The Cumberland River is a major waterway of the Southern United States. The 688-mile (1,107 km)-long river goes through 18,000 square miles (47,000 km2) of southern Kentucky and north-central Tennessee. The river flows generally west from a source in the Appalachian Mountains. It merges with the Ohio River near Paducah, Kentucky, and the mouth of the Tennessee River.
- U.S. Geological Survey. National Hydrography Dataset high-resolution flowline data. The National Map, accessed June 8, 2011
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