Costain has been awarded a design and build contract as part of efforts to upgrade two wastewater treatment sites in Sandhurst in Berkshire and Selborne in Hampshire.
The awards, valued at more than £5 million for both sites, will see the contractor support Thames Water’s Wastewater Asset Assurance Programme (WAAP).
The schemes are the first to have been awarded to Costain as part of a wider £1.12 billion investment in sewage treatment sites.
The contractor said up to 25 similar projects could be allocated to it under efforts to upgrade the infrastructure.
Construction will involve new flow monitoring technology for wastewater before it is discharged; upgrading existing screening operations at the inlet station; improving storage tank capacity; and revising the storm return pumping systems.
The work aims to improve the ability of both sites to treat increasing volumes of incoming sewage, reducing untreated discharges in bad weather.
The news follows Costain’s appointment by Northumbrian Water to its AMP8 strategic infrastructure framework that could see contracts worth £670 million awarded to the contractor over a 12-year period.
The Sandhurst and Selborne schemes are due to complete in 2025.
Gerard Shore, water director at Costain, said: “Thames Water is investing in river health and has a clear plan to upgrade hundreds of treatment plants across the region.
“This will have a transformative impact on the lives of residents and local communities.
“We know we can add considerable value by identifying further opportunities at the outline design stage to maximise efficiencies for the upgraded treatment infrastructure.
“This will help ensure that these assets are fit for purpose for the long term.”
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