The project The DC Clean Rivers Project Division A - Blue Plains Tunnel is one of several contracts that comprise the overall Long Term Control Plan (LTCP) of DC Water. It consists of a network of new tunnels, sewers, and diversion structures designed to capture overows to Rock Creek, and the Anacostia and Potomac rivers for treatment at the Blue Plains Advanced Waste Water Treatment Plant. The challenge DC Water is in the process of implementing its LTCP to meet requirements established by the US Environmental Protection Agency D.C. Clean Rivers Projectfor pollution control and reduction of combined sewer overows into nearby waterways. The solution Bencor was contracted to design and install four reinforced concrete slurry diaphragm wall shafts along the tunnel alignment. The slurry wal

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