Expert Opinion CAPE OTWAY ROAD AUSTRALIA (‘CORA’) DEVELOPMENT ADVISORY COMMITTEE
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Expert Opinion CAPE OTWAY ROAD AUSTRALIA (‘CORA’) DEVELOPMENT ADVISORY COMMITTEE COESR Pty Ltd Panel Hearing: Amendment C125 to the Surf Coast Shire Planning Scheme January 2020 Report Author: Warwick Bishop Title: Final Report Address of Property: 1300 Cape Otway Road, Modewarre VIC 3240 Report Prepared For: COESR Pty Ltd Instructed By: Mark Naughton (Planning & Property Partners Pty Ltd) Panel Hearing: Amendment C125 to the Surf Coast Shire Planning Scheme Date of Report 22 January 2020 Document Name 20010145_R01_v02e_Expert Witness Report.docx 15 Business Park Drive Notting Hill VIC 3168 Telephone (03) 8526 0800 Fax (03) 9558 9365 ACN 093 377 283 ABN 60 093 377 283 20010145_R01_v02e_Expert Report.docxWitness COESR Pty Ltd | January 2020 CAPE OTWAY ROAD AUSTRALIA (‘CORA’) DEVELOPMENT ADVISORY COMMITTEE Page 2 CONTENTS 1 REPORT AUTHOR 6 2 REPORT CONTRIBUTORS 7 3 SCOPE OF REPORT 8 4 BASIS OF THIS REPORT 9 5 INTRODUCTION 10 6 BACKGROUND 11 6.1 Locality 11 6.2 Proposed Development 12 7 REVIEW OF FLOOD REPORT 14 7.1 Overview 14 7.2 Flooding from Lake Modewarre 14 7.2.1 Flood Modelling Approach 14 7.2.2 Worst-case Scenario 15 7.3 Flooding from the Waterway 16 7.4 Impact of Proposed Development 17 7.4.1 Overview 17 7.4.2 Objective 1 – Flood Safety 17 7.4.3 Objective 2 – Flood Damage 18 7.4.4 Objective 3 - Flood Impact 18 7.4.5 Objective 4 - Waterway and Floodplain Protection 21 8 REVIEW OF INTEGRATED WATER MANAGEMENT PLAN 22 8.1 Overview 22 8.2 Water Sensitive Urban Design Strategy 22 8.3 Impact on Downstream Environment 23 Retarding Basins 25 8.4 8.5 Comprehensive Development Plan Requirements and Guidelines 26 9 ADDITIONAL INVESTIGATIONS 28 9.1 Water Balance Analysis 28 10 DIRECTIONS 31 10.1 Cape Otway Road Australia Development Advisory Committee Stage 1 Report 31 10.2 Cape Otway Road Australia Development Advisory Committee - Directions – 17 Dec 2019 32 11 SUBMISSIONS 34 11.1 Surf Coast Shire Council Submission 35 11.2 Corangamite CMA 36 20010145_R01_v02e_Expert Report.docxWitness COESR Pty Ltd | January 2020 CAPE OTWAY ROAD AUSTRALIA (‘CORA’) DEVELOPMENT ADVISORY COMMITTEE Page 3 11.3 DELWP 37 12 CONCLUSIONS AND RECOMMENDATIONS 39 12.1 Conclusions 39 12.1.1 Flooding 39 12.1.2 Integrated Water Management 39 12.2 Recommendations 39 13 DECLARATION 40 20010145_R01_v02e_Expert Report.docxWitness COESR Pty Ltd | January 2020 CAPE OTWAY ROAD AUSTRALIA (‘CORA’) DEVELOPMENT ADVISORY COMMITTEE Page 4 LIST OF FIGURES Figure 6-1 Subject Site and Modewarre Catchments (source: Water Technology, 2019) 12 Figure 6-2 Site Plan (source: Tract, September 2019) 13 Figure 7-1 Worst-case Flood Scenario 16 Figure 7-2 Flood Impacts from CORA Development (Flood Depths), Dec 2019 layout. 19 Figure 7-3 Flood Impacts from CORA Development (Flood Velocities), Dec 2019 layout 20 Figure 9-1 Existing and Post-development Wetland Depth Frequency Curve 29 Figure 9-2 Existing and Post-development Wetland Depth Frequency Curve – by Season 30 Figure 11-1 Berm Re-location (source: Ecology & Heritage Partners) 38 LIST OF TABLES Table 7-1 Flood Safety Hazard Risk 17 Table 8-1 Water Quality Modelling Pre- and Post-Development (inc. external catchments) 24 Table 8-2 CDP Requirements and Guidlines 26 Table 11-1 Summary of Matters Raised in Submissions 34 20010145_R01_v02e_Expert Report.docxWitness COESR Pty Ltd | January 2020 CAPE OTWAY ROAD AUSTRALIA (‘CORA’) DEVELOPMENT ADVISORY COMMITTEE Page 5 1 REPORT AUTHOR Warwick Alistair Bishop Senior Principal Engineer, Director Water Technology Pty Ltd 15 Business Park Drive Notting Hill, VIC 3168 Qualifications: ◼ B.E. (Hons), University of Melbourne, 1993 ◼ MEngSci, Monash University, 2000 Affiliations: ◼ Fellow, Institution of Engineers Australia, Chartered Professional Engineer. ◼ Member, River Basin Management Society ◼ Member, Engineers Australia, Victorian Water Engineering Branch Committee ◼ Member, Society for Sustainability and Environmental Engineering of Engineers Australia ◼ Member, Stormwater Victoria ◼ Member, Australian Water Association ◼ Member, International Association for Hydraulic Research Area of Expertise Key areas of expertise relevant to this report are summarised below. ◼ Assessment of drainage and flood related issues; ◼ Expert witness for drainage and flood related issues at environmental effects panels, planning panels and civil hearings. Statement of Expertise With my qualifications and experience, I believe that I am well qualified to provide an expert opinion on drainage and flood matters for the Cape Otway Road Australia (‘CORA’) development. 