King County, WA

1,364 public highway bridges

King County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, King County, Washington contains 1,364 public highway bridges. Roughly 31% are rated “Good,” 33.4% “Fair,” and 3.3% “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.

1,364
Total Bridges
31%
Good
33.4%
Fair
3.3%
Poor Condition

Condition Distribution

Good
31% (423)
Fair
33.4% (456)
Poor
3.3% (45)

All Bridges (1,364)

HARBOR AVE SW

Fair

Over: RR

SW Spokane St & Admiral, King, WA

Built 2001 Load: 31.8 t ADT: 9,546

WOODINVILLE DUVALL

Fair

Over: DUVALL SLOUGH

0.6 MI W OF SR-203, King, WA

Built 1948 Load: 32.1 t ADT: 10,564

SNOQUALMIE RVR RD

Fair

Over: PATTERSON CREEK

0.8 MI N OF SR-202, King, WA

Built 1969 Load: 32.4 t ADT: 798

252ND AVE SE

Fair

Over: BOISE CREEK

0.1 S OF SR-410, King, WA

Built 1963 Load: 32.4 t ADT: 650

NE 18TH ST

Fair

Over: DRAINAGE DITCH

1.6 MI W OF SR-203, King, WA

Built 1965 Load: 32.4 t ADT: 798

218TH AVE NE

Fair

Over: COLIN CREEK

1 MI EAST OF AVONDALE, King, WA

Built 1984 Load: 32.4 t ADT: 2,300

SR 203

Fair

Over: SLOUGH

1.1 N JCT SR 202, King, WA

Built 1945 Load: 32.7 t ADT: 7,622

SR 203

Fair

Over: SLOUGH

16.2 N JCT SR 202, King, WA

Built 1945 Load: 32.7 t ADT: 10,190

I-5

Fair

Over: TERRAIN

5.5 N JCT SR 900, King, WA

Built 1967 Load: 32.7 t ADT: 5,638

SR 520

Fair

Over: 116TH AVE NE

0.1 E JCT I-405, King, WA

Built 1966 Load: 32.7 t ADT: 43,146

SR 599

Fair

Over: 133RD ST

0.3 N JCT I-5, King, WA

Built 1966 Load: 32.7 t ADT: 22,020

I-405

Fair

Over: NE 132ND ST

6.1 N JCT SR 520, King, WA

Built 1970 Load: 32.7 t ADT: 63,798

187 AVE SE

Fair

Over: LEWIS CREEK

0.7 MI N OF I-90, King, WA

Built 1986 Load: 32.7 t ADT: 205

CEDAR GROVE RD

Fair

Over: ISSAQUAH CREEK

2 MI E OF SR-169, King, WA

Built 1962 Load: 32.7 t ADT: 4,568

SW SPOKANE ST

Fair

Over: DUWAMISH RIVER E WATERWY

800 SW Spokane St, King, WA

Built 1976 Load: 32.7 t ADT: 8,800

SW SPOKANE ST

Fair

Over: E MARGINAL WAY S

1200 SW Spokane St, King, WA

Built 1983 Load: 32.7 t ADT: 10,000

LEARY WAY

Fair

Over: SAMMAMISH RIVER

0.4 MILES S JCT SR 908, King, WA

Built 1992 Load: 32.7 t ADT: 30,000

SE 216TH WAY

Fair

Over: CEDAR RIVER TRAIL

0.05 MI E OF SR-169, King, WA

Built 1994 Load: 32.7 t ADT: 6,082

EB I-90

Fair

Over: OLALLIE CREEK

18.2 E JCT SR 202, King, WA

Built 1972 Load: 32.7 t ADT: 18,185

GORGE POWERHOUSE R

Fair

Over: SKAGIT RIVER

Gorge Powerhouse, King, WA

Built 1937 Load: 32.7 t ADT: 145

DIABLO ACCESS RD

Fair

Over: WINDY CREEK

Diable Access Bridge, King, WA

Built 1955 Load: 32.7 t ADT: 40

ROSS DAM ROAD

Fair

Over: SKAGIT RIVER

Ross Dam, King, WA

Built 1940 Load: 32.7 t ADT: 5

ROSS DAM ROAD

Fair

Over: SKAGIT RIVER

Ross Dam, King, WA

Built 1940 Load: 32.7 t ADT: 5

KLICKITAT DRIVE

Fair

Over: SB SOUTHCENTER PKWY

AT SOUTHCENTER PARKWAY, King, WA

