Whatcom County, WA

358 public highway bridges

Whatcom County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Whatcom County, Washington contains 358 public highway bridges. Roughly 38.3% are rated “Good,” 46.6% “Fair,” and 5.3% “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.

358

Total Bridges

38.3%

Good

46.6%

Fair

5.3%

Poor Condition

Condition Distribution

Good

38.3% (137)

Fair

46.6% (167)

Poor

5.3% (19)

All Bridges (358)

Sort:

I-5 OFF RAMP

Over: SR 539, CREEK

JCT I-5, Whatcom, WA

Built 1988 ADT: 38,656

I-5

Over: IOWA ST

3.1 N JCT SR 11, Whatcom, WA

I-5

Over: SR 539 MERIDIAN ST

JCT I-5, Whatcom, WA

Built 1958 ADT: 38,656

I-5

Over: SR 539 MERIDIAN ST

JCT I-5, Whatcom, WA

Built 1958 ADT: 38,656

ALABAMA ST

Over: I-5

3.5 N JCT SR 11, Whatcom, WA

Built 1958 ADT: 76,839

I-5

Over: NORTHWEST AVE

0.8 N JCT SR 539, Whatcom, WA

I-5

Over: NORTHWEST AVE

0.8 N JCT SR 539, Whatcom, WA

Built 1958 ADT: 49,138

PEDESTRIAN

Over: I-5

3.7 N JCT SR 11, Whatcom, WA

Built 1959 ADT: 76,839

PEDESTRIANS

Over: I-5

3.9 N JCT SR 11, Whatcom, WA

Built 1960 ADT: 57,095

PORTAL WAY

Over: I-5

9.0 N JCT SR 539, Whatcom, WA

Built 1961 ADT: 36,168

MITCHELL AVE

Over: I-5

0.4 N JCT SR 543, Whatcom, WA

Built 1963 ADT: 3,830

H ST

Over: I-5

0.7 N JCT SR 543, Whatcom, WA

Built 1962 ADT: 3,830

SR 548/GRANDVIEW

Over: I-5

9.7 N JCT SR 539, Whatcom, WA

Built 1962 ADT: 22,338

CUSTER SCHOOL RD

Over: I-5, RAMP

3.0 N JCT SR 548, Whatcom, WA

Built 1962 ADT: 27,450

BIRCH BAY-LYNDEN R

Over: I-5

4.3 N JCT SR 548, Whatcom, WA

Built 1961 ADT: 14,164

LOOMIS TRAIL RD

Over: I-5

5.6 N JCT SR 548, Whatcom, WA

Built 1963 ADT: 15,108

I-5

Over: N-W RAMP I-5

8.2 N JCT SR 548, Whatcom, WA

Built 1962 ADT: 12,522

SAMISH WAY

Over: I-5

3.6 N SKAGIT CO, Whatcom, WA

Built 1962 ADT: 47,259

I-5

Over: SR 11 (CONNELLY AVE)

7.2 N SKAGIT CO, Whatcom, WA

Built 1962 ADT: 11,327

I-5

Over: SR 11 (CONNELLY AVE)

7.2 N SKAGIT CO, Whatcom, WA

Built 1962 ADT: 11,327

HUGHES AVE

Over: I-5

8.5 N JCT SR 548, Whatcom, WA

Built 1963 ADT: 12,522

I-5

Over: SR 548 (D ST)

13.8 W JCT I-5, Whatcom, WA

Built 1963 ADT: 5,196

I-5

Over: SR 548 (D ST)

