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Pennsylvania Turnpike Allegheny River Bridge (1952)

Allegheny County, Pennsylvania

Photos 

Bridgemapper.com photo

Photo taken by Todd Wilson in 2008

BH Photo #410390

Map 

Street View 

Facts 

Overview
Lost deck truss bridge over Allegheny River on the Pennsylvania Turnpike (I-76) in Plum
Location
Plum, Allegheny County, Pennsylvania
Status
Bridge has been demolished; replacement span open to traffic
History
Built 1952; rehabilitated 1987; demolished and replaced in 2010
Builder
- Modjeski & Masters of Mechanicsburg, Pennsylvania (Design)
Design
Cantilevered Warren deck truss
Dimensions
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)
39,547
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

Categories 

Allegheny County, Pennsylvania (431)
Allegheny River (70)
Bridgemapper.com (1,325)
Built 1952 (334)
Built during 1950s (3,862)
Cantilevered (306)
Cantilevered truss (250)
Deck truss (1,763)
Have street view (27,135)
Interstate 76 (24)
Lost (25,309)
Lost 2010 (470)
Lost during 2010s (3,324)
Modjeski & Masters (25)
 Navigable waterway (2,155)
Owned by state (16,110)
Pennsylvania (5,356)
Pennsylvania Turnpike (15)
Plum, Pennsylvania (6)
Replaced by UCEB (74)
Replaced by new bridge (17,044)
Span length 500-1000 feet (392)
Toll (170)
Total length 1000-2500 feet (1,892)
Truss (33,151)
Warren deck truss (610)
Warren truss (6,627)

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

Related Bridges 

Sources 

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Comments 

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

Additional info on the demolition:

http://www.youtube.com/watch?v=veQQq2xqIB8&feature=related

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.

http://www.youtube.com/watch?v=nW42bvbmJLk

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.

http://www.paturnpike.com/ConstructionProjects/arb/index.htm