Mill Hill Circus Drainage

MQT on 2012-09-19
Session date: 
September 19, 2012
Question By: 
Andrew Dismore
Labour Group
Asked Of: 
The Mayor


When will the drainage round Mill Hill Circus on the A41 be fixed, to stop flooding?


Answer for Mill Hill Circus Drainage

Answer for Mill Hill Circus Drainage

Answered By: 
The Mayor

TfL has been working closely with Thames Water to identify and remedy the flooding problem at Mill Hill Circus. TfL has installed additional gullies in an attempt to improve surface water drainage, but the underlying problem is with the capacity of the Thames Water surface water sewer. This results in gullies surcharging water back onto the A41 during heavy rainfall and on occasions to the Mill Hill brook overflowing.

TfL has accompanied Thames Water during investigations to identify the cause of the capacity constraint but so far no issues such as blockages have been identified.

Further remedial measures by TfL will simply transfer the problem, and TfL believe the only means of ameliorating the problem is for Thames Water to take steps to improve capacity. TfL will continue to press Thames Water to take action.