List of crossings of the Saint Lawrence Seaway

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This is a list of bridges and other crossings of the Saint Lawrence Seaway, starting from Quebec, Canada and moving downstream to Duluth, Minnesota.

Crossing Carries Location Design
Orleans Island Bridge Bridge Street Quebec City, Quebec Suspension bridge
Quebec Bridge Province Route 175 Quebec City, Quebec Cantilever bridge
Pierre Laporte Bridge Autoroute 73 Quebec City, Quebec Suspension bridge
Laviolette Bridge Autoroute 55 Trois-Rivieres, Quebec Through arch bridge
Lafontaine Bridge Autoroute 25 Montreal, Quebec Girder bridge
Louis-Hippolyte Tunnel Autoroute 25 Montreal, Quebec Tunnel
Jacques Cartier Bridge Province Route 134 Montreal, Quebec Cantilever bridge
Concordia Bridge Pierre-Dupuy Avenue Montreal, Quebec Girder bridge
Victoria Bridge Province Route 112 Montreal, Quebec Hybrid
Champlain Bridge Autoroutes 10, 15, 20 Montreal, Quebec Hybrid
Honore Mercier Bridge Province Route 138 Montreal, Quebec Through arch bridge
Edgar Hebert Bridge Province Route 132 Beauharnois, Quebec Suspension bridge
Serge-Marcil Bridge Autoroute 30 Beauharnois, Quebec Girder bridge
Beauharnois Bridge #1 Unnamed road Beauharnois, Quebec Vertical-lift bridge
Beauharnois Bridge #2 Saint Louis Boulevard Beauharnois, Quebec Vertical-lift bridge
Beauharnois Bridge #3 Autoroute 530 Beauharnois, Quebec Vertical-lift bridge
Three Nations Crossing Ontario Route 138 Cornwall, Ontario Hybrid
Seaway Skyway Ontario Route 416 Prescott, Ontario Suspension bridge
Wesley Island Bridge Interstate 81 Wesley Island, New York Suspension bridge
International Rift Bridge I-81/ON-137 US-Canada Border Arch bridge
Thousand Islands Bridge ON-137 Ivy Lea, Ontario Hybrid
Lewiston-Queenston Bridge I-190/ON-405 US-Canada Border Arch bridge
Whirlpool Rpaids Bridge Unnamed road US-Canada Border Truss arch bridge
Rainbow Bridge ON-420 Niagara Falls Arch bridge
North Grand Isle Bridge Interstate 190 Grand Island, New York Deck truss bridge
South Grand Isle Bridge Interstate 190 Grand Island, New York Through arch bridge
Peace Bridge Queen Elizabeth Way US-Canada Border Hybrid
Wayne County Bridge Groose Isle Parkway Groose Isle, Michigan Truss swing bridge
Groose Isle Toll Bridge Bridge Road Groose Isle, Michigan Truss swing bridge
Ambassador Bridge Bridge Street US-Canada Border Suspension bridge
Detroit-Windsor Tunnel Unnamed road US-Canada Border Tunnel
MacArthur Bridge East Grand Boulavard Belle Isle, Michigan Arch bridge
Blue Water Bridge I-94/ON-402 US-Canada Border Hybrid
Little Current Swing Bridge ON-6 Little Current, Ontario Truss swing bridge
Mackinac Bridge Interstate 75 Saint Ignace, Michigan Suspension bridge
Bernt Gilbertson Bridge ON-548 St. Joseph Island, Ontario Girder bridge
Sault Ste. Marie Bridge I-75/ON-550 US-Canada Border Hybrid
Portage Canal Bridge MI-26/US-41 Houghton, Michigan Vertical-lift bridge
Aerial Lift Bridge South Lake Avenue Duluth, Minnesota Vertical-lift bridge
Blatnik Bridge Interstate 535 Duluth, Minnesota Through arch bridge
Bong Memorial Bridge US-2 Duluth, Minnesota Tied arch bridge