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)

Sort:

PA TPK (I-576)

Over: SR 60, RAMPS C, MT-B, KL

FINDLAY TWP, Allegheny, PA

Built 2006 ADT: 19,916

PA TPK (I-576)

Over: SR 376, RAMPS, RD, STRM

FINDLAY, Allegheny, PA

PA TPK (I-576)

Over: SR 0060, RAMPS, RD, STRM

FINDLAY, Allegheny, PA

Built 2006 ADT: 4,073

Hulton Rd

Over: Turnpike, B&LE RR

Beside Oakmont Golf Club, Allegheny, PA

Built 2007 ADT: 1

FRANKLIN ROAD

Over: PA TURNPIKE

500 FT N OF WARRENDALE RD, Allegheny, PA

Built 2006 ADT: 999

Rochester Road

Over: SR 0079 NB SB

NEAR I-79-I-279 JUNCTION, Allegheny, PA

Built 2007 ADT: 21,278

First Street

Over: SR 65 N-S RR

Mike Maruca Memorial Br, Allegheny, PA

Built 2007 ADT: 8,792

OLD NORTHERN PIKE

Over: SR 2048 (BUSINESS RT. 22

150'N.OF MONROEVILLE BLVD, Allegheny, PA

Built 2007 ADT: 10,975

28-279 CONNECTOR

Over: SR 279 AND MADISON AVE

NORTH SIDE, Allegheny, PA

Built 2008 ADT: 638

SR 8009 RAMP G

Over: I-79,376E&W, CAMBLS RNRD

79/376 INTERCHANGE, Allegheny, PA

Built 2008 ADT: 4,990

SR 8009 RAMP H

Over: CAMPBELL RUN RD AND RUN

79/376 INTERCHANGE, Allegheny, PA

Built 2008 ADT: 100

GIBSONIA ROAD

Over: PA TURNPIKE

OVER PA TURNPIKE, Allegheny, PA

Built 2008 ADT: 2

BL OF THE ALLIES

Over: FORBES AV, MAURICE ST

1 MILE E OF BIRMINGHAM BR, Allegheny, PA

HIGHLAND PARK APPR

Over: SR 0008

Highland Park Bridge, Allegheny, PA

Built 1940 ADT: 14,090

SR 51 North Bound

Over: SR 837, NSRR, Local Rd.

Elizabeth Bridge, Allegheny, PA

Built 1951 ADT: 9,655

PA TPK (I-576)

Over: McCASLIN RD, ENLOW RUN

FINDLAY, Allegheny, PA

PA TPK (I-576)

Over: T-439 BALD KNOB ROAD

FINDLAY TWP, Allegheny, PA

Built 2006 ADT: 130

PA PTK (I-576), WB

Over: T-439 BALD KNOB ROAD

FINDLAY TWP, Allegheny, PA

Built 2006 ADT: 200

PA TPK (I-576)

Over: MCCASLIN RUN, ENLOW RUN

FINDLAY TWP, Allegheny, PA

PA TPK (I-576)

Over: MCCASLIN RD, ENLOW RUN

FINDLAY TWP, Allegheny, PA

FOREST GROVE RD

Over: SR 0079 NB-SB

M0008 MOON RUN NO. 8, Allegheny, PA

Built 2009 ADT: 22,672

SR 19

Over: SR 60 @ SR 19 INTER

SR 19 OVER S.MAIN ST, Allegheny, PA

Built 2010 ADT: 15,042

SR 0051 SB

Over: SOUTH MAIN STREET

WEST END, Allegheny, PA

Built 2010 ADT: 15,042

GREENSBURG PIKE

Over: LINCOLN HIGHWAY

GREENSBURG PIKE O/ RT 30, Allegheny, PA

Built 2010 ADT: 9,566

PA TPK (I-76) WB

Over: SR1001, N.S., AV. R

Allegheny River, Allegheny, PA

Built 2010 ADT: 7,350

PA TPK (I-76) EB

Over: SR 1001, N.S. & A.V. RR

Allegheny River, Allegheny, PA

Built 2010 ADT: 7,350

KELSO ROAD

Over: SR 22 EB WB

SR 3051 OVER SR 22, Allegheny, PA

Built 2011 ADT: 10,781

MONTOUR CHURCH RD

Over: SR 22

TWP RD 430 OVER SR 22, Allegheny, PA

Built 2011 ADT: 11,043

INTERSTATE 376

Over: BUSINESS RT. 22

NEAR TURNPIKE INT., Allegheny, PA

Built 2011 ADT: 15,041

PA TPK (I-76)

