The Charles C. Glover Memorial Bridge or Massachusetts Avenue Bridge in Northwest Washington, D.C. conveys Massachusetts Avenue over Rock Creek and Rock Creek Park. Northwest (also written as NW or NW) is the northwestern quadrant of Washington D Washington DC ( formally the District of Columbia and commonly referred to as Washington, the District, or simply D Massachusetts Avenue, abbreviated Mass Ave, is a major diagonal transverse road in Washington D Rock Creek is a free-flowing Tributary of the Potomac River, which empties into the Atlantic Ocean via the Chesapeake Bay. Rock Creek Park is a large urban natural area with Public park facilities that bisects Washington D The concrete arch bridge was constructed in 1939 and has a length of 386. Concrete is a construction material composed of Cement (commonly Portland cement) as well as other cementitious materials such as Fly ash and Slag 2 feet. 
A geographic coordinate system enables every location on the Earth to be specified in three coordinates using mainly a spherical coordinate system.