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:

I-90

Over: HIGH POINT RD

4.4 E JCT SR 900, King, WA

Built 1975 Load: 17.8 t ADT: 32,655

FOSS RIVER ROAD

Over: FOSS RIVER

0.8 MI SE SR-2 MP 50.6, King, WA

Built 1951 Load: 17.8 t ADT: 40

NE TOLT HILL RD

Over: SNOQUALMIE RIVER

0.5 MI W OF SR-203, King, WA

Built 2008 Load: 17.8 t ADT: 3,200

SR 513

Over: MONTLAKE CUT

0.2 N JCT SR 520, King, WA

Built 1924 Load: 18.1 t ADT: 54,196

I-405

Over: BNRR & 115 AVE NE

0.2 N JCT SR 520, King, WA

Built 1954 Load: 18.1 t ADT: 65,986

I-90

Over: MERCER SLOUGH

6.4 E JCT I-5, King, WA

Built 1970 Load: 18.1 t ADT: 21,966

436TH AVE SE

Over: S FK SNOQUALMIE

0.8 MI S OF I-90, King, WA

Built 1971 Load: 18.1 t ADT: 7,491

SE 68TH ST

Over: RAGING RIVER

1.9 MI NE OF I-90, King, WA

Built 1915 Load: 18.1 t ADT: 15

W EMERSON ST

Over: 15TH AVE W

W Emerson St /15th Ave W, King, WA

Built 1959 Load: 18.1 t ADT: 17,000

SR 99

Over: N 38TH ST

8.3 N JCT SR 509, King, WA

Built 1932 Load: 18.5 t ADT: 53,501

NE CHERRY VLY RD

Over: CHERRY CREEK

2.6 MI E OF SR-203, King, WA

Built 1960 Load: 18.5 t ADT: 2,704

SR 99

Over: N 50TH ST

9.2 N JCT SR 509, King, WA

Built 1933 Load: 18.8 t ADT: 34,369

PRESTON FALL CITY

Over: RAGING RIVER

0.25 MI S OF SR-202, King, WA

Built 1998 Load: 18.8 t ADT: 9,092

I-405

Over: RR & CITY STREETS

0.2 N JCT SR 181, King, WA

Built 1965 Load: 19.0 t ADT: 153,756

W DRAVUS ST

Over: RAILROAD YARDS

1800 W DRAVUS ST, King, WA

Built 1935 Load: 19.0 t ADT: 26,000

S SPOKANE ST

Over: E MARGINAL WY, 1ST, 4TH

S Spokane St & E Marginal, King, WA

Built 1941 Load: 19.0 t ADT: 42,350

SW SPOKANE ST

Over: DELRIDGE WAY SW

1200 SW Spokane St, King, WA

Built 1983 Load: 19.0 t ADT: 98,700

W GARFIELD ST

Over: 15TH AVE W

1600 15th Ave W, King, WA

Built 1957 Load: 19.0 t ADT: 19,500

196TH AVE NE

Over: EVANS CREEK

0.5 MI N OF SR-202, King, WA

Built 1913 Load: 19.1 t ADT: 397

MT. VIEW RD NE

Over: CHERRY CREEK

3.4 MI E OF SR 203, King, WA

Built 1951 Load: 19.1 t ADT: 1,877

MCGILVRA BLVD E

Over: RAVINE

1000 McGILVRA BLVD E, King, WA

Built 1967 Load: 19.1 t ADT: 1,200

148TH AVE NE

Over: HILLSIDE SLOPE

0.1 MI N OF JCT SR-908, King, WA

Built 1991 Load: 19.1 t ADT: 18,000

BRONSON WAY N

Over: CEDAR R

0.2 MI E JCT SR 515, King, WA

Built 1940 Load: 19.4 t ADT: 22,000

US 2

Over: DECEPTION CR

16.0 E SNOHOMISH CO, King, WA

Built 1940 Load: 19.4 t ADT: 4,871

NE MARYMOOR WAY

Over: SAMMAMISH SLOUGH

0.5 MI S OF SR-520, King, WA

Built 1963 Load: 19.4 t ADT: 1,600

