Allegheny County, PA

356 public highway bridges

Allegheny County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Allegheny County, Pennsylvania contains 356 public highway bridges. Roughly 48.9% are rated “Good,” 21.3% “Fair,” and 4.5% “Poor.” Poor means the lowest applicable deck, superstructure, substructure, or culvert rating is 4 or below on the 0–9 NBI scale. It is a condition category, not a live safety or closure decision.

Responsible agencies inspect covered bridges on risk-based intervals under current NBIS rules and submit inventory data to FHWA annually. The list below shows every NBI-tracked bridge in the county. Use the “Sort by” controls to change the ordering, and click any row for its reported inspection date, traffic count, and condition fields.

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

356
Total Bridges
48.9%
Good
21.3%
Fair
4.5%
Poor Condition

Condition Distribution

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

All Bridges (356)

CURRY HOLLOW RD

Good

Over: CSX OWNED

PLEASANT HILLS-OVER RR, Allegheny, PA

Built 2012 Load: 39.9 t ADT: 24,259

WEST SMITHFIELD ST

Good

Over: TRIB TO YOUGH RIVER

2082 FEET SW OF SR 48, Allegheny, PA

Built 2016 Load: 40.2 t ADT: 1,273

S 27th Street

Good

Over: CSX Railroad Tunnel

0.2 MI NW of Hot Metal Br, Allegheny, PA

Built 2002 Load: 40.2 t ADT: 1,500

PA TPK (I-76)

Good

Over: PA TPK (Ramp BC)

Allegheny Valley Interch, Allegheny, PA

Built 2011 Load: 40.5 t ADT: 46,240

RAMP D

Good

Over: ADJ TO NORFOLK SOUTHERN

31ST ST/RT 28 RAMP D, Allegheny, PA

Built 2013 Load: 40.5 t ADT: 2,416

GIBSONIA RD

Good

Over: DEER CREEK

250' SOUTH OF SR 1020, Allegheny, PA

Built 2017 Load: 40.5 t ADT: 3,925

SAXONBURG BLVD

Good

Over: LITTLE PINE CREEK

4283' N.E. OF SR 0008, Allegheny, PA

Built 2017 Load: 40.5 t ADT: 3,085

G. BUENA VISTA RD

Good

Over: WILDCAT RUN

AT ROCK RUN RD, Allegheny, PA

Built 2018 Load: 40.5 t ADT: 1,847

BIG SEWICKLEY C RD

Good

Over: BR.BIG SEWICKLEY CREEK

@ INTERSECTION W/SR 4040, Allegheny, PA

Built 1926 Load: 40.8 t ADT: 6,950

SR 28 SB

Good

Over: CSX (AVRR)

500' S of Etna interchng, Allegheny, PA

Built 2009 Load: 40.8 t ADT: 30,365

BULL CREEK RD

Good

Over: BULL CREEK

4200' S.E. OF SR 1033, Allegheny, PA

Built 2015 Load: 40.8 t ADT: 2,964

Dambach Ave

Good

Over: Breakneck Creek

200' N Int w/ Valencia Rd, Allegheny, PA

Built 2013 Load: 40.8 t ADT: 100

Bg Swkly Crk Rd

Good

Over: Big Sewickley Creek

0.6 Mi. NW of SR 4045, Allegheny, PA

Built 2020 Load: 40.8 t ADT: 5,239

Mill Hill Rd

Good

Over: Wylie Run

@ INTER. WITH SR 2010, Allegheny, PA

Built 2016 Load: 41.1 t ADT: 1,592

LINCOLN HWY(US 30)

Good

Over: Montour Run

400 FEET SE OF SR 3070, Allegheny, PA

Built 2016 Load: 41.5 t ADT: 5,934

Lincoln Hwy

Good

Over: LONG RUN

1260' East of Rte 48, Allegheny, PA

Built 2010 Load: 41.7 t ADT: 14,106

MILL ST

Good

Over: ROBINSON RUN SOUTH BRANC

RS03 ROBINSON RUNSBR #3, Allegheny, PA

Built 2022 Load: 41.7 t ADT: 323

Lebanon Rd.

Good

Over: Union RR

2000' N. OF AIRPORT RUNWA, Allegheny, PA

Built 2014 Load: 41.8 t ADT: 18,569

SOUTH BEND LANE

Good

Over: CHALFONT RUN

500' SO. OF BUS. RT.22, Allegheny, PA

Built 2020 Load: 41.8 t ADT: 1,407

Brodhead Rd

Good

Over: Flaugherty Run

@ Interchange w/ SR 3089, Allegheny, PA

Built 2012 Load: 42.1 t ADT: 6,100

Lesnett Road

Good

Over: McLaughlin Run

100' W of Int. w/ SR 3004, Allegheny, PA

Built 2017 Load: 42.1 t ADT: 8,079

PA TPK (I-76)

Good

Over: SR 4052, LR 02225

East of Warrendale, Allegheny, PA

Built 2012 Load: 42.4 t ADT: 31,140

10TH ST BYPASS

Good

Over: PEDESTRIAN WALKWAY

149 Fort Duquesne Blvd Br, Allegheny, PA

Built 2002 Load: 42.6 t ADT: 23,748

Bakerstown Road

Good

Over: B&LE RR

@ INTERSECTION W/ SR 1013, Allegheny, PA

Built 2016 Load: 43.1 t ADT: 5,371

SAW MILL RUN BLVD

Good

Over: WEYMAN RUN

250' SOUTHEAST OF SR 0088, Allegheny, PA

Built 2015 Load: 43.4 t ADT: 28,859

East Pennview St.

