Regular flooding through manhole cover, railway line path between Midmoor Road and Elm Grove
Sent to Merton Council 2 days, 3 hours, 3 minutes later. Council ref: SRQ-1262618-R8H6G7.
Moderated by Merton Council at 17:39, Thursday 6 November 2025
Whenever there is heavy rain the line path floods, particularly through the manhole cover pictured (you can see water bubbling through at the top).
Thames Water have investigated and concluded:
the flooding was caused by a hydraulic overload. This occurs when the sewer system becomes overwhelmed by the volume of water, typically during periods of heavy rainfall or when the system is unable to cope with sudden surges, causing water to back up and potentially flood nearby areas. During the visit, our team cleared a blockage in the system. However, we were unable to determine who was responsible for the blockage. To gain further clarity, we carried out a camera survey of the sewer network. The results confirmed the affected section is under the responsibility of the local authority, as there are no properties connected to the sewer at that point.
Updates
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Thank you for reporting a blocked drain or gully.
If we can clear the blockage using a tanker with a suction hose, we will do this within 5 working days of your report.
If more complex work is needed such as digging out compacted silt or repairing collapsed drains, it may take longer.
If we cannot get access because of parked cars, we will return within 10 working days.Did you know…?
We manage and maintain 17,900 road gullies across the borough. All high-risk gullies in areas known to have flooding issues are cleaned at least once a year and all other gullies are cleaned bi-annually.
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