King County, WA

1,364 public highway bridges

King County Bridge Snapshot

King County, Washington contains 1,364 public highway bridges in the FHWA National Bridge Inventory. Roughly 31% are rated “Good,” 33.4% “Fair,” 3.3% “Poor,” and 3.3% 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 WA 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.

1,364
Total Bridges
31%
Good
3.3%
Poor
3.3%
Structurally Deficient

Condition Distribution

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

All Bridges (1,364)

W-N I-90 RAMP

Good

Over: PEDESTRIAN-BIKE PATH

0.6 E JCT I-5, King, WA

Built 1988 Load: 53.5 t ADT: 7,337

I-90 EB

Good

Over: TALAPUS CREEK

15.6 E JCT SR 202, King, WA

Built 1972 Load: 53.5 t ADT: 18,193

SE 244 ST

Good

Over: SOOS CREEK

2.25 MI N OF SR-516, King, WA

Built 2009 Load: 53.8 t ADT: 4,883

SR 18

Good

Over: CAREY CR TRIB

3.9 E JCT SR 169, King, WA

Built 1996 Load: 54.4 t ADT: 15,143

SR 18

Good

Over: SOOS CREEK

6.7 E JCT SR 164, King, WA

Built 1996 Load: 54.4 t ADT: 25,223

SR 18 RAMP

Good

Over: SOOSETTE CREEK

4.7 E JCT SR 164, King, WA

Built 1997 Load: 54.4 t ADT: 5,784

SR 18

Good

Over: JENKINS CREEK

2.1 E JCT SR 516, King, WA

Built 2002 Load: 54.4 t ADT: 19,491

SR 202

Good

Over: DETENTION VAULT

1.9 E JCT SR 520, King, WA

Built 2007 Load: 54.4 t ADT: 14,392

SR 202

Good

Over: EVANS CREEK

2.4 E JCT SR 520, King, WA

Built 2006 Load: 54.4 t ADT: 29,736

172ND AVE SE

Good

Over: SOOS CREEK

1.7 MI N OF SR-18, King, WA

Built 2009 Load: 54.8 t ADT: 1,150

SE SUMMIT LANDSBUR

Good

Over: ROCK CREEK

0.5 MI N OF SR169, King, WA

Built 2022 Load: 55.1 t ADT: 1,200

Veterans Dr.