Built 2012 Load: 32.7 t ADT: 14,024

SR 520 RAMP

Fair

Over: PORTAGE BAY

0.8 E JCT I-5, King, WA

Built 1963 Load: 33.4 t ADT: 11,169

LIND AVE SW

Fair

Over: P9 CHANNEL/PANTHER CREEK

0.6 MI S OF I-405, King, WA

Built 1981 Load: 33.4 t ADT: 8,345

SR 18

Fair

Over: KENT-BLACK DIAMOND RD SE

6.2 E JCT SR 164, King, WA

Built 1959 Load: 33.6 t ADT: 25,223

I-5 REV EXP LANES

Fair

Over: RAVENNA BLVD

5.8 N JCT I-90, King, WA

Built 1961 Load: 33.6 t ADT: 34,322

I-5

Fair

Over: S 288TH ST

3.8 N JCT SR 18, King, WA

Built 1961 Load: 33.6 t ADT: 94,670

I-5 SBCD

Fair

Over: KING JACKSON ST

0.3 N JCT I-90, King, WA

Built 1965 Load: 33.6 t ADT: 66,222

SR 520

Fair

Over: 116TH AVE NE

0.1 E JCT I-405, King, WA

Built 1966 Load: 33.6 t ADT: 43,146

I-405

Fair

Over: BN RR (ABANDONED)

1.3 N JCT I-90, King, WA

Built 1972 Load: 33.6 t ADT: 95,581

I-90

Fair

Over: E FK ISSAQUAH CR

2.7 E JCT SR 900, King, WA

Built 1976 Load: 33.6 t ADT: 33,574

SR 203

Fair

Over: TOLT RIVER

5.3 N JCT SR 202, King, WA

Built 1977 Load: 33.6 t ADT: 10,640

KELLY RD NE

Fair

Over: CHERRY CREEK

5.2 MI E OF SR-203, King, WA

Built 1947 Load: 33.6 t ADT: 1,561

W GARFIELD ST RAMP

Fair

Over: 16TH AVE W

W Garfield St & 23rd Ave, King, WA

Built 1992 Load: 33.6 t ADT: 3,800

W GALER ST

Fair

Over: ELLIOTT AVE W, RR

W Galer St & Elliott Ave, King, WA

Built 2000 Load: 34.0 t ADT: 10,000

I-90

Fair

Over: 424TH AVE SE

1.5 E JCT SR 202, King, WA

Built 1976 Load: 34.3 t ADT: 23,108

I-90

Fair

Over: 424TH AVE SE

1.5 E JCT SR 202, King, WA

Built 1976 Load: 34.3 t ADT: 23,108

SE GREEN VALLEY RD

Fair

Over: BURNS CREEK

4.1 MI E OF SR-18, King, WA

Built 1926 Load: 34.3 t ADT: 1,847

SW SPOKANE ST

Fair

Over: DUWAMISH RIVER W WATERWY

1200 SW Spokane St, King, WA

Built 1983 Load: 34.3 t ADT: 108,179

I-5 RAMP

Fair

Over: PEDESTRIAN PATH

3.1 N JCT I-90, King, WA

Built 1963 Load: 34.5 t ADT: 5,002

I-5

Fair

Over: SB VIADUCT STA 2195

1.2 N JCT I-90, King, WA

Built 1964 Load: 34.5 t ADT: 69,913

SR 599

Fair

Over: 42ND AVE S

0.7 N JCT I-5, King, WA

Built 1968 Load: 34.5 t ADT: 22,020

SR 167

Fair

Over: FIRST AVE N

1.5 N PIERCE CO, King, WA

Built 1977 Load: 34.5 t ADT: 92,898

W GARFIELD ST RAMP

Fair

Over: 16TH AVE W

W Garfield St & 23rd Ave, King, WA

Built 1991 Load: 34.5 t ADT: 4,000

NE 90TH ST

Fair

Over: SAMMAMISH RIVER

0.5 MI W OF SR-202, King, WA

Built 2001 Load: 34.5 t ADT: 17,500

WEST VALLEY HWY

Fair

Over: GREEN RIVER

0.3 MI S OF JCT SR-516, King, WA

Built 1968 Load: 34.7 t ADT: 19,000

SW SPOKANE ST

Fair

Over: W WATERWAY OF DUWAMISH

1200 SW Spokane St, King, WA

Built 1991 Load: 34.7 t ADT: 11,000

LANDSBURG ROAD

Fair

Over: CEDAR RIVER

1.5 MI N KENT KANGL RD, King, WA

Built 1982 Load: 35.0 t ADT: 5,335

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

Related

Browse all → | Rankings →
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.