Burnley Strategic Flood Risk Assessment Level 1: March 2017 Burnley Borough Council: Burnley Strategic Flood Risk Assessment: Level 1 2017 Contents 1. Introduction .......................................................................................................................4 2. Scope and Purpose of the Report ........................................................................................4 3. Level 1 Assessment .............................................................................................................4 Scope of the Assessment ..............................................................................................................4 Review of the SFRA .......................................................................................................................5 Policy Context................................................................................................................................5 Overview of Burnley Borough .......................................................................................................5 Social and Economic Context ........................................................................................................6 The Ribble Catchment ...................................................................................................................6 Landscape and Geology ................................................................................................................6 Green Infrastructure .....................................................................................................................7 4. Flood Risk from Main Rivers ................................................................................................8 Watercourses ................................................................................................................................8 Culverted Watercourses ...............................................................................................................8 Environment Agency Flood Zones .................................................................................................8 The Functional Floodplain .............................................................................................................9 5. Environment Agency Flood Risk Management Plans affecting Burnley ............................... 11 Ribble Catchment Flood Management Plan (RCFMP) (Full report January 2009, Summary Report December 2009 .......................................................................................................................... 11 Burnley, Nelson and Colne Draft Flood Risk Management Strategy (BNCFRMS) 2011 ............. 13 6. Flood Risk Management .................................................................................................... 16 EA Assets .................................................................................................................................... 16 Fulledge Flood Storage Scheme ................................................................................................. 17 Padiham Flood Risk Alleviation Scheme .................................................................................... 17 LLFA Assets ................................................................................................................................. 18 Water Company Assets .............................................................................................................. 18 Flood Warning Areas .................................................................................................................. 19 7. Local Flood Risk ................................................................................................................ 20 Lancashire and Blackpool Flood Risk Management Strategy .................................................... 20 Preliminary Flood Risk Assessment (PFRA) ................................................................................ 20 Surface Water Management Plans (SWMPs) and Ordinary Watercourse Studies .................... 20 Ordinary watercourses including culverted watercourses ........................................................ 21 Surface Water Flooding and Management ................................................................................ 21 Sewer Flooding ........................................................................................................................... 22 Critical Drainage Areas ............................................................................................................... 23 Groundwater flooding ................................................................................................................ 23 Reservoirs ................................................................................................................................... 23 Reservoir Flood Maps................................................................................................................. 24 Leeds & Liverpool Canal ............................................................................................................. 24 Sustainable Drainage Systems (SuDS) ........................................................................................ 25 8. Factors Affecting future Flood Risk .................................................................................... 26 Climate Change .......................................................................................................................... 26 Other factors: Urban Development, Land Use Change/Land Management, Geomorphology . 26 9. Flood Risk and the Local Plan ............................................................................................ 28 The Local Plan............................................................................................................................. 28 The Sequential Test .................................................................................................................... 28 The SHLAA and the Sequential Approach .................................................................................. 29 Level 1 Screening Assessment Methodology ............................................................................. 30 Burnley Strategic Flood Risk Assessment: Level 1 2017 10. Conclusions from Level 1 Assessment ................................................................................ 33 General Conclusions ................................................................................................................... 33 Screening Results Conclusions (See Table 8 above)................................................................... 34 Application of the Sequential Test ............................................................................................. 34 Outcome of the Sequential Test ................................................................................................ 36 Appendix 1: SFRA Level 1 Mapping ......................................................................................... 37 Appendix 2: SFRA Level 1: Development Sites Screening Assessment ................................... 38 Appendix 3: SFRA Level 1: Development Sites Screening Assessment Summary Report....... 39 Appendix 4: Principal Flood Risk Reaches in Burnley (Burnley Nelson and Colne Flood Risk Management Strategy 2011) ..................................................................................................... 40 Appendix 5: Flood Zones (Flood Risk and Coastal Change Planning Practice Guidance) ....... 41 Appendix 6: Flood Risk Vulnerability (Flood Risk and Coastal Change Planning Practice Guidance) ............................................................................................................................ 42 Appendix 7: Flood Risk Vulnerability and Flood Zone ‘compatibility’ (Flood Risk and Coastal Change Planning Practice Guidance) ......................................................................................... 44 Appendix 8: The Sequential Tests ........................................................................................... 45 Housing Sites: Assessments ....................................................................................................... 46 Employment and Town Centre Sites: Assessments ................................................................... 53 Appendix 9: Site specific Flood Risk Assessments (FRAs) ..................................................... 64 Appendix 10: References and information sources ................................................................ 65 Appendix 11: Planning Policy Context .................................................................................... 66 Appendix 12: Historical Flood Incidents in Burnley ............................................................... 71 Appendix 13: Roles, responsibilities and contacts of Risk Management Authorities for flooding in Burnley .......................................................................................................................... 75 Burnley Strategic Flood Risk Assessment: Level 1 2017 1. Introduction 1.1 The Council is required under the National Planning Policy Framework (NPPF) 2012 to produce a Strategic Flood Risk Assessment (SFRA). The purpose of the SFRA is to identify and assess flood risk from all sources taking into account the effects of climate change. This information is then