Inland Waterways Users Board members and other participants (pictured here on February 24, 2015) visited the Holt and Oliver Locks and Dams along the Black Warrior River. The river is formed about 22 miles west of Birmingham. Holt Lake, formed by the Holt Lock and Dam, Oliver Lake, formed by the Oliver Lock and Dam, and another reservoir encompass the entire course of the river for its upper 60 miles. It stretches southeast into central Tuscaloosa County and Tuscaloosa, the largest city on the river.