Clarks Hill Lake

Clarks Hill Lake, officially designated J. Strom Thurmond Lake, is a major reservoir on the Savannah River straddling the border between Georgia and South Carolina. Constructed by the United States Army Corps of Engineers for flood control, hydropower, and navigation, it is one of the largest inland bodies of water in the Southeastern United States. The lake and its surrounding lands provide extensive opportunities for recreation, wildlife management, and water supply for downstream communities.

History

The impetus for the lake's construction stemmed from a long history of devastating floods along the Savannah River, most notably the catastrophic 1929 Savannah River flood. Authorized by the Flood Control Act of 1944, the project was a key component of post-World War II infrastructure development in the Southern United States. Construction of the J. Strom Thurmond Dam began in 1946 and was completed in 1952, with impoundment of the reservoir finishing in 1954. The lake was originally named for the community of Clarks Hill, South Carolina, but was officially renamed in 1988 to honor longtime U.S. Senator J. Strom Thurmond; the original name remains in common local and regional usage. The creation of the reservoir required the relocation of several communities, cemeteries, and infrastructure, including portions of the Augusta Canal.

Geography and features

The lake is situated in the Piedmont region, with its upper reaches extending into the Blue Ridge Mountains foothills. It encompasses nearly 71,000 acres of water and over 1,200 miles of shoreline within McCormick County, Abbeville County, and Edgefield County in South Carolina and Lincoln County, Columbia County, and Wilkes County in Georgia. Major tributaries feeding the reservoir include the Little River and the Broad River. Key features include the massive J. Strom Thurmond Dam, a concrete-gravity and earth-fill structure, and the Richard B. Russell Dam located immediately downstream, which forms another large reservoir. The lake is part of a series of United States Army Corps of Engineers projects that manage the Savannah River basin.

Recreation

The lake is a premier destination for outdoor activities, managed through numerous parks and facilities operated by the United States Army Corps of Engineers and state agencies like the Georgia Department of Natural Resources. Popular activities include boating, water skiing, and fishing, with the lake being nationally renowned for its populations of largemouth bass, striped bass, crappie, and catfish. The surrounding Sumter National Forest and Elijah Clark State Park offer extensive camping, hiking, and picnicking opportunities. Major annual events, such as fishing tournaments hosted by Bassmaster, are held on its waters, drawing participants from across the Southeastern United States.

Environmental impact

The reservoir's creation transformed the local ecology, establishing a new lentic ecosystem that supports different fish and wildlife populations compared to the original riverine environment. The United States Army Corps of Engineers and the South Carolina Department of Natural Resources actively manage water levels, which can significantly affect shoreline habitat, fish spawning grounds, and downstream flows into the Savannah National Wildlife Refuge. Water quality is monitored for issues such as nutrient loading, sedimentation, and algal blooms, with protection efforts coordinated under the Savannah River Basin Compact. The lake also serves as a critical heat sink and cooling water source for the Vogtle Electric Generating Plant.

Management and governance

Primary authority for the lake's operations rests with the United States Army Corps of Engineers' Savannah District, which controls dam releases for hydropower generation at the J. Strom Thurmond Dam and maintains flood storage capacity. Water release schedules are coordinated with other federal projects like the Hartwell Dam and the Richard B. Russell Dam under the guidance of the Savannah River Basin Commission. Day-to-day management of recreational facilities, land leases, and conservation areas is conducted from the Corps' office in Augusta, Georgia. Cooperative agreements with the Georgia Environmental Protection Division and the South Carolina Department of Health and Environmental Control govern water quality standards and withdrawal permits for municipalities and industries.