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)

CORNWALL AVENUE

Fair

Over: WHATCOM CREEK

0.07 N JCT FLORA/YORK, Whatcom, WA

Built 1968 Load: 96.9 t ADT: 8,000

OLD SAMISH HWY

Fair

Over: CHUCKANUT CREEK

1.5 E MI CHUCKANUT, Whatcom, WA

Built 1960 Load: 96.9 t ADT: 600

NB SR 539

Good

Over: NOOKSACK R OVERFLOW

1.7 N JCT SR 544, Whatcom, WA

Built 1950 Load: 13.3 t ADT: 8,300

19TH ST

Good

Over: CHUCKANUT CREEK

0.1 S JCT RAINIER AVE, Whatcom, WA

Built 2021 Load: 13.6 t ADT: 20

FERNDALE RD

Good

Over: SLOUGH

01.7 S. SLATER RD., Whatcom, WA

Built 1979 Load: 16.2 t ADT: 1,643

SR 542

Good

Over: GALENA CREEK

27.5 E JCT SR 547, Whatcom, WA

Built 1945 Load: 16.8 t ADT: 621

RIVER RD

Good

Over: FISH TRAP CREEK

01.2 SW FLYNN ROAD, Whatcom, WA

Built 2004 Load: 17.5 t ADT: 140

GARRISON RD

Good

Over: JOHNSON CR

2.6 N JCT SR 546, Whatcom, WA

Built 1945 Load: 18.1 t ADT: 624

SB SR 539

Good

Over: WISER LAKE

0.9 N JCT SR 544, Whatcom, WA

Built 1947 Load: 18.8 t ADT: 8,382

HILLAIRE RD

Good

Over: RED RIVER

0.01 S of N Red River RD, Whatcom, WA

Built 1997 Load: 19.4 t ADT: 284

MARINE DR

Good

Over: MARIETTA SLOUGH

.3 E NOOKSACK R, Whatcom, WA

Built 1978 Load: 20.1 t ADT: 4,009

SR 542

Good

Over: RAZORHONE CREEK

28.4 E JCT SR 547, Whatcom, WA

Built 1946 Load: 20.4 t ADT: 621

I-5

Good

Over: KENTUCKY ST

3.2 N JCT SR 11, Whatcom, WA

Built 1958 Load: 20.4 t ADT: 61,810

I-5

Good

Over: NULLE RD

0.2 N SKAGIT CO, Whatcom, WA

Built 1964 Load: 20.4 t ADT: 22,967

LAKE WHATCOM BLVD

Good

Over: UNNAMED CREEK

01.3 SE LAKE LOUISE, Whatcom, WA

Built 2006 Load: 20.4 t ADT: 1,880

Alaska Ferry

Good

Over: Belligham Bay

.01 N. Harris Ave, Whatcom, WA

Built 1989 Load: 20.7 t ADT: 10

LAUREL RD W

Good

Over: TEN MILE CR

0.3 E.OF N.W. RD., Whatcom, WA

Built 1933 Load: 20.9 t ADT: 961

MOSQUITO LK RD

Good

Over: JOHNSON CR

4.6 NE VALLEY HWY, Whatcom, WA

Built 2004 Load: 20.9 t ADT: 337

KICKERVILLE RD

Good

Over: CALIFORNIA CR

00.2 S LOOMIS TO RD, Whatcom, WA

Built 1956 Load: 21.8 t ADT: 951

HERON LN

Good

Over: JOHNSON CR

00.18 S JONES RD, Whatcom, WA

Built 1944 Load: 22.0 t ADT: 10

RATHBONE RD

Good

Over: BERTRAND CREEK

00.8 S B.B.-LYN. RD, Whatcom, WA

Built 1950 Load: 22.7 t ADT: 1,522

SR 20

Good

Over: THORNTON CREEK

0.6 E SKAGIT CO, Whatcom, WA

