Division P- First Street Tunnel Project

L. S. Caldwell & Associates, Inc. (LSC) was responsible for the development, implementation, and monitoring of the Fair Share Objective initiatives for the District of Columbia Water and Sewer Authority’s (DC Water) Clean Rivers Project. This $2.6 billion program was the result of a Consent Decree signed by the District of Columbia, the Environmental Protection Agency, the Department of Justice. DC Water was required to clean up the Anacostia and Potomac Rivers by 2025. Seven discrete portions of the work, called Divisions, totaling approximately $819,368,566.00, Twelve Divisions are anticipated.

Division P

The First Street Tunnel project was identified as a medium term engineering recommendation in the Mayor’s Task Force Report on the Prevention of Flooding in Bloomingdale and LeDroit Park, and was a priority project because of recurring flooding in the Bloomingdale and LeDroit Park neighborhoods, particularly during the summer of 2012.

The First Street Trunk Sewer, a combined sewer, originated at the intersection of First and V Streets, NW and flowed south along First Street as a combined sewer until it connected with the North East Boundary Tunnel (NEBT) at Florida Avenue. The First Street Relief Sewer was a combined sewer that began at the Armed Forces Retirement Home, flowing south along First Street, NW, and terminating at First and V Streets, NW. At its termination point, the sewer discharged into the First Street Trunk Sewer.