Land drainage consent
All works (including temporary works) that obstruct water flow within the channel of an ordinary watercourse require consent. This could be a new pipe (culvert), bridge, dam, pond or any other structure in the watercourse, a diversion or a change to the alignment or the banks of the watercourse.
A land drainage application form and further guidance is available from West Sussex County Council, the Lead Local Flood Authority.
Please note that works affecting ordinary watercourses may also require consent under our Land Drainage byelaws.
For works on or near a Main River, an Internal Drainage District watercourse or flood defence, you will need consent (in the form of a Flood Risk Activity Permit) from the Environment Agency.