Kentucky Lake is a major navigable reservoir along the Tennessee River in Kentucky and Tennessee. It was created in 1944 by the Tennessee Valley Authority's impounding of the Tennessee River via Kentucky Dam for flood control and hydroelectric power. 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 (3,322 km) of shoreline. Kentucky Lake has a flood storage capacity of 4,008,000 acre⋅ft (4.944 km3), more than 2.5 times the next largest lake in the TVA system.