M37.14 Flood Risk:

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Comment

Minerals and Waste Local Plan: Pre-Submission Publication

Representation ID: 99187

Received: 04/11/2022

Respondent: King's Lynn Drainage Board

Representation Summary:

The sites allocated within the local plan listed below are not within any of the WMA member Boards’ Internal Drainage Districts (IDD) however several sites are within a Board’s Watershed Catchment (meaning water from the site will eventually enter the IDD). Maps are available on the Board’s webpages showing the Internal Drainage District well as the wider watershed catchments.
For any site with the potential to discharge water indirectly to a WMA Board catchment, we recommend that a drainage strategy is supplied which has been considered in line with the Planning Practice Guidance SuDS discharge location hierarchy. If a surface water discharge proposed to a watercourse within the watershed catchment of the Board’s IDD then we request that this be in line with the Non-Statutory technical standards for sustainable drainage systems (SuDS), specifically S2 and S4. Resultantly we recommend that the discharge from this site is attenuated to the Greenfield Runoff Rates wherever possible. We recommend that due consideration is given to ensuring that runoff from any allocated site is clear from silt and this is closely monitored to protect watercourses from pollution.
MIN37 Internal Drainage District Watershed catchment is Norfolk Rivers IDB