Good

Over: Pine Creek

PI11 Pine Creek #11, Allegheny, PA

Built 2017 Load: 43.4 t ADT: 4,234

MCFARREN ST.

Good

Over: Nine Mile Run

094 MCFARREN ST BRIDGE, Allegheny, PA

Built 2020 Load: 43.4 t ADT: 150

RAMP T

Good

Over: ELDER ST, TURTLE CRK, RR

TriBoro Expressway, Allegheny, PA

Built 2013 Load: 43.7 t ADT: 3,181

Thorn Hill Dr.

Good

Over: Brush Creek

BH03 Brush Creek No. 3, Allegheny, PA

Built 2015 Load: 43.7 t ADT: 2,764

Brownshill Road

Good

Over: Little Pine Creek

112001 O'HARA TWP, Allegheny, PA

Built 2019 Load: 43.7 t ADT: 1,765

Log Cabin Rd

Good

Over: Little Deer Creek

70' West of SR 1015, Allegheny, PA

Built 2015 Load: 44.4 t ADT: 433

Mosside Blvd

Good

Over: NORFOLKSOUTH, TURTLE CRK

W of Pitcarin@SR 130 Int, Allegheny, PA

Built 2007 Load: 44.5 t ADT: 8,021

S. LINDEN ST.

Good

Over: N-S RR

FO02 Duquesne Flyover, Allegheny, PA

Built 2009 Load: 44.5 t ADT: 434

DORRINGTON RD

Good

Over: ROBINSON RUN

.25 MI S. OF SR3048, Allegheny, PA

Built 2010 Load: 44.5 t ADT: 837

HAYDEN BLVD (SR51)

Good

Over: FALLEN TIMBER RUN

@ INTER.W/WEIGLE HILL RD., Allegheny, PA

Built 2018 Load: 45.0 t ADT: 18,567

HOPE HOLLOW RD

Good

Over: GEORGES RUN

GR01 GEORGE'S RUN NO. 1, Allegheny, PA

Built 1930 Load: 45.4 t ADT: 10,819

CENTER ST

Good

Over: PAT BR LOC 9054

439001 N/OXBOW/SMILAX ST, Allegheny, PA

Built 1996 Load: 45.4 t ADT: 2,363

RELOCATED FT PITT

Good

Over: MON WHARF FLOOD WALLS

150 Fort Pitt Blvd (Wood, Allegheny, PA

Built 2002 Load: 45.4 t ADT: 13,800

OAK RD

Good

Over: DAWSON RUN

1/2 MILE FR TR 910, Allegheny, PA

Built 2012 Load: 45.4 t ADT: 6,102

Library Rd.

Good

Over: Weyman Run

SR51 and 88 Intersection, Allegheny, PA

Built 2015 Load: 45.4 t ADT: 21,171

RAMP 79S_576E

Good

Over: PA TPK (0576)

South Fayette Twp, Allegheny, PA

Built 2020 Load: 45.7 t

HERRON AV

Good

Over: LOWRIES RUN

75' S OF RT 65, Allegheny, PA

Built 2013 Load: 46.0 t ADT: 1,000

SR 2055

Good

Over: Pa Turnpike I-76

NEAR BOYCE PARK, Allegheny, PA

Built 2022 Load: 46.0 t ADT: 4,040

SR 48 SB

Good

Over: N & S RR, Turtle Creek

South of SR 130 Intersect, Allegheny, PA

Built 2006 Load: 46.3 t ADT: 8,021

Idlewood Avenue

Good

Over: Whiskey Run

Idlewood Avenue, Allegheny, PA

Built 2018 Load: 46.3 t ADT: 175

Ohio River Blvd

Good

Over: Lowries Run

Emsworth Boro, Allegheny, PA

Built 2011 Load: 46.7 t ADT: 21,180

GIBSON ST

Good

Over: LOWRIES RUN

429003 OFFCAMP HORNE RD E, Allegheny, PA

Built 2015 Load: 46.7 t ADT: 100

Lardington Road

Good

Over: Bull Creek

350' N OF SR 1034, Allegheny, PA

Built 2019 Load: 46.7 t ADT: 569

FLAUGHERTY RUN RD

Good

Over: FLAUGHERTY RUN

2 MI NE OF SR 60, Allegheny, PA

Built 2009 Load: 47.2 t ADT: 7,401

Calmwood Drive

Good

Over: East Little Pine Creek

1.3 Mi. SW of Glenshaw, Allegheny, PA

Built 2010 Load: 47.2 t ADT: 100

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

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Data sourced from official public datasets. See our methodology for details. Retrieved and formatted by PlainBridges

Every figure on PlainBridge is rendered directly from federal source data, no number is typed in by an editor. This page draws directly on federal source data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.