In the 20th century, Franklin County benefited from the flood control and power generation activities of the Tennessee Valley Authority (TVA), built by the President Franklin D. Roosevelt administration during the Great Depression. The TVA helped bring new industry to the area. It also created opportunities for water recreation by making new lakes, but at the same time also displaced many county residents from their soon to be submerged homes. The establishment of the federal Arnold Engineering Development Center, which is partly within the county, helped spur economic growth and technical development. The interstate highway system barely touched the county, but it did provide valuable access on Interstate 24 to nearby Chattanooga.