7 votes

Thousand Islands Bridge



Photo taken by Doug Kerr in July 2004


BH Photo #174087

Street View 

A Series of Bridges 

Written by Geoff Hubbs; adapted from Wikipedia

Thousand Islands International Bridge system is a series of five bridges that span parts of the St. Lawrence River, ultimately connecting both banks. From south to north:
1. American mainland to Wellesley Island -U.S. South Suspension span
2. Wellesley Island to Hill Island (international crossing) BH 89150
3. Hill Island to Constance Island- Canadian through truss
4. Constance Island to Georgina Island - Canadian deck arch truss
5. Georgina Island to Canadian mainland - Canadian North Suspension span


Suspension bridge over St. Lawrence River on I-81
Jefferson County, New York
Open to traffic
Future prospects
A report produced for the owner recommends South Channel bridge replacement in 2016-2018 and historic bridge demolition in 2019. The future of the North Channel Bridge is uncertain, and should also be considered at risk for demolition.
Built 1938; rehabilitated 1986
- American Bridge Co. of New York
- Robinson & Steinman of New York, New York
Wire suspension
Length of largest span: 799.9 ft.
Total length: 4,500.2 ft. (0.9 mi.)
Deck width: 24.0 ft.
Vertical clearance above deck: 16.0 ft.
Also called
Ivy Lea Bridge
Approximate latitude, longitude
+44.30222, -75.98278   (decimal degrees)
44°18'08" N, 75°58'58" W   (degrees°minutes'seconds")
Approximate UTM coordinates
18/421607/4905910 (zone/easting/northing)
Quadrangle map:
Alexandria Bay
Average daily traffic (as of 2015)
Inventory numbers
NY 5523240 (New York State bridge identification number)
BH 26187 (Bridgehunter.com ID)
Inspection report (as of July 2017)
Overall condition: Fair
Superstructure condition rating: Fair (5 out of 9)
Substructure condition rating: Fair (5 out of 9)
Deck condition rating: Satisfactory (6 out of 9)
Sufficiency rating: 42 (out of 100)
View more at BridgeReports.com

Update Log 

  • April 27, 2020: New photo from Geoff Hubbs
  • September 27, 2018: New photos from Jann Mayer
  • October 17, 2014: New photos from Patrick S. O'Donnell
  • July 2, 2014: New Street View added by Ralph Demars
  • September 26, 2013: Updated by Nathan Holth: This bridge is at risk for demolition.


  • Doug Kerr
  • Nathan Holth
  • Patrick S. O'Donnell - 1 [dot] 991km [at] comcast [dot] net
  • Jann Mayer - jannmayer [at] gmail [dot] com
  • Geoff Hubbs


St. Lawrence River I-81 Bridge
Posted August 2, 2009, by Doug Kerr (dougtone [at] gribblenation [dot] net)

Photos from July 2004.