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)

E INTERLAKEN BLVD

Fair

Over: 26TH AVE E

26TH AVE E & INTERLAKEN, King, WA

Built 1912 Load: 11.8 t ADT: 200

I-5

Fair

Over: KING-JACKSON ST

0.3 N JCT I-90, King, WA

Built 1965 Load: 12.3 t ADT: 69,913

SR 520

Fair

Over: PORTAGE BAY

0.3 E JCT I-5, King, WA

Built 1963 Load: 12.6 t ADT: 35,304

I-90

Fair

Over: FRONT ST N

1.3 E JCT SR 900, King, WA

Built 1971 Load: 12.6 t ADT: 30,913

16TH AVE S

Fair

Over: MCSORLEY CREEK

0.1 MI S.OF S 250TH, King, WA

Built 1951 Load: 12.6 t ADT: 10,000

SR 99

Fair

Over: LAKE UNION

7.7 N JCT SR 509, King, WA

Built 1931 Load: 12.7 t ADT: 53,501

E BOSTON TERRACE

Fair

Over: RAVINE

1660 E BOSTON TERRACE, King, WA

Built 1948 Load: 12.7 t ADT: 160

FRANKLIN ROAD

Fair

Over: GREEN RIVER

4.0 MI E OF SR-169, King, WA

Built 1914 Load: 13.0 t ADT: 350

SR 169

Fair

Over: NP RY

10.4 N JCT SR 164, King, WA

Built 1939 Load: 13.3 t ADT: 15,203

NE 159TH ST

Fair

Over: COTTAGE LAKE CREEK

0.1 MI W OF AVONDALE RD, King, WA

Built 1987 Load: 13.3 t ADT: 1,097

I-90 WB ON RAMP

Fair

Over: 224TH AVE NW & TRAIL

1.0 E JCT SR 900, King, WA

Built 1971 Load: 13.6 t ADT: 13,808

I-5

Fair

Over: NBCD VIADUCT STA 2195

0.8 N JCT I-90, King, WA

Built 1964 Load: 13.9 t ADT: 30,675

SE 424TH ST

Fair

Over: NEWAUKUM CREEK

0.5 MI W OF SR-169, King, WA

Built 1950 Load: 13.9 t ADT: 1,500

SE 416TH ST

Fair

Over: NEWAUKUM CREEK

1.1 MI N OF SR-164, King, WA

Built 1950 Load: 14.3 t ADT: 1,592

NE Old Cascade Hwy

Fair

Over: TYE RIVER

0.1 MI S OF SR-2, King, WA

Built 1960 Load: 14.3 t ADT: 40

W DRAVUS ST

Fair

Over: 15TH AVE W

W Dravus St & 15th Ave W, King, WA

Built 1959 Load: 14.5 t ADT: 21,000

DIABLO ACCESS ROAD

Fair

Over: SKAGIT RIVER

Diable Dam, King, WA

Built 1930 Load: 14.5 t ADT: 220

DIABLO DAM ACCESS

Fair

Over: SKAGIT RIVER

Diablo Dam, King, WA

Built 1930 Load: 14.5 t ADT: 220

I-90

Fair

Over: RICHARDS RD

0.2 E JCT I-405, King, WA

Built 1940 Load: 14.6 t ADT: 63,853

W.B. & REV I-90

Fair

Over: LAKE WASHINGTON

2.6 E JCT I-5, King, WA

Built 1989 Load: 14.6 t ADT: 63,053

STATE ROUTE 181

Fair

Over: MILL CR

0.1 MI N OF S 277TH ST, King, WA

Built 1954 Load: 14.9 t ADT: 20,000

E-N RAMP

Fair

Over: CITY STREET, NPRR

2.4 N JCT SR 509, King, WA

Built 1959 Load: 14.9 t ADT: 10,336

10TH AVENUE NW

Fair

Over: SIDE HILL RAVINE

0.1 MI W OF NW INNIS ARD, King, WA

Built 1931 Load: 14.9 t ADT: 730

S FRAGGER ROAD

Fair

Over: MULLEN SLOUGH

0.4 MI S JCT SR-516, King, WA

Built 1950 Load: 14.9 t ADT: 1,600

US 2

Fair

Over: S FORK SKYKOMISH RIVER

10.3 E SNOHOMISH CO, King, WA

Built 1940 Load: 15.2 t ADT: 4,993

I-5

Fair

Over: NORFOLK ST SEWER

1.0 N JCT SR 900, King, WA

Built 1966 Load: 15.2 t ADT: 101,485

