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Lock and Dam No. 21

1938 establishments in Illinois1938 establishments in MissouriBuildings and structures in Marion County, MissouriBuildings and structures in Quincy, IllinoisCentral Illinois Registered Historic Place stubs
Dams completed in 1938Dams in IllinoisDams in MissouriDams on the Mississippi RiverDams on the National Register of Historic Places in IllinoisDams on the National Register of Historic Places in MissouriGravity damsHistoric American Engineering Record in IllinoisHistoric American Engineering Record in MissouriHistoric districts on the National Register of Historic Places in IllinoisLocks on the National Register of Historic Places in IllinoisLocks on the National Register of Historic Places in MissouriMississippi River locksMississippi Valley DivisionNRHP infobox with nocatNational Register of Historic Places in Adams County, IllinoisNortheast Missouri Registered Historic Place stubsRoller damsTransport infrastructure completed in 1938Transportation buildings and structures in Adams County, IllinoisUnited States Army Corps of Engineers dams
Mississippi River Lock and Dam number 21 HAER
Mississippi River Lock and Dam number 21 HAER

Lock and Dam No. 21 is a lock and dam located at Quincy, Illinois on the Upper Mississippi River around river mile 324.9. The movable portion of the dam is 1,265 feet (385.6 m) long and consists of three roller gates and ten tainter gates. A 1,400 feet (426.7 m) long submersible dike continues to the Missouri shore. The main lock is 110 feet (33.5 m) wide by 600 feet (182.9 m) long and 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. 21 Historic District, #04000181 covering 1,075 acres (4.4 km2), 1 building, 4 structures, 4 objects. Currently there is a study being conducted by the city of Quincy to convert Lock & Dam No. 21, 20, and 22 into being hydroelectric by 2016.

Excerpt from the Wikipedia article Lock and Dam No. 21 (License: CC BY-SA 3.0, Authors, Images).

Lock and Dam No. 21
West Lock and Dam Road,

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N 39.906102777778 ° E -91.432186111111 °
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West Lock and Dam Road
62301
Illinois, United States
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Mississippi River Lock and Dam number 21 HAER
Mississippi River Lock and Dam number 21 HAER
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