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:

BNSF RR

Over: LINCOLN AVE.

0.6 S JCT SR 2, Snohomish, WA

Built 1910 ADT: 4,539

BNSF RR

Over: INDEX-GALENA RD.

0.9 E JCT SR 2, Snohomish, WA

Built 1961 ADT: 718

PEDESTRIAN

Over: SR 529/W MARINE VIEW DR

1.2 N JCT SR 529 SPUR, Snohomish, WA

Built 1991 ADT: 13,663

FED.AV.PED.TRAFFIC

Over: E MUKILTEO BOULEVARD

0.9 MI W OF JCT I5, Snohomish, WA

Built 1993 ADT: 14,100

TULALIP PED BRIDGE

Over: MARINE DR

6.1 NE JCT I5, Snohomish, WA

Built 1997 ADT: 8,565

156TH ST NE

Over: INTERSTATE 5

8.9 N JCT SR 528, Snohomish, WA

Built 2012 ADT: 109,515

BNSF RAILROAD

Over: NORMAN ROAD

1.2 W JCT PIONEER HWY, Snohomish, WA

Built 2013 ADT: 609

LOWELL-SNOH RIV RD

Over: MARSHLAND FLOOD CANAL

0.9 E Jct I-5, Snohomish, WA

Built 1963 Load: 9.4 t ADT: 5,544

86TH ST SE

Over: PILCHUCK RIVER

0.7 SE JCT SR 2, Snohomish, WA

Built 1924 Load: 11.0 t ADT: 421

I-5 SB

Over: RAILROAD

3.8 N JCT SR 527, Snohomish, WA

Built 1967 Load: 12.6 t ADT: 88,747

I-5

Over: 52ND AVE W

2.3 N JCT SR 104, Snohomish, WA

Built 1963 Load: 13.0 t ADT: 96,309

MOUNTAIN LOOP HWY.

Over: PERRY CREEK

26.2 E JCT SR 92, Snohomish, WA

Built 1958 Load: 14.5 t ADT: 444

MOUNTAIN LOOP HWY.

Over: WISCONSIN CREEK

14.7 E JCT SR 92, Snohomish, WA

Built 1960 Load: 14.5 t ADT: 1,118

I-5

Over: 212TH ST SW

2.2 N JCT SR 104, Snohomish, WA

Built 1963 Load: 14.6 t ADT: 96,309

I-5

Over: SMITH AVE

3.7 N JCT SR 527, Snohomish, WA

Built 1967 Load: 14.6 t ADT: 88,747

MOUNTAIN LOOP HWY.

Over: S.F. STILLAGUAMISH RIVER

12.1 E JCT SR 92, Snohomish, WA

Built 1954 Load: 14.6 t ADT: 1,756

164th Street SE

Over: North Creek

0.2 W JCT SR 527, Snohomish, WA

Built 1967 Load: 14.9 t ADT: 36,800

I-5 NB

Over: RAILROAD

3.8 N JCT SR 527, Snohomish, WA

Built 1967 Load: 15.2 t ADT: 88,747

MOUNTAIN LOOP HWY.

Over: S.F. STILLAGUAMISH RIVER

18.2 E JCT SR 92, Snohomish, WA

Built 1954 Load: 15.2 t ADT: 824

311 TH AVE SE

Over: SHINGLEBOLT SLOUGH

0.2 S JCT. SR 2, Snohomish, WA

Built 1962 Load: 15.4 t ADT: 1,793

SR 104

Over: PUGET SOUND @ EDMONDS

0.1 W JCT SR 524, Snohomish, WA

Built 1995 Load: 16.3 t ADT: 5,870

HILLIS RD

Over: GRANT CREEK

0.4 NW JCT SR 530, Snohomish, WA

Built 1978 Load: 17.2 t ADT: 348

NORMAN RD

Over: STILLAGUAMISH RIVER

1.5 SW JCT SR 530, Snohomish, WA

Built 1963 Load: 17.2 t ADT: 459

I-5

Over: 300TH ST NW/FREEBORN RD

2.4 N JCT SR 532, Snohomish, WA

Built 1957 Load: 18.1 t ADT: 31,489

ENGLISH GRADE RD

Over: TRIB.TOM MOORE SL./SKAGI

0.5 S SKAGIT CO., Snohomish, WA

Built 1987 Load: 18.1 t ADT: 163

JW MANN ROAD

Over: SKYKOMISH RIVER

0.1 S JCT SR 2, Snohomish, WA

Built 1961 Load: 18.1 t ADT: 1,793

WHITMAN RD

Over: N.F. STILLAGUAMISH RIVER

0.1 N JCT SR 530, Snohomish, WA

Built 1980 Load: 18.1 t ADT: 135

MOUNTAIN LOOP HWY.

