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)

Sort:

S 212th ST

Over: GREEN RIVER

0.72 MI W OF 68TH AV S, King, WA

Built 1966 Load: 35.0 t ADT: 36,000

HIGHLAND DRIVE

Over: NORTH FORK ISSAQUAH CR

0.4 MI N OF NE HIGH ST, King, WA

Built 2002 Load: 35.3 t ADT: 22,600

SR 410

Over: SCATTER CREEK

6.2 E JCT SR 164, King, WA

Built 1965 Load: 35.4 t ADT: 2,043

SR 599

Over: 42ND AVE S / MACADAM RD

0.7 N JCT I-5, King, WA

Built 1968 Load: 35.4 t ADT: 22,020

SR 518

Over: DES MOINES WAY S

0.6 E JCT SR 509, King, WA

Built 1970 Load: 35.4 t ADT: 57,625

I-90

Over: AVALANCHE PATH

20.5 E JCT SR 202, King, WA

Built 1971 Load: 35.4 t ADT: 18,185

I-90

Over: E FK ISSAQUAH CREEK

2.9 E JCT SR 900, King, WA

Built 1976 Load: 35.4 t ADT: 33,574

I-405

Over: CEDAR RIVER

0.9 N JCT SR 515, King, WA

Built 1993 Load: 35.4 t ADT: 84,707

SW GRADY WAY

Over: SPRINGBROOK CREEK

0.7 MI E OF SR-181, King, WA

Built 1987 Load: 35.4 t ADT: 28,000

SW 27TH STREET

Over: SPRINGBROOK CREEK

0.2 MI WEST LIND AVE SW, King, WA

Built 2000 Load: 35.4 t ADT: 1,300

OAKESDALE AVE SW

Over: BLACK RIVER DRAIN

1.1 MI N OF I-405, King, WA

Built 1987 Load: 35.4 t ADT: 9,500

S JACKSON ST

Over: ST TUNNEL

S Jackson St WO 5th Ave S, King, WA

Built 1987 Load: 35.4 t ADT: 26,700

WOODINVILLE DUVALL

Over: DUVALL SLOUGH

0.8 MI W OF SR-203, King, WA

Built 1948 Load: 35.6 t ADT: 10,564

FERRY TRAFIC

Over: PUGET SOUND @ SEATTLE

W END MARION STREET, King, WA

Built 2019 Load: 36.0 t ADT: 12,000

N 27TH PLACE

Over: KENNYDALE CREEK

0.2 MI W OF I-405, King, WA

Built 2000 Load: 36.0 t ADT: 292

SR 167

Over: 84TH AVE SOUTH

1.7 N JCT SR 516, King, WA

Built 1967 Load: 36.3 t ADT: 52,291

SR 509

Over: S 128TH ST

1.3 N JCT SR 518, King, WA

Built 1968 Load: 36.3 t ADT: 40,368

I-90

Over: RAGING RIVER

7.5 E JCT SR 900, King, WA

Built 1975 Load: 36.3 t ADT: 29,903

SR 169

Over: CEDAR RIVER

7.9 N JCT SR 18, King, WA

Built 1994 Load: 36.3 t ADT: 38,535

CUMBERLAND-KANASKE

Over: GREEN RIVER

4.25 MI E OF SR-169, King, WA

Built 1918 Load: 36.3 t ADT: 2,061

CEDAR GROVE RD

Over: CEDAR RIVER

0.2 MI E OF SR-169, King, WA

Built 1962 Load: 36.3 t ADT: 5,971

NE 85TH STREET

Over: SAMMAMISH RIVER

0.5 MI W OF JCT SR-202, King, WA

Built 1985 Load: 36.3 t ADT: 12,000

1st Avenue ramp

Over: S Spokane St

1st Ave S at S Spokane St, King, WA

Built 2014 Load: 36.3 t ADT: 2,030

W VALLEY HWY

Over: MILL CR

0.7 MI S JCT SR-516, King, WA

Built 1915 Load: 36.6 t ADT: 24,100

SR 410

Over: GREENWATER RIVER

17.9 E JCT SR 164, King, WA

Built 1932 Load: 36.6 t ADT: 1,884

