Summersville Lake

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 2700 acre of water and over 60 mi of shoreline at the summer pool water level. Its maximum depth is 327 feet. Part of the northern shore of the lake is managed by the West Virginia State Park system.

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 sqmi watershed along the Gauley River and the Kanawha River. At 390 ft tall, 2280 ft long, and containing 12000000 cuyd 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.

Recreation
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. Cliff Jumping has been banned at Summersville Lake since 2007.

In August 2023, Governor Jim Justice announced that 177 acres of the lake's northern shore would become Summersville Lake State Park. The park has an emphasis on rock climbing. It also offers hiking and biking trails, water activities, and camping areas.