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31st STREET BRIDGE over ALLEG.RIV., RRS, LOCALS

Map

Coordinates:
+40.46461, -79.98006
40°27'53" N, 79°58'48" W

Facts

Source: National Bridge Inventory. Information not verified; use at your own risk.
Name:31st STREET BRIDGE over ALLEG.RIV., RRS, LOCALS
Structure number:000000000001672
Old structure number:022122001000250 (from 1992 edition)
Location:PITTSBURGH-31ST ST.BRIDGE
Purpose:Carries highway and pedestrian walkway over highway, waterway, and railroad
Route classification:Other Principal Arterial (Urban) [14]
Length of largest span:379.9 ft. [115.8 m]
Total length:2729.1 ft. [831.8 m]
Roadway width between curbs:34.1 ft. [10.4 m]
Deck width edge-to-edge:43.6 ft. [13.3 m]
Vertical clearance below bridge:2989.0 ft. [911.0 m]
Skew angle:99°
Owner:State Highway Agency [01]
Year built:1928
Year reconstructed:2013
Historic significance:Bridge is eligible for the National Register of Historic Places [2]
Design load:M 18 / H 20 [4]
Number of main spans:3
Main spans material:Steel [3]
Main spans design:Arch - Deck [11]
Deck type:Concrete Cast-in-Place [1]
Wearing surface:Bituminous [6]

Latest Available Inspection: June 2017

Good/Fair/Poor Condition:Fair
Status:Open, no restriction [A]
Average daily traffic:850 [as of 2017]
Truck traffic:16% of total traffic
Deck condition:Very Good [8 out of 9]
Superstructure condition:Fair [5 out of 9]
Substructure condition:Fair [5 out of 9]
Structural appraisal:Somewhat better than minimum adequacy to tolerate being left in place as is [5]
Deck geometry appraisal:Equal to present minimum criteria [6]
Underclearances appraisal:Basically intolerable requiring high priority of corrrective action [3]
Water adequacy appraisal:Superior to present desirable criteria [9]
Roadway alignment appraisal:Equal to present desirable criteria [8]
Channel protection:Bank protection is being eroded. River control devices and/or embankment have major damage. Trees and rush restrict the channel. [5]
Pier/abutment protection:Navigation protection not required [1]
Scour condition:Bridge foundations determined to be stable for the assessed or calculated scour condition. [8]
Sufficiency rating:75.7
Recommended work:Bridge rehabilitation because of general structure deterioration or inadequate strength. [35]
Estimated cost of work:$10,011,000

Previous Inspections

DateConditionDeckSuperstructureSubstructureADTSuff. Rating
June 2017FairVery GoodFairFair85075.7
June 2015FairVery GoodFairFair86077.7
June 2013FairVery GoodSatisfactoryFair620960.6
June 2011PoorPoorPoorSerious640824.5
June 2009PoorPoorPoorSerious647724.4
December 2007PoorPoorPoorPoor708534.1
2006Fair--Very Good85075.0
May 2006PoorPoorSeriousSerious697210.6
May 2005PoorPoorSeriousSerious690310.0
May 2004PoorPoorPoorSerious690310.0
May 2003PoorPoorPoorSerious623111.4
May 2002PoorPoorPoorSerious612111.7
July 2001PoorPoorPoorSerious601311.9
July 2000PoorPoorPoorSerious601311.9
November 1998PoorPoorPoorSerious579112.3
September 1997PoorPoorPoorSerious579112.3
September 1996PoorPoorPoorSerious71469.5
July 1995PoorPoorPoorSerious714624.0
August 1994PoorPoorPoorSerious601525.2

Element Data

Source: National Bridge Elements dataset, 2019 edition. This feature is experimental.
ElementUnitsQuantity1-Good2-Fair3-Poor4-Serious
Superstructure
Steel Closed Web/Box Girderlinear ft.9191000
Steel Protective Coatingsq. ft.10,75310,753000
Steel Girder/Beamlinear ft.9,0579,0272910
Steel Protective Coatingsq. ft.268,829268,829000
Steel Stringerlinear ft.14,80514,7862170
Steel Protective Coatingsq. ft.193,557193,557000
Deck
Reinforced Concrete Decksq. ft.140,052140,052000
Superstructure
Steel Archlinear ft.1,7341,731210
Steel Protective Coatingsq. ft.32,25932,259000
Steel Floor Beamlinear ft.4,9684,93915140
Steel Protective Coatingsq. ft.247,322247,322000
Substructure
Steel Columneach3433100
Steel Protective Coatingsq. ft.182,804182,804000
Reinforced Concrete Columneach21100
Reinforced Concrete Pier Walllinear ft.548367126550
Masonry Pier Walllinear ft.130130000
Reinforced Concrete Abutmentlinear ft.200200000
Reinforced Concrete Pile Cap/Footinglinear ft.5656000
Steel Pier Caplinear ft.6464000
Steel Protective Coatingsq. ft.21,50621,506000
Reinforced Concrete Pier Caplinear ft.202202000
Joints
Strip Seal Jointlinear ft.1,6831,678500
Bearings
Elastomeric Bearingeach88701800
Movable Bearingeach2625100
Steel Protective Coatingsq. ft.43,01343,013000
Fixed Bearingeach2221100
Steel Protective Coatingsq. ft.75,27275,272000
Pot Bearingeach5654200
Bridge Rail
Steel or Aluminum Bridge Raillinear ft.5,0765,076000
Steel Protective Coatingsq. ft.268,829268,829000
Reinforced Concrete Bridge Raillinear ft.266266000