0.5 mi. N of Henderson St., Canton, Missouri. County/parish: Lewis.
Added to the National Register of Historic Places March 10, 2004. NRIS 04000180.
1 contributing building. 6 contributing structures. 3 contributing objects.
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.
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.
(read more...)National Park Service documentation: https://catalog.archives.gov/id/28891319