Near the confluence of the Mississippi, Ohio, Tennessee and Cumberland Rivers is where more commerce passes through than any other location on the entire U.S. inland waterways, making the U.S. Army Corps of Engineers, Louisville District’s Olmsted Locks and Dam one of the busiest locks in the country. More than 70 million tons of commerce passes through the Olmsted, Illinois, facility each year.
Olmsted Locks and Dam is very different from the other locks and dams on the Ohio River because it is the only one with a wicket dam.