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:

SR 28 SB

Over: RT 8 NB/SB, RT 8 RMPS

ETNA INTERCHANGE SB, Allegheny, PA

Built 1960 ADT: 3,725

FREEPORT RD

Over: S.OAKHILL Rd.& SQUAW RUN

AT BLAWNOX INTERCHANGE, Allegheny, PA

Built 1965 ADT: 1,000

FREEPORT RD

Over: S.OAKHILL DR.& SQUAW RUN

600'N.OF FOX CHAPEL RD., Allegheny, PA

Built 1965 ADT: 200

SR 0030 EB WB

Over: OVER BESSEMER AVE

RT 30 OVER BESSEMER AVE, Allegheny, PA

Built 1937 ADT: 1,000

RAYMOND P SHAFE HW

Over: RED MUD HOLLOW RD

1 MI.NORTH OF SR4022, Allegheny, PA

Built 1970 ADT: 1,297

PARKWAY EAST

Over: BRADDOCK AVE

PARKWAY EAST-BRADDOCK AVE, Allegheny, PA

Built 1951 ADT: 10,000

CROSSTOWN BLVD

Over: FIFTH AVE

I579 SB.OVER 5TH AVENUE, Allegheny, PA

Built 1962 ADT: 5,678

I-579 NB

Over: SR28, 8108,EAST OHIO ST.

Vets Bridge N. Appr, Allegheny, PA

Built 1988 ADT: 16,204

MIFFLIN ROAD

Over: GLASS RUN ROAD

AT GLENWOOD INTERCHANGE, Allegheny, PA

Built 1963 ADT: 3,319

MIFFLIN RD

Over: SR 8059

AT GLENWOOD INTERCHANGE, Allegheny, PA

Built 1967 ADT: 3,590

MIFFLIN RD

Over: SR 8059(RAMP A)

