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en.wikipedia.org/wiki/Lock_(water_navigation)

Locks of the Panama Canal during construction, 1913. Early completely artificial canals, across fairly flat countryside, would get ...

www.popularmechanics.com/technology/infrastructure/g2875/7-impressive-boat-locks

Dec 13, 2016 ... The Caen Hill Locks in their entirety include 29 locks over two miles—and a rise of 237 feet—along the Kennet & Avon Canal. But the most ...

www.ask.com/youtube?q=Canal+Locks&v=tfWyBz5bHj8
Apr 16, 2009 ... From the lake that feeds the lock. The lake is fed by rivers and streams, and if the canal wasn't taking water would eventually overflow the locks ...

www.eriecanal.org/locks.html

The present Erie Canal rises 566 feet from the Hudson River to Lake Erie through 35 locks. From tide-water level at Troy, the Erie Canal rises through a series of ...

www.rideau-info.com/canal/lock.html

Rideau Canal Waterway - What is a Lock - animated page.

www.history.com/topics/panama-canal/videos/panama-canal-locks

The Panama Canal allows ships to travel between the Atlantic and Pacific Oceans, saving them a long journey around the tip of South America.

www.encyclopedia.com/science-and-technology/technology/technology-terms-and-concepts/canal-lock

Get information, facts, and pictures about canal lock at Encyclopedia.com. Make research projects and school reports about canal lock easy with credible articles  ...

eriecanalcruises.com/locks

While you would need a key to open a standard lock on your front door or your car, you won't need one to open an Erie Canal lock. This discussion is about a ...