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Summersville Dam
Summersville Lake-27527.jpg
Summersville Lake
Location Nicholas County, near Summersville, West Virginia
Coordinates 38°13′23″N 80°53′26″W / 38.22306°N 80.89056°W / 38.22306; -80.89056
Construction began 1960
Opening date 1966
Operator(s) U.S. Army Corps of Engineers, Huntington District
Dam and spillways
Impounds Gauley River
Height 390 feet (120 m)
Length 2,280 feet (690 m)
Creates Summersville Lake
Surface area 2,700 acres (11 km2)
Normal elevation 1,644 feet (501 m)

Summersville Lake is a reservoir located in the US state of West Virginia. The lake is formed by a rock-fill dam (Summersville Dam) on the Gauley River, south of Summersville in Nicholas County. It is the largest lake in West Virginia, with 2,700 acres (1,100 ha) of water and over 60 miles (97 km) of shoreline at the summer pool water level. Its maximum depth is 327 feet.


Summersville Dam-27527
Summersville Dam

The lake was constructed between 1960 and 1966 by the United States Army Corps of Engineers in order to control flooding in an 803-square-mile (2,080 km2) watershed along the Gauley River and the Kanawha River. At 390 feet (120 m) tall, 2,280 feet (690 m) long, and containing 12,000,000 cubic yards (9,200,000 m3) of dirt and rock, the dam itself is the second-largest rock-fill dam in the Eastern United States. President Lyndon B. Johnson dedicated both the dam and a new Summersville Post Office on September 3, 1966.

Hydroelectric project

In 2001, a two-year project was completed to harness the dam outflow for hydroelectric power generation. The power plant has a capacity to generate 80-\ megawatts of electricity at peak flow.


The lake also serves as a recreation area for fishing, boating, and rock climbing, as well as snorkeling and scuba diving. It serves as the eastern (upstream) end of Gauley River National Recreation Area. There is a small boat under the lake that was intentionally sunk to give divers something to view while scuba diving. Beyond the bridge that Route 19 crosses over the lake is a no-wake zone for casual boating. Located on the cliffs of Summersville Lake is the only working lighthouse in West Virginia, the Summersville Lake Lighthouse.


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