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Lock and Dam No. 18 is a lock and dam located near Gladstone, Illinois and Burlington, Iowa on the Upper Mississippi River around river mile 410.5. The movable dam is 1,350 feet (411.5 m) and consists of 3 roller gates and 14 tainter gates. The lock is 110 feet (33.5 m) wide by 600 feet (182.9 m) long.
The lock has a standard 100-by-600-foot (30 m × 183 m) chamber, similar to other locks on the river, and a vertical lift of 11 feet (3.4 m). The dam is 536 feet (163 m) long and includes 108 wicket gates and a Tainter gate ; it is one of two Illinois dams that still use wicket gates. [ 4 ]
The main lock is 1,200 feet (370 m) long and 110 feet (34 m) wide; the auxiliary is 600 feet (180 m) long and 110 feet (34 m) wide. The main lock has a vertical lift gate and a miter gate while the aux. lock has two miter gates. The dam is 1,160 feet (350 m) long with 9 tainter gates, each 110 feet (34 m) wide by 42 feet (13 m) high.
The lock and dam, as well as a similar lock and dam near Peoria, were needed when the authorized channel depth was raised to nine foot. The Peoria and LaGrange locks replaced older locks on the lower Illinois River. The lock uses Chanoine wicket gates, which allow for navigation on the river, rather than the Tainter gates seen elsewhere on the ...
[1] [3] The dam measures 293 feet (89 m) and includes 4 vertical sluice gates. [4] The lock and dam are used to maintain a 9-foot navigation channel, and for flood control purposes, primarily to limit diversion from the lake during normal periods, and mitigation of backflows into Lake Michigan during large storm events which reverse the ...
[citation needed] Due to queuing at Lock and Dam Number 52 and Lock and Dam Number 53, it can take cargo traffic 15 to 20 hours each to transit the locks the Olmsted complex is intended to replace. [6] When initiated the complex was projected to cost $775 million. [6] As of February 2018, the estimated cost of the project is over $3 billion. [7 ...
The lock chamber is 600 feet (180 m) long, 80 feet (24 m) wide, and 22 feet (6.7 m) deep and can accommodate up to 100 vessels at once. It contains two pair of 30 feet (9.1 m) tall sector gates. [4] The lock requires 12–15 minutes to cycle through a typical water-level difference of two to five feet (0.61 to 1.52 m). [2]
The lock at the complex is 110 by 600 feet (34 by 183 m) and has four Miter gates, with a 34-foot (10.3 meter) drop. The dam is 2,372 feet (723 m) long and includes concrete and earthen segments. The complex also includes a disused junction lock for the Illinois and Michigan Canal, the control station for the lock, and a modern pump house. [2]