The Bankhead Tunnel, formally the John H. Bankhead Tunnel, is a road tunnel in Mobile, Alabama that carries Government Street under the Mobile River from Blakeley Island to the downtown Mobile business district. It is named for John Hollis Bankhead, an Alabama politician and U.S. Senator (served 1907-1920) who was also the grandfather of actress Tallulah Bankhead. It, like the larger George Wallace Tunnel (built 1969-1973) a few blocks downriver from it, was constructed in Mobile at the shipyards of the Alabama Drydock and Shipbuilding Company (ADDSCO), from 1938-1940. The eastern end of the Bankhead Tunnel features a large "flood door" that can be closed to prevent water from Mobile Bay flooding the tunnel during surges from hurricanes or tropical storms.