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)

Blazier Drive #3

Fair

Over: Pine Creek

Blazier 3 over Pine Creek, Allegheny, PA

Built 2010 Load: 48.1 t ADT: 1,500

Lyndhurst Circuit

Fair

Over: Unnamed Tributary

340' N of Wexford RdSR910, Allegheny, PA

Built 1988 Load: 49.0 t ADT: 50

WEST FIFTH AVENUE

Fair

Over: NONE - PARALLEL TO CSX

Ramp-MA12 Homestead Br, Allegheny, PA

Built 1997 Load: 49.9 t ADT: 7,000

SR 885

Fair

Over: BLUFF

Blvd of The Allies Bluffs, Allegheny, PA

Built 2007 Load: 49.9 t ADT: 28,222

CLINTON FRANKFORT

Fair

Over: BR. RACCOON RUN

1 MI. S.W. OF SR 0030, Allegheny, PA

Built 2022 Load: 49.9 t ADT: 1,611

HOT METAL STREET

Fair

Over: MON RIVER & PRIVATE RR

145 Hot Metal Bridge, Allegheny, PA

Built 1904 Load: 50.8 t ADT: 17,500

PARKWAY EAST

Fair

Over: SQ HILL TN VULT

UNDER W POTAL/SQ HILL TN, Allegheny, PA

Built 1955 Load: 50.8 t ADT: 75,287

NORTH SHORE DRIVE

Fair

Over: PEDESTRIAN UNDER PASS

148 North Shore Dr Bridge, Allegheny, PA

Built 2001 Load: 57.2 t ADT: 10,000

SR 51 S.B.

Fair

Over: NSSR, Local Rd.

Elizabeth Bridge, Allegheny, PA

Built 1951 Load: 58.1 t ADT: 13,696

Blazier Drive #2

Fair

Over: Pine Creek

BLAZIER 2 OVER PINE CREEK, Allegheny, PA

Built 2012 Load: 62.6 t ADT: 500

HOMSTEAD-DUQ RD

Fair

Over: HOMEVILLE CREEK

HV06 HOMEVILLE CR #6, Allegheny, PA

Built 1997 Load: 63.5 t ADT: 4,975

Osborne Street

Fair

Over: Crooked Run

S. of Westghse Ave/SR 148, Allegheny, PA

Built 1940 Load: 66.2 t ADT: 200

OLD CLAIRTON ROAD

Fair

Over: LEWIS RUN BESIDE 51 SB

INTER W/ OLD CLAIRTON RD, Allegheny, PA

Built 1999 Load: 78.9 t ADT: 10,539

DUNCAN AVENUE

Fair

Over: PINE CREEK

PI0202 PINE CREEK #2, Allegheny, PA

Built 2000 Load: 79.8 t ADT: 9,100

GREENSPRING AVE

Fair

Over: BR HOMESTEAD RUN

HV0805 HOMEVILLE CRK #8, Allegheny, PA

Built 1997 Load: 83.5 t ADT: 5,860

RAYMOND SHAFER HWY

Fair

Over: MOON RUN

I-79 SB1.4 MI N OF SR 60, Allegheny, PA

Built 1973 Load: 99.8 t ADT: 22,032

PANGBURN HOLLOW RD

Good

Over: PERRY MILL RUN

PG09 PANGBURN HOLLOW RD#9, Allegheny, PA

Built 2000 Load: 20.9 t ADT: 678

PANGBURN HOLLOW RD

Good

Over: PERRY MILL RUN

PG07 PANGBURN HOLLOW RD#7, Allegheny, PA

Built 2000 Load: 22.7 t ADT: 678

S Fayette Way

Good

Over: SR 576 Southern Beltway

MP 15.28 on Rt. 576, Allegheny, PA

Built 2019 Load: 30.1 t ADT: 290

PA TPK (I-76)

Good

Over: Deer Creek

W of Allegheny Val Int., Allegheny, PA

Built 2016 Load: 32.4 t ADT: 33,531

MILLER'S RUN RD

Good

Over: MILLER'S RUN

400' NORTHWEST OF SR 0050, Allegheny, PA

Built 2000 Load: 32.7 t ADT: 5,384

PA TPK (I-76)

