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South West Water Limited Strategic Environmental Assessment of Water Resources Plan 2009 Environmental Report

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South West Water Limited Strategic Environmental Assessment of Water Resources Plan 2009 Environmental Report South West Water Limited Strategic Environmental Assessment of Water Resources Plan 2009 Environmental Report Hyder Consulting (UK) Limited 2212959 5th Floor The Pithay All Saints Street Bristol BS1 2NL United Kingdom Tel: +44 (0)870 000 3003 Fax: +44 (0)870 000 3903 www.hyderconsulting.com South West Water Limited Strategic Environmental Assessment of Water Resources Plan 2009 Environmental Report Author Gemma Blackler Checker Nicola Hartley Approver David Hourd Report No DV53405/ER3 Date 16/03/2009 This report has been prepared for South West Water Limited in accordance with the terms and conditions of appointment for Environmental Report dated March 2009. Hyder Consulting (UK) Limited (2212959) cannot accept any responsibility for any use of or reliance on the contents of this report by any third party. Strategic Environmental Assessment of Water Resources Plan 2009—Environmental Report Hyder Consulting (UK) Limited-2212959 Strategic Environmental Assessment of Water Resources Plan 2009—Environmental Report Hyder Consulting (UK) Limited-2212959 CONTENTS Abbreviations ...................................................................................................ii 1 Introduction........................................................................................... 1 1.1 The South West Water Water Resources Plan..................................... 1 1.2 Strategic Environmental Assessment ................................................... 2 1.3 Habitats Regulations Assessment Screening....................................... 4 1.4 Consultation Provisions ........................................................................ 5 2 Water Resources Plan.......................................................................... 6 2.1 Development of WRP ........................................................................... 6 3 Methodology ......................................................................................... 8 3.1 Development of SEA Framework ......................................................... 8 3.2 Limitations of the Study ........................................................................ 9 4 SEA Objectives, Environmental Baseline and Context ...................... 11 4.1 Approach to Characterising Baseline, Issues and Context................. 11 4.2 Environmental Baseline...................................................................... 12 4.3 Links to other relevant Policies, Plans and Programmes.................... 15 4.4 Environmental Problems and Opportunities ....................................... 16 4.5 SEA Objectives................................................................................... 16 5 Water Resource Plan Options............................................................ 19 5.1 Water Resource Plan Objective.......................................................... 19 5.2 Consideration of Alternatives.............................................................. 19 5.3 Unconstrained List of Options............................................................. 19 5.4 Unfeasible Options ............................................................................. 22 5.5 Feasible Options................................................................................. 24 5.6 Preferred Options ............................................................................... 27 6 Assessment of Water Resources Plan............................................... 29 6.1 Assessment of Water Resources Plan Objective ............................... 29 6.2 Assessment of the Feasible Options .................................................. 29 6.3 Preferred Options ............................................................................... 34 6.4 Compatibility of Other Plans and Programmes................................... 39 6.5 New North Plymouth WTW................................................................. 39 6.6 Mitigation of Significant Effects........................................................... 39 7 Proposed Monitoring Framework ....................................................... 44 7.1 Approach ............................................................................................ 44 7.2 Proposed Monitoring Framework........................................................ 44 8 Conclusions ........................................................................................ 47 Figure B1 – Distribution of World Heritage Sites across Cornwall and Strategic Environmental Assessment of Water Resources Plan 2009—Environmental Report Hyder Consulting (UK) Limited-2212959 Page i Devon ................................................................................................. 