Snohomish County, WA

516 public highway bridges

Snohomish County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Snohomish County, Washington contains 516 public highway bridges. Roughly 37.8% are rated “Good,” 37.8% “Fair,” and 3.7% “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.

516
Total Bridges
37.8%
Good
37.8%
Fair
3.7%
Poor Condition

Condition Distribution

Good
37.8% (195)
Fair
37.8% (195)
Poor
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 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.