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Title
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Gateway Bridge crossing the Mississippi River, Clinton, Iowa, South Bridge
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Description
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Carrying U.S. Highway 30 connecting Illinois and Iowa, the beautiful bridge was opened to traffic on June 30, 1956. Built at a cost of $6,800,000, the main steel bridge is 4,150 ft long, overall length including approaches is 9,600 ft. The roadway is 72 ft. above normal river level and the steel towers are 175 ft. above water level. --verso. Number 6C-K1473. Series K-10.
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Date Created
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1956
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PID
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grinnell:14429
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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
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Title
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Government Bridge, Rock Island, Ill. & Davenport, Iowa, Arsenal Bridge
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Description
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The original bridge on the Mississippi River, finished in 1856, was the first railroad bridge across the Mississippi. It only lasted until 1866, and was replaced with a heavier wooden structure that reused the original piers. In turn this structure was replaced by an iron, twin deck bridge in 1872 that carried both a single rail line and a separate roadway. The federal government jointly used this bridge for access with the railroad, giving its name of Government Bridge. The current bridge is the fourth crossing of the Mississippi built in 1896 with an added rail line. It is listed in the National Register of Historic Places. 1910 postmark.
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Date Created
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1910
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PID
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grinnell:16202