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)

NE 116TH STREET

Good

Over: SAMMAMISH RIVER

0.5 MI W OF SR-202, King, WA

Built 2006 Load: 30.8 t ADT: 2,200

SR 167

Good

Over: THIRD AVE SW

0.5 N PIERCE CO, King, WA

Built 1977 Load: 31.1 t ADT: 99,656

I-90

Good

Over: S FK SNOQUALMIE R

7.3 E JCT SR 202, King, WA

Built 1974 Load: 31.7 t ADT: 18,182

SR 900

Good

Over: TIBBETTS CR

9.0 E JCT I-405, King, WA

Built 1975 Load: 31.7 t ADT: 21,488

SW MICHIGAN ST

Good

Over: WETLAND MIT. CHANNEL

UNDER S APPR 99/530, King, WA

Built 1996 Load: 31.7 t ADT: 515

SR 18

Good

Over: KENT-BLACK DIAMOND RD

6.2 E JCT SR 164, King, WA

Built 1996 Load: 31.7 t ADT: 25,223

SR 99

Good

Over: TERRAIN

3.3 N JCT SR 509, King, WA

Built 2011 Load: 31.8 t ADT: 25,232

NO DATA ENTERED

Good

Over: SLIPPERY CREEK TRIB.

NO DATA ENTERED, King, WA

Built 2010 Load: 32.4 t ADT: 50

NE 124TH ST

Good

Over: SNOQUALMIE RIVER

0.5 MI W OF SR 203, King, WA

Built 2000 Load: 32.4 t ADT: 12,222

NE LK WASH. BLVD

Good

Over: MEYDENBAUER BEACH PARK

NE LAKE WASHINGTON BLVD, King, WA

Built 2002 Load: 32.4 t ADT: 6,267

NW 8TH ST

Good

Over: RIBARY CREEK

0.2 MI W OF SR-202, King, WA

Built 2006 Load: 32.4 t ADT: 700

AIRPORT NB-SB LOOP

Good

Over: AIRPORT EXPRESSWAY

0.25 MI S OF SR518, King, WA

Built 2010 Load: 32.4 t ADT: 40,000

62ND WAY NE

Good

Over: WETLAND STREAM

0.75 MI N OF SR-522, King, WA

Built 2010 Load: 32.4 t ADT: 50

124TH AVE NE

Good

Over: SOUND TRANSIT LIGHT RAIL

0.30 N NE 12TH ST, King, WA

Built 2019 Load: 32.4 t ADT: 6,597

Fairview Ave N

Good

Over: Union Bay

1241 Fairview Ave N, King, WA

Built 2021 Load: 32.4 t ADT: 3,600

SR 203

Good

Over: SLOUGH

16.6 N JCT SR 202, King, WA

Built 1945 Load: 32.7 t ADT: 10,190

S-W RAMP

Good

Over: LUCILE ST & RR

4.1 N JCT SR 900, King, WA

Built 1967 Load: 32.7 t ADT: 12,879

SR 518

Good

Over: W-S RAMP

1.9 E JCT SR 509, King, WA

Built 1971 Load: 32.7 t ADT: 51,803

SR 520

Good

Over: 140TH AVE NE

1.6 E JCT I-405, King, WA

Built 1972 Load: 32.7 t ADT: 43,146

SR 520

Good

Over: LAKE WASHINGTON

2.9 E JCT SR 513, King, WA

Built 2016 Load: 32.7 t ADT: 28,189

SR 520

Good

Over: LAKE WASHINGTON

0.7 E JCT SR 513, King, WA

Built 2017 Load: 32.7 t ADT: 18,960

I-90 WB

Good

Over: TALAPUS CR TRIBUTARY

15.7 E JCT SR 202, King, WA

Built 1972 Load: 32.7 t ADT: 18,193

I-90 WB

Good

Over: TALAPUS CREEK

15.6 E JCT SR 202, King, WA

Built 1972 Load: 32.7 t ADT: 18,193

I-5 SB

Good

Over: FALLOUT SHELTER

2.3 N JCT SR 520, King, WA

Built 1963 Load: 32.7 t ADT: 74,713

PARK ENTRANCE

Good

Over: SMITH CREEK

SALTWATER STATE PARK, King, WA

Built 1992 Load: 32.7 t ADT: 850

CAMP LOOP

Good

Over: McSorley Creek

