Check out this historic lock in Plaquemine, Lousiana
A lock is a water-filled elevator of sorts designed to help one get in and out of the rivers. One of the oldest locks is in Iberville Parish in Plaquemine, Louisiana. This Plaquemine lock measures 545 feet long.
The lock was designed by George W. Goethals, who also designed the Panama Canal. At the time of its inception, the lock was an engineering marvel.
“It was the highest fresh water lift in the country,” site manager Richard Trepagnier said. “The lock chamber is 50 feet deep, but we are talking about a change in water elevation about 35 feet.”