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)

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.

Related

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Data sourced from official U.S. government datasets. See our methodology for details. Retrieved and formatted by PlainBridges Editorial