13.8 W JCT I-5, Whatcom, WA

Built 1963 ADT: 5,196

MAIN STREET

Over: I-5

6.3 N JCT SR 539, Whatcom, WA

Built 1968 ADT: 37,728

SR 543

Over: I-5

9.2 N JCT SR 548, Whatcom, WA

Built 1971 ADT: 3,830

SMITH RD

Over: I-5

5.3 N JCT SR 539, Whatcom, WA

Built 1972 ADT: 47,799

SLATER RD

Over: I-5

3.9 N JCT SR 539, Whatcom, WA

Built 1972 ADT: 43,730

BAKERVIEW RD

Over: I-5

1.5 N JCT SR 539, Whatcom, WA

Built 1975 ADT: 42,845

CITY ST TO I-5 NB

Over: I-5

1.7 N JCT SR 539, Whatcom, WA

Built 1976 ADT: 42,845

SR 542 (SUNSET DR)

Over: I-5

4.1 N JCT SR 11, Whatcom, WA

Built 1996 ADT: 57,095

D STREET

Over: SR 543 NORTHBOUND

0.8 N JCT I-5, Whatcom, WA

Built 2007 ADT: 5,649

D STREET

Over: SR 543 SOUTHBOUND

0.8 N JCT I-5, Whatcom, WA

Built 2007 ADT: 5,649

BN RAILROAD

Over: E. MAIN ST

AT HOVANDER RD, Whatcom, WA

Built 1960 ADT: 3,000

Pedestrian Pathway

Over: Alabama Street

0.5 E JCT YEW ST, Whatcom, WA

Built 2002 ADT: 1,650

SAMISH WAY

Over: I-5

1.4 N JCT SR 11, Whatcom, WA

Built 2000 ADT: 47,405

ROAD

Over: SLATE CREEK

MP 1.3 RD 3070, Whatcom, WA

Built 2007 ADT: 50

ELDRIDGE AVENUE

Over: SQUALLICUM CRK-CMSTP&P R

0.07 NW JCT MADRONA ST, Whatcom, WA

Built 1937 Load: 9.1 t ADT: 6,400

GOOSEBERRY SPUR

Over: HALE PASSAGE

2. SW OF CAGEY RD., Whatcom, WA

Built 1950 Load: 10.9 t ADT: 1,300

SUMAS AVE

Over: JOHNSON CR

0.15 N FRONT ST, Whatcom, WA

Built 1970 Load: 11.3 t ADT: 926

BAKER LK RD

Over: ROCKY CR

0.52 N SKAGIT LINE, Whatcom, WA

Built 1956 Load: 11.7 t ADT: 917

SR 548

Over: DAKOTA CREEK

11.5 W JCT I-5, Whatcom, WA

Built 1930 Load: 11.8 t ADT: 7,586

NB SR 539

Over: NOOKSACK R OVERFLOW

2.6 N JCT SR 544, Whatcom, WA

Built 1950 Load: 12.3 t ADT: 8,300

MACK RD

Over: SUMAS RIVER

00.2 W OAT COLES RD, Whatcom, WA

Built 1932 Load: 12.7 t ADT: 106

HILLSIDE RD

Over: SIGITOWITZ CREEK

01.0 S.W. POTTER RD, Whatcom, WA

Built 1950 Load: 13.6 t ADT: 250

GILLIES RD

Over: SUMAS RIVER

00.1 S OF ALM RD., Whatcom, WA

Built 1947 Load: 13.9 t ADT: 263

TURKINGTON RD

Over: JONES CR

00.5 W VALLEY HWY, Whatcom, WA

Built 1951 Load: 14.5 t ADT: 338

HOLLY STREET

Over: WHATCOM CREEK

.3 W OF CITY HALL, Whatcom, WA

Built 1922 Load: 14.5 t ADT: 8,700

ALDRICH RD

Over: TEN MILE CR.

0.2 S W HEMMI RD, Whatcom, WA

Built 1924 Load: 14.6 t ADT: 1,192

ALM RD

Over: SUMAS RIVER

0.4 W GLLES, Whatcom, WA

Built 1947 Load: 14.9 t ADT: 291

NELSON RD

Over: BLACK SLOUGH

00.5 E VALLEY HWY, Whatcom, WA

Built 1934 Load: 15.4 t ADT: 80

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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