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Historic Bridges: St. Lawrence River (Fleuve Saint-Laurent) South Channel

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: 3

Barnhart Island Road Bridge
HSRNational HSR. Local HSR.
Click to visit page.
Barnhart Island Road Over St. Lawrence River (Fleuve Saint-Laurent) South Channel in Rural: St. Lawrence County, New York, United States
Metal Continuous Rivet-Connected Warren Through Truss, Fixed
Length: 1,074 ft. Main Span: 509 ft. Main Spans: 3
Built 1956 By: Unknown
This is an outstanding and uncommon example of a mid-20th century riveted continuous through.
Seaway International Bridge
South Channel Bridge
HSRNational HSR. Local HSR.
Click to visit page.
Seaway International Bridge Road Over St. Lawrence River (Fleuve Saint-Laurent) South Channel in Cornwall: St. Lawrence County, New York and Stormont Dundas and Glengarry United Counties, Ontario, Canada and United States
Metal Pony Truss Stiffening Wire Cable Suspension, Fixed and Approach Spans: Metal Deck Girder, Fixed
Length: 3,480 ft. Main Span: 895 ft. Roadway: 27 ft. Main Spans: 3
Built 1958 By: American Bridge Company of New York, New York
This graceful suspension bridge was built as part of a two-bridge system that carries traffic between the United States and Canada.
!
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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