Lake Strom Thurmond, also known as Clarks Hill Lake, is a reservoir at the border between Georgia and South Carolina in the Savannah River Basin. It was created by the J. Strom Thurmond Dam during 1951 and 1952 by the U.S. Army Corps of Engineers near the confluence of the "Little River" and the Savannah River. At 71,000 acres (287 km²), it is the third-largest artificial lake east of the Mississippi River, behind the Kentucky Lake on the Tennessee River and Lake Marion on the Santee River. The J.