tren

ching

Me

dium

Risk

of se

dimen

t tra

nspo

rt for

pipe

jack

ing

Low

Risk

of flo

oding

for t

renc

hing

Low

Risk

of flo

oding

for p

ipe ja

cking

Lo

wCo

nstru

ction

Meth

od

Pipe

jack

Miti

gatio

nSt

anda

rd M

anag

emen

t Mea

sure

s Co

nstru

ction

man

agem

ent m

easu

res a

ndOp

erati

on m

anag

emen

t mea

sure

sSp

ecific

Mitig

ation

Mi

nimise

site

distur

banc

e, Cr

ossin

g wate

rway

perp

endic

ular t

o alig

nmen

t, Plac

emen

t of c

lean

rock

for w

orkin

g plat

form,

Stre

amflo

w div

ersio

nme

asur

es, A

void

levee

bank

s, Co

nstru

ction

oftem

pora

ry lev

ee ba

nks,

Wee

d man

agem

ent,

Prior

itise c

onstr

uctio

n dur

ing no

flow

perio

ds an

dco

-ord

inate

cons

tructi

on an

d re

instat

emen

t to

minim

ise du

ratio

n of e

xpos

ure.

Cros

sing

Numb

er

511

Wate

rway

Nam

eW

aterw

ay T

ype

Wate

rcour

se S

tream

North

ing

3689

66Ea

sting

57

7269

8Si

te Vi

sit C

omple

ted

Yes

Gen

eral

Rece

iving

Wate

r W

ester

n Por

tCl

assif

icatio

n Va

lley F

illCh

anne

l Plan

For

m sli

ghtly

sinu

ous

Catch

ment

Area

(ha)

Typic

al Sl

ope @

POI

NTGe

ologic

al De

scrip

tion

Fluvia

l: allu

vium,

grav

el, sa

nd, s

iltIn

stre

am fe

atur

esCh

anne

l Widt

h N/

ATo

p of B

ank W

idth

N/A

Bank

Heig

ht N/

ABa

nk S

hape

N/

ACh

anne

l Stab

ility

Stab

leBa

nk S

tabilit

y St

able

Featu

res

nilFr

eque

ncy o

f Flow

int

ermi

ttent

Floo

dpla

in F

eatu

res Flo

odpla

in fea

tures

nil

Flood

plain

Widt

h un

confi

ned

Ripa

rian V

egeta

tion

Clea

red

Instre

am V

egeta

tion

Abse

ntFe

nced

No

Land

use

Agric

ultur

alFl

ora

and

Faun

a Va

lues

Terre

strial

Aqua

tic F

auna

Aqua

tic H

abita

tC

omm

ents

Comm

ents

Indist

inct p

aleoc

hann

el ev

ident

down

strea

m of

cross

ing. U

ndefi

ned a

t cro

ssing

.R

isk

Risk

of se

dimen

t tra

nspo

rt for

tren

ching

Lo

wRi

sk of

sedim

ent t

rans

port

for pi

pe ja

cking

Lo

wRi

sk of

flood

ing fo

r tre

nchin

g Lo

wRi

sk of

flood

ing fo

r pipe

jack

ing

Low

Cons

tructi

on M

ethod

Tr

ench

ing

Miti

gatio

nSt

anda

rd M

anag

emen

t Mea

sure

s Co

nstru

ction

man

agem

ent m

easu

res a

ndOp

erati

on m

anag

emen

t mea

sure

sSp

ecific

Mitig

ation

Mi

nimise

site

distur

banc

e, we

ed m

anag

emen

t,Re

instat

e exc

avate

d pro

file, R

eveg

etatio

n

Cros

sing

Numb

er

512

Wate

rway

Nam

e Gr

ay's

Drain

Wate

rway

Typ

e MW

Cha

nnel

North

ing

3689

01Ea

sting

57

7281

2Si

te Vi

sit C

omple

ted

Yes

Gen

eral

Rece

iving

Wate

r W

ester

n Por

tCl

assif

icatio

n Fa

rm/ro

ad dr

ain ch

anne

lised

Chan

nel P

lan F

orm

chan

nelis

edCa

tchme

nt Ar

ea (h

a)Ty

pical

Slop

e @ P

OINT

15

0Ge

ologic

al De

scrip

tion

Fluvia

l: allu

vium,

grav

el, sa

nd, s

iltIn

stre

am fe

atur

esCh

anne

l Widt

h 1.5

mTo

p of B

ank W

idth

2.5m

Bank

Heig

ht 0.5

mBa

nk S

hape

V-

shap

eCh

anne

l Stab

ility

Stab

leBa

nk S

tabilit

y St

able

Featu

res

Nil

Freq

uenc

y of F

low

Inter

mitte

ntFl

oodp

lain

Fea

ture

s Flood

plain

featur

es

Nil

Flood

plain

Widt

h Un

confi

ned

Ripa

rian V

egeta

tion

cypr

us pi

nes a

long l

eft ba

nkIns

tream

Veg

etatio

n Ab

sent

Fenc

ed

Doub

le fen

ce on

sout

hern

side

Land

use

agric

ultur

alFl

ora

and

Faun

a Va

lues

Terre

strial

Aqua

tic F

auna

Aqua

tic H

abita

tC

omm

ents

Comm

ents

Cypr

us pi

nes p

lanted

by la

ndow

ner.

Pre

fer if

align

ment

could

pass

thro

ugh d

ead p

atch

(curre

ntly a

ppea

rs to

do so

)R

isk

Risk

of se

dimen

t tra

nspo

rt for

tren

ching

Me

dium

Risk

of se

dimen

t tra

nspo

rt for

pipe

jack

ing

Mediu

mRi

sk of

flood

ing fo

r tre

nchin

g Me

dium

Risk

of flo

oding

for p

ipe ja

cking

Lo

wCo

nstru

ction

Meth

od

Tren

ching

Miti

gatio

nSt

anda

rd M

anag

emen

t Mea

sure

s Co

nstru

ction

man

agem

ent m

easu

res a

ndOp

erati

on m

anag

emen

t mea

sure

sSp

ecific

Mitig

ation

Mi

nimise

site

distur

banc

e, we

ed m

anag

emen

t,Re

instat

e exc

avate

d pro

file, R

eveg

etatio

n,Pl

acem

ent o

f clea

n roc

k for

worki

ng pl

atfor

m,St

ream

flow

diver

sion m

easu

res,

Prior

itise

cons

tructi

on du

ring n

o flow

perio

ds an

d co-

ordin

ate co

nstru

ction

and

reins

tatem

ent to

minim

ise du

ratio

n of e

xpos

ure.

Cros

sing

Numb

er

535

Wate

rway

Nam

e So

uth E

ast C

atch

ment

Drain

Wate

rway

Typ

eNo

rthing

36

8461

Easti

ng

5773

059

Site

Visit

Com

plete

d Ye

sG

ener

alRe

ceivi

ng W

ater

Wes

tern P

ort

Clas

sifica

tion

Unco

nfine

d Cha

nneli

sed W

aterw

ayCh

anne

l Plan

For

m ch

anne

lised

Catch

ment

Area

(ha)

Typic

al Sl

ope @

POI

NT

Flat

Geolo

gical

Desc

riptio

n Flu

vial: a

lluviu

m, gr

avel,

sand

, silt

Inst

ream

feat

ures

Chan

nel W

idth

1.5m

Top o

f Ban

k Widt

h 5m

Bank

Heig

ht 1.5

mBa

nk S

hape

up

right

Chan

nel S

tabilit

y sta

bleBa

nk S

tabilit

y sta

bleFe

ature

s Ni

lFr

eque

ncy o

f Flow

int

ermi

ttent

Floo

dpla

in F

eatu

res Flo

odpla

in fea

tures

lev

ees

Flood

plain

Widt

h un

confi

ned

Ripa

rian V

egeta

tion

Clea

red

Instre

am V

egeta

tion

macro

phyte

sFe

nced

No

Land

use

agric

ultur

alFl

ora

and

Faun

a Va

lues

Terre

strial

Re

colon

ised s

wam

p pap

erba

rk ov

er in

trodu

ced

unde

rstor

ey. N

o Gro

wling

Gra

ss F

rog r

ecor

ded.

Aqua

tic F

auna

Aq

uatic

mac

roph

ytes p

rovid

e pot

entia

l hab

itat fo

rDw

arf G

alaxia

s.Aq

uatic

Hab

itat

Com

men

tsCo

mmen

ts Mi

nimal

ripar

ian ve

getat

ion -

small

shru

bs tr

ue le

ftba

nk.

Fine s

edim

ent. L

evee

s. Cl

ose t

o RAM

SAR.

Curre

nt ali

gnme

t will

make

pipe

jack

ing di

ficult

.Su

gges

t mov

e alig

nmen

t to en

able

pipe j

ackin

gwi

th 51

4 and

515

Ris

kRi

sk of

sedim

ent t

rans

port

for tr

ench

ing

Mediu

mRi

sk of

sedim

ent t

rans

port

for pi

pe ja

cking

Lo

wRi

sk of

flood

ing fo

r tre

nchin

g Lo

wRi

sk of

flood

ing fo

r pipe

jack

ing

Low

Cons

tructi

on M

ethod

Pi

pe ja

ck C

onstr

uct a

s one

cros

sing l

ocati

on fo

rpip

e jac

king

(comb

ine w

ith 51

4 an

d 515

). T

hiswi

ll req

uire t

he al

ignme

nt to

be m

oved

.M

itiga

tion

Stan

dard

Man

agem

ent M

easu

res

Cons

tructi

on m

anag

emen

t mea

sure

s and

Oper

ation

man

agem

ent m

easu

res

Spec

ific M

itigati

on

Minim

ise si

te dis

turba

nce,

Reins

tate e

xcav

ated

profi

le, A

void

levee

bank

s, Co

nstru

ction

oftem

pora

ry lev

ee ba

nks,

Wee

d man

agem

ent,

Dive

rsion

Drai

ns a

nd bu

nding

for w

ater

mana

gem

ent.

Cros

sing

Numb

er

514

Wate

rway

Nam

e Bu

nyip

Rive

r Main

Dra

inW

aterw

ay T

ype

North

ing

3686

47Ea

sting

57

7333

0Si

te Vi

sit C

omple

ted

Yes

Gen

eral

Rece

iving

Wate

r W

ester

n Por

tCl

assif

icatio

n Un

confi

ned C

hann

elise

d Wate

rway

Chan

nel P

lan F

orm

chan

nelis

edCa

tchme

nt Ar

ea (h

a)Ty

pical

Slop

e @ P

OINT

Fla

tGe

ologic

al De

scrip

tion

Fluvia

l: allu

vium,

grav

el, sa

nd, s

iltIn

stre

am fe

atur

esCh

anne

l Widt

h 10

mTo

p of B

ank W

idth

15m

Bank

Heig

ht 3m

Bank

Sha

pe

conv

ex up

ward

sCh

anne

l Stab

ility

stable

Bank

Stab

ility

stable

Featu

res

Run

Freq

uenc

y of F

low

pere

nnial

Floo

dpla

in F

eatu

res Flo

odpla

in fea

tures

lev

ees

Flood

plain

Widt

h un

confi

ned

Ripa

rian V

egeta

tion

Clea

red

Instre

am V

egeta

tion

macro

phyte

sFe

nced

No

Land

use

agric

ultur

alFl

ora

and

Faun

a Va

lues

Terre

strial

Aqua

tic F

auna

Au

strali

an G

rayli

ng, D

warf

Galax

iasAq

uatic

Hab

itat

Com

men

tsCo

mmen

ts Bu

nyip

Main

Drain

. No e

rosio

n, aq

uatic

vege

tation

. Mos

tly lin

es cr

eek.

Loc

alise

dag

grad

ation

in cr

eek b

ed. L

evee

s - 10

m co

nvex

upwa

rds.

Pools

dur

ing Lo

w flo

w.

Ris

kRi

sk of

sedim

ent t

rans

port

for tr

ench

ing

Mediu

mRi

sk of

sedim

ent t

rans

port

for pi

pe ja

cking

Lo

wRi

sk of

flood

ing fo

r tre

nchin

g Me

dium

Risk

of flo

oding

for p

ipe ja

cking

Lo

wCo

nstru

ction

Meth

od

Pipe

jack

Con

struc

t as o

ne cr

ossin

g loc

ation

for

pipe

jackin

g (co

mbine

with

535

and 5

15)

Miti

gatio

nSt

anda

rd M

anag

emen

t Mea

sure

s Co

nstru

ction

man

agem

ent m

easu

res a

ndOp

erati

on m

anag

emen

t mea

sure

sSp

ecific

Mitig

ation

Mi

nimise

site

distur

banc

e, Re

instat

e exc

avat

edpr

ofile,

Avo

id lev

ee ba

nks,

Cons

tructi

on of

tempo

rary

levee

bank

s, W

eed m

anag

emen

t,Di

versi

on D

rains

and

bund

ing fo

r wate

rma

nage

men

t.

