MONONGAHELA RIVER FACTS
The Monongahela River (128m; 206k), known at the "Mon," begins at the West Fork and Tygart rivers in Fairmont, West Virginia. It flows through West Virginia into Western Pennsylvania then meets the Allegheny River at Pittsburgh to form the Ohio.

•  Native Americans named the river Monongahela, which means river with crumbling or falling banks

•  It has the distinction of being one of the few rivers in the United States that runs north.

•  Boatbuilding was the first industry on the Mon and as such created the vessel that Lewis & Clark used to explore the territory.

•  At the height of steel production in Pittsburgh, 58 mills operated along the Monongahela River.