Both the Upper and Lower Medway IDB’s are regulatory authorities and therefore its consent will be required for certain activities.

Firstly, both IDB’s have Byelaws which help secure the efficient working of the drainage system within their Districts. These Byelaws set out what you can and can’t do adjacent to IDB adopted watercourses within the drainage district without the Board permission.

Click here more information on the Boards’ byelaws 

Secondly under Section 23 of the Land Drainage Act 1991 consent may also be required for works on ordinary watercourses, still within the drainage district, for things like erection of structures, obstructions, culverts or where the flow is affected.

If at all in doubt please contact the Boards offices on 01622 758345 or email