Cros

sing

Numb

er

515

Wate

rway

Nam

e No

rth W

est C

atch

ment

Drain

Wate

rway

Typ

eNo

rthing

36

8614

Easti

ng

5773

362

Site

Visit

Com

plete

d Ye

sG

ener

alRe

ceivi

ng W

ater

Wes

tern P

ort

Clas

sifica

tion

Unco

nfine

d Cha

nneli

sed W

aterw

ayCh

anne

l Plan

For

m ch

anne

lised

Catch

ment

Area

(ha)

Typic

al Sl

ope @

POI

NT

Flat

Geolo

gical

Desc

riptio

n Flu

vial: a

lluviu

m, gr

avel,

sand

, silt

Inst

ream

feat

ures

Chan

nel W

idth

5mTo

p of B

ank W

idth

10m

Bank

Heig

ht 3m

Bank

Sha

pe

conv

ex up

ward

Chan

nel S

tabilit

y sta

bleBa

nk S

tabilit

y sta

bleFe

ature

s Ru

nFr

eque

ncy o

f Flow

Int

ermi

ttent

Floo

dpla

in F

eatu

res Flo

odpla

in fea

tures

lev

ees

Flood

plain

Widt

h un

confi

ned

Ripa

rian V

egeta

tion

Patch

es of

remn

ant v

egeta

tion

Instre

am V

egeta

tion

macro

phyte

sFe

nced

No

Land

use

agric

ultur

alFl

ora

and

Faun

a Va

lues

Terre

strial

Aqua

tic F

auna

Aqua

tic H

abita

tC

omm

ents

Comm

ents

Subm

erge

nt ma

croph

ytes w

ith so

me b

iofilm

,so

me irr

egula

rity in

bank

with

larg

e woo

dde

posit

ion. S

ome b

are p

atche

s on b

ank,

but

mostl

y gra

ssed

. Lev

ees o

n tru

e left

only.

Ris

kRi

sk of

sedim

ent t

rans

port

for tr

ench

ing

Mediu

mRi

sk of

sedim

ent t

rans

port

for pi

pe ja

cking

Lo

wRi

sk of

flood

ing fo

r tre

nchin

g Lo

wRi

sk of

flood

ing fo

r pipe

jack

ing

Low

Cons

tructi

on M

ethod

Pi

pe ja

ck C

onstr

uct a

s one

cros

sing l

ocati

on fo

rpip

e jac

king

(comb

ine w

ith 51

4 an

d 535

Miti

gatio

nSt

anda

rd M

anag

emen

t Mea

sure

s Co

nstru

ction

man

agem

ent m

easu

res a

ndOp

erati

on m

anag

emen

t mea

sure

sSp

ecific

Mitig

ation

Mi

nimise

site

distur

banc

e, Re

instat

e exc

avat

edpr

ofile,

Avo

id lev

ee ba

nks,

Cons

tructi

on of

tempo

rary

levee

bank

s, W

eed m

anag

emen

t,Di

versi

on D

rains

and

bund

ing fo

r wate

rma

nage

men

t.

Cros

sing

Numb

er

516

Wate

rway

Nam

e Hi

mbec

k's D

rain

Wate

rway

Typ

e MW

Cha

nnel

North

ing

3686

94Ea

sting

57

7418

6Si

te Vi

sit C

omple

ted

Yes

Gen

eral

Rece

iving

Wate

r W

ester

n Por

tCl

assif

icatio

n Fa

rm/ro

ad dr

ain ch

anne

lised

Chan

nel P

lan F

orm

chan

nelis

edCa

tchme

nt Ar

ea (h

a)Ty

pical

Slop

e @ P

OINT

Fla

tGe

ologic

al De

scrip

tion

Fluvia

l: allu

vium,

grav

el, sa

nd, s

iltIn

stre

am fe

atur

esCh

anne

l Widt

h 1.5

mTo

p of B

ank W

idth

3mBa

nk H

eight

1.2m

Bank

Sha

pe

conv

ex up

ward

Chan

nel S

tabilit

y St

able

Bank

Stab

ility

Stab

leFe

ature

s v.m

inor lo

calis

ed sl

umpin

gFr

eque

ncy o

f Flow

Int

ermi

ttent

Floo

dpla

in F

eatu

res Flo

odpla

in fea

tures

ex

cava

tion l

evee

on le

ft ban

kFlo

odpla

in W

idth

Unco

nfine

dRi

paria

n Veg

etatio

n pa

tch o

f larg

e con

ifers

at cro

ssing

Instre

am V

egeta

tion

Abse

ntFe

nced

On

left b

ank

Land

use

agric

ultur

alFl

ora

and

Faun

a Va

lues

Terre

strial

Aqua

tic F

auna

Aqua

tic H

abita

tC

omm

ents

Comm

ents

Ris

kRi

sk of

sedim

ent t

rans

port

for tr

ench

ing

Mediu

mRi

sk of

sedim

ent t

rans

port

for pi

pe ja

cking

Me

dium

Risk

of flo

oding

for t

renc

hing

Mediu

mRi

sk of

flood

ing fo

r pipe

jack

ing

Low

Cons

tructi

on M

ethod

Tr

ench

ing

Miti

gatio

nSt

anda

rd M

anag

emen

t Mea

sure

s Co

nstru

ction

man

agem

ent m

easu

res a

ndOp

erati

on m

anag

emen

t mea

sure

sSp

ecific

Mitig

ation

Mi

nimise

site

distur

banc

e, we

ed m

anag

emen

t,Re

instat

e exc

avate

d pro

file, R

eveg

etatio

n,Pl

acem

ent o

f clea

n roc

k for

worki

ng pl

atfor

m,St

ream

flow

diver

sion m

easu

res,

Prior

itise

cons

tructi

on du

ring n

o flow

perio

ds an

d co-

ordin

ate co

nstru

ction

and

reins

tatem

ent to

minim

ise du

ratio

n of e

xpos

ure.

Cros

sing

Numb

er

536

Wate

rway

Nam

e Mc

Dona

ld's C

atch D

rain

Wate

rway

Typ

eNo

rthing

36

8912

Easti

ng

5775

834

Site

Visit

Com

plete

d Ye

sG

ener

alRe

ceivi

ng W

ater

Wes

tern P

ort

Clas

sifica

tion

Farm

/road

drain

chan

nelis

edCh

anne

l Plan

For

m ch

anne

lised

Catch

ment

Area

(ha)

Typic

al Sl

ope @

POI

NT

Flat

Geolo

gical

Desc

riptio

n Flu

vial: a

lluviu

m, gr

avel,

sand

, silt

Inst

ream

feat

ures

Chan

nel W

idth

1.5m

Top o

f Ban

k Widt

h 7m

Bank

Heig

ht 3m

Bank

Sha

pe

uprig

htCh

anne

l Stab

ility

stable

Bank

Stab

ility

stable

Featu

res

nilFr

eque

ncy o

f Flow

Int

ermi

ttent

Floo

dpla

in F

eatu

res Flo

odpla

in fea

tures

lev

eeFlo

odpla

in W

idth

unco

nfine

dRi

paria

n Veg

etatio

n pa

tches

of r

emna

nt ve

getat

ionIns

tream

Veg

etatio

n Ab

sent

Fenc

ed

NoLa

ndus

e ag

ricult

ural

Flor

a an

d Fa

una

Valu

esTe

rrestr

ial

Grow

ling G

rass

Fro

g rec

orde

d. P

otenti

al ha

bitat

for S

outhe

rn B

rown

Ban

dicoo

tAq

uatic

Fau

naAq

uatic

Hab

itat

Aqua

tic ve

getat

ion, d

ry at

time o

f visi

t. No

refug

epo

ols.

Com

men

tsCo

mmen

ts Cl

ose t

o RAM

SAR,

wate

rway

with

sign

ifican

tse

dimen

t tran

spor

t cap

acity

. Lev

ee on

righ

t ban

k.

Ris

kRi

sk of

sedim

ent t

rans

port

for tr

ench

ing

Mediu

mRi

sk of

sedim

ent t

rans

port

for pi

pe ja

cking

Me

dium

Risk

of flo

oding

for t

renc

hing

Mediu

mRi

sk of

flood

ing fo

r pipe

jack

ing

Low

Cons

tructi

on M

ethod

Pi

pe ja

ck C

onstr

uct a

s one

cros

sing l

ocati

on fo

rpip

e jac

king

(comb

ine w

ith 53

7 an

d 538

)M

itiga

tion

Stan

dard

Man

agem

ent M

easu

res

Cons

tructi

on m

anag

emen

t mea

sure

s and

Oper

ation

man

agem

ent m

easu

res

Spec

ific M

itigati

on

Minim

ise si

te dis

turba

nce,

Reins

tate e

xcav

ated

profi

le, A

void

levee

bank

s, Co

nstru

ction

oftem

pora

ry lev

ee ba

nks,

Wee

d man

agem

ent,

Dive

rsion

Drai

ns a

nd bu

nding

for w

ater

mana

gem

ent.

Cros

sing

Numb

er

537

Wate

rway

Nam

e Mc

Dona

ld's C

atch D

rain

Wate

rway

Typ

eNo

rthing

36

8883

Easti

ng

5775

839

Site

Visit

Com

plete

d Ye

sG

ener

alRe

ceivi

ng W

ater

Wes

tern P

ort

Clas

sifica

tion

Farm

/road

drain

chan

nelis

edCh

anne

l Plan

For

m ch

anne

lised

Catch

ment

Area

(ha)

89

543

Typic

al Sl

ope @

POI

NT

Flat

Geolo

gical

Desc

riptio

n Flu

vial: a

lluviu

m, gr

avel,

sand

, silt

Inst

ream

feat

ures

Chan

nel W

idth

7mTo

p of B

ank W

idth

15m

Bank

Heig

ht 2m

Bank

Sha

pe

conv

ex up

ward

sCh

anne

l Stab

ility

stable

Bank

Stab

ility

stable

Featu

res

nilFr

eque

ncy o

f Flow

pe

renn

ialFl

oodp

lain

Fea

ture

s Flood

plain

featur

es

levee

Flood

plain

Widt

h un

confi

ned

Ripa

rian V

egeta

tion

patch

es o

f rem

nant

vege

tation

Instre

am V

egeta

tion

Wate

r ribb

on, m

acro

phyte

s, fila

ment

ous a

lgae

Fenc

ed

NoLa

ndus

e ag

ricult

ural

Flor

a an

d Fa

una

Valu

esTe

rrestr

ialAq

uatic

Fau

naAq

uatic

Hab

itat

Com

men

tsCo

mmen

ts Cl

ose t

o RAM

SAR,

wate

rway

with

sign

ifican

tse

dimen

t tran

spor

t cap

acity

. Lev

ees b

oth s

ides.

Ris

kRi

sk of

sedim

ent t

rans

port

for tr

ench

ing

Mediu

mRi

sk of

sedim

ent t

rans

port

for pi

pe ja

cking

Me

dium

Risk

of flo

oding

for t

renc

hing

Mediu

mRi

sk of

flood

ing fo

r pipe

jack

ing

Low

Cons

tructi

on M

ethod

Pi

pe ja

ck C

onstr

uct a

s one

cros

sing l

ocati

on fo

rpip

e jac

king

(536

and 5

38)

Miti

gatio

nSt

anda

rd M

anag

emen

t Mea

sure

s Co

nstru

ction

man

agem

ent m

easu

res a

ndOp

erati

on m

anag

emen

t mea

sure

sSp

ecific

Mitig

ation

Mi

nimise

site

distur

banc

e, Re

instat

e exc

avat

edpr

ofile,

Avo

id lev

ee ba

nks,

Cons

tructi

on of

tempo

rary

levee

bank

s, W

eed m

anag

emen

t,Di

versi

on D

rains

and

bund

ing fo

r wate

rma

nage

men

t.

Cros

sing

Numb

er

538

Wate

rway

Nam

e Mc

Dona

ld's D

rain

3043

Wate

rway

Typ

eNo

rthing

36

8854

Easti

ng

5775

843

Site

Visit

Com

plete

d Ye

sG

ener

alRe

ceivi

ng W

ater

Wes

tern P

ort

Clas

sifica

tion

Farm

/road

drain

Chan

nel P

lan F

orm

chan

nelis

edCa

tchme

nt Ar

ea (h

a)Ty

pical

Slop

e @ P

OINT

Fla

tGe

ologic

al De

scrip

tion

Fluvia

l: allu

vium,

grav

el, sa

nd, s

iltIn

stre

am fe

atur

esCh

anne

l Widt

h 0.2

5mTo

p of B

ank W

idth

0.5m

Bank

Heig

ht 0.2

5mBa

nk S

hape

co

nvex

upwa

rds

Chan

nel S

tabilit

y sta

bleBa

nk S

tabilit

y sta

bleFe

ature

s nil

Freq

uenc

y of F

low

inter

mitte

ntFl

oodp

lain

Fea

ture

s Flood

plain

featur

es

nilFlo

odpla

in W

idth

unco

nfine

dRi

paria

n Veg

etatio

n pa

tches

of r

emna

nt ve

getat

ionIns

tream

Veg

etatio

n Ab

sent

Fenc

ed

NoLa

ndus

e ag

ricult

ural

Flor

a an

d Fa

una

Valu

esTe

rrestr

ialAq

uatic

Fau

naAq

uatic

Hab

itat

Com

men

tsCo

mmen

ts Cl

ose t

o RAM

SAR,

wate

rway

with

sign

ifican

tse

dimen

t tran

spor

t cap

acity

. Lon

g gra

ss an

dbla

ckbe

rry. C

hann

el do

es no

t app

ear t

o ex

ist as

per M

elbou

rne W

ater

layer

- sm

all ch

anne

l on

McDo

nald'

s Dra

in sid

e, wh

ich ap

pear

s to b

efor

med b

y roa

d run

off.

