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Lock and Dam No. 4 - Wikipedia, the free encyclopedia

Lock and Dam No. 4

From Wikipedia, the free encyclopedia

Lock and Dam No. 4

Mississippi River Lock and Dam number 4.
Impounds Upper Mississippi River
Creates Pool 4
Locale Alma, Wisconsin
Maintained by United States Army Corps of Engineers
Length 1,367 feet (416.7 m) (movable portion)
Construction began 1932
Opening date May 1935
Geographical Data
Coordinates 44°19′32″N, 91°55′13″W

Lock and Dam No. 4 is a lock and dam located near Alma, Wisconsin and Kellogg, Minnesota on the Upper Mississippi River around river mile 752.8. It was constructed and placed in operation in May, 1935. Its last major rehabilitation was from 1988 to 1994. The dam consists of a concrete structure 1,367 feet (416.7 m) long with six roller gates, 22 tainter gates and an earth embankment 5,400 feet (1,645.9 m) long. The lock is 110 feet (33.5 m) wide by 600 feet (182.9 m) long. There were ten major injuries and three deaths recorded during construction of the facility.

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Locks and dams of the Upper Mississippi River
USAFLSAF123455A67891011121314151617181920212224252627
Upstream:
Lock and Dam No. 3
Downstream:
Lock and Dam No. 5

Coordinates: 44°19′32″N, 91°55′13″W


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