Stratford-on-Avon DC, Warwickshire CC, North Warwickshire BC & Rugby BC Level 1 SFRA Report Final Report September 2013 UNITED KINGDOM & IRELAND Stratford-on-Avon DC, Warwickshire CC, North Warwickshire BC & Rugby BC Level 1 Strategic Flood Risk Assessment REVISION SCHEDULE Rev Date Details Prepared by Reviewed by Approved by 1 September Draft Level 1 SFRA Gemma Hoad Rob Sweet Jon Robinson 2013 Water Scientist Principal Flood Operations Director Risk Specialist Danielle Skilton Flood Risk Consultant 2 September Final Level 1 SFRA Danielle Skilton Carl Pelling Jon Robinson 2013 Flood Risk Principal Flood Operations Director Consultant and Water Consultant Gemma Hoad Water Scientist URS Infrastructure & Environment UK Limited Scott House Alencon Link Basingstoke Hants RG21 7PP Tel: +44 (0)1256 310200 Fax: +44 (0)1256 310201 www.ursglobal.com FINAL REPORT September 2013 i Stratford-on-Avon DC, Warwickshire CC, North Warwickshire BC & Rugby BC Level 1 Strategic Flood Risk Assessment Limitations URS Infrastructure & Environment UK Limited (“URS”) has prepared this Report for the sole use of Stratford-on-Avon District Council, Rugby Borough Council, North Warwickshire Borough Council and Warwickshire County Council (“Client”) in accordance with the Agreement under which our services were performed [3128526 dated 5 th July 2013]. No other warranty, expressed or implied, is made as to the professional advice included in this Report or any other services provided by URS. This Report is confidential and may not be disclosed by the Client nor relied upon by any other party without the prior and express written agreement of URS. 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 URS has not been independently verified by URS, unless otherwise stated in the Report. The methodology adopted and the sources of information used by URS in providing its services are outlined in this Report. The work described in this Report was undertaken between July 2013 and September 2013 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. URS 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 URS’ 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. URS specifically does not guarantee or warrant any estimate or projections contained in this Report. Copyright © This Report is the copyright of URS Infrastructure & Environment UK Limited. Any unauthorised reproduction or usage by any person other than the addressee is strictly prohibited. FINAL REPORT September 2013 ii Stratford-on-Avon DC, Warwickshire CC, North Warwickshire BC & Rugby BC Level 1 Strategic Flood Risk Assessment TABLE OF CONTENTS EXEC UTIVE SUMMARY ................................ ................................ .... VI ABBREVIATIONS .............................................................................. VII GLOSSARY ........................................................................................ IX 1 INTRODUCTION ............................................................... 1 1.1 Background ...................................................................... 1 1.2 Planning Context ............................................................. 1 1.3 Study Area ........................................................................ 1 1.4 Aims and Objectives of the SFRA Update..................... 4 2 POLICY CONTEXT ........................................................... 5 2.1 National Policy ................................................................. 5 2.2 Additional Guidance and Strategy Documents ............ 8 3 DATA COLLECTION AND REVIEW .............................. 11 3.1 Tasks ............................................................................... 11 3.2 Stakeholder Consultation ............................................. 11 3.3 Data/Information Requested ......................................... 12 4 LEVEL 1 SFRA DATA..................................................... 13 4.1 Requirements of National Planning Policy Framework13 4.2 Tidal Flooding ................................................................ 13 4.3 Fluvial Flooding ............................................................. 13 4.4 Surface Water Flooding................................................. 17 4.5 Groundwater Flooding .................................................. 18 4.6 Sewer Flooding .............................................................. 19 4.7 Artificial Sources – Canals and Reservoirs ................ 19 5 STRATFORD-ON-AVON DISTRICT COUNCIL ............. 21 5.1 Area Overview ................................................................ 21 5.2 Local Policy .................................................................... 21 5.3 Flood Risk ....................................................................... 22 6 NORTH WARWICKSHIRE BOROUGH COUNCIL ........ 28 6.1 Area Overview ................................................................ 28 6.2 Local Policy .................................................................... 28 6.3 Flood Risk ....................................................................... 28 7 RUGBY BOROUGH COUNCIL ....................................... 33 7.1 Area Overview ................................................................ 33 7.2 Local Policy .................................................................... 33 7.3 Flood Risk ....................................................................... 33 8 WARWICKSHIRE COUNTY COUNCIL .......................... 39 FINAL REPORT September 2013 iii Stratford-on-Avon DC, Warwickshire CC, North Warwickshire BC & Rugby BC Level 1 Strategic Flood Risk Assessment 8.1 Area Overview ................................................................ 39 8.2 Local Policy .................................................................... 40 8.3 Flood Risk ....................................................................... 42 8.4 Restoration of Minerals Sites ....................................... 47 9 NPPF SEQUENTIAL TEST GUIDANCE......................... 48 9.1 Overview ......................................................................... 48 9.2 Sequential Test .............................................................. 48 9.3 Recommended Stages for Application of the Sequential Test .................................................................................. 51 9.4 Exception Test ............................................................... 52 9.5 Site Specific FRA Guidance .......................................... 53 9.6 Waste and Minerals Sites .............................................. 54 10 EMERGENCY PLANNING AND FLOOD RISK MANAGEMENT ............................................................... 55 10.1 Flood Warning ................................................................ 55 10.2 Residual Risk ................................................................. 56 10.3 Emergency Planning ..................................................... 56 10.4 Potential Evacuation and Rescue Routes ................... 57 11 SUSTAINABLE DRAINAGE SYSTEMS ......................... 59 11.1 What are SuDS? ............................................................. 59 11.2 Why use SuDS? ............................................................. 60 11.3 SuDS Techniques .......................................................... 61 11.4 Where can SuDS be utilised? ....................................... 61 11.5 SuDS Approval Board ................................................... 62 12 POLICY AND PRACTICE ............................................... 63 12.1 Overview ......................................................................... 63 12.2 Flood Risk Recommendations ..................................... 64 12.3 Flood Mitigation Recommendations ............................ 64 12.4 SuDS Recommendations .............................................. 65 12.5 Water Environment Recommendations....................... 65 12.6 Development Management Recommendations .......... 66 13 DISCUSSION AND CONCLUSIONS .............................. 67 13.1 Overview ......................................................................... 67 13.2 How to maintain and update the SFRA........................ 67 APPENDIX A – FIGURES ................................................................... A APPENDIX B – GIS DATA REGISTER ............................................... B FINAL REPORT September 2013 iv Stratford-on-Avon DC, Warwickshire CC, North Warwickshire