Good

Over: GREEN RIVER

2.0 MI E OF I-5, King, WA

Built 2006 Load: 55.4 t ADT: 5,200

SR 202

Good

Over: PATTERSON CRK EAST TRIB

12.0 E JCT SR 520, King, WA

Built 2020 Load: 56.1 t ADT: 12,172

WB SR 18 TO 304TH

Good

Over: SOOSETTE CREEK

4.7 E JCT SR 164, King, WA

Built 1997 Load: 56.2 t ADT: 3,745

E-S RAMP

Good

Over: BUILDING, PARKING LOT

0.2 W JCT I-90, King, WA

Built 2003 Load: 56.2 t ADT: 4,000

SR 18

Good

Over: TAYLOR CREEK

1.4 E JCT SR 169, King, WA

Built 2006 Load: 56.2 t ADT: 16,302

SR 202

Good

Over: EVANS CREEK

1.7 E JCT SR 520, King, WA

Built 2007 Load: 56.2 t ADT: 29,749

SR 202

Good

Over: DETENTION VAULT

2.0 E JCT SR 520, King, WA

Built 2007 Load: 56.2 t ADT: 14,868

SR 509

Good

Over: DES MOINES CK/MEM TRAIL

0.8 N JCT SR 516, King, WA

Built 2007 Load: 56.2 t ADT: 18,248

292ND AVE SE

Good

Over: PATTERSON CREEK

.03 MI S OF SR-202, King, WA

Built 2012 Load: 56.7 t ADT: 7,269

US 2

Good

Over: STREAM

0.7 E SNOHOMISH CO, King, WA

Built 1986 Load: 57.1 t ADT: 5,648

I-5

Good

Over: KLICKITAT DRIVE

5.0 N JCT SR 516, King, WA

Built 1998 Load: 57.1 t ADT: 18,644

US 2

Good

Over: TYE RIVER

14.6 E SNOHOMISH CO, King, WA

Built 1998 Load: 57.1 t ADT: 4,871

284TH AVE. SE

Good

Over: NEWAUKUM CREEK

1.0 MI W OF SR-169, King, WA

Built 2012 Load: 57.1 t ADT: 2,855

NE CARN. FARM RD

Good

Over: SLOUGH

0.6 MI W OF SR-203, King, WA

Built 1997 Load: 57.3 t ADT: 1,259

WOODINVILLE DUVALL

Good

Over: TUCK CREEK

1.9 Mi W of SR-203, King, WA

Built 2023 Load: 57.3 t ADT: 10,500

SR 518

Good

Over: 42ND AVE S

0.4 E JCT SR 99, King, WA

Built 1963 Load: 58.0 t ADT: 60,822

SR 18

Good

Over: CAREY CR TRIB

3.9 E JCT SR 169, King, WA

Built 1995 Load: 58.0 t ADT: 15,143

SR 18

Good

Over: TAYLOR CREEK

1.4 E JCT SR 169, King, WA

Built 2005 Load: 58.0 t ADT: 16,302

US 2

Good

Over: BEAVER CREEK

2.0 E SNOHOMISH CO, King, WA

Built 1986 Load: 59.0 t ADT: 5,562

SR 18

Good

Over: 244TH AVE SE

1.2 E JCT SR 169, King, WA

Built 2006 Load: 59.0 t ADT: 16,302

EB SR 18 ON RAMP

Good

Over: TAYLOR CREEK

1.4 E JCT SR 169, King, WA

Built 2006 Load: 59.0 t ADT: 471

428TH AVE SE

Good

Over: MIDDLE FORK SNOQUALMIE R

2.1 MI E OF SR 202, King, WA

Built 1984 Load: 59.0 t ADT: 1,226

NE CARN. FARM RD

Good

Over: SLOUGH

0.2 MI W OF SR-203, King, WA

Built 1998 Load: 59.6 t ADT: 1,259

SR 202 WB

Good

Over: EVANS CREEK

2.4 E JCT SR 520, King, WA

Built 2006 Load: 59.9 t ADT: 14,868

120TH AVE NE

Good

Over: SOUND TRANSIT LIGHT RAIL

0.19 N NE 12TH ST, King, WA

Built 2017 Load: 60.3 t ADT: 5,298

364th Ave SE

Good

Over: Raging River

5.0 MI E OF ISSA-HO RD, King, WA

Built 2014 Load: 61.6 t ADT: 150

US 2

Good

Over: STREAM

3.1 E SNOHOMISH CO, King, WA

Built 1988 Load: 61.7 t ADT: 5,562

W SNO VALLEY RD

Good

Over: DRAINAGE DITCH

2.1 MI E OF SR-203, King, WA

Built 2016 Load: 61.9 t ADT: 660

RAMP

Good

Over: SHARED USE PATH

JCT SR 202, King, WA

Built 2023 Load: 62.9 t ADT: 26,910

NE 124TH ST

Good

Over: SAMMAMISH RIVER

0.5 MI W OF SR-202, King, WA

Built 2004 Load: 62.9 t ADT: 25,500

SR 18

Good

Over: SE 240TH ST

3.5 E JCT SR 516, King, WA

Built 2002 Load: 63.5 t ADT: 19,491

SR 18

Good

Over: 244TH AVE SE

1.2 E JCT SR 169, King, WA

Built 2005 Load: 63.5 t ADT: 395

264TH AVE SE

Good

Over: PATTERSON CREEK

0.1 MI S OF SR-202, King, WA

Built 2008 Load: 64.2 t ADT: 171

NE UNION HILL RD.

Good

Over: EVANS CREEK

2.5 MI E OF SR-202, King, WA

Built 2013 Load: 64.5 t ADT: 12,178

NB AIRPORT EXPY

Good

Over: SUBSTATION

1.0 MI S OF SR 518, King, WA

Built 2010 Load: 64.8 t ADT: 43,000

HOLMAN RD NW

Good

Over: 8TH AVE NW

Holman Rd NW & 8th Ave NW, King, WA

Built 1975 Load: 66.2 t ADT: 30,500

SE LAKE WALKER RD

Good

Over: COAL CREEK

3.5 MI W OF SR-169, King, WA

Built 2023 Load: 68.7 t ADT: 350

US 2

Good

Over: ALPINE CREEK

13.7 E SNOHOMISH CO, King, WA

Built 1998 Load: 68.9 t ADT: 4,915

SE MAY VALLEY ROAD

Good

Over: MAY CREEK

0.1 MI E OF SR-900, King, WA

Built 2010 Load: 70.3 t ADT: 6,018

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