NOUN
- a river that rises in northern West Virginia and flows north into Pennsylvania where it joins the Allegheny River at Pittsburgh to form the Ohio River
How To Use Monongahela River In A Sentence
- A borough of southwest Pennsylvania, a suburb of Pittsburgh on the Monongahela River. Population, 21,923.
- On Oct. 26, 1948, a temperature inversion laid a blanket of cold, stagnant air over Donora, Pa., a tiny mill town on the Monongahela River.
- Pittsburgh is located at the confluence of the Allegheny and Monongahela rivers
- A borough of southwest Pennsylvania, a suburb of Pittsburgh on the Monongahela River . Population, 2, 923.
