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PA-910 Pennsylvania Turnpike Bridge

PA-910 Pennsylvania Turnpike Bridge

Primary Photographer(s): Nathan Holth

Bridge Documented: May 3, 2013

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Key Facts

Facility Carried / Feature Intersected
Gibsonia Road (PA-910) Over I-76 (Pennsylvania Turnpike)
Location
Rural: Allegheny County, Pennsylvania: United States
Structure Type
Metal Through Girder, Fixed
Construction Date and Builder / Engineer
1952 By Builder/Contractor: Unknown and Engineer/Design: Pennsylvania Turnpike Commission

Technical Facts

Rehabilitation Date
1992
Main Span Length
180 Feet (54.9 Meters)
Structure Length
187 Feet (57 Meters)
Roadway Width
28 Feet (8.53 Meters)
Spans
1 Main Span(s)
NBI Number
2707699004265

Historic Significance Rating (HSR)
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Bridge Documentation

This bridge no longer exists!

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

This bridge is located on the segment of the Pennsylvania Turnpike that is not the original segment, but was built in the 1950s. Even so, this bridge is a fairly old bridge in the context of the Interstate Highway System, with a 1952 construction date. The Pennsylvania Turnpike's extensive use of through plate girders for highway overpasses on the Pennsylvania Turnpike is also a bit of an oddity compared to other states. The general design of this particular bridge is standard. The details of the plate girder, and the architectural detailing of the abutments is in keeping with the design of other 1950s Pennsylvania Turnpike bridges, and as such the bridge is a good representative example of these bridges. However, the bridge is also unique because it has a very steep grade and is also built to a heavy skew, these two things making the bridge quite a bit more complex in terms of engineering. It also gives the bridge a strikingly unusual appearance. The unique hilly terrain of Pennsylvania led to many overpass bridges with unusually steep grades. This is simply a particularly exaggerated example. All original Pennsylvania Turnpike bridges are eventually going to be demolished as the entire highway is slowly being widened. Therefore, HistoricBridges.org has selected a sample of the original bridges to document for inclusion on the website to record these structures, which were an integral part of this early limited access highway.

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Photo Galleries and Videos: PA-910 Pennsylvania Turnpike Bridge

 
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Bridge Photo-Documentation
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A collection of overview and detail photos. This gallery offers photos in the highest available resolution and file size in a touch-friendly popup viewer. Alternatively, Browse Without Using Viewer
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Bridge Photo-Documentation
Mobile Optimized Photos
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: PA-910 Pennsylvania Turnpike Bridge

This historic bridge has been demolished. This map is shown for reference purposes only.

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