15. Chesham flood alleviation project - Pednormead End

Aims: Improve wildlife corridors; Manage flow; Work together

Water body: River Chess
Project description

Project to reduce the risk to residential properties from fluvial and surface water flooding in the Pednormead End area of Chesham.

 Based on historic records of flooding, site investigation and detailed modelling, Buckinghamshire County Council's Surface Water Management Plan (SWMP) for Chesham identified a severe risk of frequent flooding to several properties at Pednormead End, near the junctions of Missenden Road, Pednor Road, Church Street and Wey Lane. Flooding is likely to be due to a combination of surface water runoff from Missenden and Pednor Roads and flows in the River Chess exceeding the capacity of the culvert under Missenden Road. Both of these sources are likely to be exacerbated during high groundwater levels.

In addition to the properties which flooded in 2014 being offered Individual Property Protection through the government’s repair and renew grant, a successful Partnership Funding bid in 2014  enabled a feasibility study into a community scheme to improve flood risk management to be carried out. The study identified the following preferred measures:


As par tof this project a scheme to reconnect channel and floodplain and create additional flood storage upstream of the Missenden Road culvert through weir removal, channel narrowing & wetland creation. This project was completed in February 2018 by Bucks CC and The Chilterns Chalk Streams Project.

Further phases of work include increasing the capacity of the river culvert under the Missenden Road, to improve conveyance and reduce flood risk to properties upstream; and property level flood protection measures


Project lead: Buckinghamshire County Council
Project partners: Chilterns Chalk Streams Project, Environment Agency, River Chess Association, Transport for Bucks, Chesham Flood Action Group, Chiltern Society
Contact for more information: This email address is being protected from spambots. You need JavaScript enabled to view it.
Project start: 1st November 2014
Project end: 31st March 2018
Funding source: Defra Flood Defence Grant in Aid , Buckinghamshire County Council

Design by LTD Design Consultants and build by Garganey Consulting. From an original concept by the Herts and Middlesex Wildlife Trust.