Historic Bridges: St. Lawrence River (Fleuve Saint-Laurent)
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.
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NY-812 Over St. Lawrence River (Fleuve Saint-Laurent) in Prescott and Ogdensburg: Leeds and Grenville United Counties, Ontario and St. Lawrence County, New York, Canada
Metal Pony Truss Stiffening Wire Cable Suspension, Fixed and Approach Spans: Metal 10 Panel Rivet-Connected Warren Deck Truss, Fixed
Length: 7,385 ft.
Main Span: 1,143 ft.
Roadway: 26 ft.
Main Spans: 3
Built 1960
By: American Bridge Company of New York, New York
and Modjeski and Masters
Autoroute 10, Autoroute 15, and Autoroute 20 Over St. Lawrence River (Fleuve Saint-Laurent) in Montréal and Brossard: Montréal, Québec and Montérégie, Québec, Canada
Metal Cantilever Bolt-Connected Warren Through Truss, Fixed and Approach Spans: Metal Bolt-Connected Warren Deck Truss, Fixed
Length: 11,286 ft.
Main Span: 707 ft.
Roadway: 74 ft.
Main Spans: 3
Built 1962
By: Dominion Bridge Company of Montréal, Québec
and Philip Louis Pratley and Henry Hugh Lewis Pratley
QC-175 and Railroad (Canadian National) Over St. Lawrence River (Fleuve Saint-Laurent) in Québec City and Lévis: Capitale-Nationale, Québec and Chaudiére-Appalaches, Québec, Canada
Metal Cantilever Pin-Connected K-Truss Through Truss, Fixed and Approach Spans: Metal Rivet-Connected Warren Deck Truss, Fixed
Length: 3,239 ft.
Main Span: 1,800 ft.
Roadway: 94 ft.
Main Spans: 3
Built 1917
By: St. Lawrence Bridge Company of Montréal, Québec
and George Herrick Duggan, Ralph Modjeski, and Others
Railroad (Canadian National) Over St. Lawrence River (Fleuve Saint-Laurent) in Coteau-du-Lac and Salaberry-de-Valleyfield: Montérégie, Québec, Canada
Metal 12 Panel Rivet-Connected Camelback Through Truss, Movable: Swing (Rim Bearing Center Pier) and Approach Spans: Metal 8 Panel Rivet-Connected Camelback Through Truss, Fixed
Length: 3,900 ft.
Main Span: 355 ft.
Main Spans: 1
Autoroute 55 Over St. Lawrence River (Fleuve Saint-Laurent) in Trois-Rivières and Bécancour: Mauricie, Québec, Canada
Metal Cantilever (Arch and Suspended Deck) Bolt-Connected Warren Through Truss, Fixed and Approach Spans: Corrugated Multi-Plate Bolt-Connected Warren Through Truss, Fixed
Length: 8,881 ft.
Main Span: 1,100 ft.
Main Spans: 3
Built 1967
By: Dominion Bridge Company of Montréal, Québec
and Georges Demers
Autoroute 73 (Autoroute Robert-Cliche) Over St. Lawrence River (Fleuve Saint-Laurent) in Québec City and Lévis: Capitale-Nationale, Québec and Chaudiére-Appalaches, Québec, Canada
Metal Deck Truss Stiffening Wire Cable Suspension, Fixed and Approach Spans: Concrete Stringer (Multi-Beam), Fixed
Length: 4,461 ft.
Main Span: 2,190 ft.
Main Spans: 3
Built 1970
By: Unknown
and Parsons Brinckerhoff of New York, New York and Demers, Vaudry, Gronquist
