Snohomish County, WA

516 public highway bridges

Snohomish County Bridge Snapshot

Snohomish County, Washington contains 516 public highway bridges in the FHWA National Bridge Inventory. Roughly 37.8% are rated “Good,” 37.8% “Fair,” 3.7% “Poor,” and 3.7% 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.

516
Total Bridges
37.8%
Good
3.7%
Poor
3.7%
Structurally Deficient

Condition Distribution

Good
37.8% (195)
Fair
37.8% (195)
Poor
3.7% (19)
SD
3.7% (19)

All Bridges (516)

92 ND ST SE

Fair

Over: PILCHUCK R.

0.54 W INT SR2, Snohomish, WA

Built 1948 Load: 34.5 t ADT: 13,700

196TH ST S.E.

Fair

Over: NORTH CREEK

0.2 W JCT SR 527, Snohomish, WA

Built 1969 Load: 34.5 t ADT: 579

SCHERRER RD

Fair

Over: CATTLE PASS

3.1 SE JCT SR 92, Snohomish, WA

Built 1985 Load: 34.5 t ADT: 42

MARINE DRIVE

Fair

Over: QUILCEDA CREEK

0.5 NW JCT I-5, Snohomish, WA

Built 1988 Load: 34.5 t ADT: 16,620

MOUNTAIN LOOP HWY

Fair

Over: TURLO CREEK

10.6 MI E JCT SR 92, Snohomish, WA

Built 1995 Load: 34.5 t ADT: 3,212

5TH ST

Fair

Over: BOEING RR ACCESS

0.6 E JCT SR 525, Snohomish, WA

Built 1969 Load: 35.3 t ADT: 5,000

I-5

Fair

Over: STILLAGUAMISH R

0.7 N JCT SR 530, Snohomish, WA

Built 1971 Load: 35.4 t ADT: 43,620

LOCUST WAY

Fair

Over: SWAMP CREEK

1.9 N KING CO LINE, Snohomish, WA

Built 1993 Load: 35.4 t ADT: 3,514

US 2

Fair

Over: EBEY SLOUGH

1.0 E JCT I-5, Snohomish, WA

Built 1993 Load: 36.3 t ADT: 38,740

MOUNTAIN LOOP HWY

Fair

Over: S.F. STILLAGUAMISH RIVER

1.8 NE JCT SR 92, Snohomish, WA

Built 1934 Load: 36.3 t ADT: 6,285

108TH ST. NE

Fair

Over: CENTENNIAL TRAIL

0.6 W SR9, Snohomish, WA

Built 1998 Load: 36.3 t ADT: 5,481

RD. NO. 20

Fair

Over: S FORK SAUK RIVER

MP 31.2 RD. NO. 20, Snohomish, WA

Built 1978 Load: 36.8 t ADT: 140

I-5

Fair

Over: UNION SLOUGH

3.3 N JCT US 2, Snohomish, WA

Built 1968 Load: 37.2 t ADT: 63,840

I-5

Fair

Over: UNION SLOUGH

3.3 N JCT US 2, Snohomish, WA

Built 1968 Load: 37.2 t ADT: 63,840

SR 526

Fair

Over: AIRPORT RD

1.4 E JCT SR 525, Snohomish, WA

Built 1969 Load: 37.2 t ADT: 29,446

SR 9

Fair

Over: PEDESTRAIN TRAIL

1.8 N JCT SR 528, Snohomish, WA

Built 1957 Load: 38.1 t ADT: 15,892

SR 9

Fair

Over: 2ND ST

2.6 N JCT SR 96, Snohomish, WA

Built 1963 Load: 38.1 t ADT: 28,331

SR 522

Fair

Over: W MAIN STREET

9.1 E JCT SR 9, Snohomish, WA

Built 1970 Load: 38.1 t ADT: 15,235

RD. NO. 20

Fair

Over: BEDAL CREEK

M.P. 35.9 RD. NO. 20, Snohomish, WA

Built 1978 Load: 38.1 t ADT: 140

MOUNTAIN LOOP HWY

Fair

Over: DUTCH CREEK

8.0 SE DARRINGTON, Snohomish, WA

Built 2003 Load: 39.0 t ADT: 644

SR 530

Fair

Over: N FK STILLAGUAMISH R

7.6 E JCT SR 9, Snohomish, WA

Built 1966 Load: 39.9 t ADT: 5,322

I-405

Fair

Over: DAMSON RD

2.2 N JCT SR 527, Snohomish, WA

Built 1968 Load: 39.9 t ADT: 60,143

228TH ST SE

Fair

Over: BEAR CREEK

0.1 W JCT SR 9, Snohomish, WA

Built 1989 Load: 39.9 t ADT: 7,573

SR 203

Fair

Over: HASKELL SLOUGH