WB I-90

Fair

Over: LAKE WASHINGTON

2.3 E JCT I-5, King, WA

Built 1989 Load: 15.2 t ADT: 63,053

15th Ave NE

Fair

Over: COWEN PARK, RAVINE

15th Ave NE & NE 62nd St, King, WA

Built 1936 Load: 15.2 t ADT: 12,100

212TH WAY SE

Fair

Over: GREEN RIVER

0.1 MI S OF GREEN VAL RD, King, WA

Built 1991 Load: 15.2 t ADT: 3,862

OVERLAKE DR

Fair

Over: DEPRESSION

0.6 E JCT 84TH AVE, King, WA

Built 1951 Load: 15.4 t ADT: 1,050

MONSTER ROAD SW

Fair

Over: BLACK RIVER CHANNEL

0.6 MI S JCT SR-900, King, WA

Built 1998 Load: 15.6 t ADT: 10,670

ISSQ-HOBART RD SE

Fair

Over: FIFTEEN MILE CREEK

0.3 MI S OF SE MAY VLY RD, King, WA

Built 1949 Load: 15.9 t ADT: 21,368

HARBOR AVE SW

Fair

Over: SW Avalon Way & Railroad

SW Spokane St & Harbor Av, King, WA

Built 2001 Load: 15.9 t ADT: 1,100

S-ALBRO RAMP

Fair

Over: TERRAIN

3.9 N JCT SR 900, King, WA

Built 1966 Load: 16.2 t ADT: 8,293

FERRY TRAFFIC

Fair

Over: PUGET SOUND @ TAHLEQUAH

SO. END VASHON IS, King, WA

Built 1994 Load: 16.3 t ADT: 1,106

WILLIAMS AVE

Fair

Over: CEDAR RIVER

0.2 M N OF SR 900, King, WA

Built 1954 Load: 16.3 t ADT: 1,825

I-5

Fair

Over: TERRAIN

4.5 N JCT SR 516, King, WA

Built 1966 Load: 16.5 t ADT: 112,452

VASHON HWY SW

Fair

Over: JUDD CREEK

M.P. 5.6 VASHON HWY SW, King, WA

Built 1953 Load: 16.5 t ADT: 4,818

16TH AVE S

Fair

Over: MCSORELY CREEK

1.5 MI N OF HW-99, King, WA

Built 1951 Load: 16.5 t ADT: 10,000

I-5

Fair

Over: KLICKITAT DR

5.0 N JCT SR 516, King, WA

Built 1965 Load: 16.8 t ADT: 112,452

N.W.GILMAN BLVD.

Fair

Over: ISSAQUAH CK.

0.5 MI S OF I-90, King, WA

Built 1940 Load: 16.8 t ADT: 23,500

DAM ACCESS ROAD

Fair

Over: WEYERHAEUSER CO HAUL RD

MUD MOUNTAIN DAM, WA, King, WA

Built 1960 Load: 16.8 t ADT: 75

SR 160

Fair

Over: PUGET SOUND @ PT VASHON

N END VASHON ISLAND, King, WA

Built 1957 Load: 17.2 t ADT: 7,310

I-90

Fair

Over: GARCIA INTERCHANGE

6.5 E JCT SR 202, King, WA

Built 1976 Load: 17.2 t ADT: 18,182

68th Ave NE

Fair

Over: SAMMAMISH RIVER

0.5 MI S OF SR 522, King, WA

Built 1970 Load: 17.2 t ADT: 24,000

FISH HATCHERY RD

Fair

Over: TOKUL CREEK

0.8 MI S OF SR-202, King, WA

Built 1950 Load: 17.2 t ADT: 120

FAUNTLEROY WAY

Fair

Over: ADMIRAL WAY, AVALON WAY

FAUNTLEROY WAY & 35TH AVE, King, WA

Built 1963 Load: 17.2 t ADT: 55,000

W EMERSON PL

Fair

Over: RAILROAD

W EMERSON PL & GILMAN AVE, King, WA

Built 1986 Load: 17.2 t ADT: 21,000

BLACK NUGGET RD

Fair

Over: N FORK ISSAQUAH CREEK

0.2 MI E OF HIGHLAND DR, King, WA

Built 1992 Load: 17.2 t ADT: 400

BALLFIELD ROAD

Fair

Over: TIBBETS CREEK

0.1 MI E OF SR-900, King, WA

Built 1975 Load: 17.2 t ADT: 20

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

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.