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)

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 public datasets. See our methodology for details. Retrieved and formatted by PlainBridges

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Compiled by PlainBridges, Independent data publisher

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.