- £9 Million
Thetford Road, Watton
Proposed residential development consisting of 110 new properties and associated parking. The existing geology in the area meant infiltration devices could be used for the Northern part of the development although the existing ground water levels in the Southern section meant the Environment Agency buffer requirements to base of soakaways could not be achieved and a more traditional drainage network was designed to convey the surface water runoff to the existing ditch network.
The new surface water drainage network adopted by Anglian Water used a flow control chamber to restrict flows from site with the existing ditch features on site modified to provide the necessary attention for a 1 in 100 year storm event plus 30% climatic change.
- Permeable paving used on all private hardstanding
- Highway crate soakaways located within public open space areas adopted by Norfolk County Council
- Private crate soakaways used on Northern part of site to drain roofs only.
- Existing ditch features on Southern part of site modified to provide very economic attenuation to comply with Anglian Water news letter February 2014 option 1