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
Source: WordNetMonongahela River scene, 1857 Downtown facade memorializing Pittsburgh's industrial heritage with an image of legendary steelworker Joe Magarac The War of 1812 cut off the supply of British goods, stimulating American industry. Source: Internet
The Firstside portion of downtown borders the Monongahela River, the historic Mon Wharf and is home to the distinctive PPG Place Gothic-style glass skyscraper complex. Source: Internet