Lock and Dam No. 22

39°38′18″N 91°14′49″W / 39.63833°N 91.24694°W / 39.63833; -91.24694Construction began1934Opening dateJuly 22, 1938Operator(s) U.S. Army Corps of Engineers, Rock Island DistrictDam and spillwaysImpoundsUpper Mississippi RiverLength1,224 feet (373.1 m) (movable portion)ReservoirCreatesPool 22Total capacity80,000 acre⋅ft (0.099 km³)Catchment area137,500 sq mi (356,000 km²) LocationSecondary Rd. E, New London, MissouriArea126.8 acres (51.3 ha)Built1938ArchitectUS Army Corps of Engineers; Abbott, Edwin E., et al.MPSUpper Mississippi River 9-Foot Navigation Project MPSNRHP reference No.04000182^[1]Added to NRHPMarch 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.^[2] 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 froze in the first week of February 2007, upwards of 20 bald eagles flew down to fish in the churning waters below Lock and Dam No. 22.^{[citation needed]}

• Public Works Administration dams list

• Media related to Mississippi River Lock and Dam number 22 at Wikimedia Commons
• Lock and Dam No. 22 - U.S. Army Corps of Engineers
• Historic American Engineering Record (HAER) No. MO-35, "Upper Mississippi River Nine-Foot Channel Project, Lock & Dam Complex No. 22, Upper Mississippi River, Saverton, Ralls County, MO", 21 photos, 15 data pages, 2 photo caption pages