Claiborne Lake is a river-run reservoir with 5,930 surface acres of water which courses 60.5 miles through Wilcox, Clarke, and Monroe counties in southwest Alabama. This reservoir was constructed by the U.S. Army Corps of Engineers and impounded in 1970. This reservoir is the lowermost within the Alabama River System with the dam at river mile 72.5 and the pool ending at river mile 133, the Millers Ferry Lock and Dam. Downstream of Claiborne Dam, the Alabama River is essentially free-flowing and ultimately joins the Tombigbee River to form the Mobile River near the Mt. Vernon community.