High Quality Content by WIKIPEDIA articles! The Aqueduct Bridge (also called the Alexandria Aqueduct) was a bridge between Georgetown, Washington, D.C., and Rosslyn, Virginia, in Arlington County. It was built to transport cargo-carrying boats on the Chesapeake and Ohio Canal in Georgetown across the Potomac River to the Alexandria Canal. The same eight piers supported three different bridges: a wooden canal bridge, a wooden double-deck canal and roadway bridge, and a roadway-only iron truss bridge. The bridge was closed in 1923 after the construction of the nearby Key Bridge.