Local List Glossary

Critical Drainage Area Surface Water Management Report

When is this required?

All development within a Critical Drainage Area (CDA) that will result in an increase or change to how surface water is dealt with on the site. CDAs are defined in:

Barnstaple (east)
Barnstaple (south west)
Bideford /Northam(south)
East the Water, Bideford
Fremington Yelland
Holsworthy
Ilfracombe and Hele

What information is required?

The report should demonstrate how surface water runoff will be addressed in accordance with the minimum drainage standards required by the Environment Agency, which (at July 2019) provides that all off site surface water discharges from development should mimic "Greenfield" performance up to a maximum 1 in 10 year discharge and that on-site all surface water should be safely managed up to the "1 in 100+climate change (plus 40%) conditions. If successor standards are issued by the Environment Agency, they will supersede the current standards.

Relevant policy and reason for the document:

North Devon and Torridge Local Plan 2011-2031: http://consult.torridge.gov.uk/portal/planning/localplan/adoption/

North Devon and Torridge Local Plan Policy ST03: Adapting to Climate Change and Strengthening Resilience

North Devon and Torridge Local Plan Policy DM04: Design Principles.

Further information sources:

Devon County Council - flood risk management: https://www.devon.gov.uk/floodriskmanagement/planning-and-development/