How many bridges are in Pennsylvania?

Pennsylvania has 14,867 public highway bridges tracked in the FHWA National Bridge Inventory. View detailed condition data for each bridge on PlainBridges.

What percentage of bridges in Pennsylvania are structurally deficient?

10.5% of bridges in Pennsylvania are classified as structurally deficient by the FHWA, compared to a national average of 7.0%.

State profile · Above national median SD

Pennsylvania bridge safety

Condition ratings, load ratings, and structural-deficiency data for every public highway bridge in Pennsylvania — drawn straight from the FHWA National Bridge Inventory.

Reviewed byPlainbridges Editorial, Plain Bridges Editorial Team · June 7, 2026

14,867
Public bridges: 37.4%
Good condition: 10.5%
Poor condition: 10.5%
Structurally deficient

Total Bridges

14,867

Public highway bridges in Pennsylvania

Good Condition

37.4%

5,564 bridges rated 7-9

-12.6pp vs 50% benchmark

Poor Condition

10.5%

1,561 bridges rated 0-4

Structurally Deficient

10.5%

1,561 bridges flagged for repair priority

3.5pp vs national avg 7.0%

Pennsylvania vs national bridge condition

Pennsylvania — Good condition share 37.4%

National avg

Share of bridges rated 7-9 on the FHWA 0-9 scale (deck, superstructure, substructure all good).

Pennsylvania — Structurally deficient share 35.0%

National avg

Lower is better. Bar maxes at 30% (worst-state ceiling). National average sits at 7.0%.

Condition Distribution

Bridge inventory deck-condition mix — Pennsylvania (FHWA NBI)

Counties (67)

Adams 94 Allegheny 356 Armstrong 109 Beaver 84 Bedford 99 Berks 187 Blair 83 Bradford 114 Bucks 184 Butler 142 Cambria 67 Cameron 21 Carbon 29 Centre 183 Chester 285 Clarion 119 Clearfield 195 Clinton 147 Columbia 187 Crawford 263 Cumberland 239 Dauphin 283 Delaware 269 Elk 95 Erie 331 Fayette 341 Forest 51 Franklin 215 Fulton 97 Greene 209 Huntingdon 162 Indiana 214 Jefferson 140 Juniata 109 Lackawanna 212 Lancaster 509 Lawrence 162 Lebanon 221 Lehigh 255 Luzerne 307 Lycoming 301 McKean 166 Mercer 273 Mifflin 129 Monroe 214 Montgomery 608 Montour 74 Northampton 253 Northumberland 193 Perry 102 Philadelphia 584 Pike 108 Potter 145 Schuylkill 199 Snyder 106 Somerset 400 Sullivan 119 Susquehanna 284 Tioga 429 Union 163 Venango 189 Warren 217 Washington 655 Wayne 259 Westmoreland 619 Wyoming 140 York 569

Pennsylvania vs nearby ranks

Adjacent states on the structurally deficient leaderboard (lower share = better)

States are ranked by share of bridges flagged structurally deficient — the FHWA classification for any span where deck, superstructure, or substructure carries a condition rating of 4 or below. Lower percentages indicate stronger maintenance funding and inspection follow-through. States here sit immediately above and below Pennsylvania on the same metric.

Michigan

8.92% top marginal rate

Structure: Progressive
Burden @ $100K: $1,188

Alaska

10.12% top marginal rate

Structure: Progressive
Burden @ $100K: $909

Selected

Pennsylvania

10.50% top marginal rate

Structure: Progressive
Burden @ $100K: $14,867

North Dakota

10.84% top marginal rate

Structure: Progressive
Burden @ $100K: $4,242

Louisiana

11.00% top marginal rate

Structure: Progressive
Burden @ $100K: $12,699

Bridges Needing Most Attention in Pennsylvania

Six lowest-condition bridges in Pennsylvania, ranked by composite NBI rating. Each is inspected at least every 24 months.

SR0286

Poor

Over: KISKIMINETAS RIVER

SALTSBURG, Indiana, PA

Built 1985 Load: 0.9 t ADT: 4,169

T-783 HARRIS HILL

Structurally Deficient

Over: TOBYS CREEK

100 FT NE OF SR 309, Luzerne, PA

Built 1920 Load: 0.9 t ADT: 220

BRIDGE 2805,T-303

Structurally Deficient

Over: OVER SHENANGO RIVER TRIB

HEASLEY RD SHENANGO TWP, Mercer, PA

Built 1922 Load: 0.9 t ADT: 89

SR 3014

Poor

Over: LAUREL HILL CREEK

BARRONVALE, Somerset, PA

Built 1962 Load: 0.9 t ADT: 167

Clark Street

Structurally Deficient

Over: Fallen Timber Run

Clark St, Hooversville, Somerset, PA

Built 1910 Load: 0.9 t ADT: 100

SR 4012

Structurally Deficient

Over: LOYALSOCK CREEK

BORO OF FORKSVILLE, Sullivan, PA

Built 1850 Load: 0.9 t ADT: 137

All Bridges in Pennsylvania

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Publisher	Kiznis Studio
Sources	FHWA National Bridge Inventory, public U.S. government datasets

Pennsylvania vs national bridge condition

Condition Distribution

Counties (67)

Bridges Needing Most Attention in Pennsylvania

SR0286

T-783 HARRIS HILL

BRIDGE 2805,T-303

SR 3014

Clark Street

SR 4012

All Bridges in Pennsylvania

PA 33(LR 796)

PA 33 (LR 796)

I-78 EB (LR 1045)

I-78 WB (LR 1045)

I-78 EB (LR 1045)

I-78EB(LR 1045)

I-78 EB (LR 1045)

I-78EB(LR 1045)

I-78EB(LR 1045)

I-78 E.B.(LR 1045)

I-78 W.B.(LR 1045)

SR 78EB(LR 1045)

SR 78WB(LR 1045)

SR 2012 (LR 48010)

SR 2016(LR 48121)

SR 2017 (LR 48019)

SR 2028 (LR 48017)

SR 2028 (LR 48017)

SR 2028 (LR 48018)

SR 3004(LR 48118)

SR 3011 (LR 48096)

BROAD STREET

US 22

US 22

PA 611-NJ 94 CONN.

PA 145

I-78 WB (LR 1045)

I-78 WB (LR 1045)

I-78 EB (LR 1045)

PA 33 NB

PA 33 SB

PA 33 NB

PA 33 SB

SR 2018

I-78 WB

I-78 EB

SR 1002 (LR 48025)

SR 33 (LR 1098NB)

SR 33 (LR 1098SB)

SR 61

I-80 EB

I-80 WB

SR I-80 EBL

SR 147

TR 147

T-666

I-180 EBL

I-180 WBL

SR 0180 EB

SR 0180 WB

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