81 Figure B2 – Distribution of SSSIs across Cornwall and Devon...................... 82 Figure B3 – Distribution of SACs across Cornwall and Devon....................... 83 Figure B4 – Distribution of SPAs across Cornwall and Devon....................... 84 Figure B5 – Distribution of Ramsar Sites across Cornwall and Devon .......... 85 Figure B6– Distribution of National Parks across Cornwall and Devon ......... 86 Figure B7 – Distribution of Heritage Coast across Devon and Cornwall........ 87 Figure B8 – Distribution of AONBs across Cornwall and Devon.................... 88 Figure B9 – Distribution of Biosphere Reserves across Cornwall and Devon 89 Figure B10 – Distribution of Environmentally Sensitive Areas across Cornwall and Devon ........................................................................... 90 Figure B11 – Agricultural Land Designations across Cornwall and Devon .... 91 Figure B12 – Map of Flood Plains in Cornwall and Devon............................. 92 Figure B13 – Location of Major Aquifers in England and Wales.................... 93 Table B1 – Agricultural Land Classification Statistics .................................... 94 Figure B14 – Annual Leakage ....................................................................... 95 Figure B15 – South West Water Energy Consumption.................................. 96 Figure B16 – Unmeasured Household Water Consumption (litres/head/day) 97 Figure B17 – Non-Household Demand (Megalitres/day) ............................... 98 Figure B18 –Excavated Spoil reused/recycled by South West Water............ 99 Figure B19 – Cornwall Nature Map.............................................................. 100 Figure B20 – Devon Nature Map ................................................................. 101 Table B2 – BAP Priority Habitats and Species in Devon and Cornwall ....... 102 Appendices Appendix A Scoping Consultation Responses Appendix B Baseline Data Appendix C Review of Relevant Plans, Policies and Programmes Appendix D Completed SEA Matrices Appendix E Consultation Response Strategic Environmental Assessment of Water Resources Plan 2009—Environmental Report Hyder Consulting (UK) Limited-2212959 Page ii Abbreviations WRP Water Resources Plan BAP Biodiversity Action Plan cSAC Candidate Special Area of Conservation EBSD Economics of Balancing Supply and Demand HRA Habitats Regulations Assessment PPP Plans, Policies and Programmes pSPA Potential Special Protection Area SSA Strategic Supply Area SAC Special Area of Conservation SEA Strategic Environmental Assessment SPA Special Protection Area SSSI Site of Special Scientific Interest UKWIR UK Water Industry Research Ltd WTW Water Treatment Works WWTW Waste Water Treatment Works Strategic Environmental Assessment of Water Resources Plan 2009—Environmental Report Hyder Consulting (UK) Limited-2212959 Page ii 1 Introduction 1.1 The South West Water Water Resources Plan This Environmental Report has been produced to support the Water Resources Plan (WRP) that has been produced by South West Water following consultation upon the Draft WRP in May 2008 and the subsequent Second Draft WRP in January 2009. The Water Act 2003 amended the Water Industry Act 1991 to include a statutory requirement for water companies to prepare, maintain and publish a WRP. The purpose of the WRP is to demonstrate how South West Water intends to maintain the balance between supply and demand for water over the 25 year period up to 2034/2035. South West Water provides water to customers and operates and maintains water supply infrastructure across Cornwall and Devon (and very small parts of Dorset and Somerset). This area is divided into three Strategic Supply Areas (SSAs). These are shown in Figure 1.1. Figure 1.1 – South West Water Strategic Supply Areas The water resources planning process requires the completion of a variety of water resource forecast studies to establish the supply and demand balance in water supply within the South West Water SSAs. Where deficits are identified, potential water resource management options are prepared to achieve a balance between forecasted supply and demand. Figure 1.2 provides an overview of the statutory process from the Environment Agency Water Resources Planning Guideline document (2007) 1. 1 Water Resources Planning Guidelines , Environment Agency, 2007 Strategic Environmental Assessment of Water Resources Plan 2009—Environmental Report Hyder Consulting (UK) Limited-2212959 Page 1 Figure 1.2 – Statutory water resources plan process and timetable 1.2 Strategic Environmental Assessment Strategic Environmental Assessment (SEA) is a statutory assessment process required under the European Directive 2001/42/EC ‘on the assessment of the effects of certain plans and programmes on the environment’ (the SEA Directive). The SEA Directive
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