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Pennsylvania Turnpike Allegheny River Bridge (1952)


Bridgemapper.com photo

Photo taken by Todd Wilson in 2008

BH Photo #410390

Street View 


Lost deck truss bridge over Allegheny River on the Pennsylvania Turnpike (I-76) in Plum
Plum, Allegheny County, Pennsylvania
Bridge has been demolished; replacement span open to traffic
Built 1952; rehabilitated 1987; demolished and replaced in 2010
- Modjeski & Masters of Mechanicsburg, Pennsylvania (Design)
Cantilevered Warren deck truss
Length of largest span: 534.1 ft.
Total length: 2,186.1 ft. (0.4 mi.)
Deck width: 61.0 ft.
Also called
Allegheny River Turnpike Bridge
Approximate latitude, longitude
+40.53716, -79.82218   (decimal degrees)
40°32'14" N, 79°49'20" W   (degrees°minutes'seconds")
Approximate UTM coordinates
17/599747/4488045 (zone/easting/northing)
Quadrangle map:
New Kensington West
Average daily traffic (as of 2006)
Inventory numbers
PA 02 7076 9900 4800 (Pennsylvania Bridge Management System number)
BH 30214 (Bridgehunter.com ID)
Inspection report (as of July 2009)
Overall condition: Fair
Superstructure condition rating: Fair (5 out of 9)
Substructure condition rating: Fair (5 out of 9)
Deck condition rating: Satisfactory (6 out of 9)
Sufficiency rating: 63.7 (out of 100)
View more at BridgeReports.com

Update Log 

  • June 24, 2018: New photo from Mike Daffron
  • November 7, 2017: New photo from James Baughn
  • October 24, 2010: Updated by Jason Smith: This bridge has been demolished
  • November 2, 2008: Updated by Ian Anderson
  • September 23, 2008: Updated by Kim Harvey: added category



Allegheny River I-76 Bridge
Posted October 24, 2010, by Jason Smith (JDSmith77 [at] gmx [dot] net)
Allegheny River I-76 Bridge
Posted October 24, 2010, by Jason Smith (JDSmith77 [at] gmx [dot] net)

Uh this should be the bridge that was imploded, not the one at Hunter Station.


I was there this past August and the pics will come shortly.

As for the Allegheny River span, someone has to get that profile fixed as there are three different bridges on one profile. We need to know which one is which....

Thx. JS

Allegheny River I-76 Bridge
Posted September 23, 2008, by Ian Anderson (macsignals [at] gmail [dot] com)

The Pennsylvania Turnpike Commission is currently replacing this with a concrete segmental box-girder bridge, just like the new I-76 bridge over the Susquehanna River. It will be demolished when the project is finished.