Good

Over: N FORK PINE CREEK

WEST OF GIBSONIA, Allegheny, PA

Built 1952 Load: 32.7 t ADT: 30,022

SR 0051 NB SB

Good

Over: LEWIS RUN

LEWIS RUN, Allegheny, PA

Built 1999 Load: 32.7 t ADT: 23,832

Mosside Blvd Rt 48

Good

Over: Access Rd

0.1mi NE OF WALL AVE, Allegheny, PA

Built 2006 Load: 32.7 t ADT: 16,042

HARTS RUN ROAD

Good

Over: BR HARTS RUN

2000FT EAST OF SR 0008, Allegheny, PA

Built 2009 Load: 32.7 t ADT: 6,319

THOMPSON RUN RD

Good

Over: PINE CREEK SOUTH

PS01 PINE CREEK, SOUTH BR, Allegheny, PA

Built 2012 Load: 32.7 t ADT: 16,520

Malabar Drive

Good

Over: Abers Creek

200' W Pine Valley Dr, Allegheny, PA

Built 1995 Load: 32.7 t ADT: 250

SR 1013

Good

Over: PA TPK (I-76)

Near Dorseyville, Allegheny, PA

Built 2015 Load: 33.0 t ADT: 4,773

SR 4070

Good

Over: PA TPK (I-76)

East of Butler Valley Int, Allegheny, PA

Built 2013 Load: 33.4 t ADT: 4,546

GUYS RUN RD

Good

Over: GUYS RUN

1/2 MI. N. of SR 28, Allegheny, PA

Built 2016 Load: 33.4 t ADT: 3,661

MORROW RD (SR3008)

Good

Over: MCLAUGHLIN RUN

200'W.OF INTER.W/SR 3004, Allegheny, PA

Built 2017 Load: 33.4 t ADT: 2,862

Brownsville Rd Ext

Good

Over: Piney Fork

South Park, Allegheny, PA

Built 2008 Load: 33.6 t ADT: 5,069

PANGBURN HOLLOW RD

Good

Over: PERRY MILL RUN

PG05 PANGBURN HOLLOW #5, Allegheny, PA

Built 2012 Load: 33.7 t ADT: 633

PA TPK (I-76)

Good

Over: Deer Creek

W. of Allegheny Val. int., Allegheny, PA

Built 2016 Load: 33.7 t ADT: 33,531

FREEPORT RD

Good

Over: BAILEY RUN

NEAR BAILEY RUN ROAD, Allegheny, PA

Built 2019 Load: 33.7 t ADT: 9,142

GIBSONIA RD

Good

Over: W. BRANCH OF DEER CREEK

1 MILE EAST OF RT 8 INT, Allegheny, PA

Built 2018 Load: 34.3 t ADT: 9,313

Freeport Road

Good

Over: Squaw Run

1/2 mi. S of SR 1002, Allegheny, PA

Built 2018 Load: 34.3 t ADT: 10,555

Wetzel Road

Good

Over: Little Pine Creek

250'W.OF SR 4006, Allegheny, PA

Built 2020 Load: 34.3 t ADT: 4,805

COULTERVILLE RD

Good

Over: Long Run

LG03 LONG RUN NO. 3, Allegheny, PA

Built 2022 Load: 34.3 t ADT: 9,886

SHERIDAN STREET

Good

Over: GIRTYS RUN

445011 SHERIDAN STREET, Allegheny, PA

Built 1998 Load: 34.5 t ADT: 500

Library Road

Good

Over: Piney Fork Creek

50' South of SR 3004, Allegheny, PA

Built 2020 Load: 34.7 t ADT: 13,254

Russellton-Dorsey

Good

Over: Cunningham Run

15' E of Int. w/ SR 1013, Allegheny, PA

Built 2017 Load: 34.7 t ADT: 1,525

NOBLESTOWN ROAD

Good

Over: BRANCH ROBINSON RUN

1 MI.N.E./WASH.CO.LINE, Allegheny, PA

Built 2019 Load: 34.7 t ADT: 3,098

MCLAUGHLIN RUN RD

Good

Over: MCLAUGHLIN RUN

1/2 MI. S.E. OF SR 50, Allegheny, PA

Built 2011 Load: 35.0 t ADT: 5,590

Library Road

Good

Over: Br. Piney Fork Creek

200' North of SR 3004, Allegheny, PA

Built 2021 Load: 35.0 t ADT: 10,129

PA TPK 0576

Good

Over: SR 50, Millers Road

South Fayette Twp, Allegheny, PA

Built 2017 Load: 35.3 t ADT: 10,538

PA TPK 0576

Good

Over: SR 50, Millers Road

South Fayette Twp, Allegheny, PA

Built 2017 Load: 35.3 t ADT: 10,538

MYERS DRIVE

Good

Over: PUCKETA CREEK

250'NORTH OF SR 0366, Allegheny, PA

Built 2005 Load: 35.4 t ADT: 1,407

STREETS RUN ROAD

Good

Over: STREETS RUN

50'NORTH/BRENTWOOD RD., Allegheny, PA

Built 2015 Load: 35.6 t ADT: 9,788

Thompson Run Road

Good

Over: Thompson Run

2656' N.E. OF SR 2053, Allegheny, PA

Built 2016 Load: 35.6 t ADT: 884

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

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