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)

I-90

Good

Over: FRONT STREET

1.3 E JCT SR 900, King, WA

Built 1971 Load: 12.0 t ADT: 30,913

SR 167

Good

Over: RAILROAD & PED TRAIL

0.8 N JCT SR 516, King, WA

Built 1967 Load: 13.3 t ADT: 59,986

SE 86TH STREET

Good

Over: RAGING RIVER

0.1 MI E OF PRSTN-FALL RD, King, WA

Built 2003 Load: 13.3 t ADT: 210

I-405

Good

Over: 115th AVE NE & TRAIL

0.2 N JCT SR 520, King, WA

Built 1965 Load: 14.6 t ADT: 65,986

E LAKE SAMMAMISH

Good

Over: DRAINAGE DITCH

0.5 M N OF INGLEWOOD, King, WA

Built 1961 Load: 14.6 t ADT: 23,000

I-405

Good

Over: PEDESTRIAN TRAIL

5.2 N JCT SR 520, King, WA

Built 1956 Load: 15.2 t ADT: 80,878

I-90

Good

Over: GARCIA INTERCHANGE

6.5 E JCT SR 202, King, WA

Built 1974 Load: 15.6 t ADT: 18,182

SR 18

Good

Over: UP RR

0.6 E JCT SR 167, King, WA

Built 1972 Load: 16.2 t ADT: 49,308

SR 160

Good

Over: PUGET SOUND @ PT VASHON

N END VASHON ISLAND, King, WA

Built 1997 Load: 16.3 t ADT: 4,675

SR 160

Good

Over: PUGET SOUND @ FAUNTLEROY

3.0 W SR 509, King, WA

Built 1984 Load: 16.3 t ADT: 9,721

328 WAY SE

Good

Over: RAGING RIVER

300 FT N OF FALL CITY RD, King, WA

Built 1998 Load: 16.5 t ADT: 1,563

US 2

Good

Over: TUNNEL CREEK

19.8 E SNOHOMISH CO, King, WA

Built 1941 Load: 16.8 t ADT: 2,414

168TH WAY SE

Good

Over: COVINGTON CREEK

2.7 MI E OF SR-18, King, WA

Built 1964 Load: 16.8 t ADT: 1,080

SR 522

Good

Over: E-N RAMP BR

1.3 E JCT SR 527, King, WA

Built 1968 Load: 17.2 t ADT: 1,600

I-90

Good

Over: SO FK SNOQUALMIE R

9.2 E JCT SR 202, King, WA

Built 1976 Load: 17.5 t ADT: 18,182

72ND AVE SE

Good

Over: FIRST HILL LID

3.4 E JCT I-5, King, WA

Built 1992 Load: 17.8 t ADT: 2,472

SR 202

Good

Over: SAMMAMISH R

2.5 E JCT SR 522, King, WA

Built 1955 Load: 18.1 t ADT: 8,751

I-5

Good

Over: SOUTHCENTER BLVD

5.2 N JCT SR 516, King, WA

Built 1965 Load: 18.1 t ADT: 112,452

SR 181

Good

Over: MILL CREEK

3.0 N JCT SR 516, King, WA

Built 1922 Load: 18.1 t ADT: 30,041

I-405

Good

Over: MAY CREEK

1.8 N JCT SR 900, King, WA

Built 1958 Load: 18.5 t ADT: 72,796

SR 18

Good

Over: BNSF RR SPUR

0.8 E JCT SR 164, King, WA

Built 1960 Load: 18.8 t ADT: 30,974

SR 520

Good

Over: PEDESTRIAN TRAIL

0.2 E JCT I-405, King, WA

Built 1966 Load: 19.8 t ADT: 43,146

SR 202

Good

Over: TOKUL CREEK

2.7 E JCT SR 203, King, WA

Built 1984 Load: 19.8 t ADT: 9,502

SR 181

Good

Over: SLOUGH

2.8 N JCT SR 516, King, WA

Built 1922 Load: 20.1 t ADT: 30,041

REDMOND WAY

Good

Over: 154TH AVE NE

2.5 MI E JCT I-405, King, WA

Built 1992 Load: 20.4 t ADT: 27,000

EB I-90

Good