Ris

kRi

sk of

sedim

ent t

rans

port

for tr

ench

ing

Mediu

mRi

sk of

sedim

ent t

rans

port

for pi

pe ja

cking

Me

dium

Risk

of flo

oding

for t

renc

hing

Mediu

mRi

sk of

flood

ing fo

r pipe

jack

ing

Low

Cons

tructi

on M

ethod

Pi

pe ja

ck C

onstr

uct a

s one

cros

sing l

ocati

on fo

rpip

e jac

king

(comb

ine w

ith 53

6 an

d 537

)M

itiga

tion

Stan

dard

Man

agem

ent M

easu

res

Cons

tructi

on m

anag

emen

t mea

sure

s and

Oper

ation

man

agem

ent m

easu

res

Spec

ific M

itigati

on

Minim

ise si

te dis

turba

nce,

Reins

tate e

xcav

ated

profi

le, A

void

levee

bank

s, Co

nstru

ction

oftem

pora

ry lev

ee ba

nks,

Wee

d man

agem

ent,

Dive

rsion

Drai

ns a

nd bu

nding

for w

ater

mana

gem

ent.

Cros

sing

Numb

er

539

Wate

rway

Nam

e Mc

Greg

or's

Drain

Wate

rway

Typ

eNo

rthing

36

7324

Easti

ng

5776

261

Site

Visit

Com

plete

d Ye

sG

ener

alRe

ceivi

ng W

ater

Wes

tern P

ort

Clas

sifica

tion

Farm

/road

drain

chan

nelis

edCh

anne

l Plan

For

m ch

anne

lised

Catch

ment

Area

(ha)

63

0Ty

pical

Slop

e @ P

OINT

Fla

tGe

ologic

al De

scrip

tion

Palud

al: la

goon

and s

wamp

depo

sits:

silt, c

layIn

stre

am fe

atur

esCh

anne

l Widt

h 1.5

mTo

p of B

ank W

idth

4mBa

nk H

eight

1.5m

Bank

Sha

pe

vertic

alCh

anne

l Stab

ility

stable

Bank

Stab

ility

stable

Featu

res

nilFr

eque

ncy o

f Flow

int

ermi

ttent

Floo

dpla

in F

eatu

res Flo

odpla

in fea

tures

nil

Flood

plain

Widt

h un

confi

ned

Ripa

rian V

egeta

tion

Scatt

ered

exoti

csIns

tream

Veg

etatio

n W

ater r

ibbon

Fenc

ed

Yes

Land

use

agric

ultur

alFl

ora

and

Faun

a Va

lues

Terre

strial

Aqua

tic F

auna

Aqua

tic H

abita

tC

omm

ents

Comm

ents

0.10m

wate

r. Tr

ue le

ft ban

k Low

er, b

ut ro

adra

ised a

bove

.R

isk

Risk

of se

dimen

t tra

nspo

rt for

tren

ching

Me

dium

Risk

of se

dimen

t tra

nspo

rt for

pipe

jack

ing

Mediu

mRi

sk of

flood

ing fo

r tre

nchin

g Me

dium

Risk

of flo

oding

for p

ipe ja

cking

Lo

wCo

nstru

ction

Meth

od

Tren

ching

Miti

gatio

nSt

anda

rd M

anag

emen

t Mea

sure

s Co

nstru

ction

man

agem

ent m

easu

res a

ndOp

erati

on m

anag

emen

t mea

sure

sSp

ecific

Mitig

ation

Mi

nimise

site

distur

banc

e, we

ed m

anag

emen

t,Re

instat

e exc

avate

d pro

file, R

eveg

etatio

n,Pr

ioritis

e con

struc

tion d

uring

no flo

w pe

riods

and

co-o

rdina

te co

nstru

ction

and

reins

tatem

ent t

omi

nimise

dura

tion o

f exp

osur

e.

Cros

sing

Numb

er

540

Wate

rway

Nam

e Ha

gelth

orne

's Dr

ainW

aterw

ay T

ype

North

ing

3652

87Ea

sting

57

7655

1Si

te Vi

sit C

omple

ted

Yes

Gen

eral

Rece

iving

Wate

r W

ester

n Por

tCl

assif

icatio

n Fa

rm/ro

ad dr

ain ch

anne

lised

Chan

nel P

lan F

orm

chan

nelis

edCa

tchme

nt Ar

ea (h

a)

7304

Typic

al Sl

ope @

POI

NT

2500

Geolo

gical

Desc

riptio

n Pa

ludal:

lago

on an

d swa

mp de

posit

s: sil

t, clay

Inst

ream

feat

ures

Chan

nel W

idth

2mTo

p of B

ank W

idth

8mBa

nk H

eight

2.5m

Bank

Sha

pe

conc

ave u

pwar

dsCh

anne

l Stab

ility

Stab

leBa

nk S

tabilit

y sta

bleFe

ature

s Sm

all ar

eas o

f slum

ping

Freq

uenc

y of F

low

inter

mitte

ntFl

oodp

lain

Fea

ture

s Flood

plain

featur

es

Leve

e on

weste

rn si

deFlo

odpla

in W

idth

Unco

nfine

dRi

paria

n Veg

etatio

n Sc

atter

ed ex

otics

Instre

am V

egeta

tion

Abse

ntFe

nced

ye

s - bo

th sid

esLa

ndus

e dr

ainag

e res

erve

- gr

azed

Flor

a an

d Fa

una

Valu

esTe

rrestr

ialAq

uatic

Fau

na

Poten

tial h

abita

t for D

warf

Galax

ias if

refug

epo

ols e

xist.

Aqua

tic H

abita

tC

omm

ents

Comm

ents

Exca

vatio

n lev

ee on

wes

tern

side -

unco

nsoli

dated

mate

rial, f

ill lef

t ove

r fro

mex

cava

tion.

Ris

kRi

sk of

sedim

ent t

rans

port

for tr

ench

ing

Mediu

mRi

sk of

sedim

ent t

rans

port

for pi

pe ja

cking

Me

dium

Risk

of flo

oding

for t

renc

hing

Mediu

mRi

sk of

flood

ing fo

r pipe

jack

ing

Low

Cons

tructi

on M

ethod

Tr

ench

ingM

itiga

tion

Stan

dard

Man

agem

ent M

easu

res

Cons

tructi

on m

anag

emen

t mea

sure

s and

Oper

ation

man

agem

ent m

easu

res

Spec

ific M

itigati

on

Minim

ise si

te dis

turba

nce,

weed

man

agem

ent,

Reins

tate e

xcav

ated p

rofile

, Rev

egeta

tion.

Prior

itise c

onstr

uctio

n dur

ing no

flow

perio

ds an

dco

-ord

inate

cons

tructi

on an

d re

instat

emen

t to

minim

ise du

ratio

n of e

xpos

ure,

Plac

emen

t of

clean

rock

for w

orkin

g pla

tform

, Stre

amflo

wdiv

ersio

n mea

sure

s

Cros

sing

Numb

er

541

Wate

rway

Nam

e Un

name

dW

aterw

ay T

ype

Wate

rcour

se C

hann

el Dr

ainNo

rthing

36

5080

Easti

ng

5776

581

Site

Visit

Com

plete

d No

Gen

eral

Rece

iving

Wate

r W

ester

n Por

tCl

assif

icatio

n Fa

rm/ro

ad dr

ain ch

anne

lised

Chan

nel P

lan F

orm

chan

nelis

edCa

tchme

nt Ar

ea (h

a)

7304

Typic

al Sl

ope @

POI

NT

400

Geolo

gical

Desc

riptio

n Pa

ludal:

lago

on an

d swa

mp de

posit

s: sil

t, clay

Inst

ream

feat

ures

Chan

nel W

idth

Top o

f Ban

k Widt

h ~4

mBa

nk H

eight

Bank

Sha

peCh

anne

l Stab

ility

Bank

Stab

ility

Featu

res

Freq

uenc

y of F

lowFl

oodp

lain

Fea

ture

s Flood

plain

featur

es

Nil

Flood

plain

Widt

h Un

confi

ned

Ripa

rian V

egeta

tion

Clea

red

Instre

am V

egeta

tion

Fenc

ed

NoLa

ndus

e Ag

ricult

ural

Flor

a an

d Fa

una

Valu

esTe

rrestr

ialAq

uatic

Fau

naAq

uatic

Hab

itat

Com

men

tsCo

mmen

tsR

isk

Risk

of se

dimen

t tra

nspo

rt for

tren

ching

Me

dium

Risk

of se

dimen

t tra

nspo

rt for

pipe

jack

ing

Mediu

mRi

sk of

flood

ing fo

r tre

nchin

g Me

dium

Risk

of flo

oding

for p

ipe ja

cking

Lo

wCo

nstru

ction

Meth

od

Tren

ching

No

site

imag

e av

aila

ble

at th

is tim

e

Miti

gatio

nSt

anda

rd M

anag

emen

t Mea

sure

s Co

nstru

ction

man

agem

ent m

easu

res a

ndOp

erati

on m

anag

emen

t mea

sure

sSp

ecific

Mitig

ation

Mi

nimise

site

distur

banc

e, we

ed m

anag

emen

t,Re

instat

e exc

avate

d pro

file, R

eveg

etatio

n,Pl

acem

ent o

f clea

n roc

k for

worki

ng pl

atfor

m,St

ream

flow

diver

sion m

easu

res

Cros

sing

Numb

er

542

Wate

rway

Nam

e De

ep C

reek

Catc

hmen

t Dra

inW

aterw

ay T

ype

MW C

hann

elNo

rthing

36

4134

Easti

ng

5776

525

Site

Visit

Com

plete

d Ye

sG

ener

alRe

ceivi

ng W

ater

Wes

tern P

ort

Clas

sifica

tion

Unco

nfine

d Cha

nneli

sed W

aterw

ayCh

anne

l Plan

For

m ch

anne

lised

wate

rway

Catch

ment

Area

(ha)

12

267

Typic

al Sl

ope @

POI

NT

Conto

urs i

nsuff

icien

tGe

ologic

al De

scrip

tion

Palud

al: la

goon

and s

wamp

depo

sits:

silt, c

layIn

stre

am fe

atur

esCh

anne

l Widt

h 2m

Top o

f Ban

k Widt

h 5m

Bank

Heig

ht 2m

Bank

Sha

pe

conv

ex up

ward

sCh

anne

l Stab

ility

stable

Bank

Stab

ility

erod

ingFe

ature

s Ni

lFr

eque

ncy o

f Flow

un

spec

ified

Floo

dpla

in F

eatu

res Flo

odpla

in fea

tures

lev

ee o

n wes

tern s

ideFlo

odpla

in W

idth

Unco

nfine

dRi

paria

n Veg

etatio

n Cl

eare

dIns

tream

Veg

etatio

n Ab

sent

Fenc

ed

on ea

stern

side

Land

use

agric

ultur

alFl

ora

and

Faun

a Va

lues

Terre

strial

Pr

edom

inantl

y intr

oduc

ed ve

getat

ion w

ith so

me

nativ

e sp

ecies

.Aq

uatic

Fau

na

Grow

ling G

rass

Fro

g rec

orde

d.Aq

uatic

Hab

itat

Poten

tial h

abita

t for D

warf

Galax

ias. N

othr

eaten

ed fis

h spe

cies w

ere r

ecor

ded.

Noins

tream

habit

at.C

omm

ents

Com

ments

St

ock a

cces

s. Up

strea

m of

culve

rt cro

ssing

atBa

llarto

Roa

d (~3

00m)

. Mino

r fra

gmen

ted

ripar

ian ve

getat

ion. E

merg

ent m

acro

phyte

s -Ph

ragm

ites s

pp. a

nd Ju

ncus

spp.

Clos

e to

RAM

SAR,

wate

rway

with

sign

ifican

t sed

imen

ttra

nspo

rt ca

pacit

y.

