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Telford & Wrekin Council Scoping Water Cycle Study Final Report Hyder Consulting (UK) Limited 2212959 5th Floor The Pithay All Saints Street Bristol BS1 2NL United Kingdom Tel: +44 (0)117 372 1200 Fax: +44 (0)117 37 www.hyderconsulting.com Telford & Wrekin Council Scoping Water Cycle Study Final Report Author Heather Taylor Checker Liam Foster / Aimee Hart Approver Heather Taylor Report No 1 Date 5th September 2012 This report has been prepared for Telford & Wrekin Council in accordance with the terms and conditions of appointment for Final Report dated 3rd March 2012. 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. Scoping Water Cycle Study—Final Report Hyder Consulting (UK) Limited-2212959 k:\uaprojects\ua004156 telford & wrekin\i- issued\5001-ua004156-telford wrekin scoping wcs-r-bm-final issue september 2012.docx CONTENTS 1 Executive Summary .............................................................................. 1 2 Introduction ........................................................................................... 3 2.1 Background to Study ............................................................................ 3 2.2 What is a Water Cycle Study (WCS)? .................................................. 4 2.3 Study area ............................................................................................ 6 2.4 The Water Cycle ................................................................................... 9 2.5 Current funding ................................................................................... 10 3 Policy context ..................................................................................... 12 3.1 National policy .................................................................................... 12 3.2 Regional Policy ................................................................................... 14 3.3 Local policy ......................................................................................... 15 4 Methodology ....................................................................................... 16 4.1 Assessment of existing situation ......................................................... 16 4.2 Assessment of impact from development ........................................... 16 4.3 Limitations .......................................................................................... 17 5 Development Options ......................................................................... 19 5.1 Residential development .................................................................... 19 5.2 Employment area development .......................................................... 22 6 Wastewater collection, treatment and water quality ........................... 24 6.1 Existing situation ................................................................................. 24 6.2 Environmental capacity....................................................................... 26 6.3 Proposed Growth Considerations ....................................................... 32 6.4 Summary and Issues for next stages ................................................. 38 7 Water resources and supply ............................................................... 40 7.1 Water resources policy and practice ................................................... 40 7.2 Water company water resource management planning ..................... 48 7.3 Current infrastructure .......................................................................... 50 7.4 Development impacts ......................................................................... 50 7.5 Assessment of water supply infrastructure capacity ........................... 55 7.6 Summary and Issues for next stage ................................................... 56 8 Flood risk management ...................................................................... 58 8.1 Existing situation ................................................................................. 58 8.2 Strategic objectives ............................................................................ 60 8.3 Development Flood Risk potential ...................................................... 65 Scoping Water Cycle Study—Final Report Hyder Consulting (UK) Limited-2212959 Page i k:\uaprojects\ua004156 telford & wrekin\i- issued\5001-ua004156-telford wrekin scoping wcs-r-bm-final issue september 2012.docx 8.4 Surface Water Management ............................................................... 66 8.5 Summary and Issues for the Next Stage ............................................ 71 9 Constraints, Solutions and Opportunities Summary .......................... 74 10 Conclusions ........................................................................................ 80 10.1 The need for a Outline WCS ............................................................... 81 10.2 Guidance for TWC and developers .................................................... 84 Appendices Appendix A WwTW boundaries Appendix B Severn Trent Water Information Scoping Water Cycle Study—Final Report Hyder Consulting (UK) Limited-2212959 Page ii k:\uaprojects\ua004156 telford & wrekin\i- issued\5001-ua004156-telford wrekin scoping wcs-r-bm-final issue september 2012.docx 1 Executive Summary 1.1 Water Cycle Study 1 Hyder was commissioned by Telford and Wrekin Council to undertake a Water Cycle Study (WCS) Scoping Report for the Council area. This Scoping Report was undertaken to: Gather the relevant planning information from the Local Planning Authority (LPA) – Telford & Wrekin Council to help define the study area based on likely discharge points and abstraction sources Undertake a review of the existing work and studies undertaken to date, as well as existing plans to define key issues Confirm the development scenarios and planning data with all stakeholders Define the programme for further works needed to assess the Water Cycle, as noted in the Environment Agency’s WCS Guidance and identify the data sources Identify the objectives of the WCS and which plans and strategies it will be used to inform and draw from Identify if further work is needed to inform strategic planning decisions and agree a project scope and project plan for further work if needed 2 Water Cycle Studies are not a statutory requirement. However, the Environment Agency strongly recommend a Water Cycle Study as being the most effective method of ensuring that development and growth is sustainable with respect to the water environment and water infrastructure. A Water Cycle Study does not replace a local authority’s statutory requirements, such as responsibilities under the Flood Risk Regulation 2009 or the 2010 Flood and Water Management Act. The three growth scenarios of housing target set for Telford and Wrekin Council (TWC) are required to be appraised within this Water Cycle Study. A Water Cycle Study is required to ensure that the water supply, wastewater collection and wastewater treatment infrastructure in the TWC area can accommodate the required growth levels, whilst minimising flood risk and impact on the water environment. Three Growth Scenarios options have been tested in this WCS: Option 1: Completion Led targets of 10,400 based on 85% growth concentration in Telford, 10% in Newport and 5% in rural areas. Option 2: Housing Growth Led targets of 15,560 based on 85% growth concentration in Telford, 10% in Newport and 5% in rural areas; Option 3: Regional Spatial Strategy Led of 26,500 Growth based on 85% growth concentration in Telford, 10% in Newport and 5% in rural areas 3 At this time, TWC are unable to provide Employment Growth Trajectories. However, the impact of these employment areas on the water environment will be in keeping with the impacts from the residential sites and will require mitigation accordingly. It is recommended this is explored when future work is undertaken as part of an Outline WCS Study. 4 As this WCS has looked at a range of development options, TWC will be required to undertake additional work prior to submitting their Shaping Places Local Plan, once they have finalised their Preferred Option, to ensure that the final development option decided upon has a robust evidence base. Scoping Water Cycle Study—Final Report Hyder Consulting (UK) Limited-2212959 Page 1 k:\uaprojects\ua004156 telford & wrekin\i- issued\5001-ua004156-telford wrekin scoping wcs-r-bm-final issue september 2012.docx 5 TWC will be unable to make an informed decision on their Shaping Places Local Plan Preferred Option until the developers promoting the potential new settlement locations have liaised with the water companies and the EA, and provided sufficient detail of the wastewater treatment/ sewerage solutions that they intend to utilise on site. 6 This Scoping Report was unable to draw firm conclusions about water resource environmental capacity due to the ongoing derivation of future water company plans that determine water resource strategy (Water Resource Management Plans or WRMP). It is important that the Water Cycle Study does not pre-empt or repeat the WRMP. Therefore, further assessment is recommended to incorporate the emerging findings of the PR14 WRMP documentation. 7 Additionally, it is recommended that the Water and Sewerage Company, Severn Trent Water Limited, STWL, liaise further with TWC to identify and incorporate the likely demands identified during this study from the three scenarios