Over: BUCK CREEK

28.4 E JCT SR 92, Snohomish, WA

Built 1960 Load: 18.1 t ADT: 923

I-5

Over: 44TH AVE NW

4.1 N JCT SR 532, Snohomish, WA

Built 1971 Load: 18.5 t ADT: 32,189

REITER ROAD

Over: DEER CREEK

2.3 NE JCT SR 2, Snohomish, WA

Built 1978 Load: 18.5 t ADT: 117

SR 104

Over: PUGET SOUND @ EDMONDS

0.1 W JCT SR 524, Snohomish, WA

Built 1953 Load: 19.0 t ADT: 5,870

US 2

Over: WALLACE RIVER

11.6 E JCT SR 203, Snohomish, WA

Built 1940 Load: 19.0 t ADT: 13,494

INDEX-GALENA RD

Over: TROUT CREEK

6.1 NE JCT SR 2, Snohomish, WA

Built 1966 Load: 19.0 t ADT: 128

MOUNTAIN LOOP HWY.

Over: SCHWEITZER CREEK

15.8 E JCT SR 92, Snohomish, WA

Built 1952 Load: 19.0 t ADT: 1,666

RD. NO. 25

Over: STRAIGHT CREEK

M.P. 3.17 RD. NO. 25, Snohomish, WA

Built 1963 Load: 19.1 t ADT: 24

Woodway Park Road

Over: DEER CRK-DEER PRK RESERV

1.0 S SR 104, Snohomish, WA

Built 1929 Load: 19.1 t ADT: 1,950

ROAD

Over: N FK SKYKOMISH RIVER

0.1 MI N OF 63/6335 JCT, Snohomish, WA

Built 1963 Load: 20.0 t ADT: 10

MOUNTAIN LOOP HWY.

Over: BOARDMAN CREEK

16.9 E JCT SR 92, Snohomish, WA

Built 1952 Load: 20.0 t ADT: 1,666

OAKES AVENUE

Over: BURLINGTON NORTHERN RR

0.1MI N. OF HEWITT, Snohomish, WA

Built 1989 Load: 20.0 t ADT: 1,312

US 2

Over: SULTAN MILL POND

8.2 E JCT SR 203, Snohomish, WA

Built 1952 Load: 20.4 t ADT: 19,842

I-5

Over: STEAMBOAT SLOUGH

4.1 N JCT US 2, Snohomish, WA

Built 1968 Load: 20.4 t ADT: 63,840

I-5

Over: STEAMBOAT SLOUGH

4.1 N JCT US 2, Snohomish, WA

Built 1968 Load: 20.4 t ADT: 63,840

US 2

Over: SULTAN RIVER

7.1 E JCT SR 203, Snohomish, WA

Built 1940 Load: 20.9 t ADT: 22,460

AIRPORT RD

Over: AIRFORCE RD

0.79 S JCT SR 526, Snohomish, WA

Built 1967 Load: 20.9 t ADT: 21,004

ROAD

Over: BECKLER RIVER

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

Built 1953 Load: 21.7 t ADT: 44

US 2

Over: PROCTOR CREEK

16.2 E JCT SR 203, Snohomish, WA

Built 1933 Load: 21.8 t ADT: 6,711

SR 203

Over: OVERFLOW SL

2.9 N KING CO, Snohomish, WA

Built 1954 Load: 21.8 t ADT: 11,836

I-5

Over: 212TH ST SW

2.2 N JCT SR 104, Snohomish, WA

Built 1963 Load: 21.8 t ADT: 96,309

ROAD

Over: RAPID RIVER

1.4 MI NE OF 65/6530 JCT, Snohomish, WA

Built 1967 Load: 21.8 t ADT: 8

ROAD

Over: RAPID RIVER

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

Built 1954 Load: 21.8 t ADT: 44

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