It is available for Higher Tier and Woodland Creation grants but only:
in catchments targeted for flood risk measures
for dams, in streams between 1 metre (m) and 2.99m
where approved by the Environment Agency or Lead Local Flood Authority
How this item will benefit the environment
Leaky woody dams slow the movement of water and help push flows onto the floodplain during floods. This increases temporary storage of flood waters within water channels and out on to the floodplain, helping delay the passage of flood water downstream, allowing sediment to settle out, and reduce downstream flood risk.
Advice and suggestions for how to carry out this item
The following advice is helpful, but they are not requirements for this item.
Detailed design can vary and the siting of leaky woody dams in natural water courses will be dictated by local circumstances and availability of or easy access to import suitable materials to site. Higher Tier manual Annex 2c has details of indicative design of dams.
Check the dams for silt
You will need to check the dam regularly and de-silt it to prevent it collecting large amounts of silt.