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Guidance

Guidance to help you complete your application and comply with the conditions of your environmental permit are included under the relevant sections

If you are going to undertake a flood risk activity you may need to apply for an environmental permit to undertake that activity.

What is a flood risk activity?

A flood risk activity includes:

  • Erecting any structure (whether temporary or permanent) in, over or under a main river
  • The carrying out of any work of alteration or repair on any structure (whether temporary or permanent) in, over or under a main river if the work is likely to affect the flow of water in the main river or to impact on any drainage work
  • Erecting or altering any structure (whether temporary or permanent) designed to contain or divert the floodwaters of any part of a main river
  • Any dredging, raising or taking of any sand, silt, ballast, clay, gravel or other materials from or off the bed or banks of a main river (or causing such materials to be dredged, raised or taken), including hydrodynamic dredging and desilting
  • Any activity which is likely to divert the direction of the flow of water into or out of a main river or alter the level of water in a main river
  • Any activity within 8 metres of a non-tidal main river (or within 8 metres of any flood defence structure or culvert on that river) or any activity within 16 metres of a tidal main river (or within 16 metres of any flood defence structure or culvert on that river) which is likely to:
    • cause damage to or endanger the stability of the banks of that river or of any culvert;
    • cause damage to any river control works;
    • alter, reconstruct, discontinue or remove any river control works;
    • divert or obstruct flood waters or impact on the drainage of that river; or
    • interfere with Natural Resources Wales’ access to and along that river
  • Any activity (other than an allowed activity (see below for definition)) on a flood plain that is:
    • more than 8 metres from a non-tidal main river or more than 16 metres from a tidal main river; or
    • more than 8 metres from any flood defence structure or culvert on a non-tidal main river or more than 16 metres from any flood defence structure or culvert on a tidal main river, which is likely to divert or obstruct floodwaters, to damage any river control works or to impact on drainage
  • Any activity within 16 metres of the base of a sea defence which is likely to:
    • endanger the stability of, cause damage to or reduce the effectiveness of that sea defence; or
    • interfere with Natural Resources Wales’ access to and along that sea defence
  • Any activity within 8 metres of the base of a remote defence which is likely to
    • endanger the stability of, cause damage to or reduce the effectiveness of that defence, or
    • interfere with Natural Resources Wales’ access to and along that defence
  • Any quarrying or excavation within 16 metres of the base of a remote defence which is likely to cause damage to or endanger the stability of that defence
  • Any quarrying or excavation within 16 metres of a main river or any flood defence structure or culvert on that river which is likely to cause damage to or endanger the stability of the banks of that river

Regulatory guidance

Regulatory guidance notes on policy and legal interpretation issues associated with implementing the Environmental Permitting Regulations can be found on our Regulatory Guidance Notes (RGN's) pages.

Charges

There is an application charge to cover our costs of determining your permit. The charges are set out in the NRW Fees and Charges document available on the NRW website. There is no charge for registering a flood risk activity exemption, or for varying or surrendering a permit, although this may be introduced in the future.

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