Development: Flood Risk and Drainage

Flood risk from all sources must be considered when any development is to be carried out and there are various ways in which flood risk is assessed in order to ascertain what the flooding constraints to a development site may be.

The Development and Flood Risk Supplementary Planning Document (SPD) (October 2010)

The Development and Floodrisk SPD was adopted by the Council in October 2010. The document sets out in detail how national and local planning policy in relation to flood risk will be applied in the planning process.

Strategic Flood Risk Assessment (SFRA) Level 1 (November 2015)

This Level 1 Strategic Flood Risk Assessment (SFRA) replaces the previous Level 1 assessment carried out in 2009. The purpose of this report is to update the previous SFRA using the latest flood risk information together with the most current flood risk and planning policy available from the National Planning Policy Framework and Planning Practice Guidance for Flood Risk and Coastal Change. The Council requires this update to inform and provide the evidence base for the new Local Plan. The Council has provided the latest information from the ‘call for sites’ stage to feed into the SFRA Level 1. An assessment of flood risk to all sites is provided to assist in the decision making process for sites to take forward as part of the Local Plan.

The aims and objectives of the SFRA are:

  • To form part of the evidence base and inform the Sustainability Appraisal (Incorporating the Strategic Environmental Assessment) for the council’s Local Plan.
  • To make recommendations on the suitability of proposed development sites based on flood risk for the Council's Local Plan.
  • To understand flood risk from all sources and to investigate and identify the extent and severity of flood risk throughout the borough. This assessment will enable the Council to steer development away from those areas where flood risk is considered greatest, ensuring that areas allocated for development can be developed in a safe, cost effective and sustainable manner.
  • To pay particular attention to surface water flood risk, using the Environment Agency's third generation updated Flood Map for Surface Water.
  • To enable the Council to meet its obligations under the National Planning Policy Framework.
  • To supplement current policy guidelines and to provide a straightforward risk based approach to development management in the area.
  • To provide a reference document to which all parties involved in development planning and flood risk can reliably turn to for initial advice and guidance.
  • To develop a report that forms the basis of an informed development management process that also provides guidance on the potential risk of flooding associated with future planning applications and the basis for site-specific Flood Risk Assessments where necessary.
  • To identify land required for current and future flood management that should be safeguarded as set out in the National Planning Policy Framework.

SFRA Level 1 (November 2015) documents:

The SFRA consists of a main report together with some appendices, including the SFRA maps showing sites overlaid with the latest, readily available, gathered flood risk information, and site assessment spreadsheets indicating the level of flood risk to each site following a strategic assessment of risk. The main report and appendices are available to download and view below. The maps are available to view via an interactive map.

SFRA Level 1 - Main Report
Download (3.29MB)

SFRA - Interactive Map (Appendix A) - This shows all the various data sets, along with the ‘call for sites’, shown and referred to in the SFRA main report and supporting spreadsheet. Please note, these data sets can only ever be ‘point-in-time’ as data and information on flood risk is continually evolving. The SFRA Level 1 was developed using the most up-to-date data and information available at the time of preparation. The SFRA has been future proofed as far as possible though the reader should always confirm with the source organisation that the latest information is being used when decisions concerning development and flood risk are being made.

SFRA Level 1 - Development Site Assessment Spreadsheet - (Appendix B)
Download (825KB)
SFRA Level 1 - Development Site Assessment Spreadsheet - Residual Risk - Appendix B1
Download (761KB)
SFRA Level 1 - Functional Flood Plain and SFRA Flood Zone Definition - Appendix C
Download (190KB)

SFRA Level 2 (Spring 2016)

Following publication of the Level 1 SFRA in November 2015, the Council commissioned JBA Consulting to prepare a Level 2 SFRA for the borough. However, there are significant limitations as to what further work can be undertaken to understand the residual flood risks to the borough in more detail until further hydraulic modelling is completed by the Environment Agency. The Environment Agency are updating several hydraulic river models in and around the Doncaster area as many of the existing models are considered out of date. These updates will be used to update the Environment Agency's Flood Risk Map for Planning and also the functional flood plain. One of the main outcomes of a full Level 2 SFRA should be to provide evidence that is needed for an assessment of feasibility (and contribute to viability assessment) of development sites as well as ensuring that the sites will be safe for their lifetime. As such, there is insufficient evidence available to produce an adoptable NPPF complaint Level 2 study for the time being. The Council acknowledges the current limitations and is committed to producing a Level 2 SFRA once the Environment Agency’s modelling updates are completed at the earliest opportunity.

In the meantime, the current SFRA Level 2 (March 2010) is still available to view and download below, but it should be noted that much of this study is now quite old and the study did not look at all of the borough of Doncaster in the first instance.

SFRA Level 2 (March 2010) documents:

Level 2 - SFRA Report
Download (430KB)
Level 2 - Map A1 - s2q100 (Mexborough)
Download (179KB)
Level 2 - Map A2 - s2q100 (Benley Rise)
Download (323KB)
Level 2 - Map A3 - s2q100 (Stainforth)
Download (229KB)
Level 2 - Map A4 - s2q100 (Moorends)
Download (136KB)
Level 2 - Map A5 - s2q100 (Carcroft Common)
Download (199KB)
Level 2 - Map B1 - s2q100 and Climate Change (Mexborough)
Download (176KB)
Level 2 - Map B2 - s2q100 and Climate Change (Bentley Rise)
Download (335KB)
Level 2 - Map B5 - s2q100 and Climate Change (Carcroft Common)
Download (210KB)
Level 2 - Map C1 - Surface Water Flooding (Mexborough)
Download (199KB)
Level 2 - Map C2 - Surface Water Flooding (Bentley Rise)
Download (421KB)
Level 2 - Map C3 - Surface Water Flooding (Stainforth)
Download (238KB)
Level 2 - Map C4 - Surface Water Flooding (Moorends)
Download (149KB)
Level 2 - Map C5 - Surface Water Flooding (Carcoft Common)
Download (179KB)
Level 2 - Map D1 - Old Modelled Flood Extent (100 Year) (Mexborough)
Download (346KB)
Level 2 - Map D5 - Old Modelled Flood Extent (100 Year) (Bentley Rise)
Download (262KB)
Level 2 - Map V1 - Breach (100 Year Flood) (Moorends)
Download (612KB)
Level 2 - Map W4 - Breach (100 Year Flood) (Bentley Rise)
Download (876KB)
Level 2 - Map X1 - Breach (100 Year Flood) (Stainforth)
Download (975KB)

Sustainable Urban Drainage Systems (SuDS)

New Planning Policy was introduced as from 6 April 2015, in relation to providing SuDS for new developments where appropriate.

Any Major development has to ensure that SuDS systems are in place for the management of surface water, unless demonstrated to be inappropriate. Also, Doncaster Council as Lead Local Flood Authority is now also a statutory consultee on planning applications for the management of surface water, as from the 15 April 2015.

To assist applicants, the following documentation has been produced:

SY Interim Local Guidance for SuDS
Download (1.53MB)
Guidance for Developers producing Drainage Strategies
Download (231KB)

Further information:

The flood data should be looked at alongside Environment Agency flood data.

Contact

For the latest information on potential sites see the Local Plan or contact the Local Plan team:

Last updated: 26 April 2018 07:22:39