Google it. Highest in the world.
I’m fascinated by these devices. This lock was completed around 1900. Think about it. There was no electricity, no cars. Steam ruled. The lock operates today much like it did 100 years ago. Entirely self powered. These were the moonshot engineering projects of the day.
Tomorrow I’ll go up in the lift lock. Came down two years ago. It’s really cool to be doing this. I remember the first time I saw it. About ten years ago I was in Algonquin Park skiing in February for a few days with friends. I talked them into a detour through Peterborough to visit the lift lock. We trudged around in the snow while I blathered on about it. Thanks guys! I knew then I’d be doing this trip. Touching the frozen tower was part of the journey.