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Dalecarlia Reservoir is the primary storage basin for 
Washington Aqueduct Division
- U.S. Army Corps of Engineers Bethesda, Maryland Brookmont, Maryland Lakes of Montgomery County, Maryland Reservoirs in Washington, D.C. Reservoirs in Maryland Chesapeake Bay watershed Potomac River watershed United States Army Corps of Engineers The Palisades (Washington, D.C.) {{MontgomeryCountyMD-geo-stub
drinking water
Drinking water is water that is used in drink or food preparation; potable water is water that is safe to be used as drinking water. The amount of drinking water required to maintain good health varies, and depends on physical activity level, ...
in Washington, D.C., fed by an underground aqueduct in turn fed by low dams which divert portions of the Potomac River
The Potomac River () drains the Mid-Atlantic United States, flowing from the Potomac Highlands into Chesapeake Bay. It is long,U.S. Geological Survey. National Hydrography Dataset high-resolution flowline dataThe National Map. Retrieved Augu ...
near Great Falls and Little Falls. The reservoir
A reservoir (; from French ''réservoir'' ) is an enlarged lake behind a dam. Such a dam may be either artificial, built to store fresh water or it may be a natural formation.
Reservoirs can be created in a number of ways, including contr ...
is located between Spring Valley and the Palisades, two neighborhoods in Northwest
The points of the compass are a set of horizontal, radially arrayed compass directions (or azimuths) used in navigation and cartography. A compass rose is primarily composed of four cardinal directions—north, east, south, and west—each s ...
Washington, and Brookmont, a neighborhood in Montgomery County, Maryland
Montgomery County is the most populous county in the state of Maryland. As of the 2020 census, the county's population was 1,062,061, increasing by 9.3% from 2010. The county seat and largest municipality is Rockville, although the census-design ...
.
The reservoir was completed in 1858 by the United States Army Corps of Engineers
, colors =
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as part of the Washington Aqueduct
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, the Aquedu ...
project.
It began providing water on January 3, 1859. Initially the reservoir provided water to the city from the adjacent Little Falls Branch until the aqueduct construction was completed. Regular water service from the Potomac River source through the aqueduct commenced in 1864. The reservoir was modified in 1895 and 1935 to improve water quality and increase water supply.
In 1942, the headquarters of the Army Map Service
The Army Map Service (AMS) was the military cartographic agency of the United States Department of Defense from 1941 to 1968, subordinated to the United States Army Corps of Engineers. On September 1, 1968, the AMS was redesignated the U.S. Army ...
was established on the grounds adjacent to the reservoir; several buildings constructed in the 1940s still exist. In 1946, its headquarters moved to the nearby Sumner Site, which is today the Intelligence Community Campus-Bethesda.
The Capital Crescent Trail
The Capital Crescent Trail (CCT) is a , shared-use rail trail that runs from Georgetown in Washington, D.C., to Bethesda, Maryland. An extension of the trail from Bethesda to Silver Spring along a route formerly known as the Georgetown Branch ...
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. A 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
Water purification is the process of removing undesirable chemicals, biological contaminants, suspended solids, and gases from water. The goal is to produce water that is fit for specific purposes. Most water is purified and disinfected for hu ...
facility.
The reservoir is maintained by the Washington Aqueduct division of the Army Corps of Engineers.
See also
*Georgetown Reservoir
The Georgetown Reservoir is a reservoir that provides water to the District of Columbia. Part of the city’s water supply and treatment infrastructure, it is located in the Palisades neighborhood, approximately two miles downstream from the Ma ...
*McMillan Reservoir
The McMillan Reservoir is a reservoir in Washington, D.C. that supplies the majority of the city's municipal water. It was originally called the Howard University Reservoir or the Washington City Reservoir, and was completed in 1902 by the U.S. A ...
*Washington Aqueduct
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, the Aquedu ...
References
External links
Washington Aqueduct Division
- U.S. Army Corps of Engineers Bethesda, Maryland Brookmont, Maryland Lakes of Montgomery County, Maryland Reservoirs in Washington, D.C. Reservoirs in Maryland Chesapeake Bay watershed Potomac River watershed United States Army Corps of Engineers The Palisades (Washington, D.C.) {{MontgomeryCountyMD-geo-stub