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The Monongahala River (i'm not quite sure i spelled that right), and the Allegheny River
Allegheny River (from the North East) and the Monongahela River (from the South East) meet to form the Ohio River.
The three rivers that run through Pittsburgh, PA are:Allegheny RiverOhio RiverMonongahela RiverThe Allegheny River and the Monongahela River meet at Pittsburgh to form the Ohio River.
The Allegheny, The Monongahela and the Ohio.
The Allegheny River and the Monongahela River
The Allegheny River and the Monongahela River
This strategic was the gateway to the west
This strategic was the gateway to the west
The Allegheny River and the Monongahela River
This strategic was the gateway to the west
Tne Allegheny and Monongahela flow together and form the begining of the Ohio.
A used Condom Floating down the Allegheny River in Pittsburgh