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In 1923, the company moved again to a 33,000-square-foot (3,100 m 2) facility at its current location in Meadville. Four years later, the name of the company was changed to the Champion–DeArment Tool Company. [1] In 1933, Chief Engineer Howard Manning developed the tongue-and-groove, slip-joint pliers for which the company is known.
The location of the new locks uses part of the area excavated by the United States in 1939 and suspended in 1942 because of World War II. The new locks are connected to the existing channel system through new navigational channels. [1] The new lock chambers are 427 m (1,401 ft) long, 55 m (180 ft) wide, and 18.3 m (60 ft) deep.
The new locks are supported by new approach channels, including a 6.2 km (3.9 mi) channel at Miraflores from the locks to the Gaillard Cut, skirting Miraflores Lake. Each of these channels are 218 m (720 ft) wide, which will require post-Panamax vessels to navigate the channels in one direction at a time.
The locks themselves were made of 2,046,100 cu yd (1,564,000 m 3) of concrete. The quantity of material needed to construct the locks required extensive measures to be put in place to handle the stone and cement. Stone was brought from Portobelo to the Gatun locks, while the work on the Pacific side used stone quarried from Ancon Hill. [8]
The Great Lakes Waterway (GLW) is a system of natural channels and artificial locks and canals that enable navigation between the North American Great Lakes. [1] Though all of the lakes are naturally connected as a chain, water travel between the lakes was impeded for centuries by obstacles such as Niagara Falls and the rapids of the St. Marys ...
HAER No. MN-62, "Mississippi River 9-Foot Channel, Lock & Dam No. 1, Saint Paul, Ramsey County, MN", 30 photos, 47 data pages, 3 photo caption pages HAER No. IA-22, " Upper Mississippi River 9-Foot Channel, Lock & Dam No. 10, Guttenberg, Clayton County, IA ", 114 photos, 11 data pages, 8 photo caption pages
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Principle of operation of a pound lock; For a boat going upstream: For a boat going downstream: 1–2. The boat enters the lock. 8–9. The boat enters the lock. 3. The lower gates are closed. 10. The upper gates are closed. 4–5. The lock is filled with water from upstream. 11–12. The lock is emptied by draining its water downstream. 6.
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