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:

15TH AVE W

Over: SHILSHOLE AVE NW,

4300 15th Ave W, King, WA

Built 1940 Load: 24.5 t ADT: 52,000

S ALBRO PL

Over: AIRPORT WAY S, RR

S Albro Pl & Airport Way, King, WA

Built 1931 Load: 24.5 t ADT: 13,000

W GARFIELD ST

Over: BNRR

350 FT WEST OF 15TH AVE W, King, WA

Built 1930 Load: 24.5 t ADT: 20,000

SE 80TH ST

Over: KIMBALL CREEK

0.4 MI W OF SR-202, King, WA

Built 1929 Load: 24.6 t ADT: 398

I-5 SB

Over: TERRAIN

5.6 N JCT SR 900, King, WA

Built 1967 Load: 24.9 t ADT: 94,901

196TH AVE NE

Over: EVANS CREEK

0.9 MI N OF SR-202, King, WA

Built 1913 Load: 24.9 t ADT: 500

GRADY WAY

Over: UPRR & BNRR

0.1 MI E OF INTERURBAN, King, WA

Built 1986 Load: 24.9 t ADT: 26,000

I-5 SBCD

Over: TERRAIN

JCT I-90, King, WA

Built 1967 Load: 25.3 t ADT: 24,462

SE AUB-BLK DIA RD

Over: GREEN RIVER

0.2 MI NE OF SR-18, King, WA

Built 1970 Load: 25.3 t ADT: 8,871

SE 416TH ST

Over: NEWAUKUM CREEK

0.9 MI E OF SR-169, King, WA

Built 1958 Load: 25.3 t ADT: 1,874

WELLS AVENUE

Over: CEDAR RIVER

0.4 MI W OF I-405, King, WA

Built 1987 Load: 25.3 t ADT: 2,200

SR 202

Over: KIMBALL CR

4.5 E JCT SR 203, King, WA

Built 1924 Load: 25.4 t ADT: 11,250

SR 202

Over: S FK SNOQUALMIE R

7.7 E JCT SR 203, King, WA

Built 1936 Load: 25.4 t ADT: 11,250

US 2

Over: S FK SKYKOMISH RIVER

8.9 E SNOHOMISH CO, King, WA

Built 1938 Load: 25.4 t ADT: 5,198

SR 169

Over: CEDAR RIVER

0.8 N JCT SR 18, King, WA

Built 1950 Load: 25.4 t ADT: 21,491

US 2

Over: BN RR (GN) SCENIC

18.5 E SNOHOMISH CO, King, WA

Built 1990 Load: 25.4 t ADT: 4,827

300TH AVE SE

Over: PATTERSON CREEK

0.1 MI S OF SR-202, King, WA

Built 1951 Load: 25.4 t ADT: 10

148TH AVE SE

Over: SOOS CREEK

2.5 MI N OF SR-516, King, WA

Built 1971 Load: 25.4 t ADT: 4,306

SEATTLE BLVD

Over: SOUND TRANSIT TUNNEL

Seattle Blvd EO 4th Ave S, King, WA

Built 1910 Load: 25.4 t ADT: 22,000

12 AVE S

Over: DEARBORN ST

12th Ave S & Dearborn St, King, WA

Built 1917 Load: 25.4 t ADT: 22,000

EASTLAKE AVE NE

Over: NE PACIFIC ST

3800 Eastlake Ave, King, WA

Built 1930 Load: 25.4 t ADT: 35,000

EASTLAKE AVE NE

Over: NE 40TH ST, BURKE GILMAN

3800 Eastlake Ave, King, WA

Built 1930 Load: 25.4 t ADT: 37,000

196 - 200 STREET

Over: GREEN RIVER

0.8 MI W OF SR-18, King, WA

Built 1998 Load: 25.4 t ADT: 17,406

I-5

Over: TERRAIN

5.2 N JCT SR 900, King, WA

Built 1967 Load: 25.6 t ADT: 94,901

W NORTH BEND WAY

Over: RIBARY CREEK

3.1 MI E OF I-90, King, WA

Built 1941 Load: 25.6 t ADT: 6,500

