<P> The Allegheny River ( / ˌæləˈɡeɪni / AL - ə - GAY - nee ) is a principal tributary of the Ohio River ; it is located in the Eastern United States . The Allegheny River joins with the Monongahela River to form the Ohio River at the `` Point '' of Point State Park in Downtown Pittsburgh , Pennsylvania . The Allegheny River is , by volume , the main headstream of the Ohio River . </P>
<P> The Allegheny River ( / ˌæləˈɡeɪni / AL - ə - GAY - nee ) is a principal tributary of the Ohio River ; it is located in the Eastern United States . The Allegheny River joins with the Monongahela River to form the Ohio River at the `` Point '' of Point State Park in Downtown Pittsburgh , Pennsylvania . The Allegheny River is , by volume , the main headstream of the Ohio River . </P>
where is the allegheny river located on a map
where is the allegheny river located on a map
Eastern United States
Eastern United States