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)

SE 261ST STREET

Good

Over: LITTLE SOOS CREEK

0.5 MI N OF SR-18, King, WA

Built 2006 Load: 23.6 t ADT: 350

I-5

Good

Over: NORFOLK ST SEWER

1.0 N JCT SR 900, King, WA

Built 1966 Load: 23.7 t ADT: 101,485

NE 45TH ST

Good

Over: 25TH AVE NE

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

Built 1976 Load: 23.7 t ADT: 25,001

SR 202

Good

Over: BEAR CREEK

7.6 E JCT SR 522, King, WA

Built 1978 Load: 24.5 t ADT: 35,875

SW 16TH STREET

Good

Over: SPRINGBROOK CREEK

0.2 MI S OF I-405, King, WA

Built 1991 Load: 24.5 t ADT: 2,250

SR 203

Good

Over: CLEMONS CREEK

14.6 N JCT SR 202, King, WA

Built 2015 Load: 24.6 t ADT: 12,744

SR 18

Good

Over: CMSTPP RR

0.6 E JCT SR 167, King, WA

Built 1955 Load: 25.3 t ADT: 49,308

SE 244TH ST

Good

Over: TAYLOR CREEK

0.1 S JCT SR 18, King, WA

Built 2005 Load: 25.3 t ADT: 2,212

US 2

Good

Over: TYE RIVER

17.5 E SNOHOMISH CO, King, WA

Built 1947 Load: 25.4 t ADT: 4,871

248 TH AVE SE

Good

Over: NEWAUKUM CREEK

0.2 MI N OF SR-164, King, WA

Built 1939 Load: 25.6 t ADT: 394

PRIVATE DRIVE

Good

Over: LITTLE BEAR CREEK

0.4 N JCT SR 522, King, WA

Built 2006 Load: 25.9 t ADT: 6

140TH AVE NE

Good

Over: KELSEY CREEK

140 NE & BELL-RED RD, King, WA

Built 1972 Load: 25.9 t ADT: 13,668

NORTH FORK RD SE

Good

Over: SUNDAY CREEK

17.4 MI N OF I-90, King, WA

Built 2010 Load: 25.9 t ADT: 70

I-5 RAMP

Good

Over: TERRAIN

5.4 N JCT SR 900, King, WA

Built 1967 Load: 26.6 t ADT: 4,018

ROAD

Good

Over: TUNNEL CREEK

0.5 MI E OF HY 2/6095 JCT, King, WA

Built 1980 Load: 26.6 t ADT: 8

SR 203

Good

Over: DRAINAGE CHANNEL

9.7 N JCT SR 202, King, WA

Built 1946 Load: 26.9 t ADT: 9,247

ROYAL BROUGHAM WAY

Good

Over: RAILROAD

ROYAL BROUGHAM & 4TH AVE, King, WA

Built 2010 Load: 26.9 t ADT: 3,200

I-90 EB ON RAMP

Good

Over: RELIEF

4.4 E JCT I-5, King, WA

Built 1989 Load: 27.2 t ADT: 983

SR 203

Good

Over: DEER CREEK

12.8 N JCT SR 202, King, WA

Built 1946 Load: 27.5 t ADT: 13,128

14/16TH AVE SE

Good

Over: DUWAMISH RIVER

0.8 MI N OF SR-99, King, WA

Built 2014 Load: 27.5 t ADT: 16,000

SR 522

Good

Over: LYON CREEK

1.5 E JCT SR 523, King, WA

Built 2015 Load: 27.9 t ADT: 34,545

150TH PL SE

Good

Over: WETLAND

1.5 MI S OF I-90, King, WA

Built 2002 Load: 27.9 t ADT: 110

15 SW TO SUPERMALL

Good

Over: 15TH ST SW

0.2 MI E OF JCT SR-167, King, WA

Built 1995 Load: 28.1 t ADT: 3,700

I-90

Good

Over: E FK ISSAQUAH CREEK

3.0 E JCT SR 900, King, WA

Built 1976 Load: 28.5 t ADT: 33,574

SE MT. SI RD

Good

Over: MF SNOQUALMIE R

0.9 MI N OF I-90, King, WA