WOODINVILLE DUVALL

Over: DUVALL SLOUGH

0.4 MI W OF SR-203, King, WA

Built 1948 Load: 25.9 t ADT: 10,564

SW SPOKANE ST

Over: E MARGINAL WAY S

1200 SW Spokane St, King, WA

Built 1983 Load: 25.9 t ADT: 10,000

SR 99

Over: N 63RD ST

9.8 N JCT SR 509, King, WA

Built 1932 Load: 26.3 t ADT: 32,577

US 2

Over: STREAM

5.8 E SNOHOMISH CO, King, WA

Built 1937 Load: 26.3 t ADT: 5,562

SR 203

Over: SLOUGH

15.8 N JCT SR 202, King, WA

Built 1945 Load: 26.3 t ADT: 10,190

4TH AVE S

Over: RAILROAD STATION

4th Ave S & Jackson St, King, WA

Built 1910 Load: 26.3 t ADT: 13,500

SW ADMIRAL WAY

Over: RAVINE, FAIRMOUNT AVE

4001 SW ADMIRAL WAY, King, WA

Built 1927 Load: 26.3 t ADT: 31,000

W. SNOQ VALLEY RD

Over: TUCK CREEK

JCT W SNOQ VALLEY RD, King, WA

Built 1999 Load: 26.6 t ADT: 5,973

SR 203

Over: HARRIS CREEK

8.2 N JCT SR 202, King, WA

Built 1945 Load: 27.2 t ADT: 9,561

US 2

Over: STREAM

7.0 E SNOHOMISH CO, King, WA

Built 1937 Load: 27.2 t ADT: 5,562

SR 18

Over: PEASLEY CANYON RD

1.9 E JCT I-5, King, WA

Built 1958 Load: 27.2 t ADT: 101,558

I-90

Over: S FK SNOQUALMIE R

6.3 E JCT SR 202, King, WA

Built 1974 Load: 27.2 t ADT: 18,182

S BOEING ACCESS RD

Over: BNRR

0.3 MI W OF E MARGINAL WY, King, WA

Built 1945 Load: 27.2 t ADT: 32,504

236TH AVE SE

Over: NEWAUKUM CREEK

0.5 MI N OF SR-164, King, WA

Built 1927 Load: 27.2 t ADT: 520

COVINGTON-SWYR RD

Over: JENKINS CREEK

0.7 MI SE OF SR-516, King, WA

Built 1929 Load: 27.2 t ADT: 15,015

15TH AVE NW

Over: NW LEARY WAY

15th Ave NW & NW Leary Wy, King, WA

Built 1958 Load: 27.2 t ADT: 60,000

W HOWE ST

Over: 32ND AVE W, RAVINE

3200 W Howe St, King, WA

Built 1946 Load: 27.2 t ADT: 2,300

1ST AVE S

Over: ARGO RR YARD

4500 1st Ave S, King, WA

Built 1935 Load: 27.2 t ADT: 19,000

148TH AVE SE

Over: SOOS CREEK

0.25 MI N OF SE 256TH ST, King, WA

Built 1971 Load: 27.5 t ADT: 2,300

FRONT ST N.

Over: E.FK.ISSAQUAH CK.

0.3 MI S OF I-90, King, WA

Built 1970 Load: 27.5 t ADT: 30,000

Redmond Way

Over: SAMMAMISH R

2.5 MI E JCT I-405, King, WA

Built 1972 Load: 27.9 t ADT: 27,000

I-90

Over: E FK ISSAQUAH CREEK

2.4 E JCT SR 900, King, WA

Built 1976 Load: 27.9 t ADT: 29,843

SR 167

Over: GREEN RIVER

4.7 N JCT SR 18, King, WA

Built 1967 Load: 28.1 t ADT: 65,366

SR 167

Over: GREEN RIVER

4.7 N JCT SR 18, King, WA

Built 1967 Load: 28.1 t ADT: 65,366

I-405 N-E RAMP

Over: SAMMAMISH RIVER

8.7 N JCT SR 520, King, WA

Built 1968 Load: 28.1 t ADT: 23,472

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