This site is in Washington, D.C. on the National Mall just south of the railroad bridge that runs beside Route 1 and I-395, approximately 2 miles northeast of the Pentagon. The site is comprised of 2 large temporary buildings, one of which has large exhaust fans on the roof. As of 2006, there were signs at the site for Kiewet, a prominent tunneling firm. According to a Washington Post article from November 26, 2004, the Navy controls the site and describes it as a “utility assessment and upgrade”. The article says that “theories abound about the four-acre complex, which is dead center in a ring that includes the White House, the U.S. Capitol, the Pentagon, Reagan National Airport and the National War College. Is it a sophisticated sensor station, guarding the 14th Street bridge and other Potomac River crossings? Is it an excavation point for underwater barriers to protect the Washington Channel and Potomac River from submarines? Is it a staging area for Navy Seabees securing underwater cables between the White House and the Pentagon, across the river?”