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Thousand Island International Bridge

Thousand Islands International  Bridge


The 1000 Islands Bridge extends from Collins
Landing near Alexandria Bay, New York to Ivy Lea
near Gananoque, Ontario covering a distance of 8.5 .
miles and provides direct connection between US
Interstate Rt. 81 and Canada Highway 401.The
crossing over the American channel of the St.
Lawrence River from the mainland to Wellesley
Island, consists of a suspension bridge of 800 ft.
(main span), with an underclearance of 150 ft.
above the river. The American span from
abutment to abutment is 4500 ft. The Canadian
Crossing includes the 600 ft. continuous Warren
Truss span connecting Hill Island to Constance
Island. A steel arch of 348 ft. spans from Constance
Island to Georgina Island. A suspension bridge of
750 ft. from Georgina Island to the Canadian
mainland (Ontario) with the suspension span
providing 120 ft. of underclearance above the river.
The Canadian span from abutment to abutment is
3,330 ft. The boundary at the International Rift,
between Wellesley Island and Hill island, is bridged
by two parallel 90 ft. rigid frame arched spans of
reinforced concrete with masonry facing. Originally
there was only one bridge at the boundary or
International Rift, however increased traffic
demanded twinning the crossing in 1959
Groundbreaking ceremonies were held at
Collins Landing, New York, on April 30, 1937
with several thousand people on hand for this
eventful occasion, both US and Canadian.


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