Washington Aqueduct

Washington Aqueduct
U.S. National Register of Historic Places
U.S. National Historic Landmark
The Union Arch Bridge carries the Washington Aqueduct across Cabin John Creek in 2008
Dalecarlia Reservoir & Treatment Plant
Location	5900 MacArthur Blvd., NW Washington, D.C.
Coordinates	38°56′15″N 77°6′51″W / 38.93750°N 77.11417°W / 38.93750; -77.11417
Built	1853-1864
Architect	Montgomery C. Meigs
NRHP reference No.	73002123
Significant dates
Added to NRHP	September 8, 1973
Designated NHL	November 7, 1973

The Washington Aqueduct is an aqueduct that provides the public water supply system serving Washington, D.C., and parts of its suburbs, using water from the Potomac River. One of the first major aqueduct projects in the United States, it was commissioned by the U.S. Congress in 1852, and construction began in 1853 under the supervision of Montgomery C. Meigs and the U.S. Army Corps of Engineers. Portions of the aqueduct went online on January 3, 1859, and the full pipeline began operating in 1864.^[1]: 68

The system is owned and operated by the U.S. Army Corps of Engineers and has been in continuous use ever since. It is listed as a National Historic Landmark. The Union Arch Bridge, which carries a portion of the aqueduct, is also listed as a Historic Civil Engineering Landmark.