Lock and Dam No. 21

Dam on the Upper Mississippi River, US

Dam in Illinois, USA

39°54′21.97″N 91°25′55.87″W / 39.9061028°N 91.4321861°W / 39.9061028; -91.4321861Construction began1933Opening dateJuly 23, 1938Operator(s)

U.S. Army Corps of Engineers, Rock Island DistrictDam and spillwaysImpoundsUpper Mississippi RiverLength1,265 feet (385.6 m) (movable portion)ReservoirCreatesPool 21Total capacity62,000 acre⋅ft (0.076 km³)Catchment area135,000 sq mi (350,000 km²)

Lock and Dam No. 21 Historic District

U.S. National Register of Historic Places

U.S. Historic district

Show map of Illinois

Show map of the United States

Location0.5 mi. W of IL 57, Quincy, IllinoisArea107.5 acres (43.5 ha)Built1938ArchitectUS Army Corps of Engineers; Abbott, Edwin E., et al.MPSUpper Mississippi River 9-Foot Navigation Project MPSNRHP reference No.04000181^[1]Added to NRHPMarch 10, 2004

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.^[2] 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.^[3]

References

^ "National Register Information System". National Register of Historic Places. National Park Service. July 9, 2010.
^ "Lock & Dam 21" (PDF). U.S. Army Corps of Engineers. Archived from the original (PDF) on January 6, 2014. Retrieved January 5, 2014.
^ WGEM Archived September 27, 2007, at the Wayback Machine

External links

Media related to Mississippi River Lock and Dam number 21 at Wikimedia Commons

Historic American Engineering Record (HAER) No. IL-30, "Mississippi River 9-Foot Channel Project, Lock & Dam No. 21, Upper Mississippi River, Quincy, Adams County, IL"
Lock and Dam No. 21 - U.S. Army Corps of Engineers

List of locks and dams of the Upper Mississippi River

USAF
LSAF
1
2
3
4
5
5A
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
24
25
26
27

Upstream:
Lock and Dam No. 20

Downstream:
Lock and Dam No. 22

v t e U.S. National Register of Historic Places
Topics	Architectural style categories Contributing property Historic district History of the National Register of Historic Places Keeper of the Register National Park Service Property types
Lists by state	List of U.S. National Historic Landmarks by state: Alabama Alaska Arizona Arkansas California Colorado Connecticut Delaware Florida Georgia Hawaii Idaho Illinois Indiana Iowa Kansas Kentucky Louisiana Maine Maryland Massachusetts Michigan Minnesota Mississippi Missouri Montana Nebraska Nevada New Hampshire New Jersey New Mexico New York North Carolina North Dakota Ohio Oklahoma Oregon Pennsylvania Rhode Island South Carolina South Dakota Tennessee Texas Utah Vermont Virginia Washington West Virginia Wisconsin Wyoming
Lists by insular areas	American Samoa Guam Minor Outlying Islands Northern Mariana Islands Puerto Rico Virgin Islands
Lists by associated state	Federated States of Micronesia Marshall Islands Palau
Other areas	District of Columbia American Legation, Morocco
Related	National Historic Preservation Act Historic Preservation Fund List of jails and prisons on the National Register of Historic Places University and college buildings listed on the National Register of Historic Places
National Register of Historic Places portal Category