GLENWOOD INTERCHANGE, Allegheny, PA

Built 1967 ADT: 5,114

BLVD ALLIES WB

Over: FORBES, BIRM E&F, BRADY

Birmingham Bridge, Allegheny, PA

Built 1928 ADT: 9,850

STUBENVILLE PIKE

Over: RT 22

STUEBENVILLE PIKE O/TR 22, Allegheny, PA

Built 1964 ADT: 11,072

WEXFORD RUN RD

Over: SR 0079 NB SB

WEXFORD RUN ROAD, Allegheny, PA

Built 1974 ADT: 38,645

CALIFORNIA AVENUE

Over: FARRAGUT ST, JACKS RUN

JA01 JACKS RUN NO 1, Allegheny, PA

Built 1925 ADT: 100

TENTH STREET BR

Over: I-376 AND CSX RR

MA11 SOUTH 10TH ST BRDG, Allegheny, PA

Built 1933 ADT: 33,352

OAKWOOD RD

Over: PENSDALE ST,OAKWOOD RUN

OK03 OAKWOOD RUN NO. 3, Allegheny, PA

Built 1984 ADT: 50

CALIFORNIA AV

Over: SPRUCE RUN RD,SPRUCE RUN

P50008 AVALON BRDG-PT12, Allegheny, PA

Built 1994 ADT: 50

CENTER AV

Over: CAMP HORNE RD,LOWRIES RN

P50004 EMSWORTH - PT05, Allegheny, PA

Built 1973 ADT: 50

RIDGEWOOD AV

Over: CENTER AVENUE

474001 OVER CENTER AVE, Allegheny, PA

Built 1940 ADT: 1,000

RAMP F RD

Over: BALDWIN RD {6014-02}

PARKWAY RAMP TO I79 N.B., Allegheny, PA

Built 1971 ADT: 4,000

RAMP D

Over: RODI RD NB

RAMP D OVER RODI RD.N.B., Allegheny, PA

Built 1962 ADT: 3,248

RAMP H RD

Over: RAMPS C,K,& D

Fort Duquesne Bridge, Allegheny, PA

Built 1968 ADT: 2,846

RAMP C

Over: RAMP F

Fort Pitt Bridge, Allegheny, PA

Built 1967 ADT: 256

RAMP E

Over: SR 0837

Elizabeth Bridge, Allegheny, PA

Built 1947 ADT: 9,655

RAMP E

Over: BANKSVILLE RD

RAMP TO SR 0019 NB, Allegheny, PA

Built 1959 ADT: 16,856

RAMP G

Over: MADISON,NORFOLKSOUTH RR

Veterans Bridge, Allegheny, PA

Built 1988 ADT: 4,417

STATION ST

Over: CRENNELL AVE;BY PAT BSWY

421002 NEXT TO PAT BUSWAY, Allegheny, PA

Built 1997 ADT: 1,000

EAST PROSPECT AV

Over: PAT WEST BUSWAY

P50011 50' E/INGRAM AVE, Allegheny, PA

EWING RD

Over: BUSINESS 376, SR 3160

EWING ROAD OVER OLD SR 60, Allegheny, PA

Built 1998 ADT: 19,534

SAW MILL RUN BLVD

Over: W LIBERTY AVE. SR 3069

0.1 MILE S.LIBERTY TUNNEL, Allegheny, PA

Built 1999 ADT: 21,626

RAMP E SR 8151

Over: RAMP C

.1 MILE S. LIBERTY TUNNEL, Allegheny, PA

Built 1999 ADT: 1,920

RAMP D to SR 65 SB

Over: CHATEAU ST. N&S RR

SR 65 Marshall Ave. Inter, Allegheny, PA

Built 1972 ADT: 6,000

PERRY HY

Over: SR 910

SR 19 OVER SR 910, Allegheny, PA

Built 2002 ADT: 11,206

FREEPORT ROAD

Over: SR 79 NB-SB TPK RAMPS

1000 FT EAST OF SR 0019, Allegheny, PA

Built 2003 ADT: 4,629

INTERNATIONAL DR

Over: BUSINESS 376, SR 3160

1 MILE S. OF 3089 INTCH, Allegheny, PA

Built 2003 ADT: 5,604

PA TPK (TOLL 43)

Over: SR 3017

2.5MI.N. OF FINLEYVILLE I, Allegheny, PA

Built 2002 ADT: 3,742

PA TPK (TOLL 43)

Over: SR 3017

2.5MI.N. OF FINLEYVILLE I, Allegheny, PA

Built 2002 ADT: 3,742

PA TPK (TOLL 43)

Over: SR0051,PETERS CK,W&LE RR

RAMP W OVER SR0051, Allegheny, PA

PA TPK (TOLL 43)

Over: PETERS CR RD, SR0051

RAMP X OVER SR 0051, Allegheny, PA

Built 2002 ADT: 10,539

PA TPK (TOLL 43)

Over: SR 0051

RAMP OVER SR 0051, Allegheny, PA

Built 2002 ADT: 10,539

SR 0279 SB

Over: VARIOUS CITY STREETS

Fort Duquesne Bridge, Allegheny, PA

Built 1985 ADT: 1

PGH MILLS BLVD

Over: SR 0028 NB SB

PGH MILLS MALL, Allegheny, PA

Built 2005 ADT: 20,245

RIDGE ROAD

Over: SR 0376 EB WB

SETTLERS CABIN INTERCHANG, Allegheny, PA

Built 2005 ADT: 35,877

STEEN RD

Over: SR 0079 NB SB

STEEN RD OVER I-79, Allegheny, PA

Built 2005 ADT: 35,339

RAMP MT-B

Over: TURNPIKE ON RAMP(RAMP E)

AIRPORT RAMP FROM SR 60 S, Allegheny, PA

Built 2005 ADT: 356

PA TPK (I-576)

Over: POTATO GARDEN RD, RUN

FINDLAY, Allegheny, PA

Built 2006 ADT: 1,084

PA TPK (I-576)

Over: SR3071, POTATO GARD RUN

FINDLAY, Allegheny, PA

Built 2004 ADT: 1,084

PA TPK (I-576)

Over: SR 0030

FINDLAY, Allegheny, PA

Built 2006 ADT: 1,429

PA TPK (I-576)

Over: SR 0030

FINDLAY, Allegheny, PA

Built 2006 ADT: 1,429

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 5, 2026