Monday 4 April 2016
Essex County Council as Lead Local Flood Authority has been a statutory consultee in relation to surface water drainage for major developments since 15th April 2015.
Major developments are defined as development involving:
- the winning and working of minerals
- waste development
- 10 or more dwellings or where not specified, a site area of 0.5ha
- Providion of a building where floor space is 1,000 square metres or more
- Development carried out on a site over 1ha.
In undertaking the role, the LLFA checks:
- Flood risk to the site, including how any runoff onto the site is proposed to be managed and that the drainage system is designed to cope with a design rainfall event
- Flood risk from the site, including restricting the rate and volume of runoff to replicate the greenfield situation and checking proposed discharge locations
- That priority is given to the use of SuDS as required by the Ministerial Statement made on 18th December 2014 (http://www.parliament.uk/documents/commons-vote-office/December%202014/18%20December/6.%20DCLG-sustainable-drainage-systems.pdf).
Up to the 14th April 2016, taking a whole year’s data, we received 759 consultations relating to approximately 500 planning applications. These can be broadly split into the below categories:
Applications are checked for compliance with our policy set out in the ECC SuDS Design Guide available at www.essex.gov.uk/flooding. We also have a pre-application process which has proved successful where subsequent planning applications are received. The Environment Agency remain the statutory consultee for sites in Flood Zones 2 & 3, in areas of contaminated land and which may impact on Groundwater Source Protection Zones.