I was right.
Basically, the doors are only shifted when the water is at the same level on both sides of the door. Obvious in retrospect, but I had an Aha! over that.
This particular gear is the upstream side of Lock 7 in Niskayuna. Vischer Ferry is the official location I think. I found it incredible that the river had got all the way up here - you can see the mud caking the bolt at the right rear. Amazing technology, these locks. Almost all of it dating back to the early parts of the 1900s.
|Lens ID||LUMIX G VARIO 14-45mm F3.5-5.6|
|Focal Length||33.0 mm (35 mm equivalent: 66.0 mm)|
|Exposure Program||Program AE|
|Flash||Off, Did not fire|