Lock and Dam No. 11

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Lock and Dam No. 11

Lock and Dam #11 as seen from Eagle Point Park in Dubuque, Iowa.
Impounds Upper Mississippi River
Creates Pool 11
Locale Dubuque, Iowa
Maintained by United States Army Corps of Engineers
Length 1,478 feet (450.5 m)
Construction began 1934
Opening date 14 September 1937
Geographical Data
Coordinates 42°32′25″N, 90°38′39″W

General Zebulon Pike Lock and Dam No. 11 is a lock and dam located north of Dubuque, Iowa on the Upper Mississippi River. It was opened to navigation 14 September 1937. The movable portion of the dam is 1,478 feet (450.5 m) long and consists of 13 tainter gates and three roller gates. The non-movable part is a 3,340 feet (1,018.0 m) long non-overflow earthen dam that connects to the Wisconsin shore. The main lock is 110 feet (33.5 m) wide by 600 feet (182.9 m) long there is also an incomplete auxiliary lock.

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Aerial view of Lock and Dam No. 11. View is to the west, looking across to the Iowa side of the river.
Aerial view of Lock and Dam No. 11. View is to the west, looking across to the Iowa side of the river.
Locks and dams of the Upper Mississippi River
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Upstream:
Lock and Dam No. 10
Downstream:
Lock and Dam No. 12

Coordinates: 42°32′25″N, 90°38′39″W