Over: LAKE WASHINGTON

3.8 E JCT I-5, King, WA

Built 1940 Load: 20.7 t ADT: 63,053

SR 509

Good

Over: 1ST AVE S

5.0 N PIERCE CO, King, WA

Built 1961 Load: 20.9 t ADT: 12,030

SE NORTH BEND WAY

Good

Over: KIMBALL CREEK

0.5 MI N OF I-90, King, WA

Built 1941 Load: 20.9 t ADT: 5,809

NW 57TH ST

Good

Over: RR TRACK

NW 57th Pl & NW 57th St, King, WA

Built 1986 Load: 20.9 t ADT: 730

W FORT ST

Good

Over: RAILROAD

W FORT ST & GILMAN AVE W, King, WA

Built 1986 Load: 20.9 t ADT: 1,600

US 2

Good

Over: TYE RIVER

18.1 E SNOHOMISH CO, King, WA

Built 1947 Load: 21.4 t ADT: 4,827

EXP N TO 42ND RAMP

Good

Over: PASADENA PL NE

4.6 N JCT I-90, King, WA

Built 1962 Load: 21.4 t ADT: 2,542

US 2

Good

Over: BNRR

2.3 E SNOHOMISH CO, King, WA

Built 1986 Load: 21.4 t ADT: 5,562

468TH AVE SE

Good

Over: S FK SNOQUALMIE RIVER

1.0 MI S OF I-90, King, WA

Built 2004 Load: 21.4 t ADT: 1,510

I-405

Good

Over: PEDESTRIAN TRAIL

5.2 N JCT SR 520, King, WA

Built 1970 Load: 21.7 t ADT: 80,878

I-90

Good

Over: E FK ISSAQUAH CREEK

2.2 E JCT SR 900, King, WA

Built 1976 Load: 21.7 t ADT: 29,843

NORTH CREEK PKWY

Good

Over: NORTH CREEK

0.5 E SR 405, King, WA

Built 1984 Load: 21.7 t ADT: 6,593

16TH AVE SW

Good

Over: KLICKITAT AVE SW, RR

16th Ave SW & Klickitat, King, WA

Built 2001 Load: 21.7 t ADT: 9,000

FERRY TRAFFIC

Good

Over: PUGET SOUND @ SEATTLE

W END MARION ST, King, WA

Built 1990 Load: 21.8 t ADT: 10,212

NORTH CREEK PKWY

Good

Over: NORTH CREEK

0.5 E SR-405, King, WA

Built 1984 Load: 21.8 t ADT: 4,641

8TH AVE NW

Good

Over: RAVINE

8th Ave NW S/O NW Elford, King, WA

Built 1950 Load: 21.8 t ADT: 1,150

MONTE VILLA PRKWAY

Good

Over: NORTH CREEK

0.2 E I405, King, WA

Built 1994 Load: 21.8 t ADT: 3,064

HOMESTEAD VLY RD

Good

Over: CHANGE CREEK

0.8 SE JCT I-90, King, WA

Built 1928 Load: 22.0 t ADT: 257

I-405

Good

Over: NORTH CREEK

0.6 N JCT SR 522, King, WA

Built 1968 Load: 22.4 t ADT: 104,974

I-90

Good

Over: RICHARDS RD

0.2 E JCT I-405, King, WA

Built 1968 Load: 22.7 t ADT: 63,853

SR 509

Good

Over: GLENDALE WAY

2.3 N JCT SR 518, King, WA

Built 1968 Load: 22.7 t ADT: 47,151

I-405

Good

Over: NORTHUP WAY

0.1 N JCT SR 520, King, WA

Built 1954 Load: 23.0 t ADT: 65,986

N.E. DOGWOOD ST.

Good

Over: E.FK. ISSAQUAH CK.

0.1 MI W OF I-90, King, WA

Built 1996 Load: 23.0 t ADT: 1,200

FREMONT AVE N

Good

Over: ACCESS RD, PARKING

3400 Fremont Ave N, King, WA

Built 2009 Load: 23.0 t ADT: 34,000

ROAD

Good

Over: FOSS RIVER

5.7 MI S OF HWY 2/68 JCT, King, WA

Built 1962 Load: 23.6 t ADT: 156

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