St. Charles Air Line Bridge, Railroad bascule bridge in Chicago, US
The St. Charles Air Line Bridge spans the Chicago River with its steel structure and counterbalanced concrete weights for efficient movement.
Upon its 1919 completion, the bridge measured 260 feet in length and held the title of longest bascule-type span worldwide until 1930.
The structure received designation as a Chicago Landmark in 2007, marking its engineering influence on the city's transportation heritage.
Canadian National Railway maintains the bridge, which carries two railroad tracks over the south branch of the Chicago River.
The bridge underwent relocation and shortening to 220 feet in 1930 due to modifications in the river channel's course.
Location: Chicago
Official opening: 1919
GPS coordinates: 41.86080,-87.63440
Latest update: March 11, 2025 10:50
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