This Ohio River map begins in Pittsburgh, PA and ends at Cairo IL. The Ohio River is 981 Miles long and has 20 locks and dams. There are many large tributaries that give the Ohio River its size. The largest northern tributary is the Wabash River. Note that on the map at left, north is set to make this illustration fit better on this page. The Ohio River drain basin in shown below in the lighter shaded area.
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One of 89 charts from Ohio River Guidebook
Shown above are samples of Ohio River charts that are available on CD at River CDs
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