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:

WEYERHAEUSER WAY S

Over: SR 18

0.7 E JCT I-5, King, WA

Built 1970 ADT: 55,921

W MAIN ST

Over: SR 167

0.1 N JCT SR 18, King, WA

Built 1972 ADT: 43,163

15TH ST NW

Over: SR 167

1.5 N JCT SR 18, King, WA

Built 1972 ADT: 114,151

37TH ST NW

Over: SR 167

2.7 N JCT SR 18, King, WA

Built 1971 ADT: 129,748

SR 518

Over: N-W RAMP, SR 518

1.9 E JCT SR 509, King, WA

Built 1971 ADT: 51,803

I-90

Over: 468TH AVE SE

4.4 E JCT SR 202, King, WA

Built 1971 ADT: 5,568

I-90

Over: 468TH AVE SE

4.4 E JCT SR 202, King, WA

Built 1971 ADT: 5,568

SR 520

Over: 124 AVE NE - NW RAMP

0.6 E JCT I-405, King, WA

Built 1971 ADT: 13,000

SR 520

Over: 124 AVE NE - NW RAMP

0.6 E JCT I-405, King, WA

Built 1971 ADT: 13,000

HANSEN CR RD

Over: I-90

17.1 E JCT SR 202, King, WA

Built 1971 ADT: 35,874

I-90

Over: W LAKE SAMMAMISH PKWY

3.7 E JCT I-405, King, WA

Built 1972 ADT: 15,961

I-90

Over: W LAKE SAMMAMISH PKWY

3.7 E JCT I-405, King, WA

Built 1972 ADT: 15,961

I-90 RAMP

Over: W LAKE SAMMAMISH PKWY

3.7 E JCT I-405, King, WA

Built 1972 ADT: 15,759

150TH AVE SE

Over: I-90

1.7 E JCT I-405, King, WA

Built 1973 ADT: 127,706

150TH AVE SE

Over: I-90

1.7 E JCT I-405, King, WA

Built 1973 ADT: 127,706

TINKHAM RD

Over: I-90

11.7 E JCT SR 202, King, WA

Built 1973 ADT: 36,310

15TH ST SW

Over: SR 167

2.3 N PIERCE CO, King, WA

Built 1975 ADT: 90,546

SR 167 NB

Over: SR 18

2.3 E JCT I-5, King, WA

Built 1973 ADT: 57,729

SR 167

Over: SR 18

2.3 E JCT I-5, King, WA

Built 1973 ADT: 57,729

NB RAMP

Over: N-E RAMP

2.7 N PIERCE CO, King, WA

Built 1975 ADT: 10,288

SR 167 RAMP

Over: SR 18

2.3 E JCT I-5, King, WA

Built 1974 ADT: 57,729

RAMP

Over: I-90, RAMPS, CITY STREET

1.7 E JCT I-405, King, WA

Built 1973 ADT: 127,706

148TH ST-W RAMP

Over: I-90 WBCD RAMP

1.7 E JCT I-405, King, WA

Built 1973 ADT: 2,858

I-405

Over: SE 8TH ST OC

1.7 N JCT I-90, King, WA

Built 1972 ADT: 19,658

SE 231ST ST

Over: SR 18

4.3 E JCT SR 516, King, WA

Built 1972 ADT: 26,396

S EASTGATE PEDESTR

Over: I-90 RAMPS

1.7 N JCT I-405, King, WA

Built 1973 ADT: 7,357

N EASTGATE PEDESTR

Over: EASTGATE WAY & W-S RAMP

1.7 E JCT I-405, King, WA

Built 1973 ADT: 2,858

PEDESTRIAN

Over: I-90

3.3 E JCT I-405, King, WA

Built 1973 ADT: 113,791

I-90

Over: HOMESTEAD VALLEY RD

7.5 E JCT SR 202, King, WA

Built 1974 ADT: 213

I-90

Over: HOMESTEAD VALLEY RD

7.5 E JCT SR 202, King, WA

Built 1974 ADT: 213

I-90

Over: SR 18

12.1 E JCT SR 169, King, WA

Built 1975 ADT: 21,327

I-90

Over: HIGH POINT RD

4.4 E JCT SR 900, King, WA

Built 1975 ADT: 931

436TH AVE SE

Over: I-90

2.3 E JCT SR 202, King, WA

Built 1976 ADT: 37,344

SE 82ND ST

Over: I-90

6.7 E JCT SR 900, King, WA

Built 1975 ADT: 55,271

W-S RAMP I-90

Over: I-90

2.2 E JCT SR 900, King, WA

Built 1976 ADT: 59,685

142ND PL SE

Over: I-90, RAMPS, CITY STREET

1.2 E JCT I-405, King, WA

Built 1976 ADT: 127,706

I-90

Over: SR 202

8.8 E JCT SR 203, King, WA

Built 1976 ADT: 10,067

I-90

Over: SR 202

8.8 E JCT SR 203, King, WA

Built 1975 ADT: 10,067

SR 520

Over: WLS PKWY & SAMMAMISH R

4.9 E JCT I-405, King, WA

Built 1976 ADT: 38,940

PEDESTRIAN TRAFFIC

Over: I-405

2.0 N JCT SR 520, King, WA

Built 1978 ADT: 175,928

CLOSED S 176TH ST

Over: SR 509

5.2 N JCT SR 516, King, WA

Built 1979 ADT: 28,216

SR 509

Over: DES MOINES MEMORIAL

5.8 N JCT SR 516, King, WA

Built 1979 ADT: 5,467

NE 40TH ST

Over: SR 520

3.2 E JCT I-405, King, WA

Built 1980 ADT: 61,404

EQUESTRIAN TRAFFIC

Over: SR 520

4.3 E JCT I-405, King, WA

Built 1980 ADT: 61,404

SR 509

Over: SR 509/DES MOINES MEM

4.7 N JCT SR 516, King, WA

Built 1979 ADT: 9,478

SR 18

Over: SR 516

4.1 E JCT SR 515, King, WA

Built 1979 ADT: 26,572

FLYER STOP PED TRF

Over: SB 405 OFF RAMP TO 72ND

2.6 N JCT SR 520, King, WA

Built 1980 ADT: 5,919

148TH AVE

Over: SR 520

2.3 E JCT I-405, King, WA

Built 1981 ADT: 86,292

NE 30TH ST

Over: SR 405

1.1 N JCT SR 900, King, WA

Built 1981 ADT: 136,172

TALBOT HILL PED.

Over: SR 515

6.2 N JCT SR 516, King, WA

Built 1983 ADT: 23,820

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.