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)

TIBBETTS CK LN NW

Good

Over: TIBBETS CREEK

0.01 MI S of Shy Bear Way, King, WA

Built 2008 Load: 47.3 t ADT: 525

N 40TH PLACE

Good

Over: MAY CREEK

0.2 MI W OF I-405, King, WA

Built 2007 Load: 47.3 t ADT: 165

SE 424TH ST

Good

Over: WATERCRESS CREEK

0.6 MI W 284TH AVE SE, King, WA

Built 2011 Load: 47.3 t ADT: 140

WESTBOUND I-90

Good

Over: S TRANSIT RR, LAKEVIEW A

1.5 E JCT I-5, King, WA

Built 1989 Load: 47.6 t ADT: 63,053

SR 167 SB OFF-RAMP

Good

Over: SPRINGBROOK CREEK

1.8 N JCT SR 516, King, WA

Built 1986 Load: 48.1 t ADT: 10,099

SR 516

Good

Over: WETLANDS

2.9 E JCT SR 515, King, WA

Built 1994 Load: 48.1 t ADT: 31,532

I-405 RAMP

Good

Over: SOUTHCENTER BLVD

0.9 N JCT I-5, King, WA

Built 1994 Load: 48.1 t ADT: 8,919

SR 18

Good

Over: GREEN RIVER

2.5 E JCT SR 164, King, WA

Built 1995 Load: 48.1 t ADT: 27,460

SR 18

Good

Over: CAREY CREEK

4.0 E JCT SR 169, King, WA

Built 1996 Load: 48.1 t ADT: 15,143

WB I-90

Good

Over: TIBBETTS CREEK

5.4 E JCT I-405, King, WA

Built 2004 Load: 48.1 t ADT: 39,272

EB I-90

Good

Over: TIBBETTS CREEK

5.4 E JCT I-405, King, WA

Built 2004 Load: 48.1 t ADT: 39,272

405 N-E RAMP

Good

Over: 116TH AVE NE

3.8 N JCT I-90, King, WA

Built 2011 Load: 48.3 t ADT: 27,000

E LAKE SAMMAMISH

Good

Over: N FORK ISSAQUAH CREEK

1.3 E JCT SR 900, King, WA

Built 2017 Load: 48.3 t ADT: 35,000

I-405

Good

Over: MAY CREEK

1.8 N JCT SR 900, King, WA

Built 2023 Load: 48.3 t ADT: 72,796

KELLY RD NE

Good

Over: HARRIS CREEK

2.5 MI E OF SR-203, King, WA

Built 2005 Load: 48.3 t ADT: 3,101

Riverview Blvd. S

Good

Over: Veterans Dr.

