Monongahela River

The Monongahela is a 130-mile-long (210 km) river on the Allegheny Plateau in -central Virginia and  western Pennsylvania.

The flows from the confluence of its and forks in -central Virginia northeasterly into southwestern , then northerly to and its confluence with the Allegheny River to form the Ohio River. The ’s entire length is navigable via a of locks and dams.