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2. Caisson lock - Wikipedia

   en.wikipedia.org/wiki/Caisson_lock

   Operation of caisson lock Contemporary engraving of the lock at Combe Hay. The caisson lock is a type of canal lock in which a narrowboat is floated into a sealed watertight box and raised or lowered between two different canal water levels. It was invented in the late 18th century as a solution to the problem posed by the excessive demand for ...

3. Lock (water navigation) - Wikipedia

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

   A plan and side view of a generic, empty canal lock. A lock chamber separated from the rest of the canal by an upper pair and a lower pair of mitre gates.The gates in each pair close against each other at an 18° angle to approximate an arch against the water pressure on the "upstream" side of the gates when the water level on the "downstream" side is lower.

4. Dorade box - Wikipedia

   en.wikipedia.org/wiki/Dorade_box

   The grey area indicates the deck of the boat. A dorade box (also called a dorade vent , collector box , cowl vent , or simply a "ventilator") is a type of vent that permits the passage of air in and out of the cabin or engine room of a boat while keeping rain, spray, and sea wash out.

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6. Combe Hay Locks - Wikipedia

   en.wikipedia.org/wiki/Combe_Hay_Locks

   The Combe Hay Locks is a derelict flight of locks on the Somerset Coal Canal near Combe Hay, Somerset, England. Twenty two locks raised the canal 134 feet (41 m) over approximately 1.6 miles (2.6 km). The lock flight was predated in the immediate area by two other methods of canal lifts—first by a series of caisson locks, then by an inclined ...

7. Soo Locks - Wikipedia

   en.wikipedia.org/wiki/Soo_Locks

   The lock consisted of two chambers back-to-back to bridge the difference in water level. [9] The each chamber ws 350 ft (110 m) long, 70 ft (21 m) wide at the top of its walls and 61.5 ft (18.7 m) at its bottom, and 12 ft (3.7 m) deep. [9] [10] The State Lock was replaced by the original Poe Lock in 1896.

8. Chicago Harbor Lock - Wikipedia

   en.wikipedia.org/wiki/Chicago_Harbor_Lock

   The Chicago Harbor Lock, also known as the Chicago River & Harbor Controlling Works, is a stop lock and dam located within the Chicago Harbor in Chicago, Illinois at the mouth of the Chicago River. It is a component of the Chicago Area Waterway System , and is used to control water diversion from Lake Michigan into the river and for navigation.

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