South Holston Dam

South Holston Dam is a hydroelectric and flood control dam on the South Fork Holston River in Sullivan County, in the U.S. state of Tennessee. It is the uppermost of three dams on the South Fork Holston owned and operated by the Tennessee Valley Authority, which built the dam in the 1940s as part of efforts to control flooding in the Tennessee River watershed. On October 21, 1950 the valve gate closed and water began backing up to create South Holston Reservoir. Work began on the dam in December 1941, but in November 1942, the War Production Board requested that the operation be suspended because of a shortage of critical materials. Work did not resume until July 1, 1947. The dam now impounds the South Holston Lake of, which extends northeastward across the Tennessee-Virginia state line.LocationSouth Holston Dam is located 50mi above the South Fork Holston River's confluence with the North Fork Holston River (which forms the Holston River proper). The dam site is situated in an area where the river descends out of the Appalachian Mountains and enters the upper Holston Valley. The dam and the Tennessee half of its reservoir are surrounded by the Cherokee National Forest, and the Virginia half of the reservoir is surrounded by the Jefferson National Forest. The reservoir includes parts of Sullivan County in Tennessee and Washington County in Virginia. The city of Bristol straddles the Tennessee-Virginia border a few miles northwest of South Holston Dam.