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)

Sort:

92 ND ST SE

Over: PILCHUCK R.

0.54 W INT SR2, Snohomish, WA

Built 1948 Load: 34.5 t ADT: 13,700

196TH ST S.E.

Over: NORTH CREEK

0.2 W JCT SR 527, Snohomish, WA

Built 1969 Load: 34.5 t ADT: 579

SCHERRER RD

Over: CATTLE PASS

3.1 SE JCT SR 92, Snohomish, WA

Built 1985 Load: 34.5 t ADT: 42

MARINE DRIVE

Over: QUILCEDA CREEK

0.5 NW JCT I-5, Snohomish, WA

Built 1988 Load: 34.5 t ADT: 16,620

MOUNTAIN LOOP HWY

Over: TURLO CREEK

10.6 MI E JCT SR 92, Snohomish, WA

Built 1995 Load: 34.5 t ADT: 3,212

5TH ST

Over: BOEING RR ACCESS

0.6 E JCT SR 525, Snohomish, WA

Built 1969 Load: 35.3 t ADT: 5,000

I-5

Over: STILLAGUAMISH R

0.7 N JCT SR 530, Snohomish, WA

Built 1971 Load: 35.4 t ADT: 43,620

LOCUST WAY

Over: SWAMP CREEK

1.9 N KING CO LINE, Snohomish, WA

Built 1993 Load: 35.4 t ADT: 3,514

US 2

Over: EBEY SLOUGH

1.0 E JCT I-5, Snohomish, WA

Built 1993 Load: 36.3 t ADT: 38,740

MOUNTAIN LOOP HWY

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

Over: CENTENNIAL TRAIL

0.6 W SR9, Snohomish, WA

Built 1998 Load: 36.3 t ADT: 5,481

RD. NO. 20

Over: S FORK SAUK RIVER

MP 31.2 RD. NO. 20, Snohomish, WA

Built 1978 Load: 36.8 t ADT: 140

I-5

Over: UNION SLOUGH

3.3 N JCT US 2, Snohomish, WA

Built 1968 Load: 37.2 t ADT: 63,840

I-5

Over: UNION SLOUGH

3.3 N JCT US 2, Snohomish, WA

Built 1968 Load: 37.2 t ADT: 63,840

SR 526

Over: AIRPORT RD

1.4 E JCT SR 525, Snohomish, WA

Built 1969 Load: 37.2 t ADT: 29,446

SR 9

Over: PEDESTRAIN TRAIL

1.8 N JCT SR 528, Snohomish, WA

Built 1957 Load: 38.1 t ADT: 15,892

SR 9

Over: 2ND ST

2.6 N JCT SR 96, Snohomish, WA

Built 1963 Load: 38.1 t ADT: 28,331

SR 522

Over: W MAIN STREET

9.1 E JCT SR 9, Snohomish, WA

Built 1970 Load: 38.1 t ADT: 15,235

RD. NO. 20

Over: BEDAL CREEK

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

Built 1978 Load: 38.1 t ADT: 140

MOUNTAIN LOOP HWY

Over: DUTCH CREEK

8.0 SE DARRINGTON, Snohomish, WA

Built 2003 Load: 39.0 t ADT: 644

SR 530

Over: N FK STILLAGUAMISH R

7.6 E JCT SR 9, Snohomish, WA

Built 1966 Load: 39.9 t ADT: 5,322

I-405

Over: DAMSON RD

2.2 N JCT SR 527, Snohomish, WA

Built 1968 Load: 39.9 t ADT: 60,143

228TH ST SE

Over: BEAR CREEK

0.1 W JCT SR 9, Snohomish, WA

Built 1989 Load: 39.9 t ADT: 7,573

SR 203

Over: HASKELL SLOUGH

5.1 N KING CO, Snohomish, WA

Built 1957 Load: 40.8 t ADT: 15,035

SR 522

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

Over: ROESIGER CREEK

10.7 NE JCT SR 2, Snohomish, WA

Built 1985 Load: 40.8 t ADT: 81

MARINE DRIVE

Over: HATT SLOUGH

