bath and North East Somerset Local Development Framework Evidence Base

Last updated: 13th August 2014

This page gives access to the flood risk studies that form part of the LDF / RDP Evidence Base. Information on the status of the documents below, as well as on the other topic areas, can be accessed from there. 

Please read the important information regarding the LDF/RDP evidence base studies before accessing and reading the documents below

Contents

    1. Bath Compensatory Storage Study
    2. Flood Risk Management Study (FRMS) 
    3. Core Strategy Sequential and Exception Tests
    4. South West Regional Flood Risk Appraisal (2007)
  1. Specific Projects
    1. Bath Flood Risk Management Project


1.    Introduction

This page provides information on the latest flood risk information, including Environment Agency maps and local evidence for use in Plan-making and Development Management.

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2.    National Policy

The National Planning Policy Framework (NPPF) requires that local authorities should:

  • Support Local Plans with a Strategic Flood Risk Assessment and develop policies that manage flood risk from all sources i.e. including surface water
  • Use opportunities offered from new development to reduce the causes and impacts of flooding
  • On specific sites, require Developers to produce “site specific flood risk assessments” and ensure that development is appropriately flood resistant and resilient, and that residual risk can be safely managed including giving priority to sustainable drainage systems
  • Apply a sequential risk based approach to the location of development (i.e. Sequential and Exceptions tests) where either sites are allocated or development is permitted through Development Management
  • When planning for sustainable drainage systems biodiversity gains should be planned for, pollution should be minimised and green infrastructure should be planned for positively
  • The Flood Risk and Water Management Act 2010 establishes a Sustainable Drainage Systems Approval Body in the Council which must approve all drainage systems in new development/re-development. Although the legislation has not yet been enacted drainage will still need to be addressed through the Development Management process with advice from the lead local flood authority.

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3.    Local Policy

The B&NES Core Strategy sets the context for this more detailed policy, in particular flood risk management (CP5) and the green infrastructure policy (CP7).

In addition the following saved Local Plan policies apply: ES.5 Foul & Surface Water Drainage and ES.9 Pollution and Nuisance.

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4.    Strategic Flood Risk Assessment

In addition to referring to the SFRA, all developers and applicants should also use the most recent Environment Agency flood maps entitled “Flood Map for Planning (Rivers and Sea)”. This Environment Agency mapping is updated on a quarterly basis and therefore some areas of the SFRA may have been supersede by more up to date mapping since when the SFRA was published.

The Environment Agency’s website also has mapping showing the risk of flooding from surface water and reservoirs. The surface water mapping does not contain sufficient information for it to be used to determine flood risk to individual properties, but it does provide an indication of whether the area may be affected by surface water flooding and to what extent.

Applicants and developers should use these sources of information alongside the SFRA. The SFRA remains a key source of information on sources of flooding, including in determining whether a site falls within Flood Zone 3b (functional floodplain).

It is the applicants responsibility to ensure all drainage designs, strategies and Site-Specific Flood Risk Assessments are supported by the most accurate and up to date information on flood risk. 

Link to the Environment Agency maps (external website).

In addition, please note that the indicative flood plain layer on the Policies Map is also superseded by the above.

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4.1 District-wide SFRA, Level 1 (April 2008)

All reports are available to download below, please note that due to the file sizes and format, the associated maps for Level 1 are not currently available on the website.   The Level 1 SFRA including maps can be viewed in Council offices, on request.

    1. SFRA Level 1 for B&NES Executive Summary, Capita Symonds (0.6 MB)
    2. SFRA Level 1 for B&NES Technical Report - this outlines assumptions and processes used to prepare the flood risk information (0.9 MB)
    3. SFRA Level 1 for B&NES User guide - this contains procedures and protocols for using the technical information and also an assessment of flood risk at a number of allocated development sites (0.5 MB)
    4. SFRA Level 1 for B&NES User Guide - Appendix A (12.4 MB)
    5. SFRA Level 1 for B&NES Management Guide - this provides a summary of procedures and protocols for management and maintenance of the SFRA document and supporting data and models (0.3 MB)

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4.2 Settlement Specific SFRA, Level 2 (July 2009)

The Level 2 SFRA provides additional information by settlement, providing greater understanding of the factors contributing to flooding in the main settlements. This provides guidance for Plan-Making and Development Management.

The Level 2 SFRA is divided into three parts by settlements: Bath, Keynsham and Midsomer Norton & Radstock. The SFRA Report and key maps are available below:

4.2.1 SFRA Level 2 for Bath (July 2009)

    1. Report (PDF - 0.4 MB)
    2. Key Map - Map F Flood Zone (PDF - 3 MB)
    3. Key Map - Map FF Functional flood plain (PDF - 2 MB)
    4. Key Map - Map A2 Flood depth (PDF - 0.4 MB)
    5. Key Map - Map A3 Velocity (PDF - 1.35 MB)
    6. Key Map - Map C Climate change (PDF - 1.38 MB)
    7. Key Map - Map L Surface water flooding (PDF - 0.4 MB)

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4.2.2 SFRA Level 2 for Keynsham (May 2009)

    1. Report (PDF - 0.5 KB)
    2. Key Map - Map F Flood Zone (PDF - 1.9 MB)
    3. Key Map - Map FF Functional flood plain (PDF - 1.8 MB)
    4. Key Map - Map A2 Flood depth (PDF - 0.4 MB)
    5. Key Map - Map A3 Velocity (PDF - 0.3 MB)
    6. Key Map - Map C Climate change (PDF - 0.3 MB)
    7. Key Map - Map L Surface water flooding (PDF - 0.3 MB)

