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PA-917 Bridge

Pittsburgh Road Bridge

PA-917 Bridge

Primary Photographer(s): Nathan Holth

Bridge Documented: May 5, 2013

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Key Facts

Facility Carried / Feature Intersected
PA-917 (Pittsburgh Road) Over I-70
Location
Near Bentleyville: Washington County, Pennsylvania: United States
Structure Type
Metal Through Girder, Fixed
Construction Date and Builder / Engineer
1949 By Builder/Contractor: Unknown

Technical Facts

Rehabilitation Date
Not Available or Not Applicable
Main Span Length
80 Feet (24.4 Meters)
Structure Length
85 Feet (25.9 Meters)
Roadway Width
28 Feet (8.53 Meters)
Spans
1 Main Span(s)
NBI Number
62091701600088

Historic Significance Rating (HSR)
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Bridge Documentation

This bridge no longer exists!

Bridge Status: Demolished and replaced.

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

This is a very old expressway overpass on I-70, with a 1949 construction date. It is noted for its attractive and unique design which features a through plate girder that is haunched (arched on the bottom) giving it a more graceful appearance than a typical plate girder bridge. The Historic Bridge Inventory says this bridge is of common design, but nearly all plate girder overpasses in Pennsylvania do not have this haunched design so it is not a common design. The bridge has excellent historic integrity with no major alteraions.

This bridge is slated for demolition and replacement as part of a project to reconstruct this and another nearby interchange. The onramps for PA-917 will apparently be eliminated. The onramps are interesting to note. Because they are so old, predating the interstate highway system's creation by over a decade, they are quite primitive. One of the "onramps" onto I-70 actually has stop signs! There is absolutely no acceleration lane. This stretch of I-70 is all old, and other oddities can be found in the area as a result of this early limited access highway design, but these elements are slowly being replaced as the freeway is widened and developed into Interstate standards.

Information and Findings From Pennsylvania's Historic Bridge Inventory

Discussion of Bridge

The 85'-long, built-up, haunched, steel through girder bridge, built in 1949, is supported on reinforced concrete abutments with wingwalls. Girder bridges were first developed by the railroad industry in the 1850s, and they were used on roadways beginning in the late 19th century. The bridge is of common design, and neither it nor its setting are historically or technologically significant.

Discussion of Surrounding Area

The bridge carries a two-lane road over I 70, a four-lane, divided, interstate highway with shoulders, in an area of undistinguished post-World War II commercial development. I 70, although an early interstate highway, is not historically significant.

Bridge Considered Historic By Survey: No

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Photo Galleries and Videos: PA-917 Bridge

 
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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: PA-917 Bridge

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

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