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However, since water is pumped between the reservoirs equally, the only water taken from these creeks now that the reservoirs are full is to replace the water lost to evaporation. During operation, the water level fluctuates by over 105 feet (30 m) in the upper reservoir and 60 feet (20 m) feet in the lower reservoir.
The Bedford Hydropower Project (Snowden) is a hydroelectric generation facility on the James River near the community of Big Island, Virginia.The project includes a low head structure completely spanning the river; river flow is split into a concrete canal leading to the hydroelectric generation facility and the natural river course.
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Smith Mountain Dam is a concrete arch dam located on the Roanoke River in Virginia, creating Smith Mountain Lake. The dam was built by Appalachian Power (a division of American Electric Power ) between 1960 and 1963 for the purposes of pumped-storage hydroelectricity .
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.
On February 23, 2004, the 770 ft (230 m) long, 1910 hydroelectric Embrey Dam was demolished, using 600 lb (270 kg) of explosives, by divers from an engineering detachment at Fort Eustis. [2] The aim of removal was to re-open miles of spawning grounds to aid populations of American Shad , herring, catadromous American eel, and other species. [ 3 ]
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The project was constructed and began generating electric power in 1930 at the site of a former dam constructed in the 1820's and reconstructed in the 1850's known as Cushaw Falls Dam. [2] The Cushaw Project consists of a 1,550-foot-long, 27-foot-high reinforced concrete dam, with a 1,500-foot-long spillway extending diagonally across the James ...