SALTWATER STATE PARK, King, WA

Built 1992 Load: 32.7 t ADT: 50

CAMP LOOP

Good

Over: McSorley Creek

SALTWATER STATE PARK, King, WA

Built 1992 Load: 32.7 t ADT: 50

CAMP LOOP

Good

Over: MCSORLEY CREEK

SALTWATER STATE PARK, King, WA

Built 1992 Load: 32.7 t ADT: 50

SR 900

Good

Over: WETLANDS

8.4 E JCT I-405, King, WA

Built 2002 Load: 32.7 t ADT: 10,744

SE LK DOROTHY RD

Good

Over: UNNAMED TRIBUTARY

5.7 MI N OF I-90, King, WA

Built 2015 Load: 32.7 t ADT: 125

NE W-D RD

Good

Over: TUCK CREEK

1.4 Mi W of SR 203, King, WA

Built 2017 Load: 32.7 t ADT: 10,500

PARKING LOT ROAD

Good

Over: SOUND TRANSIT LIGHT RAIL

W. OF WINTERS HOUSE, King, WA

Built 2023 Load: 32.7 t ADT: 100

112TH AVE SE

Good

Over: SOUND TRANSIT LIGHT RAIL

0.4 Mi N of Bellevue Way, King, WA

Built 2023 Load: 32.7 t ADT: 500

REC PARKING AREA

Good

Over: CHANGE CREEK

0.8 SE JCT I-90, King, WA

Built 1953 Load: 33.0 t ADT: 33

NORVYDAN RD

Good

Over: TAYLOR CREEK

0.01 MI N OF SR-18, King, WA

Built 2005 Load: 33.0 t ADT: 1,600

SR 99

Good

Over: CITY STREETS & RAILROAD

3.3 N JCT SR 509, King, WA

Built 2011 Load: 33.0 t ADT: 25,232

YESLER WAY

Good

Over: 4TH AVE S

4th Ave S & Yesler Way, King, WA

Built 1909 Load: 33.0 t ADT: 8,000

4TH AVE NW

Good

Over: NORTH FORK ISSAQUAH CR

0.3 MI N OF GILMAN, King, WA

Built 2011 Load: 33.0 t ADT: 5,500

ALASKAN WAY SOUTH

Good

Over: BNSF RR

3.6 N JCT SR 509, King, WA

Built 2013 Load: 33.4 t ADT: 8,000

S 228TH STREET

Good

Over: BNSF RR

0.2 MI W OF SR-167, King, WA

Built 2009 Load: 33.4 t ADT: 2,200

I-90

Good

Over: S FK SNOQUALMIE R

7.3 E JCT SR 202, King, WA

Built 1974 Load: 33.6 t ADT: 18,182

N-E RAMP

Good

Over: OCCIDENTAL AVE S

0.4 N JCT SR 509, King, WA

Built 1998 Load: 33.6 t ADT: 16,470

SR 18

Good

Over: CEDAR RIVER, SE BAIN RD

5.2 N JCT SR 516, King, WA

Built 2005 Load: 33.6 t ADT: 16,302

405 NE RAMP

Good

Over: NE RAMP OVER PED PATH

5.7 N JCT SR 900, King, WA

Built 2021 Load: 33.7 t ADT: 35,432

SE LAKE DOROTHY RD

Good

Over: SLIDE DEPRESSION

3.0 MI N OF I-90, King, WA

Built 2011 Load: 33.7 t ADT: 99

Spokane Street

Good

Over: Spokane Street

E Marginal and Spokane St, King, WA

Built 2012 Load: 33.7 t ADT: 10,000

SE 62ND STREET

Good

Over: ISSAQUAH CREEK

0.3 MI N OF I-90, King, WA

Built 2019 Load: 33.7 t ADT: 5,500

ROAD

Good

Over: MONEY CREEK

0.9 MILE FROM COUNTY ROAD, King, WA

Built 2011 Load: 34.0 t ADT: 5

SE JONES ROAD

Good

Over: CEDAR RIVER & TRAIL

0.01 MI E OF SR-169, King, WA

Built 2003 Load: 34.0 t ADT: 4,560

SW SPOKANE ST

Good

Over: RR

SW SPOKANE ST/HARBOR AVE, King, WA

Built 2001 Load: 34.3 t ADT: 8,297

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.