it starts or descends from the township of allegany oddly enough
which is in potter county
in north central Pennsylvania
The Ohio river is formed by the confluence (meeting) of the Allegheny and Monongahela rivers.
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
Pittsburgh is the town. It is in Allegheny County.
The river is formed by the confluence of the Allegheny and Monongahela rivers at Point State Park (called the "Point") in Pittsburgh, Pennsylvania. It joins the Mississippi River at Cairo, Illinois. The native Americans considered the Monongahela to be the same as the Ohio and the Allegheny as a branch.
The Allegheny River and the Monongahela River
Tne Allegheny and Monongahela flow together and form the begining of the Ohio.
A used Condom Floating down the Allegheny River in Pittsburgh