McKissack & McKissack is providing project management and design services for the Anacostia River wastewater projects, part of the $2.2 billion Clean Rivers Project to capture and clean wastewater in the sewer overflow tunnel system.
The new District of Columbia combined sewer overflow tunnel system reduces water pollution by storing up to 75 million gallons of wastewater underground until there is hydraulic capacity to treat it at the Blue Plains Advanced Wastewater Treatment Plant, the largest wastewater treatment plant of its kind. Three major tunnel projects will merge to form the system. DC Water launched this initiative in 2004 to limit the number of overflows from the combined sewer system during heavy rainstorms into the Anacostia and Potomac Rivers as well as Rock Creek Park. The preliminary design-build documents cover 15 sections that comprise the 15.5-mile alignment. The project team consists of multiple companies providing expertise to this massive undertaking. McKissack is providing a lead program management role; acting as lead designer; and providing construction management, project administration, hydraulic evaluation, permitting acquisition, geotechnical assistance, green infrastructure, scheduling and other affiliate tasks associated with the combined sewer overflow discharges to the area waterways.