Comment

Representation ID: 2084

Received: 14/07/2021

Respondent: Norfolk County Council - LLFA

See attachments for full response.
Mitigation required for heavy constraints. Significant information required at a planning stage.
"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
* 1.0% AEP Event [Depth]: 0.00 - 0.30cm.
* 0.1% AEP Event [Extent]: Moderate flooding
* 0.1% AEP Event [Depth]: 0.00- 0.30cm.
2.] Internal & external flooding?:
* On-site: No
* Within proximity to site (~500.00m): No
3.] Watercourses [Online ordinary watercourses or mains rivers]?:
* On-site: No
* Within proximity to site (~100.00m): No
4.] Surface water sewer systems?:
* On-site: No
* Within proximity to site (~100.00m): No
5.] Source Protection Zone?: Source Protection Zone 2
6.] Internal Drainage Board?: Geldeston 1
7.] The site predominantly has superficial deposits of SAND AND GRAVEL. Comments on infiltration potential are dependent on a complete geotechnical investigation, including BRE365 Soakaway Testing. Where possible, surface water infiltration should be utilised." "The eastern side of the site partially intersects the Geldeston 1 IDB.

Part of the on-site flood risk forms a moderate flow path in the 0.1% AEP event, dissecting the site west-south in the west, southwest and centre of the site. Flow lines indicate this flood water flows south off of the site, contributing to a larger flow path south of the site. The on-site flow path forms a curve shape. We advise this must be considered in the site assessment.
A large area of the site is unaffected by flood risk and has the potential to be developed."
Assessment: Amber