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