Comment

Representation ID: 2140

Received: 14/07/2021

Respondent: Norfolk County Council - LLFA

SN3019
See attachment for full comments

Significant mitigation required for severe constraints. Recommend a review of the site and potential removal from the local plan.
"1.] At risk of surface water flooding?: Yes
* 3.33% AEP Event [Extent]: Minor flooding
* 3.33% AEP Event [Depth]: 0.00 - 0.30cm.
* 1.0% AEP Event [Extent]: Minor flooding|Moderate flooding
* 1.0% AEP Event [Depth]: 0.00 - 0.30cm.
* 0.1% AEP Event [Extent]: Major flooding
* 0.1% AEP Event [Depth]: 0.00 - 0.60cm.
2.] Internal & external flooding?:
* On-site: No
* Within proximity to site (~500.00m): No
3.] Watercourses [Online ordinary watercourses or mains rivers]?:
* On-site: Yes|Ordinary Watercourse
* Within proximity to site (~100.00m): Yes|Ordinary Watercourse
4.] Surface water sewer systems?:
* On-site: No
* Within proximity to site (~100.00m): No
5.] Source Protection Zone?: No
6.] Internal Drainage Board?: No IDB referenced
7.] The site predominantly has superficial deposits of DIAMICTON. Comments on infiltration potential are dependent on a complete geotechnical investigation, including BRE365 Soakaway Testing. Where possible, surface water infiltration should be utilised." "Site reference in GIS differs from site reference provided in excel document (SN3019SL vs SN3019). From the description provided, we have concluded these are the same site and have reviewed accordingly. If this is not the case, please disregard the comments provided by the LLFA and reconsult with updated data.

The on-site flood risk is a major flow path in the 0.1% AEP event. It affects the majority of the site. Flow lines indicate this flood water flows south off of the site. We advise this must be considered in the site assessment.

Access to the site appears to be heavily affected by the on-site flood risk.

A small area of the site is unaffected by flood risk (west). We would advise that inclusion of this site in the plan is reassessed."

Assessment: Red