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)

SR 202

Good

Over: S FK SNOQUALMIE RIVER

8.3 E JCT SR 203, King, WA

Built 1976 Load: 39.0 t ADT: 11,976

SR 18

Good

Over: CAREY CREEK

4.0 E JCT SR 169, King, WA

Built 1995 Load: 39.0 t ADT: 15,143

SE 304TH ST

Good

Over: SOOSETTE CREEK

0.1 E JCT SR 18, King, WA

Built 1997 Load: 39.0 t ADT: 11,963

HOV ON/OFF RAMPS

Good

Over: I-90

1.2 E JCT I-405, King, WA

Built 2006 Load: 39.0 t ADT: 1,266

SE GROUSE RIDGE RD

Good

Over: S FK SNOQUALMIE RIVER

0.4 N I-90, King, WA

Built 1982 Load: 39.0 t ADT: 45

ROAD

Good

Over: MARTIN CREEK

0.1 MI W OF 6710/230 JCT, King, WA

Built 1981 Load: 39.0 t ADT: 5

154TH PLACE SE

Good

Over: CEDAR RIVER

0.1 MILE N OF SR-169, King, WA

Built 2005 Load: 39.0 t ADT: 18,726

S 277TH ST

Good

Over: GREEN RV & GREEN RV RD.

