Whittlesey Washes South Barrier Bank Strengthening Works

Strengthening of 16km of the South Barrier Bank of The Whittlesey Washes flood storage reservoir.

Left to right: Andy Palmer (ICE East of England Regional Chair), Chris Jones (Kier) and Paul Mitchelmore (Environment Agency).
Left to right: Andy Palmer (ICE East of England Regional Chair), Chris Jones (Kier) and Paul Mitchelmore (Environment Agency).
  • Updated: 09 December, 2016

Project facts

Project team:

  • Client/Project Manager: Environment Agency
  • Designer: Royal HaskoningDHV
  • Contractor: Interserve Construction Ltd / Team van Oord
  • Cost Consultant: Arcadis
  • Site Supervision: Mott MacDonald

Cost:

£17.5M (under budget)

Completed by:

29 April 2016

Website:

www.gov.uk/government/publications/whittlesey-washes
www.royalhaskoningdhv.com
www.northlevelidb.org/washes

 

What will the project deliver?

This project was to address safety concerns under the Reservoirs Act 1975. It delivered:

  • Strengthening of 16km of the South Barrier Bank (the dam), placing 300,000 tonnes of material on the landward side
  • A 250m long concrete wave wall
  • Completion within a limited timescale and ahead of schedule
  • No disturbance to overwintering and ground nesting birds by working only in the summer months
  • Low impact on residents during the works
  • Finished work blends into the landscape

Local impact

This project provides improved flood defence for the area. It protects homes, roads, railways and farmland in the Fenland area to the southeast of Peterborough. The added benefit was the improvement to local footpaths.

The project also delivered wildlife habitat improvements such as an otter holt, reptile hibernacula and kingfisher banks.

Interesting facts

  • The reservoir covers an area of approximately 1,450 hectares
  • The equivalent of 14,000 Olympic-sized pools (25,000 cubic metres) of flood water can be temporarily stored on the Washes
  • The area includes a Special Protection Area, a Special Area of Conservation, a RAMSAR site and a Site of Special Specific Interest, homes to rare and at risk fish, plants and insects

More project pictures

Lower berm work, Phase 2 August 2015
Lower berm work, Phase 2 August 2015
Phase 1 August 2013
Phase 1 August 2013
Completed works, Phase 2 October 2015
Completed works, Phase 2 October 2015
 

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