It's one of the four tunnels for DC Water's Clean Rivers Project aimed at reducing the pollution of its rivers. The Anacostia tunnel was designed with an inside diameter of 23ft (7m), and excavated by an EPBM.
The tunnel runs south from a site near RFK Stadium to the Poplar Point Pumping Station. Its alignment is approximately 100ft (30m) below the surface and runs underneath the Anacostia River, CSX railroad tracks, the new Interstate 695, and the WMATA Green Line.
Salini Impregilo said the tunnel's completion date is December 13, 2017, and the JV will complete the project by constructing six shafts of varying sizes, four diversion structures, and three connecting adits of varying length.