Built 2008 Load: 28.5 t ADT: 3,500

I-90

Good

Over: E FK ISSAQUAH CREEK

2.4 E JCT SR 900, King, WA

Built 1976 Load: 28.8 t ADT: 29,843

SR 18 EASTBOUND

Good

Over: SOOSETTE CREEK

4.7 E JCT SR 164, King, WA

Built 1997 Load: 28.8 t ADT: 27,460

I-5 NBCD

Good

Over: KING JACKSON ST

0.3 N JCT I-90, King, WA

Built 1965 Load: 29.0 t ADT: 55,400

SR 515

Good

Over: GARRISON CREEK

2.1 N JCT SR 516, King, WA

Built 1993 Load: 29.0 t ADT: 26,149

108TH AVE SE

Good

Over: SE 274TH ST

27400 108TH AVE SE, King, WA

Built 1998 Load: 29.2 t ADT: 8,300

NW 195TH CT

Good

Over: BNSF RR

JCT RICH BEACH DR NW, King, WA

Built 2011 Load: 29.2 t ADT: 650

I-90

Good

Over: E FK ISSAQUAH CR

5.6 E JCT SR 900, King, WA

Built 1975 Load: 29.5 t ADT: 32,820

SR 18

Good

Over: SOOS CR

6.7 E JCT SR 164, King, WA

Built 1959 Load: 29.9 t ADT: 25,223

I-5 S-W, N-W RAMPS

Good

Over: AIRPORT WAY

4.1 N JCT SR 900, King, WA

Built 1967 Load: 29.9 t ADT: 12,879

SR 167

Good

Over: 4TH AVE N

1.1 N JCT SR 516, King, WA

Built 1967 Load: 29.9 t ADT: 59,986

SR 167

Good

Over: 4TH AVE N

1.1 N JCT SR 516, King, WA

Built 1967 Load: 29.9 t ADT: 59,986

I-90

Good

Over: S FK SNOQUALMIE RIVER

6.4 E JCT SR 202, King, WA

Built 1971 Load: 29.9 t ADT: 18,493

OAKESDALE AVE SW

Good

Over: SPRINGBROOK CREEK

0.5 M. WEST OF LIND AVE., King, WA

Built 1998 Load: 29.9 t ADT: 7,866

S 277TH ST

Good

Over: UNION PACIFIC RR

0.5 MI EAST OF SR-167, King, WA

Built 2003 Load: 29.9 t ADT: 26,000

ROAD

Good

Over: W FK MILLER RIVER

3.8 MI S OF 6410/OLD HWY, King, WA

Built 1961 Load: 30.0 t ADT: 44

ROAD

Good

Over: GOBLIN CREEK

17 MI NE OF HWY 2/63 JCT, King, WA

Built 1966 Load: 30.0 t ADT: 10

I-405 N-E RAMP

Good

Over: 116TH AVE NE

JCT SR 520, King, WA

Built 1993 Load: 30.5 t ADT: 32,129

W. SUNSET WY

Good

Over: ISSAQUAH CK

0.1 W OF FRONT ST, King, WA

Built 1996 Load: 30.5 t ADT: 9,100

SR 203

Good

Over: SLOUGH

17.2 N JCT SR 202, King, WA

Built 1945 Load: 30.8 t ADT: 10,190

I-5

Good

Over: S 259TH PL

5.6 N JCT SR 18, King, WA

Built 1960 Load: 30.8 t ADT: 100,551

SR 522

Good

Over: NORTH CR & GILLMAN TRAIL

5.9 E JCT SR 104, King, WA

Built 1960 Load: 30.8 t ADT: 12,224

SR 522

Good

Over: NORTH CR & GILLMAN TRAIL

5.9 E JCT SR 104, King, WA

Built 1968 Load: 30.8 t ADT: 11,871

SR 520

Good

Over: 130TH AVE NE

1.0 E JCT I-405, King, WA

Built 1970 Load: 30.8 t ADT: 43,146

SR 520

Good

Over: NE 24TH ST

1.9 E JCT I-405, King, WA

Built 1972 Load: 30.8 t ADT: 43,146

SR 202

Good

Over: SAMMAMISH R

0.4 E JCT SR 522, King, WA

Built 2019 Load: 30.8 t ADT: 8,987

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.