Application for Discharge of Drainage Condition

We have recently been engaged to discharge drainage conditions in Wiltshire. The planning approval contains 2no. drainage related conditions that we are applying to remove at the same time.

What does the condition look like?

“No development shall commence on site until a drainage strategy has been submitted
to and approved in writing by the local planning authority. The drainage strategy shall
include, as a minimum, the following information:
– Calculations and drawings for the drainage system design showing designated holding areas and conveyance routes based on no flooding on site for a 1 in 30 year rainfall event.
– Calculations and drawings for the drainage system design showing designated holding areas and conveyance routes based on no flooding on site for a 1 in 100 year plus climate change rainfall event in respect to a building (including basement) or utility plant susceptible to water within the development;
– Calculations which demonstrate that the required 20% betterment against greenfield rates has been achieved for all storm events between the 1 in 1 year and the 1 in 100year return period storm events.
– A clearly labelled drainage layout plan showing the pipe networks and any attenuation ponds. The plan should show any pipe node numbers referred to within the drainage calculations.
– A plan showing the cross sections and design of any attenuation pond and its components”

What is our response to that?

Our response to this will include a custom written report that sets out the requirements step by step, using plans and calculations.

How we can help.

If you need a planning condition related to drainage discharged then please do contact us. We provide a free of charge 15 minute consultation to help understand your requirements. Our reports are kept as simple as possible, and are typically well received.