1.5 MI E OF I-5, King, WA

Built 2007 Load: 48.3 t ADT: 750

108TH AVE NE

Good

Over: YARROW CREEK

5.27 E JCT SR 513, King, WA

Built 2014 Load: 48.6 t ADT: 12,500

SE 416th ST

Good

Over: NEWAUKUM CREEK

0.6 MI E OF SR-169, King, WA

Built 2009 Load: 48.6 t ADT: 1,874

72ND AVENUE SOUTH

Good

Over: Mill Creek

0.25 MI E OF SR-181, King, WA

Built 2017 Load: 48.9 t ADT: 5,000

I-5 NB HOV

Good

Over: SOUTHCENTER BLVD

JCT I-405 & SR 518, King, WA

Built 1996 Load: 49.0 t ADT: 6,776

I-405

Good

Over: NE 116TH ST

5.0 N JCT SR 520, King, WA

Built 2007 Load: 49.0 t ADT: 80,878

I-405

Good

Over: NE 116TH ST

5.0 N JCT SR 520, King, WA

Built 2006 Load: 49.0 t ADT: 80,878

SB I-405 RAMP

Good

Over: BENSON ROAD

0.4 N JCT SR 515, King, WA

Built 2010 Load: 49.0 t ADT: 11,338

ROAD

Good

Over: UNNAMED CREEK

1.7 MI W OF 5403/5405 JCT, King, WA

Built 1995 Load: 49.0 t ADT: 10

ROAD

Good

Over: BOLT CREEK

SEC.24, T26N, R11E, King, WA

Built 1997 Load: 49.0 t ADT: 75

ROAD

Good

Over: HARLAN CREEK

4.4 MI N OF HWY 2/65 JCT, King, WA

Built 1991 Load: 49.0 t ADT: 114

ROAD

Good

Over: BURNS CREEK

0.24 MI S OF 68/6835 JCT, King, WA

Built 1999 Load: 49.0 t ADT: 60

LAKE WA BLVD

Good

Over: MAY CREEK

0.2 MILES SW I-405 EXIT 7, King, WA

Built 1996 Load: 49.0 t ADT: 5,478

S 228th STREET

Good

Over: UPRR

0.3 MI W OF SR-167, King, WA

Built 2021 Load: 49.2 t ADT: 2,200

NORTH FORK RD SE

Good

Over: N FORK SNOQUALMIE RIVER

14.8 MI N OF I-90, King, WA

Built 2008 Load: 49.6 t ADT: 60

SR 203

Good

Over: SLOUGH

1.8 N JCT SR 202, King, WA

Built 1986 Load: 49.9 t ADT: 7,622

SR 18 RAMP

Good

Over: HOLDER CR & HOBART RD

4.6 E JCT SR 169, King, WA

Built 1996 Load: 49.9 t ADT: 912

ISSAQUAH-HOBART RD

Good

Over: HOLDER CREEK

4.6 E JCT SR 169, King, WA

Built 1996 Load: 49.9 t ADT: 8,691

SR 18

Good

Over: TAYLOR CREEK

1.6 E JCT SR 169, King, WA

Built 2005 Load: 49.9 t ADT: 16,302

S 373RD ST

Good

Over: HYLEBOS CREEK

0.25 MI E OF SR-99, King, WA

Built 2007 Load: 49.9 t ADT: 900

TINKHAM ROAD

Good

Over: S.FK. SNOQUALMIE

I90 EAST EXIT 42, King, WA

Built 1972 Load: 50.2 t ADT: 120

S 218TH STREET

Good

Over: GARRISON CREEK

0.25 MI E of SR 167, King, WA

Built 2019 Load: 50.5 t ADT: 3,000

ROAD

Good

Over: TWIN CAMPS CREEK

6.3 MI W OF TACOMA PASS, King, WA

Built 1966 Load: 50.8 t ADT: 14

OFF RAMP 4th AVE

Good

Over: SOUTH SPOKANE STREET

4th Ave S & Spokane St Vi, King, WA

Built 2010 Load: 51.5 t ADT: 24,000

I-5 SB HOV

Good

Over: KLICKITAT DR

JCT I-405, King, WA

Built 1996 Load: 51.7 t ADT: 6,574

SE MAY VALLEY RD

Good

Over: ISSAQUAH CREEK

0.4 MI W OF ISS-HOBART RD, King, WA

Built 2009 Load: 51.8 t ADT: 4,279

LAKESIDE BLVD E

Good

Over: KENT LAKES

23900 LAKESIDE BLVD E, King, WA

Built 1985 Load: 52.2 t ADT: 570

SR 516

Good

Over: MULLEN SLOUGH & DIRT RD.

1.8 E JCT I-5, King, WA

Built 1983 Load: 52.6 t ADT: 23,306

SR 516

Good

Over: BIG SOOS CREEK

3.7 E JCT SR 515, King, WA

Built 1994 Load: 52.6 t ADT: 28,754

SR 18

Good

Over: JENKINS CREEK

2.1 E JCT SR 516, King, WA

Built 2002 Load: 52.6 t ADT: 19,491

SR 18

Good

Over: SE 240TH ST

3.5 E JCT SR 516, King, WA

Built 2002 Load: 52.6 t ADT: 19,491

I-405

Good

Over: SPRINGBROOK/OAKESDALE

0.6 N JCT SR 181, King, WA

Built 2009 Load: 52.6 t ADT: 166,259

S-W RAMP

Good

Over: CAMPUS WAY NE

0.6 W JCT I-405, King, WA

Built 2008 Load: 52.6 t ADT: 8,549

15TH AVE NE

Good

Over: THORNTON CR, RAVINE

10411 15th Ave NE, King, WA

Built 1949 Load: 52.8 t ADT: 9,189

SR 167 OFF RAMP NB

Good

Over: SPRINGBROOK CREEK

1.8 N JCT SR 516, King, WA

Built 1986 Load: 53.5 t ADT: 8,606

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.