20010145_R01_v02e_Expert Report.docxWitness COESR Pty Ltd | January 2020 CAPE OTWAY ROAD AUSTRALIA (‘CORA’) DEVELOPMENT ADVISORY COMMITTEE Page 6 2 REPORT CONTRIBUTORS Bertrand Salmi Senior Engineer Water Technology Pty Ltd 15 Business Park Drive Notting Hill, VIC 3168 Qualifications: ◼ Bachelor (Hons) of Ecological Sciences (Environmental Sciences), University of Edinburgh 2006 ◼ Master of Sciences, Water Resource Engineering Management, Heriot Watt University 2007 Area of Expertise: Key areas of expertise relevant to this report are summarised below. ◼ Assessment of flood and stormwater management; ◼ Application of GIS. Scope of contribution: Bertrand assisted in the preparation of the report, including data review and figure preparation, under my supervision. 20010145_R01_v02e_Expert Report.docxWitness COESR Pty Ltd | January 2020 CAPE OTWAY ROAD AUSTRALIA (‘CORA’) DEVELOPMENT ADVISORY COMMITTEE Page 7 3 SCOPE OF REPORT In relation to the Amendment C125 to the Surf Coast Shire Planning Scheme, I have been engaged to act as an independent expert on drainage and flooding issues relevant to the elite sport training, tourism and accommodation development in Modewarre, Victoria, known as the Cape Otway Road Australia (‘CORA’) development. I have been asked to review the material provided to me and prepare an expert witness statement in respect to the CORA development proposal and C125 planning scheme amendment, which: ◼ considers my own opinions, within the limits of my expertise, with respect to the appropriateness of the proposal in relation to all relevant integrated water management considerations; ◼ explains the relevant flood risk in respect to the site and surrounds; ◼ considers the appropriateness of the proposal in respect to proposed flood mitigation measures; and ◼ provides a response to any submissions received from other parties arising from public exhibition. I understand that the proposal in relation to groundwater management has been considered as part of the expert witness statement prepared by Mr Andrew Telfer. 20010145_R01_v02e_Expert Report.docxWitness COESR Pty Ltd | January 2020 CAPE OTWAY ROAD AUSTRALIA (‘CORA’) DEVELOPMENT ADVISORY COMMITTEE Page 8 4 BASIS OF THIS REPORT This report is based on: ◼ Review of Amendment C125 to the Surf Coast Shire Planning Scheme supporting information and technical reports, including: ◼ Development Advisory Committee Stage 1 Report (17 April 2019) ◼ Cape Otway Road Australia Comprehensive Development Plan (17 September 2019) ◼ Flood Report (Water Technology, September 2019) ◼ Integrated Water Management Plan (Water Technology, September 2019) ◼ Land Capability Assessment for Sustainable Irrigation of Recycled Water (Out Task Environmental, August 2018) ◼ Biodiversity Assessment (Ecology & Heritage Partners, September 2019) ◼ Cora Precinct Plan, Concept Masterplan and Landscape Masterplan, Tract, 18 Dec 2019 ◼ Review of any additional publicly available information, including: ◼ LiDAR (survey) and VicMap information; ◼ Submissions received in respect to the proposed CORA development and Amendment C125 to the Surf Coast Shire Planning Scheme; ◼ Relevant guidelines and standards, including: ◼ DELWP’s Guidelines for Development in Flood Affected Areas (2019); ◼ Infrastructure Design Manual; ◼ State Rivers and Water Supply Commission Memorandum, Drainage of Lake Modewarre into Thompson’s Creek, 16 September 1977 This report has been prepared in accordance with the relevant procedures and practice notes applied by Planning Panels Victoria on Expert Evidence. I have read the “Guide to Expert Evidence” and am aware of my overriding duty to assist the Panel on matters relevant to my expertise. I have had no direct input to the development of the proposal or the supporting documents submitted as part of the amendment. Following early discussions with the planning consultant (Tract), prior to Water Technology’s engagement to undertake investigations, my role was Project Director. This is a supporting role (as required) to the Project Manager and did not involve any technical input or review. This role typically becomes active when there are technical or client issues that need my assistance. In this instance there were no such concerns and I remained at “arms length” from the project. Similarly, my colleague Bertrand Salmi had no involvement in the development of the technical reports. We have therefore undertaken a peer review of the previous Water Technology reports, independent of the previous work, and undertaken further analysis to inform my response to instructions. 20010145_R01_v02e_Expert Report.docxWitness COESR Pty Ltd | January 2020 CAPE OTWAY ROAD AUSTRALIA (‘CORA’) DEVELOPMENT ADVISORY COMMITTEE Page 9 5 INTRODUCTION I have been instructed by Planning & Property Partners on behalf of COESR Pty Ltd to provide expert evidence at the upcoming Panel Hearing in relation to relevant drainage and flooding matters associated with the elite sport, training, tourism and accommodation development in