The San Francisco Public Utilities Commission has awarded a $939 million contract for the refurbishment of biosolid digester facilities at the city’s Southeast Water Pollution Control Plant. MWH Constructors, a leading international construction company operating in the water and wastewater industry, and joint venture partner Webcor Builders have been awarded the contract.

The Southeast Water Pollution Control Plant was built in 1952 and is San Francisco Public Utilities Commission’s largest wastewater treatment facility, treating around 80 percent of San Francisco’s wastewater. The Biosolids Digester Facilities Project aims to replace existing digester facilities with new and improved facilities, as well as improve energy recovery and maximize control of odors.

Construction is expected to commence in summer 2018 with the facility becoming fully operational in summer 2025. The project will be carried out in two phases to allow for continued use of the facilities. Phase one includes demolition and site preparation of the eastern portion of the SEP and existing asphalt plant, and construction of new facilities on the site. Phase two involves demolition of the Central Shops and western portion of the SEP, with final completion of the new Biosolids Digester Facility following.


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