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Mississippi River Lock & Dam No. 21

General Information

Beginning of works: 1933
Completion: 23 July 1938
Status: in use

Project Type

Structure: Radial gate barrage
Roller drum gate barrage
Function / usage: Lock

Location

Location: , , ,
Impounds:
  • Mississippi River
Coordinates: 39° 54' 20.29" N    91° 25' 52.26" W
Show coordinates on a map

Technical Information

Dimensions

crest length 385.6 m
lock width 33.5 m
length 182.9 m

Excerpt from Wikipedia

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.

Text imported from Wikipedia article "Lock and Dam No. 21" and modified on 23 July 2019 under the CC-BY-SA 3.0 license.

 

Participants

Relevant Web Sites

  • About this
    data sheet
  • Structure-ID
    20030590
  • Published on:
    24/08/2007
  • Last updated on:
    05/06/2017
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