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These are some of the largest lift locks in the World. They work on a very simple system. The upper lock always has 1' more water in it than the lower lock to push the lower lock to the top. Works every time!!  :biggrin:

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Massive support piston. Had to be 6' across!!
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The lock rests on the bottom here & the gates open to allow boats in/out.
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View from the top.
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This single lane tunnel runs under the entrance/exit of the upper locks. You can see the end of a liftlock ion the right upper corner.
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A bit about the locks if you can read it.
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I google searched the locks & attached the findings so you can read more about these locks if you like. These pages will have answers I don't.

http://www.google.com/search?q=peterborough+liftlocks&ie=utf-8&oe=utf-8&aq=t&rls=org.mozilla:en-US:official&client=firefox-a

Wow you're in Canaduh!  :shock2:
Did you get to see Barry?  :shrug:

What's this Canadian vacation stuff :huh:,  I ain't seen ya :pout:.  Stop bye and the bed a fodder are on Wilma :wink:. That lock system would be about the right size for my gun room eh.   Thanks for the cool picks. :corn:

We were just above Toronto when you went lefty on that groundhog James.  :eyebrow:  Matter of fact the text came in during breakfast. What a way to start a vacation day. A good late breakfast & a pic of a "good" hog in a text!!  :yoyo: :yoyo:  Barry is on the other side of Canada.

Sorry Barry!! We never made it that far west.  :nono:  Someday I would like to tho. I know you're neck of the woodless woods has some beautiful country too.  :eyebrownod: :eyebrownod:

Thats pretty wild :congrats:

I dont understand though, why it would have to have so much travel. Is there like a 25 foot difference in the water levels or something :confused:

Thats' pretty neat.  Must of been an American engineer that designed it :innocentwhistle:

There was a large piece of that canal built specifically for that liftlock. It was some thing like 7km long & the drop is actually 65'.

The link gives all kinds of pictures & useful information.

The designer was Canadian & He went to France Belgium & England to look at existing models. There is another set of these locks not far from Peterborough.

We even got a tour of an electrical generator plant on the same river. That was really cool.  :biggrin:
Here's a sample pic. I have more if anybody is interested in them.  :innocentwhistle:
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