I-5

Over: EXP GALER-LAKEVIEW V

2.9 N JCT I-90, King, WA

Built 1961 Load: 37.2 t ADT: 37,212

I-5 RAMP

Over: CITY STREETS

0.8 N JCT I-90, King, WA

Built 1964 Load: 37.2 t ADT: 13,703

I-5

Over: TERRAIN

4.5 N JCT SR 900, King, WA

Built 1966 Load: 37.2 t ADT: 95,134

NE PARK DR

Over: RR AND HOUSER WAY N

0.3 W JCT I-405, King, WA

Built 1966 Load: 37.2 t ADT: 8,210

ROAD

Over: E FK MILLER RIVER

3.7 MI S OF 6410/HWY JCT, King, WA

Built 1964 Load: 37.2 t ADT: 44

PHINNEY AVE

Over: N 57TH ST

5700 Phinney Ave N, King, WA

Built 1900 Load: 37.2 t ADT: 12,400

228 PLACE SE

Over: GREEN RIVER

0.2 MI E OF GREEN VLY RD, King, WA

Built 1991 Load: 37.3 t ADT: 350

SR 203

Over: GRIFFIN CR

3.8 N JCT SR 202, King, WA

Built 1945 Load: 38.1 t ADT: 7,622

SR 520

Over: PEDESTRIAN TRAIL

0.2 E JCT I-405, King, WA

Built 1969 Load: 38.1 t ADT: 43,146

SR 520

Over: 140TH AVE NE

1.6 E JCT I-405, King, WA

Built 1972 Load: 38.1 t ADT: 43,146

I-90

Over: E FK ISSAQUAH CREEK

3.3 E JCT SR 900, King, WA

Built 1976 Load: 38.1 t ADT: 33,574

SW 43RD STREET

Over: SPRINGBROOK CREEK

1.0 MI W OF SR-167, King, WA

Built 1983 Load: 38.1 t ADT: 27,713

A STREET SE

Over: STUCK RIVER (WHITE RIV)

1.3 MI E OF SR-167, King, WA

Built 1991 Load: 38.1 t ADT: 25,650

I-90

Over: GAME CROSSING

1.3 E JCT SR 18, King, WA

Built 1976 Load: 38.2 t ADT: 33,470

AVONDALE ROAD

Over: BEAR CREEK

4.3 MI E OF SR-405, King, WA

Built 1995 Load: 38.2 t ADT: 24,768

CENTRAL WAY

Over: NP RY

3.3 N JCT SR 520, King, WA

Built 1965 Load: 38.9 t ADT: 24,500

I-5

Over: TERRAIN

5.6 N JCT SR 900, King, WA

Built 1966 Load: 38.9 t ADT: 94,901

SR 520

Over: LAKE WASHINGTON

1.5 E JCT SR 513, King, WA

Built 2016 Load: 38.9 t ADT: 56,378

S 196TH ST

Over: UPRR, 77TH AVE S, BNSFRR

7200 S 196TH ST, King, WA

Built 2000 Load: 38.9 t ADT: 11,000

I-5

Over: GALER-LAKEVIEW V

2.9 N JCT I-90, King, WA

Built 1961 Load: 39.0 t ADT: 103,122

SR 167

Over: MEEKER ST

0.2 N JCT SR 516, King, WA

Built 1967 Load: 39.0 t ADT: 54,591

SR 167

Over: MEEKER ST

0.2 N JCT SR 516, King, WA

Built 1967 Load: 39.0 t ADT: 54,591

SR 167

Over: JAMES ST

0.6 N JCT SR 516, King, WA

Built 1967 Load: 39.0 t ADT: 59,986

I-405

Over: NE 132ND ST

6.1 N JCT SR 520, King, WA

Built 1970 Load: 39.0 t ADT: 63,798

SR 518

Over: 8TH AVE

0.4 E JCT SR 509, King, WA

Built 1970 Load: 39.0 t ADT: 57,625

Read our methodology — how this data is sourced, computed, and verified.

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

Reviewed byPlainbridges Editorial, Plain Bridges Editorial Team · June 6, 2026