Allegheny County, PA

356 public highway bridges

Allegheny County Bridge Snapshot

Allegheny County, Pennsylvania contains 356 public highway bridges in the FHWA National Bridge Inventory. Roughly 48.9% are rated “Good,” 21.3% “Fair,” 4.5% “Poor,” and 4.5% are classified as structurally deficient — the federal designation for spans whose deck, superstructure, or substructure has been rated 4 or below on the 0–9 NBI scale. Structurally deficient does not mean unsafe to cross; it means the bridge is on the priority list for repair or replacement.

Inspections in PA are conducted by certified engineers from the state Department of Transportation on a 24-month cycle, and results are reported back to the FHWA each spring. The list below shows every NBI-tracked bridge in the county, sorted by inventory load rating. Use the “Sort by” controls to surface the lowest-rated spans first, and click any row for full inspection history, traffic counts, and condition trends.

Source: FHWA National Bridge Inventory. See methodology for full definitions.

356
Total Bridges
48.9%
Good
4.5%
Poor
4.5%
Structurally Deficient

Condition Distribution

Good
48.9% (174)
Fair
21.3% (76)
Poor
4.5% (16)
SD
4.5% (16)

All Bridges (356)

Lardington Road

Good

Over: Lardington Run

1/2 mi. NW of SR1028, Allegheny, PA

Built 2017 Load: 35.6 t ADT: 241

GUYS RUN RD

Good

Over: Guys Run

1028'N.OF FREEPORT RD., Allegheny, PA

Built 2017 Load: 35.6 t ADT: 3,661

WALTON RD

Good

Over: LOBBS RUN

100' SOUTHEAST OF SR 3018, Allegheny, PA

Built 2017 Load: 35.6 t ADT: 567

WILLIAM FLYNN HWY

Good

Over: WEST BRANCH DEER CREEK

@ INTERSECTION W/SR 0910, Allegheny, PA

Built 2018 Load: 35.6 t ADT: 33,174

STOTLER RD

Good

Over: PLUM CREEK

PM06 - PLUM CREEK NO. 6, Allegheny, PA

Built 2021 Load: 35.6 t ADT: 53

MCKRELL RD

Good

Over: LITTLE DEER CREEK

DL06 LIT DEER CRK NO 6, Allegheny, PA

Built 2011 Load: 36.0 t ADT: 2,036

Carrie Furnace Con

Good

Over: CSX RR

FO05 Carrie Furnace Conn., Allegheny, PA

Built 2015 Load: 36.3 t ADT: 2,000

VILSACK RD

Good

Over: S BRANCH PINE CREEK

PS06 PINE CR, So. BR., #6, Allegheny, PA

Built 2022 Load: 36.3 t ADT: 12,274

Hulton Bridge

Good

Over: N&S RR, ALLEGHENY RIVER

Hulton Bridge, Allegheny, PA

Built 2015 Load: 36.6 t ADT: 22,668

Center Ave.

Good

Over: Fallen Timber Run

500' East of SR 51, Allegheny, PA

Built 2020 Load: 36.6 t ADT: 10,527

PINEY FORK RD

Good

Over: CATFISH RUN

@ S.PARK SEWAGE PLANT, Allegheny, PA

Built 2018 Load: 36.6 t ADT: 4,250

Braddock Avenue

Good

Over: Norfolk Southern RR

NS01 KENMAWR BRIDGE, Allegheny, PA

Built 2021 Load: 36.6 t ADT: 15,000

JACOBY ROAD

Good

Over: LITTLE DEER CREEK

DL05 LIT DEER CRK NO. 5, Allegheny, PA

Built 2020 Load: 36.6 t ADT: 484

T-662

Good

Over: PA TPK (I-76)

West of Allegheny Val Int, Allegheny, PA

Built 2013 Load: 36.9 t ADT: 200

SR 400, LR228

Good

Over: PA Turnpike - I-76

Milepost 53.66, Allegheny, PA

Built 2018 Load: 36.9 t ADT: 7,708

CLIFF MINE RD

Good

Over: MONTOUR RUN

MT14 MONTOUR RUN #14, Allegheny, PA

Built 1998 Load: 37.2 t ADT: 7,310

SR 51

Good

Over: FALLEN TIMBER RUN

750' NW WEIGEL HILL RD, Allegheny, PA

Built 2009 Load: 37.2 t ADT: 22,891

COURSIN STREET

Good

Over: CSX & UNION RR

FO03 MCKEESPORT FLYOVER, Allegheny, PA

Built 2011 Load: 37.3 t ADT: 500

HULTON RD

Good

Over: PLUM CREEK

HULTON RD, Allegheny, PA

Built 2012 Load: 37.3 t ADT: 7,447

Unity Center Road

Good

Over: PA TPK (I-76)

NEAR PENN HILLS, Allegheny, PA

Built 2019 Load: 37.3 t ADT: 4,396

PANGBURN HOLLOW RD

Good

Over: PERRYMILL RUN

PG04 PANGBURN HOLLOW #4, Allegheny, PA

Built 2012 Load: 37.6 t ADT: 633

SR 0910

Good

Over: PA TPK (I-76)

Indiana Township, Allegheny, PA

Built 2016 Load: 37.6 t ADT: 6,816

PA TPK (I-76)

