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)

Sort:

GN RY

Over: US 2

16.1 E JCT SR 203, Snohomish, WA

Built 1963 ADT: 6,711

BOEING TRAFFIC

Over: STATE ROUTE 526

1.2 E JCT SR 525, Snohomish, WA

Built 1968 ADT: 39,841

ALDERWOOD MALL PKW

Over: I-5

0.6 N JCT SR 524, Snohomish, WA

Built 1996 ADT: 150,342

GN RY

Over: US 2

21.0 E JCT SR 203, Snohomish, WA

Built 1963 ADT: 5,659

BROADWAY AVE. NB

Over: I-5 RAMPS

0.1 N JCT I-5, Snohomish, WA

Built 1950 ADT: 8,661

I-5

Over: SR 528 4TH ST

JCT I-5, Snohomish, WA

Built 1952 ADT: 25,693

I-5

Over: EBEY SL / SR 529 / RR

6.9 N JCT SR 529 SPUR, Snohomish, WA

Built 1954 ADT: 8,045

SR 529

Over: SR 529/E MARINE VIEW DR

4.5 N JCT SR 529 SPUR, Snohomish, WA

Built 1955 ADT: 11,806

SR 529

Over: SR 529/E MARINE VIEW DR

4.5 N JCT SR 529 SPUR, Snohomish, WA

Built 1955 ADT: 11,806

I-5

Over: SR 532/268TH ST NE

7.2 E SNOHOMISH CO, Snohomish, WA

Built 1957 ADT: 12,622

NP RY

Over: STATE ROUTE 522

JCT SR 9, Snohomish, WA

Built 1962 ADT: 29,880

228TH ST SW

Over: I-5, RAMPS

1.0 N JCT SR 104, Snohomish, WA

Built 1963 ADT: 175,714

I-5 SB TO SR 99 SB

Over: SR 526 EB TO I-5 SB

JCT I-5 & SR 527, Snohomish, WA

Built 1963 ADT: 14,690

SR 99

Over: I-5

2.8 N JCT SR 96, Snohomish, WA

Built 1963 ADT: 122,990

I-5

Over: SR 524 SPUR/44TH AVE W

0.5 E JCT SR 524, Snohomish, WA

Built 1963 ADT: 26,181

I-5

Over: SR 524 SPUR/44TH AVE W

0.5 E JCT SR 524, Snohomish, WA

Built 1963 ADT: 26,181

SR 524

Over: I-5

JCT SR 524, Snohomish, WA

Built 1964 ADT: 150,342

BICKFORD AVE

Over: SR 9

3.9 N JCT SR 96, Snohomish, WA

Built 1963 ADT: 21,748

236TH ST SW

Over: I-5

0.4 N JCT SR 104, Snohomish, WA

Built 1963 ADT: 155,748

SR 530

Over: I-5

2.6 N JCT SR 531, Snohomish, WA

Built 1965 ADT: 76,248

US 2

Over: EBEY SLOUGH AND SR 204

JCT US 2, Snohomish, WA

Built 1968 ADT: 7,066

I-5

Over: SR 529 / PACIFIC AVE

JCT I-5, Snohomish, WA

Built 1966 ADT: 5,124

I-5

Over: SR 529 - PACIFIC AVE

JCT I-5, Snohomish, WA

Built 1966 ADT: 5,124

I-5

Over: US 2 EB/HEWITT AVE

BEGIN ROUTE US 2 EB, Snohomish, WA

Built 1966 ADT: 9,181

I-5

Over: US 2 EB/HEWITT AVE

BEGIN ROUTE US 2 EB, Snohomish, WA

Built 1966 ADT: 9,181

I-5

Over: SR 529 SPUR/EVERETT AVE

JCT I-5, Snohomish, WA

Built 1966 ADT: 6,225

I-5

Over: SR 529 SPUR/EVERETT AVE

JCT I-5, Snohomish, WA

Built 1966 ADT: 6,225

N-E RAMP

Over: HEWITT AVE

1.1 N JCT SR 526, Snohomish, WA

Built 1966 ADT: 9,181

75TH ST SE

Over: I-5

0.9 N JCT SR 527, Snohomish, WA

Built 1966 ADT: 186,520

US 2

Over: S-E RAMP

5.0 N JCT SR 527, Snohomish, WA

Built 1967 ADT: 9,973

US 2 WB

Over: S-E RAMP

5.0 N JCT SR 527, Snohomish, WA

Built 1967 ADT: 9,973

I-5

Over: W-S,W-W,S-E RAMPS

JCT US 2, Snohomish, WA

Built 1967 ADT: 24,682

I-5

Over: W-S,W-W,S-E RAMPS

JCT US 2, Snohomish, WA

Built 1967 ADT: 24,682

SR 529 SPUR

Over: I-5 S-E RAMP

5.0 N JCT SR 527, Snohomish, WA

Built 1967 ADT: 9,973

23RD ST

Over: I-5, W-N RAMP

0.6 N JCT US 2, Snohomish, WA

Built 1967 ADT: 149,914

41ST ST

Over: BROADWAY

JCT I-5, Snohomish, WA

Built 1967 ADT: 29,379

US 2

Over: SR 204

JCT US 2, Snohomish, WA

Built 1967 ADT: 7,679

12TH ST NE

Over: I-5

2.4 N JCT US 2, Snohomish, WA

Built 1967 ADT: 127,680

I-5

Over: SNOHOMISH RIVER, RR

1.0 N JCT US 2, Snohomish, WA

Built 1968 ADT: 11,309

I-5

Over: SNOHOMISH R GN RY

1.0 N JCT US 2, Snohomish, WA

Built 1968 ADT: 11,309

SR 527

Over: I-405

1.7 N KING CO, Snohomish, WA

Built 1968 ADT: 91,468

I-5

Over: SR 529 NB, RAMP

JCT I-5, Snohomish, WA

Built 1968 ADT: 8,045

I-5

Over: SR 529 NB, RAMP

JCT I-5, Snohomish, WA

Built 1968 ADT: 8,180

I-5

Over: SR529,RR,EBEY SL,60TH PL

6.9 N JCT SR 529 SPUR, Snohomish, WA

Built 1969 ADT: 8,045

S-E RAMP

Over: SR 526 MAINLINE

2.2 E JCT SR 525, Snohomish, WA

Built 1969 ADT: 39,802

PED BEVERLY LANE

Over: SR 526

3.5 E JCT SR 525, Snohomish, WA

Built 1969 ADT: 58,767

EVERGREEN WAY

Over: SR 526

3.5 E JCT SR 525, Snohomish, WA

Built 1969 ADT: 58,767

200TH ST NE

Over: I-5

1.7 N JCT SR 531, Snohomish, WA

Built 1970 ADT: 91,766

STIMSON RD

Over: I-5

4.6 N JCT SR 528, Snohomish, WA

Built 1970 ADT: 109,515

N-W RAMP P1 18853

Over: I-5, SR 527, BROADWAY AV

5.4 N JCT SR 525, Snohomish, WA

Built 1970 ADT: 34,151

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

Reviewed byPlainbridges Editorial, Plain Bridges Editorial Team · June 6, 2026