St. Lawrence River

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Roosevelt International Bridge (St. Lawrence County, New York)
Roadway added in 1933; removed in 1959 for building of St Lawrence Seaway
Lost Through truss bridge over St Lawrence River on New York Central RR and roadway
Replaced by a new bridge

Seaway International Bridge (North) (St. Lawrence County, New York)
Built 1962; Demolished & replaced with UCEB in 2014
Lost arched continuous warren through truss bridge over St. Lawrence River North Channel on International Bridge Road
Replaced by a new bridge

Seaway International Bridge (South) (St. Lawrence County, New York)
Built 1958
Suspension bridge over St. Lawrence River South Channel in Massena
Open to traffic

Seaway Skyway (St. Lawrence County, New York)
Built 1960
Suspension bridge over St. Lawrence River at Ogdensburg
Open to traffic

Thousand Islands Bridge (Jefferson County, New York)
Built 1938; rehabilitated 1986
Suspension bridge over St. Lawrence River on I-81
Open to traffic

Thousand Islands Bridge - International Rift Channel (Jefferson County, New York)
Built 1938; rehabilitated 1987
Concrete rigid frame bridge over St.Lawrence Rv.Ch on Rte 81
Open to traffic