International
Bridges and Tunnels

Click on the links below for more information on the individual international bridges that are under the Minister’s portfolio. These structures are all located in Ontario. For details on the ownership of the existing 24 international vehicular bridges and tunnels between Canada and the United States, please consult the International Structures Ownership Chart.

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Sault Ste. Marie International Bridge
(Ontario - Michigan)

This 3 arch spans bridge connects Sault Ste. Marie, Ontario and Sault Ste. Marie, Michigan. On the American side, the bridge is located at the northern point of Interstate I-75. On the Canadian side, the bridge connects Highway 17 North and East.

The total length of the bridge structure is 2.9 km including American and Canadian approaches, with a 8.5 m roadway between curbs which provides 4.25 m traffic lanes in each direction.

Sault Ste Marie International Bridge website - Michigan Department of Transportation

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Blue Water Bridge
(Ontario - Michigan)

The Blue Water Bridge is located between Point Edward (Sarnia), Ontario and Port Huron, Michigan. The Blue Water Bridge links two major U.S. Interstates, I-69 and I-94 with a major Canadian 400 Series Highway, 402. Highway 402 then merges into Highway 401 at London, Ontario. Highway 401 is the major artery, which runs east and west from Ontario to the Atlantic Provinces. The Canadian 400 Series Highways (402 and 401) are two of the busiest highways in Canada.

The Bridge consists of two side by side bridges; a cantilever truss built in 1938 and a continuous tied arch bridge built in 1997. One bridge provides traffic into Canada while the other handles traffic into the United States.  Each bridge has 3 lanes and a total length of 1,862 m.

Blue Water Bridge website - Canada

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Seaway International Bridge
(Ontario - New York)

The Seaway International corridor is comprised of 2 bridges and a connecting roadway linking road 138 in Canada to route 37 in the United States.

The two-lane North Channel Span that connects Cornwall, Ontario to Cornwall Island, Ontario was completed in 1962 and is a high-level suspension bridge 1,621 m long and 8.2 m wide.

The two-lane South Channel Span that connects Cornwall Island to Rooseveltown, New York was completed in 1958. This high-level suspension bridge is 1061 m long and 8.2 m wide and straddles the waterway used by ocean vessels to navigate the St.Lawrence Seaway.

Seaway International Bridge Corporation website

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Thousand Islands Bridge
(Ontario - New York)

The crossing is located between Ivy Lea near Gananoque, Ontario and Collins Landing near Alexandria Bay, New York and provides direct connection between Highway 401 in Canada and the U.S. Interstate Route 81. Covering a distance of 13.68 km, it consists of two bridges measuring 243.84 m and 228.6 m, a 182.88 m continuous Warren truss span; and a 106.07 m steel arch span.

The Canadian span consists of four sections: a suspension span 230 m between towers and 37 m above high water, a 457 m viaduct, a steel arch span 106 m long and a Warren truss span 183 m long. The roadway has two lanes and a sidewalk. The International Rift bridge is 27 m long with a 5 m clearance of the water.

Thousand Island Bridge Authority website

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Peace Bridge
(Ontario - New York)

Built in 1927, this five arch span bridge is located between Fort Erie, Ontario and Buffalo, New York. The roadway has 3 lanes and measures 1,092.70 m  from terminus to terminus including buildings.

The main approaches to the Peace Bridge on the United States side are the New York State Thruway (I-190) and Porter Avenue. On the Canadian side, the principal approach highways are the Queen Elizabeth Way (QEW), Highway 3 and the Niagara Parkway.

Peace Bridge Authority website