EB I-90

Over: LAKE WASHINGTON

2.3 E JCT I-5, King, WA

Built 1940 Load: 19.8 t ADT: 63,053

I-90

Over: MERCER SLOUGH

6.8 E JCT I-5, King, WA

Built 1970 Load: 19.8 t ADT: 3,203

AVONDALE PL NE

Over: BEAR CREEK

4.75 MI E OF SR-405, King, WA

Built 1950 Load: 19.8 t ADT: 135

FERRY TRAFFIC

Over: PUGET SOUND @ SEATTLE

W END MARION ST, King, WA

Built 1964 Load: 20.0 t ADT: 12,000

83RD AVE S

Over: GREEN RIVER

0.7 MI E OF SR-167, King, WA

Built 1990 Load: 20.0 t ADT: 18,758

WOODINVILLE-DUVALL

Over: SNOQUALMIE RIVER

0.1 MI W OF SR-203, King, WA

Built 1951 Load: 20.1 t ADT: 10,564

DRIVE UHLMAN RD E

Over: GREENWATER RIVER

0.2 MI NE OF SR-410, King, WA

Built 1973 Load: 20.4 t ADT: 80

15TH AVE W

Over: SHIP CANAL

4300 15th Ave W, King, WA

Built 1917 Load: 20.4 t ADT: 60,000

163RD PL SE

Over: WETLAND

163 PL & COUGAR MT WAY, King, WA

Built 2000 Load: 20.4 t ADT: 424

SR 202

Over: OVERFLOW CHANNEL

7.5 E JCT SR 203, King, WA

Built 1925 Load: 20.7 t ADT: 11,250

SR 99

Over: N 46TH ST

9.0 N JCT SR 509, King, WA

Built 1933 Load: 20.7 t ADT: 39,438

LOGAN AVE N

Over: CEDAR RIVER

0.4 MI E JCT SR-167, King, WA

Built 1973 Load: 20.7 t ADT: 37,000

SR 509

Over: THAMES CREEK/PED TRAIL

11.0 N JCT I-705, King, WA

Built 1929 Load: 20.9 t ADT: 3,778

ROAD # 55

Over: CARTER CREEK

2.5 MI SW I-90/55 JCT, King, WA

Built 1993 Load: 20.9 t ADT: 25

ROAD

Over: EAGLE CREEK

5.1 MI N OF 6510/6514 JCT, King, WA

Built 2000 Load: 21.1 t ADT: 5

244TH AVE SE

Over: NEWAUKUM CREEK

0.2 MI N OF SR-164, King, WA

Built 1928 Load: 21.1 t ADT: 4,723

SE 256TH ST

Over: SOOS CREEK

SE 256TH ST @ 148 AVE SE, King, WA

Built 1927 Load: 21.1 t ADT: 8,000

KENT-BLK DIAM RD

Over: BIG SOOS CREEK

1.2 MI S OF SR-18, King, WA

Built 1931 Load: 21.1 t ADT: 7,293

NE 45TH ST

Over: 25TH AVE NE

NE 45th St & 25th Ave NE, King, WA

Built 1938 Load: 21.1 t ADT: 18,000

I-90

Over: E FK ISSAQUAH CREEK

2.2 E JCT SR 900, King, WA

Built 1976 Load: 21.4 t ADT: 29,843

UPPER PRESTON RD

Over: LAKE CREEK

1.8 MI SE OF I-90, King, WA

Built 1950 Load: 21.4 t ADT: 1,112

CUMBERLND-KANASKAT

Over: BNSF RR

@ KANASKET KANGLEY RD, King, WA

Built 1959 Load: 21.4 t ADT: 5,000

OLD CASCADE HWY

Over: MALONEY CREEK

0.5 MI S OF SR-2, King, WA

Built 1982 Load: 21.4 t ADT: 450

I-90

Over: MERCER SLOUGH

6.4 E JCT I-5, King, WA

Built 1970 Load: 21.7 t ADT: 31,000

NE 12TH ST

Over: PARKING LOT

NE 12TH & 124TH NE, King, WA

Built 1971 Load: 21.7 t ADT: 18,028

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.