Washington CSO Control Facility goes online
A major combined sewer facility providing optimization for wet weather storage, screening and control of floatables and solids went online in April of this year. In addition to providing treatment, the facility dramatically reduces the number of overflows at the Washington outfall, and reduces the volume of overflows by approximately 90 percent annually. Features of the project include an influent 12ft by 12ft box culvert 30 ft deep, rehabilitation of 1,000 LF of 108-inch sewer, a reinforced concrete structure/building approximately 150ft x 100ft in plan over 32 feet deep with an extensive micropile foundation system, a river bank submerged outfall and high flow surface discharge, 18 actuated large weir gates and all appurtenances. Constructed at a cost of approximately $17 million, it was operationally complete in time to meet the Consent Decree milestone.