Ris

kRi

sk of

sedim

ent t

rans

port

for tr

ench

ing

Mediu

mRi

sk of

sedim

ent t

rans

port

for pi

pe ja

cking

Me

dium

Risk

of flo

oding

for t

renc

hing

Mediu

mRi

sk of

flood

ing fo

r pipe

jack

ing

Low

Cons

tructi

on M

ethod

Pi

pe ja

ck co

mbin

e with

543,

544 a

nd 5

45M

itiga

tion

Stan

dard

Man

agem

ent M

easu

res

Cons

tructi

on m

anag

emen

t mea

sure

s and

Oper

ation

man

agem

ent m

easu

res

Spec

ific M

itigati

on

Minim

ise si

te dis

turba

nce,

Cros

sing w

aterw

aype

rpen

dicula

r to a

lignm

ent, P

lacem

ent o

f clea

nro

ck fo

r wor

king p

latfor

m, S

tream

flow

diver

sion

meas

ures

, Avo

id lev

ee ba

nks,

Cons

tructi

on of

tempo

rary

levee

bank

s, W

eed m

anag

emen

t

Cros

sing

Numb

er

543

Wate

rway

Nam

e Lo

wer D

eep C

reek

Dra

inW

aterw

ay T

ype

MW C

hann

elNo

rthing

36

4089

Easti

ng

5776

530

Site

Visit

Com

plete

d Ye

sG

ener

alRe

ceivi

ng W

ater

Wes

tern P

ort

Clas

sifica

tion

Unco

nfine

d Cha

nneli

sed W

aterw

ayCh

anne

l Plan

For

m ch

anne

lised

wate

rway

Catch

ment

Area

(ha)

Typic

al Sl

ope @

POI

NT

Conto

urs i

nsuff

icien

tGe

ologic

al De

scrip

tion

Palud

al: la

goon

and s

wamp

depo

sits:

silt, c

layIn

stre

am fe

atur

esCh

anne

l Widt

h 5m

Top o

f Ban

k Widt

h 8m

Bank

Heig

ht 1m

Bank

Sha

pe

Conv

ex up

ward

Chan

nel S

tabilit

y St

able

Bank

Stab

ility

stable

Featu

res

Small

area

s of s

lumpin

gFr

eque

ncy o

f Flow

Pe

renn

ialFl

oodp

lain

Fea

ture

s Flood

plain

featur

es

Leve

eFlo

odpla

in W

idth

Unco

nfine

dRi

paria

n Veg

etatio

n cro

pIns

tream

Veg

etatio

n Ju

ncus

and

phra

gmite

sFe

nced

No

Land

use

graz

ed dr

ainag

e re

serve

Flor

a an

d Fa

una

Valu

esTe

rrestr

ialAq

uatic

Fau

naAq

uatic

Hab

itat

Com

men

tsCo

mmen

ts Cl

ose t

o RAM

SAR,

wate

rway

with

sign

ifican

tse

dimen

t tran

spor

t cap

acity

. Sma

ll are

as of

slum

ping i

nstre

am.

Ris

kRi

sk of

sedim

ent t

rans

port

for tr

ench

ing

Mediu

mRi

sk of

sedim

ent t

rans

port

for pi

pe ja

cking

Me

dium

Risk

of flo

oding

for t

renc

hing

Mediu

mRi

sk of

flood

ing fo

r pipe

jack

ing

Low

Cons

tructi

on M

ethod

Pi

pe ja

ck co

mbin

e with

542,

544 a

nd 5

45

Miti

gatio

nSt

anda

rd M

anag

emen

t Mea

sure

s Co

nstru

ction

man

agem

ent m

easu

res a

ndOp

erati

on m

anag

emen

t mea

sure

sSp

ecific

Mitig

ation

Mi

nimise

site

distur

banc

e, Cr

ossin

g wate

rway

perp

endic

ular t

o alig

nmen

t, Plac

emen

t of c

lean

rock

for w

orkin

g plat

form,

Stre

amflo

w div

ersio

nme

asur

es, A

void

levee

bank

s, Co

nstru

ction

oftem

pora

ry lev

ee ba

nks,

Wee

d man

agem

ent

Cros

sing

Numb

er

544

Wate

rway

Nam

e Lo

wer T

oomu

c Cre

ekW

aterw

ay T

ype

MW C

hann

elNo

rthing

36

4022

Easti

ng

5776

539

Site

Visit

Com

plete

d Ye

sG

ener

alRe

ceivi

ng W

ater

Wes

tern P

ort

Clas

sifica

tion

Unco

nfine

d Cha

nneli

sed W

aterw

ayCh

anne

l Plan

For

m ch

anne

lised

wate

rway

Catch

ment

Area

(ha)

12

251

Typic

al Sl

ope @

POI

NT

Conto

urs i

nsuff

icien

tGe

ologic

al De

scrip

tion

Palud

al: la

goon

and s

wamp

depo

sits:

silt, c

layIn

stre

am fe

atur

esCh

anne

l Widt

h 6m

Top o

f Ban

k Widt

h 10

mBa

nk H

eight

1.5m

Bank

Sha

pe

conv

ex up

ward

sCh

anne

l Stab

ility

Stab

leBa

nk S

tabilit

y St

able

Featu

res

levee

s on b

oth si

des

Freq

uenc

y of F

low

ephe

mera

lFl

oodp

lain

Fea

ture

s Flood

plain

featur

es

Nil

Flood

plain

Widt

h Un

confi

ned

Ripa

rian V

egeta

tion

Scatt

ered

Ti-tr

eeIns

tream

Veg

etatio

n Ph

ragm

ites

Fenc

ed

NoLa

ndus

e gr

azed

drain

age

rese

rveFl

ora

and

Faun

a Va

lues

Terre

strial

Re

colon

ised s

wamp

pape

rbar

k. G

rowl

ing G

rass

Frog

foun

d. P

otenti

al ha

bitat

for S

wam

p Skin

k,Gl

ossy

Gra

ss S

kink a

nd S

outhe

rn B

rown

Band

icoot

Aqua

tic F

auna

No

thre

atene

d fish

reco

rded

.Aq

uatic

Hab

itat

Com

men

tsCo

mme

nts

Swam

p Skin

k, Gl

ossy

Gra

ss S

kink,

South

ern

Brow

n Ban

dicoo

t, Gro

wling

Gra

ss F

rog a

nd D

warf

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ias.

Ris

kRi

sk of

sedim

ent t

rans

port

for tr

ench

ing

Mediu

mRi

sk of

sedim

ent t

rans

port

for pi

pe ja

cking

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dium

Risk

of flo

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renc

hing

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mRi

sk of

flood

ing fo

r pipe

jack

ing

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Cons

tructi

on M

ethod

Pi

pe ja

ck co

mbin

e with

542,

543 a

nd 5

45M

itiga

tion

Stan

dard

Man

agem

ent M

easu

res

Cons

tructi

on m

anag

emen

t mea

sure

s and

Oper

ation

man

agem

ent m

easu

res

Spec

ific M

itigati

on

Minim

ise si

te dis

turba

nce,

Cros

sing w

aterw

aype

rpen

dicula

r to a

lignm

ent, P

lacem

ent o

f clea

nro

ck fo

r wor

king p

latfor

m, S

tream

flow

diver

sion

meas

ures

, Avo

id lev

ee ba

nks,

Cons

tructi

on of

tempo

rary

levee

bank

s, W

eed m

anag

emen

t

Cros

sing

Numb

er

545

Wate

rway

Nam

e Lo

wer G

um S

crub C

reek

Wate

rway

Typ

e MW

Cha

nnel

North

ing

3639

85Ea

sting

57

7654

4Si

te Vi

sit C

omple

ted

Yes

Gen

eral

Rece

iving

Wate

r W

ester

n Por

tCl

assif

icatio

n Un

confi

ned C

hann

elise

d Wate

rway

Chan

nel P

lan F

orm

chan

nelis

ed w

aterw

ayCa

tchme

nt Ar

ea (h

a)

1224

8Ty

pical

Slop

e @ P

OINT

Fla

tGe

ologic

al De

scrip

tion

Palud

al: la

goon

and s

wamp

depo

sits:

silt, c

layIn

stre

am fe

atur

esCh

anne

l Widt

h 4m

Top o

f Ban

k Widt

h 9m

Bank

Heig

ht 2m

Bank

Sha

pe

conv

ex up

ward

sCh

anne

l Stab

ility

Stab

leBa

nk S

tabilit

y sta

bleFe

ature

s Ni

lFr

eque

ncy o

f Flow

ep

heme

ral

Floo

dpla

in F

eatu

res Flo

odpla

in fea

tures

lev

ees

Flood

plain

Widt

h Un

confi

ned

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rian V

egeta

tion

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eIns

tream

Veg

etatio

n Ph

ragm

ites

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ed

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ndus

e ro

ad re

serve

Flor

a an

d Fa

una

Valu

esTe

rrestr

ial

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ling G

rass

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g rec

orde

d. P

otenti

al ha

bitat

for S

outhe

rn B

rown

Ban

dicoo

tAq

uatic

Fau

naAq

uatic

Hab

itat

No in

strea

m ha

bitat

Com

men

tsCo

mmen

tsR

isk

Risk

of se

dimen

t tra

nspo

rt for

tren

ching

Me

dium

Risk

of se

dimen

t tra

nspo

rt for

pipe

jack

ing

Mediu

mRi

sk of

flood

ing fo

r tre

nchin

g Me

dium

Risk

of flo

oding

for p

ipe ja

cking

Lo

wCo

nstru

ction

Meth

od

Pipe

jack

com

bine w

ith 54

2, 54

3 and

544

Miti

gatio

nSt

anda

rd M

anag

emen

t Mea

sure

s Co

nstru

ction

man

agem

ent m

easu

res a

ndOp

erati

on m

anag

emen

t mea

sure

sSp

ecific

Mitig

ation

Mi

nimise

site

distur

banc

e, Cr

ossin

g wate

rway

perp

endic

ular t

o alig

nmen

t, Plac

emen

t of c

lean

rock

for w

orkin

g plat

form,

Stre

amflo

w div

ersio

nme

asur

es, C

onstr

uctio

n of te

mpor

ary l

evee

bank

s, W

eed m

anag

emen

t

Cros

sing

Numb

er

621

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rway

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e Ca

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inW

aterw

ay T

ype

North

ing

3622

51Ea

sting

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7720

0Si

te Vi

sit C

omple

ted

Yes

Gen

eral

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iving

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r W

ester

n Por

tCl

assif

icatio

n Un

confi

ned C

hann

elise

d Wate

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nel P

lan F

orm

chan

nelis

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ayCa

tchme

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ea (h

a)

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Slop

e @ P

OINT

Fla

tGe

ologic

al De

scrip

tion

Fluvia

l: allu

vium,

grav

el, sa

nd, s

iltIn

stre

am fe

atur

esCh

anne

l Widt

h 5m

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f Ban

k Widt

h 10

mBa

nk H

eight

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nk S

hape

co

nvex

upwa

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Chan

nel S

tabilit

y St

able

Bank

Stab

ility

stable

Featu

res

Scatt

ered

in-ch

anne

l catt

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gging

.Fr

eque

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f Flow

ep

heme

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eatu

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in fea

tures

lev

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n both

side

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odpla

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idth

Unco

nfine

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paria

n Veg

etatio

n pa

tches

of r

emna

nt ve

getat

ionIns

tream

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etatio

n Sc

atter

ed m

acro

phyte

s, m

ainly

limite

d to w

ater

edge

.Fe

nced

No

Land

use

drain

age r

eser

veFl

ora

and

Faun

a Va

lues

Terre

strial

No

poten

tial h

abita

t for s

ignific

ant fa

una.

Aqua

tic F

auna

Au

strali

an G

rayli

ng, D

warf

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iasAq

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itat

Com

men

tsCo

mme

nts

Cattle

acce

ss.

Ris

kRi

sk of

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ent t

rans

port

for tr

ench

ing

Mediu

mRi

sk of

sedim

ent t

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port

for pi

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Me

dium

Risk

of flo

oding

for t

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hing

Mediu

mRi

sk of

flood

ing fo

r pipe

jack

ing

Low

Cons

tructi

on M

ethod

Pi

pe ja

ck co

mbin

e with

622

Miti

gatio

nSt

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anag

emen

t Mea

sure

s Co

nstru

ction

man

agem

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easu

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emen

t mea

sure

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ecific

Mitig

ation

Mi

nimise

site

distur

banc

e, Cr

ossin

g wate

rway

perp

endic

ular t

o alig

nmen

t, Plac

emen

t of c

lean

rock

for w

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tform

, , Re

instat

emen

t of

exca

vated

pro

file, A

void

levee

bank

s, W

eed

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gem

ent.

