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)

208th ST NE

Good

Over: Vos Creek

4.8 E JCT SR 530, Snohomish, WA

Built 2008 Load: 32.4 t ADT: 145

64Th St. N.E.

Good

Over: Pilchuck River

0.30 E Jct SR 92, Snohomish, WA

Built 2016 Load: 32.4 t ADT: 73

167th Ave SE

Good

Over: Unnamed Wetland

1.0 N SR2, Snohomish, WA

Built 2019 Load: 32.4 t ADT: 100

SB I-5 RAMP

Good

Over: DETENTION VAULT

0.5 N JCT SR 524, Snohomish, WA

Built 2012 Load: 32.7 t ADT: 12,843

RD. NO. 20

Good

Over: ELLIOTT CREEK

M.P. 33.9 RD. # 20, Snohomish, WA

Built 1978 Load: 32.7 t ADT: 140

98TH AVE NW

Good

Over: IRVINE SLOUGH

0.1 S JCT SR 532, Snohomish, WA

Built 1991 Load: 32.7 t ADT: 175

24TH DR SE

Good

Over: WETLAND

0.3 E JCT SR 527, Snohomish, WA

Built 2003 Load: 32.7 t ADT: 837

41st St.

Good

Over: Smith Avenue

0.01 Mi East Jct I-5, Snohomish, WA

Built 2006 Load: 32.7 t ADT: 2,328

137TH ST SE

Good

Over: STREAM

2.0 NW JCT SR 2, Snohomish, WA

Built 2023 Load: 32.7 t ADT: 150

INDEX-GALENA RD

Good

Over: TRIB NF SKYKOMISH RIVER

6.8 NE JCT SR 2, Snohomish, WA

Built 2023 Load: 33.0 t ADT: 190

74th AVE NE

Good

Over: Prairie Creek

0.30 SW JCT SR9, Snohomish, WA

Built 2013 Load: 33.4 t ADT: 1,300

SR 9

Good

Over: RR & CITY STREETS

2.8 N JCT SR 531, Snohomish, WA

Built 1961 Load: 33.6 t ADT: 12,237

US 2

Good

Over: STREAM

25.2 E JCT SR 203, Snohomish, WA

Built 1986 Load: 33.6 t ADT: 5,659

MARSH RD

Good

Over: MARSHLAND FLOODWAY

1.4 W JCT SR 9, Snohomish, WA

Built 1994 Load: 33.6 t ADT: 9,049

SAUK PRAIRIE RD

Good

Over: SAUK RIVER

0.7 NE JCT SR 530, Snohomish, WA

Built 2008 Load: 33.6 t ADT: 801

126th St SE

Good

Over: Unnamed Wetland

3.3 N JCT SR2, Snohomish, WA

Built 2020 Load: 34.0 t ADT: 100

RD. NO. 20

Good

Over: N FORK SAUK RIVER

M.P. 37.2 RD. # 20, Snohomish, WA

Built 1961 Load: 34.5 t ADT: 140

I-5

Good

Over: ABANDONED RR

3.5 N JCT SR 527, Snohomish, WA

Built 1967 Load: 35.4 t ADT: 76,668

I-405

Good

Over: DAMSON RD

2.2 N JCT SR 527, Snohomish, WA

Built 1968 Load: 35.4 t ADT: 60,143

SR 104

Good

Over: 3RD AVE

0.8 E JCT SR 524, Snohomish, WA

Built 1971 Load: 35.4 t ADT: 10,716

E-S RAMP

Good

Over: DEADWATER SLOUGH

1.2 E JCT I-5, Snohomish, WA

Built 2000 Load: 35.4 t ADT: 1,229

212 TH ST NE

Good

Over: PORTAGE CREEK

0.4 MI W JCT SR530, Snohomish, WA

Built 1990 Load: 35.4 t ADT: 1,307

HIGH BRIDGE RD

Good

Over: RICCI CREEK

4.6 N KING CO LINE, Snohomish, WA

Built 1994 Load: 35.4 t ADT: 1,733

SR 522

Good

Over: SNOHOMISH R & TESTER RD

6.4 E JCT SR 9, Snohomish, WA

Built 2013 Load: 35.6 t ADT: 15,235

I-5

Good

Over: PORTAGE CREEK

1.9 N JCT SR 531, Snohomish, WA

Built 1970 Load: 36.0 t ADT: 45,883

SR 530

