Kentucky Lake is a major navigable reservoir along the Tennessee River in Kentucky and Tennessee. Created in 1944 by the Tennessee Valley Authority's impounding of the Tennessee River by Kentucky Dam, the 160,309-acre (649 km2) lake is the largest artificial lake by surface area in the United States east of the Mississippi River, with 2,064 miles of shoreline, although the nearby Lake Cumberland is larger by volume. Kentucky Lake has a flood storage capacity of 4,008,000 acre-feet, more than 2.5 times of the next largest lake in the TVA system.