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The upper and lower reservoirs are created by earth and rock-filled embankment dams.The upper reservoir dam is 460 feet (140 m) high, 2,200 feet (670 m) long and has a structural volume of 18,000,000 cubic yards (14,000,000 m 3).
It is formed by the Occoquan Dam on the Occoquan River. Managed by the Fairfax County Water Authority, it provides an important water supply to surrounding settlements in northern Virginia, with an output of 17 million US gallons a day (64,000 m 3 /d) to 1.2 million people, including over half of the population of Prince William County. [1]
Dam and hydroelectric plant are located approximately one mile downstream of the larger Cushaw Hydroelectric Project; the address of the project is 7443 Elon Road (Virginia Route 130), Big Island, Virginia. This dam is the middle of three dams in rapid succession; the Big Island Dam is located several miles downstream. The project consists of a ...
The rock fill dam was completed in 1963 at a cost of $6.2 million. The dam is 122 feet (37 m) high and 600 feet (180 m) long. Water releases from the dam are controlled by three gates (3 feet wide, 6 feet (1.8 m) high) located in the intake structure. Lake elevation is maintained at 1,611 feet (491 m) above sea level.
The dam is 250 feet (76 m) high and 916 feet (279 m) long. The earth-filled dam is constructed of rock with a central clay core, which prevents water from passing through the dam. A 1,145-acre (463 ha) lake is formed behind the dam with almost 40 miles (64 km) of shoreline. South of the dam is the emergency spillway.
The dam impounding the Accotink Creek was built on the site of a previous dam which had existed for that same purpose from 1918 to 1922. [ 2 ] The discharge of sewage treatment plants in Fairfax and Vienna into the Accotink Creek eventually led to the contamination of the water to the point where it was no longer fit for drinking, and the Army ...
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John H. Kerr Dam is concrete gravity-dam located on the Roanoke River in Virginia, creating Kerr Lake. The dam was built by the U.S. Army Corps of Engineers between 1947 and 1953 for the purposes of flood control , and hydropower .