Dalecarlia Reservoir is the primary storage basin for drinking water in Washington, D.C., fed by an underground aqueduct in turn fed by low dams which divert portions of the Potomac River near Great Falls and Little Falls. The reservoir is located between Spring Valley and the Palisades, two neighborhoods in Northwest Washington, and Brookmont, a neighborhood in Montgomery County, Maryland.
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The Capital Crescent Trail runs adjacent to the reservoir and through the center of the pumping campus. The boundary between Maryland and the District of Columbia passes through the reservoir. An historic D.C. boundary marker (Northwest No. 5) is located in a woodland east of the reservoir. Another (Northwest No. 4) is located a short distance east of the Capital Crescent Trail, near the Dalecarlia water purification facility.
The reservoir is maintained by the Washington Aqueduct division of the Army Corps of Engineers.
- "Facilities". DC Water and Sewer Authority (DCWASA).
- Proposed Water Treatment Residuals Management Process for the Washington Aqueduct: Environmental Impact Statement. Vol. 1. Washington Aqueduct Division. Baltimore District. U.S. Army Corps of Engineers. Washington, D.C.: U.S. Government Printing Office, 2005, p. 3-32. Accessed 2012-12-16.
- Ways, Harry C. "Montgomery C. Meigs and the Washington Aqueduct." In Montgomery C. Meigs and the Building of the Nation's Capital. William C. Dickinson, Dean A. Herrin, and Donald R. Kennon, eds. Athens, Ohio: United States Capitol Historical Society, 2001, p. 34.
- Ways, Harry C. (1996), The Washington Aqueduct: 1852-1992, Baltimore, MD: U.S. Army Corps of Engineers, Baltimore District.
- Washington Aqueduct Division - U.S. Army Corps of Engineers
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