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Historic Bridges: I-81

Special Bridge Conditions Legend: R - Former location of relocated bridge. ! - At risk for demolition or destruction. X - Confirmed demolished or collapsed. S  - Dismantled and/or in storage. L -  Severe loss of historic integrity due to alteration.


Results in this list will be limited to the first 200 results. Consider performing a more narrow search from the main BridgeSeek tool if your search here is showing 200 results.

Total Bridges Found: 1

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Thousand Islands Bridge
South Channel (American) Bridge
HSRNational HSR. Local HSR.
Click to visit page.
I-81 Over St. Lawrence River (Fleuve Saint-Laurent) South Channel in Rural: Jefferson County, New York, United States
Metal Plate Girder Stiffening Wire Cable Suspension, Fixed and Approach Spans: Metal Deck Girder, Fixed
Length: 4,500 ft. Main Span: 800 ft. Roadway: 24 ft. Main Spans: 3
Built 1937 By: American Bridge Company of New York, New York and Robinson and Steinman of New York, New York
This southern portion of the Thousand Islands Bridge system features the largest span of the bridge system.

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