The Ohio is prone to spring flooding, and extensive flood control and protection devices have been constructed along the river and its tributaries. These devices also improve the river's navigability; a 9-ft (2.7-m) channel is maintained along its entire length. A system of modern locks and...
The Ohio’s tributaries include theTennessee,Cumberland,Kanawha,Big Sandy,Licking,Kentucky, andGreenrivers from the south and theMuskingum,Miami,Wabash, andSciotorivers from the north. Chief cities along the river, in addition to Pittsburgh, Cairo, Wheeling, and Louisville, areSteubenville,Marietta,...