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Waveney District Council Water Cycle Study

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Waveney District Council Water Cycle Study Waveney District Council Water Cycle Study Waveney District Council FINAL – June 2017 Waveney District Council Water Cycle Study Waveney District Council Project Reference: 60518518 Quality information Prepared by Checked by Approved by Hannah Booth Carl Pelling Sarah Kelly Graduate Water Consultant Associate Director Regional Director Revision History Revision Revision date Details Authorized Name Position Initial Draft – V1 March 2017 For comment Carl Pelling Associate Director Final June 2017 Final Sarah Kelly Regional Director Prepared for: Waveney District Council Prepared by: AECOM Infrastructure & Environment UK Limited Midpoint Alencon Link Basingstoke Hampshire RG21 7PP UK T: +44(0)1256 310200 aecom.com Prepared for: Waveney District Council AECOM Waveney District Council Water Cycle Study Waveney District Council Project Reference: 60518518 Limitations AECOM Infrastructure & Environment UK Limited (“AECOM”) has prepared this Report for the sole use of Waveney District Council (“Client”) in accordance with the Agreement under which our services were performed (“final part C Waveney WCS_Final”). No other warranty, expressed or implied, is made as to the professional advice included in this Report or any other services provided by AECOM. The conclusions and recommendations contained in this Report are based upon information provided by others and upon the assumption that all relevant information has been provided by those parties from whom it has been requested and that such information is accurate. Information obtained by AECOM has not been independently verified by AECOM, unless otherwise stated in the Report. The methodology adopted and the sources of information used by AECOM in providing its services are outlined in this Report. The work described in this Report was undertaken between September 2016 and June 2017 and is based on the conditions encountered and the information available during the said period of time. The scope of this Report and the services are accordingly factually limited by these circumstances. Where assessments of works or costs identified in this Report are made, such assessments are based upon the information available at the time and where appropriate are subject to further investigations or information which may become available. AECOM disclaim any undertaking or obligation to advise any person of any change in any matter affecting the Report, which may come or be brought to AECOM’s attention after the date of the Report. Certain statements made in the Report that are not historical facts may constitute estimates, projections or other forward-looking statements and even though they are based on reasonable assumptions as of the date of the Report, such forward-looking statements by their nature involve risks and uncertainties that could cause actual results to differ materially from the results predicted. AECOM specifically does not guarantee or warrant any estimate or projections contained in this Report. Copyright © 2017 AECOM Infrastructure & Environment UK Limited. All Rights Reserved. Prepared for: Waveney District Council AECOM Waveney District Council Water Cycle Study Waveney District Council Project Reference: 60518518 Table of Contents List of Acronyms ...................................................................................................................................................... 1 Non-Technical Summary ......................................................................................................................................... 2 Wastewater Strategy .................................................................................................................................... 2 Water Supply Strategy ................................................................................................................................. 3 Overall Impact of Development .................................................................................................................... 3 1. Introduction .................................................................................................................................................. 4 1.1 Background ...................................................................................................................................... 4 1.2 WCS History ..................................................................................................................................... 4 1.3 Study Governance ............................................................................................................................ 4 1.4 WCS Scope ...................................................................................................................................... 4 1.5 Key Assumptions and Conditions ..................................................................................................... 5 1.6 Report Structure ............................................................................................................................... 6 2. Study Drivers ............................................................................................................................................... 8 2.1 OFWAT Price Review ....................................................................................................................... 8 2.2 Water Framework Directive .............................................................................................................. 9 3. Proposed Growth ....................................................................................................................................... 10 3.1 Preferred Growth Strategy .............................................................................................................. 10 3.2 Housing .......................................................................................................................................... 10 3.3 Employment .................................................................................................................................... 12 4. Wastewater Treatment Strategy ................................................................................................................. 13 4.1 Wastewater in the District ............................................................................................................... 13 4.2 Management of WRC Discharges .................................................................................................. 14 4.3 Wastewater Treatment Assessment Overview ................................................................................ 16 4.4 WRC Headroom Assessment ......................................................................................................... 18 4.5 Water Quality Assessment .............................................................................................................. 20 4.6 Ecological Appraisal........................................................................................................................ 28 4.7 Wastewater Summary .................................................................................................................... 36 5. Water Supply Strategy ............................................................................................................................... 38 5.1 Introduction ..................................................................................................................................... 38 5.2 Abstraction Licensing Strategies .................................................................................................... 38 5.3 Water Resource Planning ............................................................................................................... 40 5.4 Water Resource Planning in the District ......................................................................................... 40 5.5 Water Efficiency Plan ...................................................................................................................... 41 5.6 Water Neutrality .............................................................................................................................. 42 6. Major Development Site Assessment ........................................................................................................ 51 6.1 Introduction ..................................................................................................................................... 51 6.2 Site Assessment Methodologies ..................................................................................................... 51 7. Water Cycle Strategy Recommendations and Policy ................................................................................. 54 7.1 Recommendations for Policy Development .................................................................................... 54 7.2 Further Recommendations ............................................................................................................. 55 Appendix A Policy and Legislative Drivers Shaping the WCS ............................................................................... 56 Appendix B Relevant Planning Documents to the WCS ....................................................................................... 58 Appendix C WRC Capacity Assessment results ................................................................................................... 59 C.1 Modelling assumptions
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