English: Aerial view of Coffeeville Lock and Dam on the Tombigbee River, spanning the border between Choctaw and Clarke Counties near Coffeeville, Alabama, USA. View is downriver to the east. The U.S. Army Corps of Engineers constructed the dam and lock on the river to provide a nine-foot navigation channel. Coffeeville Lock and Dam is the last lock and dam down the Tombigbee River (or the first, if travelling up the Tombigbee or Black Warrior River). There are no locks and dams between Coffeeville and the Gulf of Mexico.