Construction was completed successfully, thanks to a collaborative effort between the Owner (DC Water), Owner’s Engineers (McMillan Jacobs Associates, Greeley and Hansen), and Design-Builder (Skanska, Jay-Dee, WSP). Currently operational, the project will feed into a larger sewer system serving Washington, DC once the Northeast Boundary Tunnel (NEBT) is completed in 2022.
The use of a centralized freeze plant to construct support of excavations for shafts, adits, and adit to tunnel junctions was a first. A utility trench was constructed along a back alley to provide brine supply to the three satellite sites.
This was one of the first uses of steel fiber reinforced precast tunnel liners on the East Coast of the United States of America.