The causes of flooding in Treorchy during Storm Dennis two years ago have been revealed.
The latest section 19 report from Rhondda Cynon Taf Council released on Thursday, February 24 said that the main source of flooding was “significant overland run-off” being generated from the steep hillsides above Treorchy.
This drained to lower ground via a series of ordinary watercourses many of which became overwhelmed with water and debris and eventually overflowed, the report said.
