HistoricBridges.org Bridge Locator

Nearby Bridges: 5
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Thousand Islands Bridge
South Channel (American) Bridge
HSR

Rough Distance: 0 Miles (0 Kilometers)

I-81 Over St. Lawrence River (Fleuve Saint-Laurent) South Channel in Rural: Jefferson County, New York, United States

Metal Plate Girder Stiffening Wire Cable Suspension, Fixed and Approach Spans: Metal Deck Girder, Fixed

Length: 4,500 ft. Main Span: 800 ft. Roadway: 24 ft. Main Spans: 3

Built 1937 By: American Bridge Company of New York, New York and Robinson and Steinman of New York, New York

This southern portion of the Thousand Islands Bridge system features the largest span of the bridge system.

Ledges Road Bridge
HSR

Rough Distance: 1.7 Miles (2.7 Kilometers)

Ledges Road Over Mullet Creek in Rural: Jefferson County, New York, United States

Metal 4 Panel Welded Double-Intersection Warren Pony Truss, Fixed

Length: 70 ft. Main Span: 62 ft. Roadway: 21.7 ft. Main Spans: 1

Built By: Unknown

This pony truss is an example of an unusual standard design welded truss found only in New York State.

Thousand Islands Bridge
International Rift Bridge
HSR

Rough Distance: 2.8 Miles (4.5 Kilometers)

I-81 and KH-137 Over St. Lawrence River (Fleuve Saint-Laurent) (International Rift) in Rural: Leeds and Grenville United Counties, Ontario and Jefferson County, New York, Canada and United States

Concrete (Stone Faced) Rigid-Frame, Fixed

Length: 102 ft. Main Span: 96 ft. Roadway: 30 ft. Main Spans: 1

Built 1938 By: R. A. Blythe of Toronto, Ontario

This central portion of the Thousand Islands Bridge system is noted as one of the smallest international bridges.

Thousand Islands Bridge
North Channel (Canadian) Bridge
HSR

Rough Distance: 3.8 Miles (6.1 Kilometers)

KH-137 Over St. Lawrence River (Fleuve Saint-Laurent) North Channel in Rural: Leeds and Grenville United Counties, Ontario, Canada

Metal Plate Girder Stiffening Wire Cable Suspension, Fixed

Length: 3,330 ft. Main Span: 750 ft. Main Spans: 3

Built 1938 By: Canadian Bridge Company of Walkerville, Ontario and Robinson and Steinman of New York, New York

This northern portion of the Thousand Islands Bridge system has a remarkable span variety including truss, suspension, and arch!

X
Landons Bay Bridges
HSR

Rough Distance: 6.1 Miles (9.9 Kilometers)

1000 Islands Parkway (Old KH-2) Over Landons Bay in Rural: Leeds and Grenville United Counties, Ontario, Canada

Metal 6 Panel Rivet-Connected Polygonal Warren Pony Truss, Fixed

Main Span: 98 ft. Main Spans: 1

Built 1940 By: Unknown

Originally a divided highway, this crossing was buiilt as two truss bridges side by side, but today only one carries traffic.

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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