The Wabash River // (French: Ouabache) is a 503-mile-long (810 km) river in the Midwestern United States that flows southwest from northwest Ohio near Fort Recovery across northern Indiana to southern Illinois.
It forms the Illinois-Indiana border before draining into the Ohio River, of which it is the largest northern tributary. From the dam near Huntington, Indiana to its terminus at the Ohio River, the Wabash flows freely for 411 miles (661 km).
- U.S. Geological Survey. National Hydrography Dataset high-resolution flowline data. The National Map, accessed May 13, 2011
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