On the 17th January the DIG met with Thames Water consultants eight2O and Bucks CC for us to receive an update on the TW Drainage Strategy for Little Marlow and Hughenden Valley. The strategy document initially issued last year deals with responses to sewer flooding, surface water flooding and groundwater flooding to properties.
The meeting heard that work continues to be done on the development and refinement of the plan. This includes:- Survey and data collection from depth monitors, groundwater and river level data to enable better understanding of trigger levels when external water can enter the sewer network.- Sewer Flooding Questionnaires have been collected from properties affected by flooding in the valley and the data entered to the TW Sewer Flooding History Database.- CCTV footage of the sewers has been reviewed and repair work actions passed to TW Ops staff.- Further development work on the hydrological modelling of the valley has taken place.
Future actions include further surveying, monitoring and modelling, which will lead to continued improvement to the strategy.
TW and Bucks CC will arrange a further meeting for May to discuss modelling, where HVDIG has had some concerns. Bucks CC will ask the Atkins consultants involved in the DEFRA project to attend this meeting.