3 votes

Seaway Skyway


Photo taken by Hans Raffelt

License: Creative Commons Attribution-Share-Alike (CC BY-SA)


View this photo on Wikipedia

BH Photo #407709

Street View 


The Seaway Skyway is one of the longest bridges over the Saint Lawrence River. It is also one of the most unusual. The Seaway Skyway has a main span that is a suspension bridge supported by Warren pony trusses. However, the bridge also features an extensive approach system composed of a variety of deck truss types. Additionally, the entire bridge has a steel grating deck instead of an asphalt surface, something that is generally only found on historic truss bridges and moveable bridges. It is even more uncommon for a steel grating to be found on a suspension bridge.


Suspension bridge over St. Lawrence River at Ogdensburg
St. Lawrence County, New York
Open to traffic
Built 1960
Wire suspension
Length of largest span: 1,142.8 ft.
Total length: 7,385.2 ft. (1.4 mi.)
Deck width: 25.9 ft.
Vertical clearance above deck: 45.9 ft.
Also called
Ogdensburg-Prescott International Bridge
Approximate latitude, longitude
+44.72917, -75.45556   (decimal degrees)
44°43'45" N, 75°27'20" W   (degrees°minutes'seconds")
Approximate UTM coordinates
18/463926/4952965 (zone/easting/northing)
Quadrangle map:
Ogdensburg East
Average daily traffic (as of 2017)
Inventory numbers
NY 5523230 (New York State bridge identification number)
BH 26834 (Bridgehunter.com ID)
Inspection report (as of August 2018)
Overall condition: Fair
Superstructure condition rating: Fair (5 out of 9)
Substructure condition rating: Satisfactory (6 out of 9)
Deck condition rating: Fair (5 out of 9)
Sufficiency rating: 43 (out of 100)
View more at BridgeReports.com

Update Log 

  • September 1, 2021: New photo from Geoff Hubbs
  • September 27, 2018: New photos from Jann Mayer
  • October 24, 2017: Updated by Luke: Added non-Nathan photo
  • October 24, 2017: Updated by Matthew: Changed image license to All Rights Reserved per comment by Nathan Holth
  • October 23, 2017: New Street View added by Matthew
  • August 8, 2016: New Street View added by Dana and Kay Klein



Seaway Skyway
Posted October 24, 2017, by Matthew

Sorry, fixed.

Seaway Skyway
Posted October 24, 2017, by Nathan Holth (webmaster [at] historicbridges [dot] org)

Matthew: Who are you and why are you posting copyrighted photos from my website HistoricBridges.org as "Creative Commons License" on Bridgehunter without permission? I don't recall giving permission to post my photos, and I certainly have never authorized anyone to ever post any of my photos under a Creative Commons License. You are welcome to link to my website using the External Links function on this website, but these photos were the result of thousands of dollars of travel expense that I bore personally out of my own pocket, so please respect that I offer these photos for viewing free of charge on HistoricBridges.org under Copyright with All Rights Reserved. Posting them here on Bridgehunter without my permission under a false licence is both redundant and not allowed under copyright.