Good

Over: T-574

West of Gibsonia, Allegheny, PA

Built 2012 Load: 37.9 t ADT: 27,341

FORBES AVENUE

Good

Over: FERN HOLLOW CREEK

301033 NEAR S BRADDOCK AV, Allegheny, PA

Built 2022 Load: 37.9 t ADT: 15,000

LIBRARY RD

Good

Over: SAW MILL RUN

300'N.E. OF MCNEILLY RD, Allegheny, PA

Built 2003 Load: 38.1 t ADT: 21,171

SPRING RUN RD EXT

Good

Over: BOGGS RUN

BG01 BOGGS RUN 1, Allegheny, PA

Built 2011 Load: 38.1 t ADT: 2,134

Days Run Road

Good

Over: Days Run

Near Bailey Run Rd, Allegheny, PA

Built 2018 Load: 38.2 t ADT: 497

Center Ave

Good

Over: O'Connell Blvd

DK01 DOOKER'S HOLLOW BR, Allegheny, PA

Built 2021 Load: 38.2 t ADT: 4,000

SR 0060 NB

Good

Over: WEST END

BTWN MAIN AND STEUBEN STS, Allegheny, PA

Built 2008 Load: 38.6 t ADT: 7,697

Thorn Hill Road

Good

Over: PA TPK (I-76)

West of Warrendale, Allegheny, PA

Built 2015 Load: 38.6 t ADT: 22,384

GLASS RUN RD

Good

Over: GLASS RUN

NEAR SR 3100, Allegheny, PA

Built 2017 Load: 38.6 t ADT: 6,305

STREETS RUN RD

Good

Over: STREETS RUN

AT INTER./ SR 3046, Allegheny, PA

Built 2018 Load: 38.6 t ADT: 8,554

East Elfinwild Rd

Good

Over: Pine Creek

PI09 PINE CREEK # 9, Allegheny, PA

Built 2020 Load: 38.6 t ADT: 1,862

Stoops Ferry Road

Good

Over: Flaugherty Run

AT SR 3089 INT, Allegheny, PA

Built 2019 Load: 38.6 t ADT: 13,326

Station Street

Good

Over: Robinson Run

RS04 ROBINSON RUNSBR #4, Allegheny, PA

Built 2019 Load: 38.6 t ADT: 884

RT 50 Connector

Good

Over: SR 3001 - Miller Road

MP 15.93 on Rt 3001, Allegheny, PA

Built 2017 Load: 38.6 t ADT: 1,500

RAMP E

Good

Over: EMBANKMENT

@ INTER W/ 31ST BRIDGE, Allegheny, PA

Built 2013 Load: 38.9 t ADT: 2,834

SALEM HOLLOW RD

Good

Over: NORTH FORK PINE CREEK

600' FROM INTER.W/02141, Allegheny, PA

Built 2013 Load: 38.9 t ADT: 11,206

BUTLER ST

Good

Over: FILL, PED TRAIL

AT PGH ZOO, Allegheny, PA

Built 2014 Load: 38.9 t ADT: 14,090

PA TPK (I-76)

Good

Over: Mt. Pleasant Road

WEST OF WARRENDALE TOLL, Allegheny, PA

Built 2021 Load: 38.9 t ADT: 34,106

Douglas Run Rd

Good

Over: Gillespie Run

Elizabeth, Allegheny, PA

Built 2008 Load: 39.0 t ADT: 1,625

GLASS RUN ROAD

Good

Over: GLASS RUN

NEAR GLENWOOD INTERCHANGE, Allegheny, PA

Built 2015 Load: 39.0 t ADT: 6,305

SAXONBURG BLVD

Good

Over: DEER CREEK

0.5 MI NE OF SR 0910, Allegheny, PA

Built 2013 Load: 39.2 t ADT: 4,773

WB-433

Good

Over: PA TPK (I-76)

West of Indianola, Allegheny, PA

Built 2013 Load: 39.2 t ADT: 6,816

S 28th Street

Good

Over: CSX Railroad Tunnel

0.1 MI NW of Hot Metal Br, Allegheny, PA

Built 2002 Load: 39.2 t ADT: 1,500

SCRUBGRASS ROAD

Good

Over: SCRUBGRASS RUN

0.6 MI SE OF SR3052, Allegheny, PA

Built 2013 Load: 39.5 t ADT: 6,617

BUNOLA RIVER RD

Good

Over: PERRY MILL RUN

AT PANGBURN HOLLOW RD, Allegheny, PA

Built 2016 Load: 39.5 t ADT: 913

SR 0910

Good

Over: Deer Creek

2.4 mi SE of SR 0008, Allegheny, PA

Built 2019 Load: 39.5 t ADT: 4,445

GULF LAB ROAD

Good

Over: INTERSTATE 76

OVER TURNPIKE, Allegheny, PA

Built 2009 Load: 39.9 t ADT: 2,390

GRUBBS RD

Good

Over: PINE CREEK

GRUBBS ROAD, Allegheny, PA

Built 2010 Load: 39.9 t ADT: 2,100

Read our methodology — how this data is sourced, computed, and verified.

Related

Browse all → | Rankings →
Data sourced from official U.S. government datasets. See our methodology for details. Retrieved and formatted by PlainBridges Editorial