Monongahela River

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The Alleghany and the Monongahela rivers join at Pittsburgh to form the Ohio River.

The Monongahela River is a tributary to the Ohio River with its headwaters in the Alleghany Mountains.^[1]

The first steamboat to make a round trip from the Ohio River to New Orleans, Louisiana, and back, was built in Brownsville, on the Monongahela.^[1]

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