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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.
The lock chambers are massive concrete structures. The side walls are from 45 to 55 ft (14 to 17 m) thick at the bases; toward the top, where less strength is required, they taper down in steps to 8 ft (2.4 m). The center wall between the chambers is 60 ft (18 m) thick and houses three galleries that run its full length.
The program's purpose was to replace the system of outdated wicket dams and small locks. The new dams were non-navigable and made of concrete and steel. Each dam has two adjoining locks, one 600-foot by 110-foot chamber, and a 1,200-foot by 110-foot chamber to accommodate fifteen barges that can lock through in one maneuver. [2]
The 1828 design originally filled the lock chamber through the use of culverts in the lock masonry. The wicket, i.e. large paddle valve, hidden in the masonry recess where the upper gate fit in, would be opened, and water would flow through the lock masonry to three openings in the lock chamber.
The lock at Starved Rock Lock and Dam is an Ohio River Standard navigational lock of 110 by 600 feet (34 by 183 m). [1] The lock has a drop/lift of about 18 feet (5 m). [2] [5] The chamber of the lock is formed by two parallel gravity section walls 38 feet (12 m) tall on the north and south. [1]
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The repurposing of the Proprietors of Locks and Canals allowed the Associates to sell water power to other companies, starting with the Hamilton Canal, leading to the explosive growth of the town, and then shortly thereafter, city, of Lowell. Pawtucket Gatehouse, from the above the falls side. Barge lock chamber to the right of the gatehouse.
She adds that slow cooker lids come with holes to vent the steam, so even if you lock your lid while cooking, your pot (and your food) may turn out fine. "Always refer to the user manual before ...