Construction on Rhode Island Avenue


DC Water’s contractor has begun preparations for jet grouting work at the intersection of First Street and Rhode Island Avenue NW. This is a continuation of work associated with the Northeast Boundary Tunnel Project. The contractor will install jet grout columns on the north side of the intersection at First Street and Rhode Island Avenue, NW. It will employ jet grouting, a method of ground improvement that involves injecting cement and water into the soil at very high pressures to solidify and strengthen the ground. The improved ground will allow safe excavation in the stabilized ground to connect the existing First Street Tunnel with the new Northeast Boundary Tunnel. Work will continue for approximately eight months. The Northeast Boundary Tunnel is the largest component of the Clean Rivers Project. Beginning south of RFK Stadium, it will extend north to Rhode Island Avenue NE and west to Sixth Street NW. When complete, the approximately five-mile long tunnel will significantly reduce chronic flooding, as well as reduce the amount of combined sewer overflows into the Anacostia River by 98 percent. For more information, visit