Braddock Locks & Dam
The 928th tallest dam in the world
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 12.6 miles (20.3 km), stretching to Elizabeth, Pennsylvania.
Dam data from Wikidata (CC0) plus curated additions. Summary from Wikipedia (CC BY-SA).