How many bridges are in Washington?

Washington has 8,808 public highway bridges tracked in the FHWA National Bridge Inventory. View detailed condition data for each bridge on PlainBridges.

What percentage of bridges in Washington are structurally deficient?

4.8% of bridges in Washington are classified as structurally deficient by the FHWA, compared to a national average of 7.0%.

State profile · Below national median SD

Washington bridge safety

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

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

8,808
Public bridges: 42.4%
Good condition: 4.8%
Poor condition: 4.8%
Structurally deficient

Total Bridges

8,808

Public highway bridges in Washington

Good Condition

42.4%

3,734 bridges rated 7-9

-7.6pp vs 50% benchmark

Poor Condition

4.8%

424 bridges rated 0-4

Structurally Deficient

4.8%

424 bridges flagged for repair priority

-2.2pp vs national avg 7.0%

Washington vs national bridge condition

Washington — Good condition share 42.4%

National avg

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

Washington — Structurally deficient share 16.0%

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 — Washington (FHWA NBI)

Washington 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 Washington on the same metric.

California

4.60% top marginal rate

Structure: Progressive
Burden @ $100K: $27,040

Arkansas

4.71% top marginal rate

Structure: Progressive
Burden @ $100K: $5,544

Selected

Washington

4.81% top marginal rate

Structure: Progressive
Burden @ $100K: $8,808

Indiana

4.94% top marginal rate

Structure: Progressive
Burden @ $100K: $18,630

Kansas

5.25% top marginal rate

Structure: Progressive
Burden @ $100K: $23,867

Bridges Needing Most Attention in Washington

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

SILVER CK RD 00670

Structurally Deficient

Over: NINE MILE CREEK

19.05 E SR 21, Ferry, WA

Built 1958 Load: 2.7 t ADT: 47

4TH ST

Poor

Over: MILL CREEK

4TH AND MILL CR, Walla Walla, WA

Built 1908 Load: 2.7 t ADT: 2,624

NO DATA ENTERED

Structurally Deficient

Over: WEST BRANCH LECLERC CREE

NO DATA ENTERED, Pend Oreille, WA

Built 1954 Load: 3.5 t ADT: 5

STEVENS RD. -IRRIG

Poor

Over: DRAIN

00.26 NO CHAMBERS, Yakima, WA

Built 1965 Load: 3.6 t ADT: 68

PEARL HILL RD

Poor

Over: JORDAN CREEK

1.44 E JCT HILAND ORCH RD, Douglas, WA

Built 1953 Load: 4.2 t ADT: 72

FARM ACCESS

Poor

Over: ROZA ID WASTEWAY NO 3

NR PARKER HEIGHTS, WA, Yakima, WA

Built 1955 Load: 4.4 t ADT: 10

All Bridges in Washington

Sort by:

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

Washington vs national bridge condition

Condition Distribution

Counties (39)

Bridges Needing Most Attention in Washington

SILVER CK RD 00670

4TH ST

NO DATA ENTERED

STEVENS RD. -IRRIG

PEARL HILL RD

FARM ACCESS

All Bridges in Washington

NP RY

228TH ST SW

I-5 SB TO SR 99 SB

SR 99

I-5

I-5

SR 524

BICKFORD AVE

236TH ST SW

SR 530

US 2

I-5

I-5

I-5

I-5

I-5

I-5

N-E RAMP

75TH ST SE

US 2

US 2 WB

I-5

I-5

SR 529 SPUR

23RD ST

41ST ST

US 2

12TH ST NE

I-5

I-5

SR 527

I-5

I-5

I-5

S-E RAMP

PED BEVERLY LANE

EVERGREEN WAY

200TH ST NE

STIMSON RD

N-W RAMP P1 18853

BROADWAY AVE

BROADWAY

I-5

SR 522

I-5

TULALIP RR

5TH AVE

236TH ST NE

SR 99

SR 9

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