Lock and Dam No. 20
Dam on the Upper Mississippi River, US / From Wikipedia, the free encyclopedia
Lock and Dam No. 20 is a lock and dam located on the Upper Mississippi River, the lock side in Canton, Missouri and the dam crossing to Meyer, Illinois.
Quick Facts Country, Location ...
Lock and Dam No. 20 | |
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Country | United States |
Location | Lima Township, Adams County, Illinois / Canton Township, Lewis County, Missouri, near Meyer, Illinois and Canton, Missouri |
Coordinates | 40°8′39″N 91°30′36″W[1] |
Construction began | 1932 (1932) |
Opening date | November 20, 1935 (1935-11-20) |
Construction cost | US$4.45 million |
Operator(s) | U.S. Army Corps of Engineers, Rock Island District |
Dam and spillways | |
Impounds | Upper Mississippi River |
Length | 2,369 feet (722 m) |
Reservoir | |
Creates | Pool 20 |
Total capacity | 58,000 acre⋅ft (0.072 km3) |
Catchment area | 134,300 sq mi (348,000 km2) |
Lock and Dam No. 20 Historic District | |
Location | 1⁄2 mi (800 m) N of Henderson St, Canton, Missouri |
Area | 83.9 acres (34.0 ha) |
Built | 1935 |
Architect | US Army Corps of Engineers; Abbott, Edwin E. |
MPS | Upper Mississippi River 9-Foot Navigation Project MPS |
NRHP reference No. | 04000180[2] |
Added to NRHP | March 10, 2004 |
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The structure is located at river mile 343.1. It includes a 2,369 feet (722 m) long dam, 40 tainter gates, 3 roller gates, and a lock chamber that is 110 feet (34 m) wide by 600 feet (183 m) long. There is also an incomplete auxiliary lock. In 2004, the facility was listed in the National Register of Historic Places as Lock and Dam No. 20 Historic District, #04000180 covering 839 acres (340 ha), 1 building, 6 structures, 3 objects.