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
- Inventory numbers
- NY 5523230 (New York State bridge identification number)
BH 26834 (Bridgehunter.com ID)
- Inspection (as of 08/2014)
- Deck condition rating: Fair (5 out of 9)
Superstructure condition rating: Fair (5 out of 9)
Substructure condition rating: Satisfactory (6 out of 9)
Appraisal: Functionally obsolete
Sufficiency rating: 41.3 (out of 100)
- Average daily traffic (as of 2014)
- 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