GREEN RIVER AT S 277TH ST, King, WA

Built 2000 Load: 39.2 t ADT: 21,300

SKAGIT KEY

Good

Over: COAL CREEK

0.1 N JCT NEWPORT KEY, King, WA

Built 2019 Load: 39.2 t ADT: 139

I-5 SB HOV LANE

Good

Over: INTERURBAN AVE

0.1 N JCT SR 599, King, WA

Built 1996 Load: 39.5 t ADT: 9,938

W SNOQ RIVER RD NE

Good

Over: DRAINAGE DITCH

2 MI N OF SR-202, King, WA

Built 2008 Load: 39.5 t ADT: 798

I-90

Good

Over: S FK SNOQUALMIE RIVER

6.4 E JCT SR 202, King, WA

Built 1971 Load: 39.9 t ADT: 18,493

SR 169

Good

Over: NEWAUKUM CREEK

1.5 N JCT SR 164, King, WA

Built 1988 Load: 39.9 t ADT: 10,473

RAMP ACCESS ROAD

Good

Over: GREEN RIVER

0.1 N I-405, King, WA

Built 1994 Load: 39.9 t ADT: 7,007

SR 520

Good

Over: YARROW CREEK

5.1 E JCT SR 513, King, WA

Built 2014 Load: 39.9 t ADT: 52,112

REDMOND RIDGE NE

Good

Over: WETLAND

300' NW of NE 80th Street, King, WA

Built 2001 Load: 39.9 t ADT: 5,998

ROAD

Good

Over: MONEY CREEK

0.9 MILE FROM COUNTY ROAD, King, WA

Built 2011 Load: 40.2 t ADT: 5

SR 203

Good

Over: LOUTSIS CREEK

13.6 N JCT SR 202, King, WA

Built 2020 Load: 40.5 t ADT: 13,128

TOKUL ROAD SE

Good

Over: TOKUL CREEK

1.5 ,I NE OF SR202, King, WA

Built 2023 Load: 40.5 t ADT: 415

SR 18

Good

Over: F ST SE

0.2 E JCT SR 164, King, WA

Built 1958 Load: 40.8 t ADT: 49,640

E-N RAMP

Good

Over: SOUTHCENTER BLVD

1.1 E JCT SR 99, King, WA

Built 1965 Load: 40.8 t ADT: 14,537

US 2

Good

Over: TUNNEL CREEK

19.8 E SNOHOMISH CO, King, WA

Built 1985 Load: 40.8 t ADT: 2,414

US 2

Good

Over: STREAM

3.7 E SNOHOMISH CO, King, WA

Built 1988 Load: 40.8 t ADT: 5,562

HIGHLANDS DR NE

Good

Over: PEDESTRIAN TUNNEL

2.1 E JCT SR 900, King, WA

Built 2003 Load: 40.8 t ADT: 19,258

SR 169

Good

Over: RAVENSDALE CREEK

10.0 N JCT SR 164, King, WA

Built 2022 Load: 40.8 t ADT: 14,091

WITTE ROAD

Good

Over: PARK TRAIL

0.5 MI E OF SR-168, King, WA

Built 1996 Load: 40.8 t ADT: 8,100

240TH AVE SE

Good

Over: 15 MILE CREEK

0.2 MI N TIGER MT. RD, King, WA

Built 2013 Load: 40.8 t ADT: 110

ROAD

Good

Over: GREEN RIVER

5.3 MI W OF TACOMA PASS, King, WA

Built 1995 Load: 40.9 t ADT: 17

ROAD

Good

Over: S FK SNOQUALMIE RIVER

2 MI NE OF 58/9035 JCT, King, WA

Built 2004 Load: 40.9 t ADT: 232

N-E RAMP

Good

Over: TRAIL

4.0 N JCT I-90, King, WA

Built 2011 Load: 41.5 t ADT: 8,000

SR99

Good

Over: W. Fk. HYLEBOS CREEK

0.7 N PIERCE CO, King, WA

Built 2015 Load: 41.5 t ADT: 23,660

I-405

Good

Over: NORTHUP WAY

0.1 N JCT SR 520, King, WA

Built 1965 Load: 41.7 t ADT: 65,986

I-5

Good

Over: MILITARY RD ROSE ST

2.2 N JCT SR 900, King, WA

Built 1966 Load: 41.7 t ADT: 101,485

W-N RAMP

Good

Over: TERRAIN

5.5 N JCT SR 900, King, WA

Built 1967 Load: 41.7 t ADT: 5,951

PRINCETON AVE NE

Good

Over: BURKE GILMAN TRAIL

5400 Sand Point Way NE, King, WA

Built 2002 Load: 41.7 t ADT: 5,233

RAMP

Good

Over: RAILROAD

JCT SR 202, King, WA

Built 2023 Load: 41.8 t ADT: 26,910

ROAD

Good

Over: TACOMA CREEK

1.4 MI W OF TACOMA PASS, King, WA

Built 1995 Load: 41.8 t ADT: 17

ROAD

Good

Over: BURNS CREEK

4.4 MI OF HW 2/68 JCT, King, WA

Built 1999 Load: 41.8 t ADT: 156

I-405 NB

Good

Over: NE 44TH ST

2.0 N JCT SR 900, King, WA

Built 2023 Load: 42.1 t ADT: 68,675

98 AVE NE

Good

Over: FORBES CREEK

1.5 MI N CENTRAL W, King, WA

Built 1974 Load: 42.1 t ADT: 20,400

HARBOR AVE SW

Good

Over: SW Avalon Way & Railroad

SW Spokane St & Admiral, King, WA

Built 2001 Load: 42.1 t ADT: 8,535

NB AIRPORT EXPY

Good

Over: NAE AOA TUNNEL

0.1 MILE N OF S 170TH ST, King, WA

Built 2010 Load: 42.1 t ADT: 34,200

S LANDER ST

Good

Over: RR UXING

400 FT EAST OF 1ST AVE S, King, WA

Built 2019 Load: 42.1 t ADT: 1,000

NEWPORT WAY SW

Good

Over: TIBBETTS CREEK

0.1 MI W OF SR-900, King, WA

Built 2001 Load: 42.4 t ADT: 16,500

SE ISSQ-FALL CTY

Good

Over: WETLAND

.03 MI E OF JCT 247 PL SE, King, WA

Built 2021 Load: 42.4 t ADT: 10,000

I-5

Good

Over: MILITARY RD

2.6 N JCT SR 18, King, WA

Built 1959 Load: 42.6 t ADT: 94,670

SR 202

Good

Over: SAMMAMISH R

0.4 E JCT SR 522, King, WA

Built 1963 Load: 42.6 t ADT: 8,987

I-5

Good

Over: SOUTHCENTER BLVD

5.2 N JCT SR 516, King, WA

Built 1965 Load: 42.6 t ADT: 112,452

SR 410

Good

Over: SLIPPERY CREEK

17.6 E JCT SR 164, King, WA

Built 1967 Load: 42.6 t ADT: 1,884

I-5

Good

Over: TERRAIN

3.9 N JCT SR 900, King, WA

Built 1969 Load: 42.6 t ADT: 4,737

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.