Good

Over: N FK STILLAGUAMISH RIVER

12.7 E JCT SR 9, Snohomish, WA

Built 1949 Load: 36.3 t ADT: 4,108

SR 525

Good

Over: ALDERWOOD MALL PKWY

0.6 N JCT I-5, Snohomish, WA

Built 1983 Load: 36.3 t ADT: 64,963

SR 530

Good

Over: S FK STILLAGUAMISH R

0.5 E JCT SR 9, Snohomish, WA

Built 1997 Load: 36.3 t ADT: 13,042

FLORENCE ACRES RD

Good

Over: WOODS CREEK

3.5 NE JCT SR 2, Snohomish, WA

Built 1990 Load: 36.3 t ADT: 3,232

OLD OWEN RD

Good

Over: WOODS CREEK

0.3 NE JCT SR2, Snohomish, WA

Built 2004 Load: 36.3 t ADT: 10,281

55th Ave NE

Good

Over: Kackman Creek

4.2 E JCT I-5, Snohomish, WA

Built 2021 Load: 36.9 t ADT: 200

20TH ST SE

Good

Over: EBEY SLOUGH

2.0 E JCT I-5, Snohomish, WA

Built 1995 Load: 37.2 t ADT: 200

CRESCENT LAKE RD.

Good

Over: SNOQUALMIE RIVER

1.3 W JCT SR 203, Snohomish, WA

Built 1996 Load: 37.2 t ADT: 2,317

SR 529

Good

Over: EBEY SLOUGH

0.2 N JCT I-5, Snohomish, WA

Built 2012 Load: 37.9 t ADT: 16,089

RD. NO. 22

Good

Over: WHITE CHUCK RIVER

M.P. 0.1 RD. NO. 22, Snohomish, WA

Built 2008 Load: 37.9 t ADT: 50

HOME ACRES RD

Good

Over: EBEY ISLAND VIADUCT

0.7 E JCT I-5, Snohomish, WA

Built 1968 Load: 38.1 t ADT: 1

SR 530

Good

Over: ASHTON CREEK

24.0 E JCT SR 9, Snohomish, WA

Built 1970 Load: 38.1 t ADT: 3,290

SR 524

Good

Over: NORTH CREEK TRIB

4.1 E JCT I-5, Snohomish, WA

Built 2007 Load: 38.1 t ADT: 17,978

ROAD

Good

Over: FOURTH OF JULY CREEK

7.7 MI N OF HWY 2/65 JCT, Snohomish, WA

Built 2004 Load: 38.1 t ADT: 44

Ash Way

Good

Over: Swamp Creek

0.6 SW JCT i-5, Snohomish, WA

Built 2009 Load: 38.1 t ADT: 7,698

240TH ST SE

Good

Over: NORTH CREEK

2.1 SE JCT I-5, Snohomish, WA

Built 2012 Load: 38.2 t ADT: 5,956

16TH ST NE

Good

Over: LITTLE PILCHUCK CREEK

1.7 S JCT SR 92, Snohomish, WA

Built 2002 Load: 38.6 t ADT: 1,285

State Avenue

Good

Over: Quilceda Creek

1.2 NE JCT I-5, Snohomish, WA

Built 2022 Load: 38.6 t ADT: 16,432

204TH DR SE

Good

Over: STREAM

1.6 NE SR2, Snohomish, WA

Built 2023 Load: 38.9 t ADT: 100

SR 9

Good

Over: 72ND STREET SE

3.7 N JCT SR 96, Snohomish, WA

Built 1963 Load: 39.0 t ADT: 21,748

I-405

Good

Over: 9TH AVE SE

0.4 N JCT SR 527, Snohomish, WA

Built 1968 Load: 39.0 t ADT: 45,734

HOME ACRES ROAD

Good

Over: DEADWATER SLOUGH

0.1 S US 2, Snohomish, WA

Built 1994 Load: 39.0 t ADT: 1,201

FLORENCE ACRES RD

Good

Over: WOODS CREEK

4.6 NE JCT SR 2, Snohomish, WA

Built 2007 Load: 39.0 t ADT: 2,087

SR 522

Good

Over: 179TH SE & 154TH SE

10.1 E JCT SR 9, Snohomish, WA

Built 2013 Load: 39.2 t ADT: 10,512

SR 9

Good

Over: PILCHUCK CREEK

5.3 N JCT SR 530, Snohomish, WA

Built 2014 Load: 39.2 t ADT: 2,295

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