Lock and Dam No. 5

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Lock and Dam No. 5 is a lock and dam located in Buffalo County, Wisconsin and Winona County, Minnesota on the Upper Mississippi River around river mile 738.1. It was constructed and placed in operation May 1935. The site underwent major rehabilitation from 1987 through 1998. The dam consists of concrete structure 1,619 feet (493.5 m) long with six roller gates and 28 tainter gates and an earth embankment 18,000 feet (5,486.4 m) long. The lock is 110 feet (33.5 m) wide by 600 feet (182.9 m) long. The lock and dam are owned and operated by the St. Paul District of the United States Army Corps of Engineers-Mississippi Valley Division.

Key Information

Lock and Dam No. 5
Mississippi River Lock and Dam number 5.
Location of Lock and Dam No. 5 in Minnesota
Location	Winona County, Minnesota / Buffalo County, Wisconsin, United States, Near Minnesota City, Minnesota.
Coordinates	44°09′40″N 91°48′39″W / 44.16111°N 91.81083°W / 44.16111; -91.81083
Construction began	1933; 92 years ago (1933)
Opening date	May 1935; 90 years ago (1935)
Operators	U.S. Army Corps of Engineers, St. Paul District
Dam and spillways
Impounds	Upper Mississippi River
Length	1,619 feet (493.5 m)(movable portion)
Reservoir
Creates	Pool 5
Total capacity	106,600 acre⋅ft (0.1315 km3)
Catchment area	58,845 sq mi (152,410 km2)
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Wikimedia Commons has media related to Mississippi River Lock and Dam number 5.

• U.S. Army Corps of Engineers, St. Paul District: Lock and Dam 5
• U.S. Army Corps of Engineers, St. Paul District: Lock and Dam 5 brochure
• Historic American Engineering Record (HAER) No. MN-22, "Upper Mississippi River 9-Foot Channel Project, Lock & Dam No. 5, Minneiska, Winona County, MN", 92 photos, 11 data pages, 6 photo caption pages