2.5 S JCT SR532, Snohomish, WA

Built 1985 Load: 40.8 t ADT: 7,160

SAUK PRAIRIE RD

Over: MOUSE CREEK

2.4 NE JCT SR 530, Snohomish, WA

Built 2006 Load: 40.8 t ADT: 712

SR 525

Over: MAPLE RD & ASH WAY

0.4 N JCT I-5, Snohomish, WA

Built 1983 Load: 42.6 t ADT: 32,482

MUKILTEO BLVD

Over: GLENWOOD CREEK

0.1 W JCT GLENWOOD AVE, Snohomish, WA

Built 1979 Load: 42.6 t ADT: 3,083

SR 525

Over: MAPLE RD & ASH WAY

0.4 N JCT I-5, Snohomish, WA

Built 1983 Load: 43.5 t ADT: 32,482

SR 530

Over: MONTAGUE CREEK

14.2 E JCT SR 9, Snohomish, WA

Built 1968 Load: 44.4 t ADT: 3,499

DUBUQUE RD

Over: WEST FORK WOODS CREEK

8.8 NE JCT SR 2, Snohomish, WA

Built 1935 Load: 44.4 t ADT: 2,838

SR 529

Over: BNRR

3.6 N JCT SR 529 SPUR, Snohomish, WA

Built 1993 Load: 44.4 t ADT: 5,671

ROBE-MENZEL ROAD

Over: POND OVERFLOW

0.6 SE JCT SR 92, Snohomish, WA

Built 1997 Load: 44.4 t ADT: 2,828

228TH ST SW

Over: NORTH CREEK

0.5 E INT I405, Snohomish, WA

Built 1999 Load: 44.4 t ADT: 19,782

I-405

Over: 228TH ST

1.3 N KING CO, Snohomish, WA

Built 1968 Load: 45.4 t ADT: 45,734

US 2

Over: SNOHOMISH R,HIGHLAND AVE

0.2 E JCT I-5, Snohomish, WA

Built 2001 Load: 45.4 t ADT: 39,701

WHITTON AV.

Over: S.F.STILLAGUAMISH RIVER

21.6 E JCT SR 92, Snohomish, WA

Built 1989 Load: 46.3 t ADT: 18

OLD SR9

Over: PILCHUCK CR

0.2 NE JCT SR9, Snohomish, WA

Built 1916 Load: 48.1 t ADT: 63

Pacific Avenue

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

Over: THOMAS CREEK

4.5 E JCT I5, Snohomish, WA

Built 2000 Load: 49.9 t ADT: 16,353

YEAGER RD

Over: WEST FORK WOODS CREEK

3.0 NE JCT SR 2, Snohomish, WA

Built 1968 Load: 50.8 t ADT: 1,436

YEAGER RD

Over: WEST FORK WOODS CREEK

2.6 NE JCT SR 2, Snohomish, WA

Built 1968 Load: 50.8 t ADT: 1,596

PIONEER HWY

Over: CEDAR HOME RD

0.1 N JCT SR532, Snohomish, WA

Built 2002 Load: 53.1 t ADT: 4,500

LUNDEEN PARK WAY

Over: TRIB WEISER CR

0.1 N JCT SR204, Snohomish, WA

Built 2005 Load: 54.4 t ADT: 4,115

ROAD

Over: PROCTOR CREEK

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

Built 1981 Load: 54.5 t ADT: 8

SR 92

Over: CENTENNIAL TRAIL

2.4 E JCT SR 9, Snohomish, WA

Built 1996 Load: 55.3 t ADT: 12,468

NO DATA ENTERED

Over: CONN CREEK

NO DATA ENTERED, Snohomish, WA

Built 2010 Load: 55.4 t ADT: 50

NO DATA ENTERED

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 public datasets. See our methodology for details. Retrieved and formatted by PlainBridges

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Compiled by PlainBridges, Independent data publisher

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.