Cros

sing

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er

622

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rway

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e Ca

rdini

a Catc

hmen

t Dra

inW

aterw

ay T

ype

North

ing

3622

04Ea

sting

57

7720

6Si

te Vi

sit C

omple

ted

Yes

Gen

eral

Rece

iving

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r W

ester

n Por

tCl

assif

icatio

n Un

confi

ned C

hann

elise

d Wate

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Chan

nel P

lan F

orm

chan

nelis

ed w

aterw

ayCa

tchme

nt Ar

ea (h

a)

1120

4Ty

pical

Slop

e @ P

OINT

Fla

tGe

ologic

al De

scrip

tion

Fluvia

l: allu

vium,

grav

el, sa

nd, s

iltIn

stre

am fe

atur

esCh

anne

l Widt

h 2m

Top o

f Ban

k Widt

h 6m

Bank

Heig

ht 1.5

mBa

nk S

hape

co

ncav

e upw

ards

Chan

nel S

tabilit

y sta

bleBa

nk S

tabilit

y sta

bleFe

ature

s Ni

lFr

eque

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f Flow

int

ermi

ttent

Floo

dpla

in F

eatu

res Flo

odpla

in fea

tures

Le

vee o

n ea

stern

side

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plain

Widt

h Un

confi

ned

Ripa

rian V

egeta

tion

patch

es o

f rem

nant

vege

tation

Instre

am V

egeta

tion

exoti

csFe

nced

Ye

s - on

wes

tern s

ideLa

ndus

e dr

ainag

e res

erve

Flor

a an

d Fa

una

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esTe

rrestr

ial

No po

tentia

l hab

itat fo

r sign

ifican

t faun

a.Aq

uatic

Fau

na

Austr

alian

Gra

yling

, Dwa

rf Ga

laxias

Aqua

tic H

abita

t No

instr

eam

habit

atC

omm

ents

Comm

ents

agric

ultur

al wi

th so

me re

veg s

ame

as 60

2.Ag

ricult

ural

with

some

reve

getat

ion. C

onsis

tent

with

same

as 60

3. M

ay su

ppor

t hab

itat a

ndmi

grato

ry pa

ssag

e for

Dwa

rf Ga

laxias

and

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alian

Gra

yling

.

Ris

kRi

sk of

sedim

ent t

rans

port

for tr

ench

ing

Mediu

mRi

sk of

sedim

ent t

rans

port

for pi

pe ja

cking

Me

dium

Risk

of flo

oding

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renc

hing

Mediu

mRi

sk of

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ing fo

r pipe

jack

ing

Low

Cons

tructi

on M

ethod

Pi

pe ja

ck co

mbin

e with

621

Miti

gatio

nSt

anda

rd M

anag

emen

t Mea

sure

s Co

nstru

ction

man

agem

ent m

easu

res a

ndOp

erati

on m

anag

emen

t mea

sure

sSp

ecific

Mitig

ation

Mi

nimise

site

distur

banc

e, Cr

ossin

g wate

rway

perp

endic

ular t

o alig

nmen

t, Plac

emen

t of c

lean

rock

for w

orkin

g pla

tform

, , Re

instat

emen

t of

exca

vated

pro

file, A

void

levee

bank

s, W

eed

mana

gem

ent.

Cros

sing

Numb

er

623

Wate

rway

Nam

eW

aterw

ay T

ype

Wate

rcour

se S

tream

North

ing

3597

62Ea

sting

57

7895

3Si

te Vi

sit C

omple

ted

Yes

Gen

eral

Rece

iving

Wate

r W

ester

n Por

tCl

assif

icatio

n Va

lley F

illCh

anne

l Plan

For

m ch

anne

lised

Catch

ment

Area

(ha)

75

8Ty

pical

Slop

e @ P

OINT

70

0Ge

ologic

al De

scrip

tion

Fluvia

l: allu

vium,

grav

el, sa

nd, s

iltIn

stre

am fe

atur

esCh

anne

l Widt

h 1.5

mTo

p of B

ank W

idth

3mBa

nk H

eight

0.5m

Bank

Sha

pe

Conc

ave

Chan

nel S

tabilit

y St

able

Bank

Stab

ility

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leFe

ature

s Ni

lFr

eque

ncy o

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int

ermi

ttent

Floo

dpla

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eatu

res Flo

odpla

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tures

Ni

lFlo

odpla

in W

idth

unco

nfine

dRi

paria

n Veg

etatio

n Cl

eare

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tream

Veg

etatio

n Ab

sent

Fenc

ed

NoLa

ndus

e ag

ricult

ural

Flor

a an

d Fa

una

Valu

esTe

rrestr

ialAq

uatic

Fau

naAq

uatic

Hab

itat

Com

men

tsCo

mmen

ts No

defin

ed be

d and

ban

ks.

Ris

kRi

sk of

sedim

ent t

rans

port

for tr

ench

ing

Low

Risk

of se

dimen

t tra

nspo

rt for

pipe

jack

ing

Low

Risk

of flo

oding

for t

renc

hing

Low

Risk

of flo

oding

for p

ipe ja

cking

Lo

wCo

nstru

ction

Meth

od

Tren

ching

Miti

gatio

nSt

anda

rd M

anag

emen

t Mea

sure

s Co

nstru

ction

man

agem

ent m

easu

res a

ndOp

erati

on m

anag

emen

t mea

sure

sSp

ecific

Mitig

ation

Mi

nimise

site

distur

banc

e, we

ed m

anag

emen

t,Re

instat

e exc

avate

d pro

file, R

eveg

etatio

n

Cros

sing

Numb

er

624

Wate

rway

Nam

eW

aterw

ay T

ype

Wate

rcour

se S

tream

North

ing

3594

09Ea

sting

57

7902

4Si

te Vi

sit C

omple

ted

Yes

Gen

eral

Rece

iving

Wate

r W

ester

n Por

tCl

assif

icatio

n Va

lley F

illCh

anne

l Plan

For

m ch

anne

lised

Catch

ment

Area

(ha)

59

9Ty

pical

Slop

e @ P

OINT

23

3Ge

ologic

al De

scrip

tion

Fluvia

l: allu

vium,

grav

el, sa

nd, s

iltIn

stre

am fe

atur

esCh

anne

l Widt

h 1m

Top o

f Ban

k Widt

h 2m

Bank

Heig

ht 0.3

mBa

nk S

hape

Co

ncav

eCh

anne

l Stab

ility

Stab

leBa

nk S

tabilit

y sta

bleFe

ature

s Ni

lFr

eque

ncy o

f Flow

int

ermi

ttent

Floo

dpla

in F

eatu

res Flo

odpla

in fea

tures

Da

mFlo

odpla

in W

idth

unco

nfine

dRi

paria

n Veg

etatio

n Cl

eare

dIns

tream

Veg

etatio

n Ab

sent

Fenc

ed

NoLa

ndus

e ag

ricult

ural

Flor

a an

d Fa

una

Valu

esTe

rrestr

ialAq

uatic

Fau

naAq

uatic

Hab

itat

Com

men

tsCo

mmen

ts Ch

anne

lised

valle

y fill.

Ris

kRi

sk of

sedim

ent t

rans

port

for tr

ench

ing

Low

Risk

of se

dimen

t tra

nspo

rt for

pipe

jack

ing

Low

Risk

of flo

oding

for t

renc

hing

Low

Risk

of flo

oding

for p

ipe ja

cking

Lo

wCo

nstru

ction

Meth

od

Tren

ching

Miti

gatio

nSt

anda

rd M

anag

emen

t Mea

sure

s Co

nstru

ction

man

agem

ent m

easu

res a

ndOp

erati

on m

anag

emen

t mea

sure

sSp

ecific

Mitig

ation

Mi

nimise

site

distur

banc

e, we

ed m

anag

emen

t,Re

instat

e exc

avate

d pro

file, R

eveg

etatio

n

Cros

sing

Numb

er

606

Wate

rway

Nam

eW

aterw

ay T

ype

Wate

rcour

se C

hann

el Dr

ainNo

rthing

35

7615

Easti

ng

5779

953

Site

Visit

Com

plete

d Ye

sG

ener

alRe

ceivi

ng W

ater

Wes

tern P

ort

Clas

sifica

tion

Valle

y Fill

Chan

nel P

lan F

orm

chan

nelis

edCa

tchme

nt Ar

ea (h

a)

93Ty

pical

Slop

e @ P

OINT

45

0Ge

ologic

al De

scrip

tion

Fluvia

l: san

dston

e, co

nglom

erate

, silts

tone

,iro

nston

eIn

stre

am fe

atur

esCh

anne

l Widt

h 1m

Top o

f Ban

k Widt

h 3m

Bank

Heig

ht 0.2

5mBa

nk S

hape

N/

ACh

anne

l Stab

ility

Stab

leBa

nk S

tabilit

y St

able

Featu

res

Nil

Freq

uenc

y of F

low

inter

mitte

ntFl

oodp

lain

Fea

ture

s Flood

plain

featur

es

Nil

Flood

plain

Widt

h un

confi

ned

Ripa

rian V

egeta

tion

Clea

red

Instre

am V

egeta

tion

Abse

ntFe

nced

No

Land

use

agric

ultur

alFl

ora

and

Faun

a Va

lues

Terre

strial

Aqua

tic F

auna

Aqua

tic H

abita

tC

omm

ents

Comm

ents

No cu

lvert,

prob

ably

drain

s to r

oad d

rain.

Land

owne

r said

that

flood

s occ

ur re

gular

ly du

ring

regu

lar ra

infall

.

Ris

kRi

sk of

sedim

ent t

rans

port

for tr

ench

ing

Low

Risk

of se

dimen

t tra

nspo

rt for

pipe

jack

ing

Low

Risk

of flo

oding

for t

renc

hing

Low

Risk

of flo

oding

for p

ipe ja

cking

Lo

wCo

nstru

ction

Meth

od

Tren

ching

Miti

gatio

nSt

anda

rd M

anag

emen

t Mea

sure

s Co

nstru

ction

man

agem

ent m

easu

res a

ndOp

erati

on m

anag

emen

t mea

sure

sSp

ecific

Mitig

ation

Mi

nimise

site

distur

banc

e, we

ed m

anag

emen

t,Re

instat

e exc

avate

d pro

file, R

eveg

etatio

n

Cros

sing

Numb

er

607

Wate

rway

Nam

eW

aterw

ay T

ype

Wate

rcour

se C

hann

el Dr

ainNo

rthing

35

5958

Easti

ng

5782

113

Site

Visit

Com

plete

d Ye

sG

ener

alRe

ceivi

ng W

ater

Port

Philli

p Bay

Clas

sifica

tion

Valle

y Fill

Chan

nel P

lan F

orm

chan

nelis

edCa

tchme

nt Ar

ea (h

a)Ty

pical

Slop

e @ P

OINT

Fla

tGe

ologic

al De

scrip

tion

Palud

al: la

goon

and s

wamp

depo

sits:

silt, c

layIn

stre

am fe

atur

esCh

anne

l Widt

h N/

ATo

p of B

ank W

idth

N/A

Bank

Heig

ht N/

ABa

nk S

hape

N/

ACh

anne

l Stab

ility

Stab

leBa

nk S

tabilit

y St

able

Featu

res

Nil

Freq

uenc

y of F

low

inter

mitte

ntFl

oodp

lain

Fea

ture

s Flood

plain

featur

es

Nil

Flood

plain

Widt

h un

confi

ned

Ripa

rian V

egeta

tion

Clea

red

Instre

am V

egeta

tion

Abse

ntFe

nced

No

Land

use

agric

ultur

alFl

ora

and

Faun

a Va

lues

Terre

strial

Aqua

tic F

auna

Aqua

tic H

abita

tC

omm

ents

Comm

ents

Only

sligh

tly d

efine

d bed

and

bank

s.R

isk

Risk

of se

dimen

t tra

nspo

rt for

tren

ching

Lo

wRi

sk of

sedim

ent t

rans

port

for pi

pe ja

cking

Lo

wRi

sk of

flood

ing fo

r tre

nchin

g Lo

wRi

sk of

flood

ing fo

r pipe

jack

ing

Low

Cons

tructi

on M

ethod

Tr

ench

ing

Miti

gatio

nSt

anda

rd M

anag

emen

t Mea

sure

s Co

nstru

ction

man

agem

ent m

easu

res a

ndOp

erati

on m

anag

emen

t mea

sure

sSp

ecific

Mitig

ation

Mi

nimise

site

distur

banc

e, we

ed m

anag

emen

t,Re

instat

e exc

avate

d pro

file, R

eveg

etatio

n

Cros

sing

Numb

er

608

Wate

rway

Nam

eW

aterw

ay T

ype

Wate

rcour

se C

hann

el Dr

ainNo

rthing

35

5843

Easti

ng

5782

263

Site

Visit

Com

plete

d Ye

sG

ener

alRe

ceivi

ng W

ater

Port

Philli

p Bay

Clas

sifica

tion

Valle

y Fill

Chan

nel P

lan F

orm

chan

nelis

edCa

tchme

nt Ar

ea (h

a)Ty

pical

Slop

e @ P

OINT

Fla

tGe

ologic

al De

scrip

tion

Palud

al: la

goon

and s

wamp

depo

sits:

silt, c

layIn

stre

am fe

atur

esCh

anne

l Widt

h 0.2

mTo

p of B

ank W

idth

2mBa

nk H

eight

0.2m

Bank

Sha

pe

V-sh

ape

Chan

nel S

tabilit

y St

able

Bank

Stab

ility

Stab

leFe

ature

s Ni

lFr

eque

ncy o

f Flow

int

ermi

ttent

Floo

dpla

in F

eatu

res Flo

odpla

in fea

tures

Ni

lFlo

odpla

in W

idth

unco

nfine

dRi

paria

n Veg

etatio

n Cl

eare

dIns

tream

Veg

etatio

n Ab

sent

Fenc

ed

NoLa

ndus

e ag

ricult

ural

Flor

a an

d Fa

una

Valu

esTe

rrestr

ialAq

uatic

Fau

naAq

uatic

Hab

itat

Com

men

tsCo

mmen

ts Sl

ightly

defi

ned b

ed a

nd ba

nks.

