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Title
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Government Bridge and Roller Dam, Davenport, Iowa, Arsenal Bridge, Lock and Dam No. 15
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Description
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An aerial view of the Government Bridge and the Lock and Dam No. 15 with the city of Davenport, Iowa, in the background. The Lock and Dam No. 15, completed in 1933, spans the Mississippi River between Rock Island, Illinois and Davenport, Iowa. It is the largest roller dam in the world, its dam is 1,203 feet (366.7 m) long and consists of nine 109 feet (33.2 m) non-submersible, non-overflow roller gates and two 109 feet (33.2 m) non-submersible overflow roller gates. It was designed solely to form pools to make commercial river traffic possible and is not situated perpendicular to the flow of the river. It is also one of the few roller dams that features an auxiliary lock. It is listed in the National Register of Historic Places. 1940 postmark. Number 66735.
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Date Created
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1940
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PID
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grinnell:16954