That looks like yet another incredible exploration at Niagara, and it's well captured. I'm really anticipating those details, and Kowalski's full write up.

maybe one of the nicest of your tunnel shots. diggin on the dynamic swooping spiral of the bricks-- up and over and in--and how the light appears to be coming maybe from the end of the tunnel. good one.

It's interesting because I remember the previous tailrace photography to have been done at night, and now we have one with some overexposed sunlight.

Wow man, that is just amazing.