Ris

kRi

sk of

sedim

ent t

rans

port

for tr

ench

ing

Low

Risk

of se

dimen

t tra

nspo

rt for

pipe

jack

ing

Low

Risk

of flo

oding

for t

renc

hing

Low

Risk

of flo

oding

for p

ipe ja

cking

Lo

wCo

nstru

ction

Meth

od

Tren

ching

Miti

gatio

nSt

anda

rd M

anag

emen

t Mea

sure

s Co

nstru

ction

man

agem

ent m

easu

res a

ndOp

erati

on m

anag

emen

t mea

sure

sSp

ecific

Mitig

ation

Mi

nimise

site

distur

banc

e, we

ed m

anag

emen

t,Re

instat

e exc

avate

d pro

file, R

eveg

etatio

n

Cros

sing

Numb

er

609

Wate

rway

Nam

eW

aterw

ay T

ype

Wate

rcour

se C

hann

el Dr

ainNo

rthing

35

4847

Easti

ng

5783

553

Site

Visit

Com

plete

d Ye

sG

ener

alRe

ceivi

ng W

ater

Port

Philli

p Bay

Clas

sifica

tion

Farm

/road

drain

chan

nelis

edCh

anne

l Plan

For

m ch

anne

lised

Catch

ment

Area

(ha)

26

7Ty

pical

Slop

e @ P

OINT

Fla

tGe

ologic

al De

scrip

tion

Palud

al: la

goon

and s

wamp

depo

sits:

silt, c

layIn

stre

am fe

atur

esCh

anne

l Widt

h 2m

Top o

f Ban

k Widt

h 2m

Bank

Heig

ht 2m

Bank

Sha

pe

Vertic

alCh

anne

l Stab

ility

Stab

leBa

nk S

tabilit

y St

able

Featu

res

Nil

Freq

uenc

y of F

low

unsp

ecifie

dFl

oodp

lain

Fea

ture

s Flood

plain

featur

es

Nil

Flood

plain

Widt

h un

confi

ned

Ripa

rian V

egeta

tion

Patch

es of

remn

ant v

egeta

tion

Instre

am V

egeta

tion

Abse

ntFe

nced

No

Land

use

Agric

ultur

alFl

ora

and

Faun

a Va

lues

Terre

strial

Aqua

tic F

auna

Aqua

tic H

abita

tC

omm

ents

Comm

ents

Stra

ight (

bush

es al

ong d

rain

indica

te ali

gnm

ent)

-Ti-

tree a

long c

hann

el.R

isk

Risk

of se

dimen

t tra

nspo

rt for

tren

ching

Lo

wRi

sk of

sedim

ent t

rans

port

for pi

pe ja

cking

Lo

wRi

sk of

flood

ing fo

r tre

nchin

g Lo

wRi

sk of

flood

ing fo

r pipe

jack

ing

Low

Cons

tructi

on M

ethod

Tr

ench

ing

Miti

gatio

nSt

anda

rd M

anag

emen

t Mea

sure

s Co

nstru

ction

man

agem

ent m

easu

res a

ndOp

erati

on m

anag

emen

t mea

sure

sSp

ecific

Mitig

ation

Mi

nimise

site

distur

banc

e, we

ed m

anag

emen

t,Re

instat

e exc

avate

d pro

file, R

eveg

etatio

n

Cros

sing

Numb

er

619

Wate

rway

Nam

e Ti-

Tree

Cre

ek D

.S.

Wate

rway

Typ

eNo

rthing

35

4664

Easti

ng

5783

790

Site

Visit

Com

plete

d Ye

sG

ener

alRe

ceivi

ng W

ater

Port

Philli

p Bay

Clas

sifica

tion

Unco

nfine

d Cha

nneli

sed W

aterw

ayCh

anne

l Plan

For

m ch

anne

lised

Catch

ment

Area

(ha)

13

21Ty

pical

Slop

e @ P

OINT

Geolo

gical

Desc

riptio

n Flu

vial: s

ands

tone,

cong

lomer

ate, s

iltsto

ne,

irons

tone

Inst

ream

feat

ures

Chan

nel W

idth

6mTo

p of B

ank W

idth

8mBa

nk H

eight

1mBa

nk S

hape

co

nvex

upwa

rdCh

anne

l Stab

ility

Stab

leBa

nk S

tabilit

y St

able

Featu

res

Nil

Freq

uenc

y of F

low

ephe

mera

lFl

oodp

lain

Fea

ture

s Flood

plain

featur

es

Nil

Flood

plain

Widt

h un

confi

ned

Ripa

rian V

egeta

tion

Scatt

ered

Instre

am V

egeta

tion

Bull r

ush a

nd ex

otics

Fenc

ed

NoLa

ndus

e ag

ricult

ural

Flor

a an

d Fa

una

Valu

esTe

rrestr

ialAq

uatic

Fau

naAq

uatic

Hab

itat

Com

men

tsCo

mmen

tsR

isk

Risk

of se

dimen

t tra

nspo

rt for

tren

ching

Lo

wRi

sk of

sedim

ent t

rans

port

for pi

pe ja

cking

Lo

wRi

sk of

flood

ing fo

r tre

nchin

g Lo

wRi

sk of

flood

ing fo

r pipe

jack

ing

Low

Cons

tructi

on M

ethod

Tr

ench

ing

Miti

gatio

nSt

anda

rd M

anag

emen

t Mea

sure

s Co

nstru

ction

man

agem

ent m

easu

res a

ndOp

erati

on m

anag

emen

t mea

sure

sSp

ecific

Mitig

ation

Mi

nimise

site

distur

banc

e, Cr

ossin

g wate

rway

perp

endic

ular t

o alig

nmen

t, wee

d man

agem

ent,

reins

tate

exca

vated

pro

file, r

eveg

etatio

n

Cros

sing

Numb

er

620

Wate

rway

Nam

e Ti-

Tree

Cre

ek D

.S.

Wate

rway

Typ

eNo

rthing

35

4313

Easti

ng

5784

619

Site

Visit

Com

plete

d Ye

sG

ener

alRe

ceivi

ng W

ater

Port

Philli

p Bay

Clas

sifica

tion

Unco

nfine

d Sinu

ous W

aterw

ayCh

anne

l Plan

For

m sin

uous

Catch

ment

Area

(ha)

37

2Ty

pical

Slop

e @ P

OINT

Geolo

gical

Desc

riptio

n Pa

ludal:

lago

on an

d swa

mp de

posit

s: sil

t, clay

Inst

ream

feat

ures

Chan

nel W

idth

8mTo

p of B

ank W

idth

7mBa

nk H

eight

1.5m

Bank

Sha

pe

conv

ex up

ward

sCh

anne

l Stab

ility

Stab

leBa

nk S

tabilit

y St

able

Featu

res

Pools

, run

sFr

eque

ncy o

f Flow

Pe

renn

ialFl

oodp

lain

Fea

ture

s Flood

plain

featur

esFlo

odpla

in W

idth

Unco

nfine

dRi

paria

n Veg

etatio

n Cl

eare

dIns

tream

Veg

etatio

n Ma

croph

ytes

Fenc

ed

NoLa

ndus

e Ur

ban

Flor

a an

d Fa

una

Valu

esTe

rrestr

ialAq

uatic

Fau

na

Dwar

f Gala

xias

Aqua

tic H

abita

tC

omm

ents

Comm

ents

Crea

ting w

etlan

ds ad

jacen

t to ur

ban a

rea w

hich

will f

low to

wate

rway

imme

diatel

y dow

nstre

amfro

m cro

ssing

poin

t.R

isk

Risk

of se

dimen

t tra

nspo

rt for

tren

ching

Me

dium

Risk

of se

dimen

t tra

nspo

rt for

pipe

jack

ing

Low

Risk

of flo

oding

for t

renc

hing

Low

Risk

of flo

oding

for p

ipe ja

cking

Lo

wCo

nstru

ction

Meth

od

Pipe

Jack

Miti

gatio

nSt

anda

rd M

anag

emen

t Mea

sure

s Co

nstru

ction

man

agem

ent m

easu

res a

ndOp

erati

on m

anag

emen

t mea

sure

sSp

ecific

Mitig

ation

Mi

nimise

site

distur

banc

e, Cr

ossin

g wate

rway

perp

endic

ular t

o alig

nmen

t, wee

d man

agem

ent,

reins

tate

exca

vated

pro

file, r

eveg

etatio

n

Cros

sing

Numb

er

618

Wate

rway

Nam

eW

aterw

ay T

ype

Wate

rcour

se S

tream

North

ing

3547

43Ea

sting

57

8507

1Si

te Vi

sit C

omple

ted

NoG

ener

alRe

ceivi

ng W

ater

Port

Philli

p Bay

Clas

sifica

tion

Partia

lly C

onfin

ed C

hann

elise

d Wate

rway

sCh

anne

l Plan

For

m ch

anne

lised

Catch

ment

Area

(ha)

11

2Ty

pical

Slop

e @ P

OINT

10

0Ge

ologic

al De

scrip

tion

Marin

e: mu

dston

e, sa

ndsto

neIn

stre

am fe

atur

esCh

anne

l Widt

h N/

ATo

p of B

ank W

idth

N/A

Bank

Heig

ht N/

ABa

nk S

hape

N/

ACh

anne

l Stab

ility

N/A

Bank

Stab

ility

N/A

Featu

res

N/A

Freq

uenc

y of F

low

inter

mitte

ntFl

oodp

lain

Fea

ture

s Flood

plain

featur

es

Hous

ing de

velop

ment

on bo

th sid

esFlo

odpla

in W

idth

Unco

nfine

dRi

paria

n Veg

etatio

n Cl

eare

dIns

tream

Veg

etatio

n Ab

sent

Fenc

ed

NoLa

ndus

e Ur

ban h

ousin

g de

velop

men

tFl

ora

and

Faun

a Va

lues

Terre

strial

Aqua

tic F

auna

Aqua

tic H

abita

tC

omm

ents

Comm

ents

Urba

n hou

sing d

evelo

pmen

t on b

oth si

des.

Chan

nel fi

lled i

n at c

ross

ing po

int. S

tormw

ater

flows

being

conv

eyed

by u

nder

grou

nd pi

pe.

Cons

tructi

on sh

ould

avoid

unde

rgro

und p

ipe an

dcu

lvert

syste

m.

Ris

kRi

sk of

sedim

ent t

rans

port

for tr

ench

ing

Mediu

mRi

sk of

sedim

ent t

rans

port

for pi

pe ja

cking

Lo

wRi

sk of

flood

ing fo

r tre

nchin

g Lo

wRi

sk of

flood

ing fo

r pipe

jack

ing

Low

Cons

tructi

on M

ethod

Tr

ench

ingM

itiga

tion

Stan

dard

Man

agem

ent M

easu

res

Cons

tructi

on m

anag

emen

t mea

sure

s and

Oper

ation

man

agem

ent m

easu

res

Spec

ific M

itigati

on

Minim

ise si

te dis

turba

nce,

Cros

sing w

aterw

aype

rpen

dicula

r to a

lignm

ent, w

eed m

anag

emen

t,re

instat

e ex

cava

ted p

rofile

, rev

egeta

tion,

Minim

ise co

nstric

tion t

o floo

dplai

n, an

d dur

ation

ofwo

rks fo

r con

struc

tion

perio

d. A

void

distur

banc

eto

unde

rgro

und d

raina

ge pi

pe at

cros

sing.

Cre

ated

from

G:\3

1\22

4461

3\Te

ch\W

ater

way

_Cro

ssin

g_In

fo_P

rofo

rmas

\Pip

elin

e\Pi

pelin

e_C

urre

nt_C

urre

nt_1

6_Ju

ly_2

008.

xls o

n 25

Jul

200

8 at

1:1

0:12

PM

Appendix E

Waterway Crossing Risk Assessment


GH

Dw

ww

.ghd

.com

.au

Tel.