Over: SR 4063, LR 02141

West of Gibsonia, Allegheny, PA

Built 2012 ADT: 4,698

PA TPK (I-76)

Over: SR 4068

East of Warrendale, Allegheny, PA

Built 2012 ADT: 10,514

LINCOLN HIGHWAY

Over: ELECTRIC AVE.

.5 MI.W. WESTINGHOUSE BR., Allegheny, PA

Built 2012 ADT: 2,743

Fancourt Street

Over: Tenth St. Bypass

143 10th St Bypass off Ft, Allegheny, PA

Built 2012 ADT: 10,783

LINCOLN HIGHWAY

Over: SR 2112 ELECTRIC AVE

.5 MI.W.WESTINGHOUSE BR., Allegheny, PA

Built 2013 ADT: 2,743

ECONOMY GRADE ROAD

Over: SR 0376 EB WB

1 MI S Beaver Co. Line, Allegheny, PA

Built 2016 ADT: 16,343

Flaugherty Run Rd.

Over: SR 3160 - Business 376

1 Mi North of Old Airport, Allegheny, PA

Built 2017 ADT: 3,921

Greenfield Ave

Over: I-376 Parkway East

039 Greenfield Bridge, Allegheny, PA

Built 2017 ADT: 42,691

SHALER STREET

Over: SR 19

1/4 MI NW OF I-376, Allegheny, PA

Built 2019 ADT: 13,157

I-376 EB

Over: MON RIVER & WARF, 376 WB

Fort Pitt Bridge, Allegheny, PA

Built 1953 ADT: 52,977

PA TPK (I-76)

Over: SR 0019, US19

WEST OF WARRENDALE, Allegheny, PA

Built 2021 ADT: 11,011

Grant Ave Ext

Over: Thompson Run

At Int. Lwr Bull Run Rd, Allegheny, PA

Built 1985 Load: 19.1 t ADT: 750

Beagle Drive

Over: Alsip Run

217 FT W of SR0088, Allegheny, PA

Built 1970 Load: 19.1 t ADT: 200

Community Center D

Over: W. Branch of Deer Creek

50' S of Int w/ SR910, Allegheny, PA

Built 2004 Load: 19.1 t ADT: 1,000

FORT DUQ BR (LOW)

Over: FT DUQ BRDG NB, ALLEGH R

Fort Duquesne Bridge, Allegheny, PA

Built 1959 Load: 20.9 t ADT: 18,158

SR 65

Over: ABANDONED ROADWAY

North of McKees Rocks Brg, Allegheny, PA

Built 1930 Load: 22.7 t ADT: 28,590

ROCKWOOD DR

Over: SYCAMORE RUN

432005 ROCKWOOD ESTATE BR, Allegheny, PA

Built 1961 Load: 22.7 t ADT: 150

SR 8082 SB

Over: N/A

Highland Park Bridge, Allegheny, PA

Built 1940 Load: 25.4 t ADT: 3,973

SR 8082

Over: N/A

Highland Park Bridge, Allegheny, PA

Built 1940 Load: 25.4 t ADT: 23,641

WALTON ROAD

Over: LOBBS RUN

1050' N.W. OF SR 0837, Allegheny, PA

Built 1962 Load: 26.3 t ADT: 567

NOBLESTOWN RD

Over: OHIO C.,SR3117,ROBINSON

1/2 MI W OF US 0079, Allegheny, PA

Built 1972 Load: 26.3 t ADT: 2,837

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

Reviewed byPlainbridges Editorial, Plain Bridges Editorial Team · June 6, 2026