A view looking south from the top of the dam between the original MWRD lock, at left, and the Lockport Powerhouse, at right, on June 19, 1923, in Lockport, Illinois.
The concrete structure on the left is the west wall of the original lock. When that lock was opened in 1907, it had the highest lift in the world at 38 feet. [Sign on chain link fence by the lock.] (HAER says that it had a 40' lift and that it was completed in 1910. AmericanCanals says 41'.)
Please see AmericanCanals for some historical photos of the lock.
CN/EJ&E lift bridge.
As we walked across it to the lock, I took his upstream view to capture the top of the sluice gate, the debris screen, and the floating debris.
Ogee Crest to avoid a turbulent flow over and down the spillway. See the end of that posting for several more pictures of this spillway that I used to illustrate the turbulence caused by an old-fashioned straight spillway design.