(03)

868

7 80

00 F

ax. (

03) 8

687

8111

180

Lons

dale

Stre

et M

elbo

urne

Vic

300

0

WaterwayCrossing Number

Project Phase

ConstructionMethod

Impact

Consequence

Likelihood

Risk Rank

Project Phase

ConstructionMethod

Impact

Consequence

Likelihood

Risk Rank

103

Con

stru

ctio

nTr

ench

ing

Sedi

men

t tra

nspo

rtM

inor

Rar

eLO

WC

onst

ruct

ion

Pipe

Jac

king

Sedi

men

t tra

nspo

rtIn

sign

ifica

ntU

nlik

ely

LOW

104

Con

stru

ctio

nTr

ench

ing

Sedi

men

t tra

nspo

rtM

inor

Rar

eLO

WC

onst

ruct

ion

Pipe

Jac

king

Sedi

men

t tra

nspo

rtIn

sign

ifica

ntU

nlik

ely

LOW

105

Con

stru

ctio

nTr

ench

ing

Sedi

men

t tra

nspo

rtM

oder

ate

Alm

ost C

erta

inH

IGH

Con

stru

ctio

nPi

pe J

acki

ngSe

dim

ent t

rans

port

Mod

erat

eLi

kely

MED

IUM

119

Con

stru

ctio

nTr

ench

ing

Sedi

men

t tra

nspo

rtM

oder

ate

Like

lyM

EDIU

MC

onst

ruct

ion

Pipe

Jac

king

Sedi

men

t tra

nspo

rtM

oder

ate

Unl

ikel

yM

EDIU

M

120

Con

stru

ctio

nTr

ench

ing

Sedi

men

t tra

nspo

rtM

oder

ate

Like

lyM

EDIU

MC

onst

ruct

ion

Pipe

Jac

king

Sedi

men

t tra

nspo

rtM

oder

ate

Unl

ikel

yM

EDIU

M

110

Con

stru

ctio

nTr

ench

ing

Sedi

men

t tra

nspo

rtIn

sign

ifica

ntR

are

LOW

Con

stru

ctio

nPi

pe J

acki

ngSe

dim

ent t

rans

port

Insi

gnifi

cant

Unl

ikel

yLO

W

122

Con

stru

ctio

nTr

ench

ing

Sedi

men

t tra

nspo

rtM

inor

Unl

ikel

yLO

WC

onst

ruct

ion

Pipe

Jac

king

Sedi

men

t tra

nspo

rtM

inor

Unl

ikel

yLO

W

112

Con

stru

ctio

nTr

ench

ing

Sedi

men

t tra

nspo

rtIn

sign

ifica

ntR

are

LOW

Con

stru

ctio

nPi

pe J

acki

ngSe

dim

ent t

rans

port

Insi

gnifi

cant

Rar

eLO

W

113

Con

stru

ctio

nTr

ench

ing

Sedi

men

t tra

nspo

rtIn

sign

ifica

ntR

are

LOW

Con

stru

ctio

nPi

pe J

acki

ngSe

dim

ent t

rans

port

Insi

gnifi

cant

Rar

eLO

W

114

Con

stru

ctio

nTr

ench

ing

Sedi

men

t tra

nspo

rtIn

sign

ifica

ntR

are

LOW

Con

stru

ctio

nPi

pe J

acki

ngSe

dim

ent t

rans

port

Insi

gnifi

cant

Rar

eLO

W

115

Con

stru

ctio

nTr

ench

ing

Sedi

men

t tra

nspo

rtIn

sign

ifica

ntR

are

LOW

Con

stru

ctio

nPi

pe J

acki

ngSe

dim

ent t

rans

port

Insi

gnifi

cant

Rar

eLO

W

116

Con

stru

ctio

nTr

ench

ing

Sedi

men

t tra

nspo

rtM

inor

Like

lyM

EDIU

MC

onst

ruct

ion

Pipe

Jac

king

Sedi

men

t tra

nspo

rtM

inor

Rar

eLO

W

123

Con

stru

ctio

nTr

ench

ing

Sedi

men

t tra

nspo

rtM

inor

Like

lyM

EDIU

MC

onst

ruct

ion

Pipe

Jac

king

Sedi

men

t tra

nspo

rtM

inor

Like

lyM

EDIU

M

124

Con

stru

ctio

nTr

ench

ing

Sedi

men

t tra

nspo

rtM

inor

Like

lyM

EDIU

MC

onst

ruct

ion

Pipe

Jac

king

Sedi

men

t tra

nspo

rtM

inor

Like

lyM

EDIU

M

121

Con

stru

ctio

nTr

ench

ing

Sedi

men

t tra

nspo

rtIn

sign

ifica

ntR

are

LOW

Con

stru

ctio

nPi

pe J

acki

ngSe

dim

ent t

rans

port

Insi

gnifi

cant

Rar

eLO

W

219

Con

stru

ctio

nTr

ench

ing

Sedi

men

t tra

nspo

rtM

inor

Like

lyM

EDIU

MC

onst

ruct

ion

Pipe

Jac

king

Sedi

men

t tra

nspo

rtM

inor

Unl

ikel

yLO

W

220

Con

stru

ctio

nTr

ench

ing

Sedi

men

t tra

nspo

rtM

inor

Unl

ikel

yLO

WC

onst

ruct

ion

Pipe

Jac

king

Sedi

men

t tra

nspo

rtIn

sign

ifica

ntU

nlik

ely

LOW

228

Con

stru

ctio

nTr

ench

ing

Sedi

men

t tra

nspo

rtIn

sign

ifica

ntU

nlik

ely

LOW

Con

stru

ctio

nPi

pe J

acki

ngSe

dim

ent t

rans

port

Insi

gnifi

cant

Rar

eLO

W

229

Con

stru

ctio

nTr

ench

ing

Sedi

men

t tra

nspo

rtM

inor

Like

lyM

EDIU

MC

onst

ruct

ion

Pipe

Jac

king

Sedi

men

t tra

nspo

rtM

inor

Rar

eLO

W

208

Con

stru

ctio

nTr

ench

ing

Sedi

men

t tra

nspo

rtIn

sign

ifica

ntR

are

LOW

Con

stru

ctio

nPi

pe J

acki

ngSe

dim

ent t

rans

port

Insi

gnifi

cant

Rar

eLO

W

230

Con

stru

ctio

nTr

ench

ing

Sedi

men

t tra

nspo

rtM

oder

ate

Unl

ikel

yM

EDIU

MC

onst

ruct

ion

Pipe

Jac

king

Sedi

men

t tra

nspo

rtM

oder

ate

Rar

eLO

W

212

Con

stru

ctio

nTr

ench

ing

Sedi

men

t tra

nspo

rtM

oder

ate

Unl

ikel

yM

EDIU

MC

onst

ruct

ion

Pipe

Jac

king

Sedi

men

t tra

nspo

rtM

oder

ate

Unl

ikel

yM

EDIU

M

213

Con

stru

ctio

nTr

ench

ing

Sedi

men

t tra

nspo

rtIn

sign

ifica

ntR

are

LOW

Con

stru

ctio

nPi

pe J

acki

ngSe

dim

ent t

rans

port

Insi

gnifi

cant

Rar

eLO

W

214

Con

stru

ctio

nTr

ench

ing

Sedi

men

t tra

nspo

rtM

inor

Unl

ikel

yLO

WC

onst

ruct

ion

Pipe

Jac

king

Sedi

men

t tra

nspo

rtM

inor

Unl

ikel

yLO

W

231

Con

stru

ctio

nTr

ench

ing

Sedi

men

t tra

nspo

rtM

inor

Like

lyM

EDIU

MC

onst

ruct

ion

Pipe

Jac

king

Sedi

men

t tra

nspo

rtM

inor

Unl

ikel

yLO

W

223

Con

stru

ctio

nTr

ench

ing

Sedi

men

t tra

nspo

rtM

inor

Unl

ikel

yLO

WC

onst

ruct

ion

Pipe

Jac

king

Sedi

men

t tra

nspo

rtM

inor

Rar

eLO

W

224

Con

stru

ctio

nTr

ench

ing

Sedi

men

t tra

nspo

rtM

ajor

Cer

tain

CR

ITIC

ALC

onst

ruct

ion

Pipe

Jac

king

Sedi

men

t tra

nspo

rtM

oder

ate

Unl

ikel

yM

EDIU

M

Spec

ific

Impa

ct O

ne: S

edim

ent T

rans

port

Ris

k As

soci

ated

with

Tre

nchi

ngSp

ecifi

c Im

pact

Tw

o: S

edim

ent T

rans

port

Ris

k A

ssoc

iate

d w

ith P

ipe

Jack

ing

Shee

t1G

:\31\

2244

613\

Tech

\Ris

k As

sess

men

t\Pip

elin

e_Fi

nal R

isk

Asse

ssm

ent_

Keep

mos

t cur

rent

ver

sion

her

e O

NLY

\Wat

erw

ays

Ris

k Ta

ble

Rev

_E.x

ls28

/07/

2008

5:5

3 PM

Page

1 o

f 8

GH

Dw

ww

.ghd

.com

.au

Tel.

(03)

868

7 80

00 F

ax. (

03) 8

687

8111

180

Lons

dale

Stre

et M

elbo

urne

Vic

300

0


Project Phase

ConstructionMethod

Impact

Consequence

Likelihood

Risk Rank

Project Phase

ConstructionMethod

Impact

Consequence

Likelihood

Risk Rank

Spec

ific

Impa

ct O

ne: S

edim

ent T

rans

port

Ris

k As

soci

ated

with

Tre

nchi

ngSp

ecifi

c Im

pact

Tw

o: S

edim

ent T

rans

port

Ris

k A

ssoc

iate

d w

ith P

ipe

Jack

ing

225

Con

stru

ctio

nTr

ench

ing

Sedi

men

t tra

nspo

rtIn

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t1G

:\31\

2244

613\

Tech

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k As

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_E.x

ls28

/07/

2008

5:5

3 PM

Page

2 o

f 8

GH

Dw

ww

.ghd

.com

.au

Tel.

(03)

868

7 80

00 F

ax. (

03) 8

687

8111

180

Lons

dale

Stre

et M

elbo

urne

Vic

300

0


Project Phase

ConstructionMethod

Impact

Consequence

Likelihood

Risk Rank

Project Phase

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Spec

ific

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ct O

ne: S

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ent T

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port

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o: S

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t1G

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2244

613\

Tech

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ble

Rev

_E.x

ls28

/07/

2008

5:5

3 PM

Page

3 o

f 8

GH

Dw

ww

.ghd

.com

.au

Tel.

(03)

868

7 80

00 F

ax. (

03) 8

687

8111

180

Lons

dale

Stre

et M

elbo

urne

Vic

300

0


Project Phase

ConstructionMethod

Impact

Consequence

Likelihood

Risk Rank

Project Phase

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Impact

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Spec

ific

Impa

ct O

ne: S

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ent T

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port

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k As

soci

ated

with

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ngSp

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c Im

pact

Tw

o: S

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ent T

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port

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k A

ssoc

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Bianca McCormack

From: Meg LeeSent: Monday, 14 September 2020 1:52 PMTo: Meg Lee; Bianca McCormackCc: [email protected]: FW: Crib Point IAC - Instructions regarding response to submissions [ASH-

AUS.FID30132288]Attachments: Environment Victoria submission form - for experts.docx

Dear Expert Witnesses

The IAC has received 3,829 public submissions in relation to the Crib Point LNG Import Facility.

Approximately 2,401 of those submissions appear to be generated by a common website.

The following link contains all 3,829 submissions, grouped into three categories:

• submissions that have been generated with the assistance of the common website (category A);

• submissions which have not been generated with the assistance of the common website (category B); and

• submissions which are a mix of category A and B (category C).

Link to all submissions: https://ashurst.sharefile.com/d-s21633649b0a4b8f8

These have also been placed on the Collaborate portal in the Submissions Folder<Environment Victoria Subfolderhere: https://collaborate.hallandwilcox.com.au/haw/documentHome.action?metaData.siteID=1491&metaData.parentFolderID=24011

We are reviewing the submissions in parallel and will identify those submissions we consider are particularly relevantto your witness statement. However, we would like you to independently consider all submissions which arepotentially relevant to your evidence.

General responses to submissions

For the efficient preparation of your statement and to assist the IAC, you may choose to respond to submissions by addressing the "key themes" raised in the submissions as relevant to your area of expertise. You do not need toidentify how many people raised that theme or which specific submitters referred to the key themes (subject to theagencies/groups identified below).

If there is a particular individual submission that raises a unique issue you should still respond.

We attach a document which extracts the common wording produced by that website. If you read the attached document you will have read and canvassed the propositions in each of those Category A submissions.

If you need our guidance as to how to express or articulate the "key themes", please let us know.

Agency / Group / pipeline landowner submissions

You should provide separate responses to each of the agencies/groups/landowners listed at the bottom of this email,to the extent relevant to your witness statement.

If the agency/group submitter:

• raises concerns that are adequately addressed by your response to the key themes raised by other submitters, you may wish to respond by referring to your responses to the key themes; or

• raises concerns not addressed by a key theme, please address this with a specific response to the keysubmitter's submission.

List of agencies / groups / landowners along the pipeline

2

# Organisation Submission no.

Agency / group submissions

Australian Industry Group submission 365

Bass Coast Shire Council 2665

Bunurong Land Council Aboriginal Corporation 2870

Cardinia Shire Council 2805

Commonwealth Department of Agriculture, Water & the Environment

2871

Department of Transport 1357

EPA Victoria 2671

Environment Victoria 3088

Major Road Projects Victoria 1461

Mornington Peninsula Shire 2276

Port of Hastings Development Authority (PoHDA) 2700

Sea Shepherd 2617

Trust for Nature 2558

Victorian Chamber of Commerce 2546

Victorian National Parks Association 3004

Victorian Planning Authority 234

Landowners along the pipeline

1. 978

2. 1069

3. 1303

4. 1305

5. 1309

6. 1685

7. 2307

8. 3777

Kind regards

Meg Lee | Partner T +61 3 9603 3312 | F +61 3 9670 9632 | M +61 404 070 549 [email protected] | professional profile


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Environment Victoria submission form

1. What is your connection to Westernport Bay? *

• I live in the Westernport Bay area.

