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Lock and Dam No. 4 facts for kids

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Lock and Dam No. 4
Lock and dam 4 aerial.jpeg
Mississippi River Lock and Dam No. 4
Location Alma, Buffalo County, Wisconsin / Greenfield Township, Wabasha County, Minnesota, United States.
Coordinates 44°19′32″N 91°55′13″W / 44.32556°N 91.92028°W / 44.32556; -91.92028Coordinates: 44°19′32″N 91°55′13″W / 44.32556°N 91.92028°W / 44.32556; -91.92028
Construction began 1932; 89 years ago (1932)
Opening date May 1935; 86 years ago (1935)
Operator(s) United States Army Corps of Engineers logo.svg U.S. Army Corps of Engineers, St. Paul District
Dam and spillways
Impounds Upper Mississippi River
Length 1,367 feet (416.7 m) (movable portion)
Reservoir
Creates Pool 4
Total capacity 878,000 acre⋅ft (1.083 km3)
Catchment area 57,100 sq mi (148,000 km2)

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. The lock and dam are owned and operated by the St. Paul District of the United States Army Corps of Engineers-Mississippi Valley Division.

Lock&dam 4.jpg

History

Mississippi River Lock and Dam No. 4 from WIS35
Dam photographed from Wisconsin Highway 35

The lock and dam was constructed and placed in operation in May 1935. There were ten major injuries and three deaths recorded during construction of the facility. Its last major rehabilitation was from 1988 to 1994.

Photograph of crowd onshore assembled for Alma, WI dam dedication. - NARA - 282431
An old photograph dated September 1935 and captioned "Photograph of crowd onshore assembled for Alma, WI dam dedication."
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