| Navigable for its entire length, the Ohio flows 1579 km (981 mi) from the confluence of the Allegheny and Monongahela rivers in Pittsburgh to its mouth in the Mississippi River at Cairo, Illinois. The Ohio provides a vital commercial link for industrial and agricultural interests in the Midwest, and barges on the river carry products such as coal, steel, crops, chemicals, and petroleum. This map illustrates the three major rivers of the central United States: the Missouri, the Mississippi, and the Ohio. |
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