My name is XX and I live in the Westernport Bay area.

• I visit Westernport Bay often.

My name is XXX and I visit Westernport Bay often.

• I care about the environment in Westernport Bay.

My name is XXX and I care about the environment in Westernport Bay.

• I have family who live in Westernport Bay.

My name is XXX and I have family who live in Westernport Bay.

2. Can you describe why Westernport Bay is important to you? (You can use up to 250 characters)

3. What concerns you the most about the gas import terminal? *

• The impact on the local community.

I thank the Crib Point Inquiry and Advisory Committee and the Minister for Planning for the opportunity to make a submission to the environment assessment of the Crib Point gas import jetty and gas pipeline project. There are a variety of issues which should deem this proposal unacceptable under its current form and that I will point to in my submission but the issue that concerns me most is the impact on the local community.

• The impact on our internationally recognised wetlands and wildlife.

I thank the Crib Point Inquiry and Advisory Committee and the Minister for Planning for the opportunity to make a submission to the environment assessment of the Crib Point gas import jetty and gas pipeline project. There are a variety of issues which should deem this proposal unacceptable under its current form and that I will point to in my submission but the issue that concerns me most is the impact on our internationally recognised wetlands and wildlife.

• The negative impact on greenhouse gas emissions in Victoria.

I thank the Crib Point Inquiry and Advisory Committee and the Minister for Planning for the opportunity to make a submission to the environment assessment of the Crib Point gas import jetty and gas pipeline project. There are a variety of issues which should deem this proposal unacceptable under its current form and that I will point to in my submission but the issue that concerns me most is the negative impact on greenhouse gas emissions in Victoria.

4. How do you think the industrialisation of Westernport Bay will impact people? (If more than one applies, pick the one that most concerns you)

• Recreational impacts: such as impacts to fishing, boating, walking, or other opportunities to enjoy the Bay with family and friends.

The beach and reserve area around Crib Point jetty is a popular spot for residents and visitors alike. Access to the reserve and surrounding areas is likely to be affected by the loss of bush or by disruptions because of maintenance or high noise. The EES notes that there is not a comparable reserve area nearby. The increased number of ships coming into Westernport Bay and the strict exclusion zones will mean boaters or sailors will have more disruptive ship traffic to contend with.


Fishers will enjoy less catch as a result of the impact of increased shipping and toxic chlorination of the important nursery seagrass surrounding the Crib Point jetty.

• Mental health impacts: due to loss of nature, or continual exposure to noise, light and visual pollution.

Natural environments play a crucial role in both the mental and physical health of the communities who access them. The potential loss of nature and access to green spaces can contribute to mental distress and environmental grief experienced by communities who place significance on these areas. This can detrimentally impact on the long-term mental health of a community. Excessive exposure to noise and light pollution in areas of recreation or among households can result in loss of sleep and irritability. As well as increased prevalence of anxiety and a lack of ability to focus. The impacts of noise and light pollution can result in increased prevalence of mental health conditions in a community.

• There is an unacceptable risk of fire, explosion and exposure to toxic hydrocarbons.

A new fossil fuel project like the gas import terminal which AGL is proposing would introduce new risks to the local community and visitors to the area. These risks include exposing people to toxic hydrocarbons which may leak from the facility and increased risk of accidental fire and explosion as noted in EES Technical Report K. The nearest homes to the import facility are about 1.5 kms away and Wooleys Beach is also close to the site. AGL have completed only preliminary quantitative risk assessments on these risks and have deemed the risk acceptable on that basis. It is not acceptable to present preliminary studies and the EES should not continue until we have an independent expert to provide final risk assessments.

5. Do you think this will also impact the local economy through its impact on tourism and recreation activities?

• Yes

Phillip Island is the second most tourism-dependent region in all of Australia. People come to see the little penguins and the migrating Humpback and Southern Right whales as well as other incredible marine and wetland wildlife. The industrialisation of Westernport Bay in the form of huge gas tankers and a Floating Storage and Regasification Unit will undermine the beauty of the area and be inconsistent with the perception that it is a pristine and protected wetland. This could impact Phillip Island as a popular tourist destination.

• No

While I do not think this will impact tourism and recreation significantly it will still undermine decades-long efforts to regenerate Westernport Bay. Westernport Bay has been considered an industrial area in the past but that perception has been steadily shifting. More and more people now regard the Bay as a site of high ecological and recreational importance. The gas import terminal proposal would be a step backwards for this perception and may derail efforts to protect the further enhance the area for the environment and for recreational users.

6. What do you think is the most important reason to protect our wetlands and coastal ecosystems?

• Wetlands are among the most biodiverse ecosystems on earth.

Wetlands are among the most biodiverse ecosystems on earth. They combine land and water which allows them to be home to at least 1350 species including migratory birds like the critically endangered Orange-Bellied Parrot. Half of the Westernport Bay wetland is made up of seagrass beds which are a nursery site for prawns and fish. Westernport Bay is also the most significant site for mangroves in Victoria. Mangroves stabilise sediment and protect the shoreline from erosion. The shoreline directly around the Crib Point jetty is an extensive mangrove stand. Wetlands should be protected as a key habitat for an incredible array of plants and animals rather than being subject to potentially damaging projects like this gas import terminal proposed by AGL.


If the project is approved AGL could dump up to 468 million litres of chlorinated water into the Bay each day which could have a disastrous impact on marine wildlife. There is so much we do not know about how this cold chlorinated wastewater will affect marine life in Westernport. The impact modelling completed by AGL is not comprehensive and in some cases totally inappropriate. Furthermore, current Victorian laws prohibit the discharge of wastewater in high conservation value areas like Westernport Bay - clause 22 of the State Environment Protection Policy (Waters). AGL has so far been unsuccessful in their attempts to weaken these laws. Combining the poor impact assessments and the fact that the plan currently does not meet the legal requirements this proposal should not continue.

• Wetlands are crucial to our defence against the climate crisis.

Recent research has shown that wetlands have the potential to capture and store large amounts of carbon for hundreds of years. Wetlands should be protected and enhanced for their role in the fight against climate change rather than being subject to potentially damaging projects like this gas import terminal proposed by AGL. In Victoria we have already bulldozed or drained most of our freshwater wetlands which has contributed to the loss of approximately 35 per cent of wetlands worldwide between 1970-2015. We cannot afford to lose any more as we face the climate crisis.


• Australia has committed to promote the conservation and wise use of wetlands as a signatory of the Ramsar Convention on Wetlands of International Importance.

Australia has committed to promote the conservation and wise use of wetlands as a signatory of the Ramsar Convention on Wetlands of International Importance. This is understood as the maintenance of their ecological character and preventing their degradation. It is inappropriate to build and operate a gas import terminal in the middle of one of the most precious environments in Victoria and an internationally significant wetland.


7. We are facing a climate crisis. Which of these arguments do you think is the most powerful against AGL’s proposed gas import terminal?

• To avert the worst impacts of climate change we cannot afford any new fossil fuel projects in Victoria.

Millions of Australians consider climate change not to be a threat in the distant future but a dangerous reality we face right now. We are on track for several degrees Celsius of warming by the end of the century if we do not curb our emissions from fossil fuels. The plummeting costs of renewables and energy storage has rendered fossil fuel projects not only a threat to our environment but also bad business. Corporations like AGL should be investing more in renewables and supporting consumers to move away from gas instead of investing in soon-to-be stranded assets. This proposal to build a gas import terminal is not consistent with what we need to do to create a safe climate.

• Imported gas can be as bad as coal for the planet.


Gas is more carbon polluting than coal if methane leakage throughout the whole gas supply chain is above 3.2 per cent. Recent studies have shown that we have previously underestimated how much methane is released to the atmosphere during gas production. It has been found that onshore gas fields in the United States have levels of leakage of 2-17 per cent. Despite these findings the Australian gas industry and federal government report far lower emission intensities for unconventional gas emissions based on default emissions factors rather than on reliable measurements. Gas is not a climate solution.

• Renewable energy sources and electrification will soon displace our need for gas.

The electricity generation sector will play a key role in the transition away from fossil fuels. Renewable energy has become the cheapest alternative for new power production. This holds true even when renewables are backed with 6 hours of storage to guarantee that renewable energy can be delivered when required according to the Australian Energy Market Operator and CSIRO. The fact that firmed renewables will displace gas is becoming increasingly accepted in the energy markets. This year AEMO adjusted its Victorian GPG annual consumption forecast for the 2014 to 2039 period. They now assume that gas consumption will be dramatically below what was previously thought due to a higher penetration of renewables than previously forecast.

• Wetlands lock in carbon and are one of our best defences against the impacts of climate change.

Wetlands contain a disproportionate amount of the soil carbon on our planet. Wetlands are responsible for storing between 20 and 30 per cent of global soil carbon despite occupying only around 5 and 8 per cent of the surface of the Earth. Protecting wetlands such as Westernport Bay Ramsar site should be a priority to prevent the release of vast quantities of carbon pollution to the atmosphere. This is particularly important as a defense against the impacts of climate change.

• Reducing gas demand across Victoria is a better alternative to AGL’s proposed gas import terminal in Westernport Bay.

The EES submitted by AGL grossly underestimates the potential for reducing our demand for gas in Victoria. Victoria could reduce its gas consumption by between 98 and 113 petajoules by 2030 through using existing technology and targeted economic support according to a recent report written by energy consultants Northmore Gordon. With the right government policies Victoria could meet its energy needs without new gas including new gas fields or gas import terminals like that proposed by AGL for Westernport Bay. These measures will lower energy costs for consumers and reduce emissions under most scenarios. This is the case even when a lot of our electricity is generated by fossil fuels but will become even cheaper and less polluting as more of our electricity is generated through renewables.

8. What do you think is the biggest risk AGL’s proposed project poses to marine wildlife?

• The 1-in-16 risk of vessels striking marine animals over the lifetime of the project.

Large ships like LNG tankers have been recorded as having hit whales and other marine mammals. The EES has grossly underreported the chance of whale strike at 1-in-2500 per year. Using their own figures the actual calculated risk is 1-in-326. This means a 1-in-16 chance over the proposed 20-year lifespan. It is likely that these numbers are conservative because the number of whales observed with injuries consistent with ship strike is higher than the number of strikes reported by shipping operators. The conclusion that a ship strike would have a low consequence to the visiting Southern Right whale population is inconsistent with the Conservation Management Plan for Southern Right whales.

• The impact of noise pollution on marine wildlife including dolphins, whales and seals.

It is concerning to see the lack of credible assessments on how noise would affect marine wildlife. AGL acknowledge in their EES that there have been no baseline studies of the noise in Westernport Bay. They have also not tested the impact of noise in Westernport Bay itself nor the noise produced by a berthed FSRU. Even with these inadequate studies the EES states that underwater sound would elicit behavioural changes in dolphins and mask the communication of whales in the area. The noise


would also deter fish and other marine animals from foraging nearby which would affect the important ecosystem around Crib Point.

• Chlorine impacting marine wildlife.

Small marine organisms which make up the foundations of the ecosystem - like plankton and fish eggs - would be the most impacted by this proposal. Locally they would be unable to escape being pulled into the ship intake and being subjected to chlorine levels far above safe levels. The impact is likely to be significant with nearly half a billion litres of water being drawn into the intakes each day. This enormous quantity of colder chlorinated water would be dumped back into the Bay and disperse with the current thereby further affecting marine wildlife.

Thank you once again for the opportunity to contribute to the environment assessment of the Crib Point gas import jetty and gas pipeline project. As outlined above, the impact on the local community would be unacceptable. There are many other viable, and more suitable, options Victoria can pursue to ensure that we meet our energy needs without exposing the precious wetlands of Westernport Bay, the unique wildlife which depend on this ecosystem, or the local community to any harm.

Sincerely,

XXX

Thank you once again for the opportunity to contribute to the environment assessment of the Crib Point gas import jetty and gas pipeline project. As outlined above, the impact on our internationally recognised wetlands and wildlife would be unacceptable. There are many other viable, and more suitable, options Victoria can pursue to ensure that we meet our energy needs without exposing the precious wetlands of Westernport Bay, the unique wildlife which depend on this ecosystem, or the local community to any harm.

Sincerely,

XXX

Thank you once again for the opportunity to contribute to the environment assessment of the Crib Point gas import jetty and gas pipeline project. As outlined above, the negative impact on greenhouse gas emissions in Victoria would be unacceptable. There are many other viable, and more suitable, options Victoria can pursue to ensure that we meet our energy needs without exposing the precious wetlands of Westernport Bay, the unique wildlife which depend on this ecosystem, or the local community to any harm.

Sincerely,

XXX

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