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Ogdensburg-Prescott Bridge

Seaway Skyway Bridge

Ogdensburg-Prescott Bridge

Primary Photographer(s): Nathan Holth and Rick McOmber

Bridge Documented: July 19, 2013

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Key Facts

Facility Carried / Feature Intersected
NY-812 Over St. Lawrence River (Fleuve Saint-Laurent)
Location
Prescott and Ogdensburg: Leeds and Grenville United Counties, Ontario and St. Lawrence County, New York: Canada
Structure Type
Metal Pony Truss Stiffening Wire Cable Suspension, Fixed and Approach Spans: Metal 10 Panel Rivet-Connected Warren Deck Truss, Fixed
Construction Date and Builder / Engineer
1960 By Builder/Contractor: American Bridge Company of New York, New York and Engineer/Design: Modjeski and Masters

Technical Facts

Rehabilitation Date
2011
Main Span Length
1,143 Feet (348 Meters)
Structure Length
7,385 Feet (2,251 Meters)
Roadway Width
26 Feet (7.92 Meters)
Spans
3 Main Span(s) and 29 Approach Span(s)
NBI Number
5523230

Historic Significance Rating (HSR)

Bridge Documentation

View Archived National Bridge Inventory Report - Has Additional Details and Evaluation

Although built in 1960, this bridge still retains the complex geometric beauty and span variety more typical of older bridges with its use of pony truss stiffening on its three main suspension spans and a combination of Warren deck truss and deck plate girder approach spans. The bridge approaches have a curved design, which gives the bridge a unique appearance and can result in some interesting photos from certain angles that show this curved design. Evidence of its 1960 construction is evident however due to its lack of v-lacing or lattice on the members and beams of the bridge. The bridge was designed and built by famous firms with Modjeski and Masters as the engineer and the American Bridge Company as the builder. Cable bents are present where the orientation of the main cables change and are directed straight down into the anchorages. Compared to many suspension bridges where anchorages are massive and rise right up to the deck level, the anchorages on this bridge have a small appearance and do not rise up to the deck level, and instead have concrete piers sitting on top of them to hold the spans above. According to the American Bridge Company, the main towers for this bridge are 243 feet (74 meters) tall. The cable bents are 106 feet (32 meters) tall. The truss spans are 15 feet (4.57 meters) deep and 36 feet (11 meters) wide. The two main cables are 11.75 inches (286 millimeters) in diameter composed of 37 wire rope strands. The main cables have an aluminum filler and wrapped with number nine wire.

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Photo Galleries and Videos: Ogdensburg-Prescott Bridge

 
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Bridge Photo-Documentation
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A collection of overview and detail photos. This gallery features data-friendly, fast-loading photos in a touch-friendly popup viewer. Alternatively, Browse Without Using Viewer

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Maps and Links: Ogdensburg-Prescott Bridge

Coordinates (Latitude, Longitude):
44.734770,-75.458850

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