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4.2.3 SFRA Level 2 for Midsomer Norton and Radstock (July 2009)

    1. Report (PDF - 0.6 MB)
    2. Update, Capita Symonds, June 2011 (0.5 MB)
    3. Key Map - Map F Flood Zone (2.2 MB)
    4. Key Map - Map FF Functional flood plain (0.7 MB)
    5. Key Map - Map A2 Flood depth (0.7 MB)
    6. Key Map - Map A3 Velocity (0.7 MB)
    7. Key Map - Map C Climate change (0.7 MB)
    8. Key Map - Map L Surface water flooding (0.3 MB)

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5.    Sustainable Drainage Systems

Sustainable Drainage Systems are required in national planning policy.

Furthermore, the Flood and Water Management Act 2010 and the implementation of Schedule 3, requires that any construction works with drainage implications will require drainage approval from Drainage & Flooding Team. Although this Act is not yet enabled, it is essential that drainage is considered and designed at an early stage as part of a site allocation or planning application.

Draft local guidelines for Sustainable Drainage Systems will be available from November 2014 in the Placemaking Plan. In addition all allocated sites will incorporate site specific sustainable drainage and green infrastructure principles.

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6.    Other Local Evidence

6.1 Bath Compensatory Storage Study

    1. Bath Compensatory Storage Study Phase 1 - Final Report, November 2011 (2.5 MB)
    2. Bath Compensatory Storage Study Phase 1 - Appendix A, November 2011 (7 MB).
    3. Note on Reviewed Flood Storage Volume used as the basis for the WYG Bath Compensatory Storage Study Phase 1, November 2011 (3.0 MB)

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6.2 Flood Risk Management Study

    1. FRMS Scoping Study, May 2009 (0.5 MB)
    2. FRMS Report, June 2010.  Please note that this file is 6 MB
    3. FRMS Report Appendix A - Tender Brief (0.08 MB)
    4. FRMS Report Appendix B - Proposed Options (0.07 MB)
    5. FRMS Report Appendix C - Bath, June 2010 (1.1 MB)
    6. FRMS Report Appendix C - Keynsham, June 2010 (0.9 MB)
    7. FRMS Report Appendix C - Midsomer Norton, June 2010 (3.1 MB)
    8. FRMS Report Appendix D - Econonmic Appraisal (0.1 MB)
    9. FRMS Report Appendix E - High Level Appraisal Matrix (0.1 MB)
    10. FRMS Report Appendix F - Detailed Level Appraisal Matrix (0.2 MB)
    11. FRMS Report Appendix G - Traffic Light Matrix Table (0.1 MB)
    12. FRMS Report Appendix H - Flood Risk Management Options Table & Optioneering Sketch. Please note that this file is 9.8 MB
    13. FRMS Report Appendix I - Site Specific Reports. Please note that this file is 4.2 MB
    14. FRMS Appendix J - Option Cost Breakdown (0.1 MB)
    15. FRMS  Report Appendix K(a) - Photos of Typical SUDS Installations (0.6 MB)
    16. FRMS Report Appendix K(b) - SUDS Site Assessments & Indicative Costing (Bath). Please note that this file is 19.1 MB
    17. FRMS Appendix K(c) - SUDS Site Assessments & Indicative Costing - Keynsham (3.2 MB)
    18. FRMS Report Appendix K(d) - SUDS Site Assessments & Indicative Costing - Midsomer Norton (4.7 MB)
    19. FRMS Appendix K(e) - SUDS Site Assessments & Indicative Costing (Radstock).  Please note that this file is 5 MB
    20. FRMS Report Appendix L(a) - Development Site & Compensatory FDA Location Plans - Bath Figure B1 (0.8 MB)
    21. FRMS Report Appendix L(b) - Development Site & Compensatory FDA Location Plans - Kensington Meadows Figure CSA 1.  Please note that this file is 6.1 MB
    22. FRMS Report Appendix L(c) - Development Site & Compensatory FDA Location Plans - Keysham Figure K1 (0.5 MB)
    23. FRMS Report Appendix L(d) - Development Site & Compensatory FDA Location Plans - Midsomer Norton Figure MN1 (0.5 MB)
    24. FRMS Report Appendix L(e) - Development Site & Compensatory FDA Location Plans - Radstock Figure R1 (0.2 MB)
    25. FRMS Report Appendix M - Workshop Proceedings (0.1 MB)

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6.3 Core Strategy Sequential and Exceptions Tests

    1. Flood Risk and Sequential Test Update, March 2013.
    2. Sequential and Exceptions Tests, November 2010 (1.2 MB)
    3. Sequential and Exceptions Tests, November 2010 - Appendix B Part 1 (7.5 MB)
    4. Sequential and Exceptions Tests, November 2010 - Appendix B Part 2 (3.5 MB)

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6.4 South West Regional Flood Risk Appraisal (2007)

    1. South West Regional Flood Risk Appraisal, February 2007 (1.8 MB)

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7.    Specific Projects

7.1 Bath Flood Risk Management Project

    1. Bath Flood Risk Management Project - Letter of Compliance, Environment Agency, February 2013
    2. Bath Flood Risk Management Project - Technical Note

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