Lock and Dam No. 22 is a

lock Lock(s) may refer to: Common meanings *Lock and key, a mechanical device used to secure items of importance *Lock (water navigation), a device for boats to transit between different levels of water, as in a canal Arts and entertainment * ''Lock ...

and

dam A dam is a barrier that stops or restricts the flow of surface water or underground streams. Reservoirs created by dams not only suppress floods but also provide water for activities such as irrigation, human consumption, industrial use ...

located near

Saverton, Missouri Saverton is an unincorporated community in eastern Ralls County, Missouri, United States. It is located on the Mississippi River, approximately ten miles southeast of Hannibal. Saverton is part of the Hannibal Micropolitan St ...

, on the Upper

Mississippi River The Mississippi River is the second-longest river and chief river of the second-largest drainage system in North America, second only to the Hudson Bay drainage system. From its traditional source of Lake Itasca in northern Minnesota, it f ...

around

river mile A river mile is a measure of distance in miles along a river from its mouth. River mile numbers begin at zero and increase further upstream. The corresponding metric unit using kilometers is the river kilometer. They are analogous to vehicle road ...

301.2. The movable portion of the dam is long and consists of three roller gates and ten

tainter gate The Tainter gate is a type of radial arm floodgate used in dams and canal locks to control water flow. It is named for Wisconsin structural engineer Jeremiah Burnham Tainter. A side view of a Tainter gate resembles a slice of pie with the c ...

s. A long submersible earthen dike extends to a flood control levee on the

Illinois Illinois ( ) is a U.S. state, state in the Midwestern United States, Midwestern United States. Its largest metropolitan areas include the Chicago metropolitan area, and the Metro East section, of Greater St. Louis. Other smaller metropolita ...

shore. The main lock is wide by long; there is also an incomplete auxiliary lock. In 2004, the facility was listed in the

National Register of Historic Places The National Register of Historic Places (NRHP) is the United States federal government's official list of districts, sites, buildings, structures and objects deemed worthy of preservation for their historical significance or "great artistic v ...

as Lock and Dam No. 22 Historic District, #04000182 covering , 1 building, 5 structures, 4 objects. When the northern part of Mississippi freezes, near the first week of February, upwards of 20

bald eagle The bald eagle (''Haliaeetus leucocephalus'') is a bird of prey found in North America. A sea eagle, it has two known subspecies and forms a species pair with the white-tailed eagle (''Haliaeetus albicilla''), which occupies the same niche as ...

s fly down to fish in the churning waters below Lock and Dam No. 22.

References

External links

Lock and Dam No. 22 - U.S. Army Corps of Engineers
* Dams completed in 1938 Mississippi River locks Dams in Illinois Dams in Missouri National Register of Historic Places in Ralls County, Missouri 21 United States Army Corps of Engineers dams Transport infrastructure completed in 1938 Roller dams Gravity dams Dams on the Mississippi River Mississippi Valley Division Historic American Engineering Record in Illinois Historic American Engineering Record in Missouri Historic districts on the National Register of Historic Places in Missouri National Register of Historic Places in Pike County, Missouri 21 21 21 1938 establishments in Missouri 1938 establishments in Illinois Transportation buildings and structures in Pike County, Illinois {{RallsCountyMO-geo-stub

See also

References

External links