5.1 N KING CO, Snohomish, WA

Built 1957 Load: 40.8 t ADT: 15,035

SR 522

Fair

Over: SNOHOMISH R & TESTER RD

6.4 E JCT SR 9, Snohomish, WA

Built 1963 Load: 40.8 t ADT: 15,235

MIDDLE SHORE RD

Fair

Over: ROESIGER CREEK

10.7 NE JCT SR 2, Snohomish, WA

Built 1985 Load: 40.8 t ADT: 81

MARINE DRIVE

Fair

Over: HATT SLOUGH

2.5 S JCT SR532, Snohomish, WA

Built 1985 Load: 40.8 t ADT: 7,160

SAUK PRAIRIE RD

Fair

Over: MOUSE CREEK

2.4 NE JCT SR 530, Snohomish, WA

Built 2006 Load: 40.8 t ADT: 712

SR 525

Fair

Over: MAPLE RD & ASH WAY

0.4 N JCT I-5, Snohomish, WA

Built 1983 Load: 42.6 t ADT: 32,482

MUKILTEO BLVD

Fair

Over: GLENWOOD CREEK

0.1 W JCT GLENWOOD AVE, Snohomish, WA

Built 1979 Load: 42.6 t ADT: 3,083

SR 525

Fair

Over: MAPLE RD & ASH WAY

0.4 N JCT I-5, Snohomish, WA

Built 1983 Load: 43.5 t ADT: 32,482

SR 530

Fair

Over: MONTAGUE CREEK

14.2 E JCT SR 9, Snohomish, WA

Built 1968 Load: 44.4 t ADT: 3,499

DUBUQUE RD

Fair

Over: WEST FORK WOODS CREEK

8.8 NE JCT SR 2, Snohomish, WA

Built 1935 Load: 44.4 t ADT: 2,838

SR 529

Fair

Over: BNRR

3.6 N JCT SR 529 SPUR, Snohomish, WA

Built 1993 Load: 44.4 t ADT: 5,671

ROBE-MENZEL ROAD

Fair

Over: POND OVERFLOW

0.6 SE JCT SR 92, Snohomish, WA

Built 1997 Load: 44.4 t ADT: 2,828

228TH ST SW

Fair

Over: NORTH CREEK

0.5 E INT I405, Snohomish, WA

Built 1999 Load: 44.4 t ADT: 19,782

I-405

Fair

Over: 228TH ST

1.3 N KING CO, Snohomish, WA

Built 1968 Load: 45.4 t ADT: 45,734

US 2

Fair

Over: SNOHOMISH R,HIGHLAND AVE

0.2 E JCT I-5, Snohomish, WA

Built 2001 Load: 45.4 t ADT: 39,701

WHITTON AV.

Fair

Over: S.F.STILLAGUAMISH RIVER

21.6 E JCT SR 92, Snohomish, WA

Built 1989 Load: 46.3 t ADT: 18

OLD SR9

Fair

Over: PILCHUCK CR

0.2 NE JCT SR9, Snohomish, WA

Built 1916 Load: 48.1 t ADT: 63

Pacific Avenue

Fair

Over: BNSF RR, Smith Street

Pacific Ave 0.25 Mi E I5, Snohomish, WA

Built 2002 Load: 49.2 t ADT: 8,241

CATHCART WAY

Fair

Over: THOMAS CREEK

4.5 E JCT I5, Snohomish, WA

Built 2000 Load: 49.9 t ADT: 16,353

YEAGER RD

Fair

Over: WEST FORK WOODS CREEK

3.0 NE JCT SR 2, Snohomish, WA

Built 1968 Load: 50.8 t ADT: 1,436

YEAGER RD

Fair

Over: WEST FORK WOODS CREEK

2.6 NE JCT SR 2, Snohomish, WA

Built 1968 Load: 50.8 t ADT: 1,596

PIONEER HWY

Fair

Over: CEDAR HOME RD

0.1 N JCT SR532, Snohomish, WA

Built 2002 Load: 53.1 t ADT: 4,500

LUNDEEN PARK WAY

Fair

Over: TRIB WEISER CR

0.1 N JCT SR204, Snohomish, WA

Built 2005 Load: 54.4 t ADT: 4,115

ROAD

Fair

Over: PROCTOR CREEK

3.5 MI S OF HWY 2/62 JCT, Snohomish, WA

Built 1981 Load: 54.5 t ADT: 8

SR 92

Fair

Over: CENTENNIAL TRAIL

2.4 E JCT SR 9, Snohomish, WA

Built 1996 Load: 55.3 t ADT: 12,468

NO DATA ENTERED

Fair

Over: CONN CREEK

NO DATA ENTERED, Snohomish, WA

Built 2010 Load: 55.4 t ADT: 50

NO DATA ENTERED

Fair

Over: BLACK CREEK

NO DATA ENTERED, Snohomish, WA

Built 2010 Load: 55.4 t ADT: 50

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