Ohio River Case Study

The Ohio River Basin, covering a drainage area of 204,000 square miles, extends 1,306 miles from the headwaters of the Alleghany River in Potter County, Pennsylvania, to the confluence of the Ohio River with the Mississippi River at Cairo, Illinois. With a length of 981 miles from the confluence of the Alleghany and Monan-gahela rivers with the Ohio River at Pittsburgh, Pennsylvania, to Cairo, Illinois, and a drainage area of 192,200 square miles, the Ohio River is the largest single tributary...