Lower Don Valley Flood Alleviation Scheme (Sheffield)
Lower Don Valley, Sheffield, UK (8km along the River Don from Nursery Street to Blackburn Brook near Meadowhall) · Completed in 2017 (in response to floods in 2000 and 2007) · £21 million (2017 prices, including £1.4m from private sector contributions)
The judgement call
Account-gated at launchThe scheme was a direct response to devastating floods in 2000 and 2007, with the 2007 event being the worst since 1864. - It was pioneering as the first scheme in the UK to incorporate private sector contributions from a Business Improvement District. - The project delivered physical and environmental enhancements, including improved public safety and better access to the river as a public amenity. - Emphasized long-term maintenance and management, including river channel maintenance by the social enterprise River Stewardship Company.
Key engineering challenges
Protecting a vital economic area with numerous businesses and jobs from significant flooding. - Designing and implementing flood defences along an 8km stretch of the River Don within an urban and industrial landscape. - Integrating flood defence infrastructure while allowing for future adaptation to climate change impacts.
Project facts
- Client / owner
- Sheffield City Council, Environment Agency, supported by Sheffield Chamber of Commerce and Industry
- Lead contractor
- CPC Civils (mentioned in image credit for construction)
- Lead designers
- —
- Project type
- new build | upgrade
- Scale
- Improved defences at over 50 locations along an 8km stretch of the River Don; reduced flood risk for over 500 businesses; includes flood defence walls, flood gates, river maintenance, and a fish pass at Sanderson’s Weir.
- Disciplines
- civil; hydraulic; environmental
- Standards & frameworks
- Adherence to UK flood defence standards; designed to lower annual flood risk from 1:25 to a minimum of 1:100.
Sources: "Lower Don Valley Flood Alleviation Scheme", Connected by Water, https://connectedbywater.co.uk/casestudies/lower-don-valley-flood-alleviation-scheme/ - "Flood protection schemes", Sheffield City Council, https://www.sheffield.gov.uk/public-health/flood-protection-schemes - "Sheffield Lower Don Valley Flood Defence", Climatefit-heu.eu, https://climatefit-heu.eu/wp-content/uploads/2024/07/11_Sheffield-Lower-Don-Valley.pdf