Braddock Locks and Dam - Credit: Wikimedia Commons
Braddock Locks & Dam (previously named Monongahela Locks and Dam No. 2) is one of nine navigational structures on the Monongahela River between Pittsburgh, Pennsylvania and Fairmont, West Virginia. Built and maintained by the U.S. Army Corps of Engineers, the gated dam and the lock form an upstream pool that is for , stretching to Elizabeth, Pennsylvania. Read more on Wikipedia
Source: en.wikipedia.org