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:

BROADWAY AVE

Over: I-5 TO SR 526 RAMP

2.8 N JCT SR 96, Snohomish, WA

Built 1970 ADT: 19,797

BROADWAY

Over: SR 526 E-S RAMP

JCT I-5 & SR 527, Snohomish, WA

Built 1970 ADT: 14,690

I-5

Over: SR 528 4TH ST

JCT I-5, Snohomish, WA

Built 1971 ADT: 25,693

SR 522

Over: US 2 & BN RR

8.3 E JCT SR 9, Snohomish, WA

Built 1971 ADT: 28,656

I-5

Over: SR 532 / 268TH ST NE

7.2 E SNOHOMISH CO, Snohomish, WA

Built 1971 ADT: 12,622

TULALIP RR

Over: I-5

3.2 N JCT SR 528, Snohomish, WA

Built 1971 ADT: 98,781

5TH AVE

Over: SR 104 WB

1.0 E JCT SR 524, Snohomish, WA

Built 1971 ADT: 5,358

236TH ST NE

Over: I-5

1.6 N JCT SR 530, Snohomish, WA

Built 1975 ADT: 79,965

SR 99

Over: SR 104

3.3 E JCT SR 524, Snohomish, WA

Built 1975 ADT: 22,067

SR 9

Over: US 2

2.6 E JCT SR 204, Snohomish, WA

Built 1979 ADT: 17,044

164TH ST SW

Over: I-5

1.3 N JCT I-405, Snohomish, WA

Built 1963 ADT: 154,119

I-405

Over: SR 524 (FILBERT RD)

1.5 E JCT I-5, Snohomish, WA

Built 1968 ADT: 21,475

I-405

Over: SR 524 (FILBERT RD)

1.5 E JCT I-5, Snohomish, WA

Built 1968 ADT: 21,475

I-5

Over: S 405 & N 525 RAMPS

1.4 N JCT SR 524, Snohomish, WA

Built 1980 ADT: 25,480

MAPLE ROAD

Over: I-5

0.3 N JCT I-405, Snohomish, WA

Built 1962 ADT: 134,243

164TH ST SW

Over: SR 525

1.4 N JCT I-5, Snohomish, WA

Built 1980 ADT: 56,760

148TH ST SW

Over: SR 525

2.4 N JCT I-5, Snohomish, WA

Built 1980 ADT: 56,760

I-405

Over: I-5

1.4 N JCT SR 524, Snohomish, WA

Built 1981 ADT: 134,243

I-405 NB TO I-5 SB

Over: RAMPS AND SWAMP CREEK

1.4 N JCT SR 524, Snohomish, WA

Built 1981 ADT: 15,523

I-405

Over: I-5

1.4 N JCT SR 524, Snohomish, WA

Built 1982 ADT: 134,243

THREE LAKES RD

Over: US 2

2.1 E JCT SR 9, Snohomish, WA

Built 1983 ADT: 22,670

88TH ST SE

Over: US 2

3.3 E JCT SR 9, Snohomish, WA

Built 1983 ADT: 19,400

220TH ST SW

Over: I-5

1.5 N JCT SR 104, Snohomish, WA

Built 1963 ADT: 159,714

SR 527

Over: I-5

2.8 N JCT SR 96, Snohomish, WA

Built 1987 ADT: 122,990

SR 96(128TH ST SW)

Over: I-5

3.8 N JCT I-405, Snohomish, WA

Built 1987 ADT: 144,746

US 2 RAMP

Over: US 2 WB, SR 204, RAMPS

JCT US 2, Snohomish, WA

Built 1993 ADT: 7,066

US 2 RAMP

Over: US 2 WB, SR 204

JCT US 2, Snohomish, WA

Built 1993 ADT: 7,066

I-5 RAMP

Over: NBCD

3.0 N JCT SR 523, Snohomish, WA

Built 1995 ADT: 12,344

S-S RAMP

Over: S-E RAMP

3.2 N JCT SR 523, Snohomish, WA

Built 1995 ADT: 11,927

SR 526 E-N RAMP

Over: I-5 BROADWAY AVE

JCT I-5 & SR 527, Snohomish, WA

Built 1995 ADT: 34,151

88TH ST NE

Over: I-5

1.6 N JCT SR 528, Snohomish, WA

Built 1996 ADT: 110,463

SR 9

Over: SR 522

0.6 E KING CO, Snohomish, WA

Built 1997 ADT: 29,880

SR 525

Over: SR 99

3.8 N JCT SR 524, Snohomish, WA

Built 2001 ADT: 37,579

RAMP

Over: SB I-5

2.9 N JCT SR 104, Snohomish, WA

Built 2004 ADT: 81,547

I-5 HOV LANES

Over: SR 524 SPUR/44TH AVE W

0.5 E JCT SR 524, Snohomish, WA

Built 2004 ADT: 26,181

SR 531

Over: I-5

7.0 N JCT SR 528, Snohomish, WA

Built 2005 ADT: 74,462

ASH WAY ACCESS

Over: I-5 SB

1.5 N JCT I-405, Snohomish, WA

Built 2005 ADT: 77,060

N-N RAMP

Over: I-5

3.1 N JCT SR 527, Snohomish, WA

Built 2006 ADT: 186,520

I-5 SB

Over: NB & SB HOV RAMPS

3.8 N JCT SR 527, Snohomish, WA

Built 2007 ADT: 2,017

41ST ST NE

Over: I-5

4.1 N JCT SR 527, Snohomish, WA

Built 2006 ADT: 153,336

PEDESTRIAN

Over: I-5

0.3 N JCT SR 96, Snohomish, WA

Built 2006 ADT: 144,746

CANYON PARK PED

Over: I-405

1.6 N KING CO, Snohomish, WA

Built 2007 ADT: 91,468

112TH ST SE

Over: I-5 SB

1.3 N JCT SR 96, Snohomish, WA

Built 2007 ADT: 82,582

112TH ST SE

Over: I-5 NB

1.3 N JCT SR 96, Snohomish, WA

Built 2007 ADT: 82,582

SOUND TRANSIT PED

Over: I-5 NB

0.6 N JCT SR 104, Snohomish, WA

Built 2010 ADT: 77,874

N-W RAMP(BICKFORD)

Over: US 2

1.3 N JCT SR 204, Snohomish, WA

Built 2013 ADT: 37,043

ALDERWOOD M BLVD

Over: SR 524 E-S, I-5 S-E

JCT SR 524, Snohomish, WA

Built 1999 ADT: 6,637

ALDERWOOD MALL BLV

Over: SR 524/196TH ST SW

1.6 E JCT SR 99, Snohomish, WA

Built 1999 ADT: 39,428

PEDESTRIAN

Over: I-5 S-W RAMP

JCT SR 524, Snohomish, WA

Built 2010 ADT: 14,897

116TH ST NE

Over: I-5

3.3 N JCT SR 528, Snohomish, WA

Built 2016 ADT: 98,781

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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