Lock and Dam No. 22 Historic District
| Lock and Dam No. 22 | |
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Mississippi River Lock and Dam No. 22
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 Location of Lock and Dam No. 22 in Missouri
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| Location |
Cincinnati Township, Pike County, Illinois / Saverton Township, Ralls County, Missouri, near Saverton, Missouri |
| Coordinates | 39°38′18″N 91°14′49″W / 39.63833°N 91.24694°WCoordinates: 39°38′18″N 91°14′49″W / 39.63833°N 91.24694°W |
| Construction began | 1934 |
| Opening date | July 22, 1938 |
| Operator(s) | United States Army Corps of Engineers |
| Dam and spillways | |
| Impounds | Upper Mississippi River |
| Length | 1,224 feet (373.1 m) (movable portion) |
| Reservoir | |
| Creates | Pool 22 |
| Total capacity | 80,000 acre·ft (0.099 km3) |
| Catchment area | 137,500 sq mi (356,000 km2) |
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Lock and Dam No. 22 Historic District
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| Location | Secondary Rd. E, New London, Missouri |
| Area | 126.8 acres (51.3 ha) |
| Built | 1938 |
| MPS | Upper Mississippi River 9-Foot Navigation Project MPS |
| NRHP Reference # | 04000182 |
| Added to NRHP | March 10, 2004 |
Lock and Dam No. 22 is a lock and dam located near Saverton, Missouri on the Upper Mississippi River around river mile 301.2. The movable portion of the dam is 1,224 feet (373.1 m) long and consists of three roller gates and ten tainter gates. A 1,600 feet (487.7 m) long submersible earthen dike extends to a flood control levee on the Illinois shore. The main lock is 110 feet (33.5 m) wide by 600 feet (182.9 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. 22 Historic District, #04000182 covering 1,268 acres (5.1 km2), 1 building, 5 structures, 4 objects.
When the northern part of Mississippi freezes, near the first week of February, upwards of 20 bald eagles fly down to fish in the churning waters below Lock and Dam No. 22.
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