Built 1980 Load: 23.3 t ADT: 1,971

ROAD

Good

Over: SULPHUR CR

NO DATA ENTERED, Whatcom, WA

Built 1954 Load: 23.6 t ADT: 30

OLD GUIDE RD

Good

Over: TEN MILE CR

00.1 N W.HEMMI RD, Whatcom, WA

Built 1933 Load: 23.6 t ADT: 887

ARNIE RD

Good

Over: CALIFORNIA CR

00.1 E. VALLEY VIEW, Whatcom, WA

Built 2004 Load: 24.5 t ADT: 190

SR 9

Good

Over: SMITH CREEK

0.5 N JCT SR 542, Whatcom, WA

Built 1946 Load: 24.6 t ADT: 3,984

KELLY RD

Good

Over: ANDERSON CR

00.4 W SAND RD, Whatcom, WA

Built 1939 Load: 24.6 t ADT: 450

HANNEGAN RD

Good

Over: SCOTT DITCH

00.6 N VanDyke, Whatcom, WA

Built 2009 Load: 24.9 t ADT: 9,000

FRASER STREET

Good

Over: CEMETERY CREEK

0.06 W OF VALENCIA ST, Whatcom, WA

Built 2000 Load: 24.9 t ADT: 4,000

SR 9

Good

Over: OVERFLOW CHANNEL

0.1 N JCT SR 542, Whatcom, WA

Built 1945 Load: 25.9 t ADT: 3,984

SR 547

Good

Over: SUMAS RIVER

10.2 N JCT SR 542, Whatcom, WA

Built 1952 Load: 26.2 t ADT: 1,868

SR 546

Good

Over: JOHNSON CREEK

7.2 E JCT SR 539, Whatcom, WA

Built 1961 Load: 26.6 t ADT: 4,524

LINDSAY RD

Good

Over: SUMAS RIVER

00.2 W GARRISON RD, Whatcom, WA

Built 1997 Load: 26.9 t ADT: 267

SR 20

Good

Over: SIDEHILL

8.6 E SKAGIT CO, Whatcom, WA

Built 1962 Load: 28.1 t ADT: 866

SR 9

Good

Over: BLACK SLOUGH

10.0 N SKAGIT CO, Whatcom, WA

Built 1900 Load: 28.8 t ADT: 3,307

SR 9

Good

Over: DRAINAGE CHANNEL

5.9 N SKAGIT CO, Whatcom, WA

Built 1945 Load: 29.0 t ADT: 2,658

ROAD

Good

Over: LITTLE SANDY CREEK

MP16.8 ON RD 11, Whatcom, WA

Built 1964 Load: 29.1 t ADT: 382

NO DATA ENTERED

Good

Over: BEAVER CREEK TRIB.

.67 MILES FROM RD. #11, Whatcom, WA

Built 2003 Load: 29.5 t ADT: 50

ROAD

Good

Over: THOMPSON CREEK

MP 2.0 RD #3910, Whatcom, WA

Built 2003 Load: 29.5 t ADT: 2

NO DATA ENTERED

Good

Over: BEAVER CREEK TRIB.

.51 MILES FROM RD. #11, Whatcom, WA

Built 2003 Load: 29.8 t ADT: 50

SR 20

Good

Over: SKAGIT R

9.6 E SKAGIT CO, Whatcom, WA

Built 1960 Load: 29.9 t ADT: 1,502

SR 539

Good

Over: NOOKSACK R OVERFLOW

1.5 N JCT SR 544, Whatcom, WA

Built 2009 Load: 29.9 t ADT: 16,600

NORTHWOOD RD

Good

Over: FISH TRAP CR

00.2 S E BOUNDARY, Whatcom, WA

Built 1950 Load: 29.9 t ADT: 300

MARINE DR

Good

Over: PORTAGE SLOUGH

0.06 MI. W FERNDALE, Whatcom, WA

Built 1997 Load: 31.8 t ADT: 3,741

SR 544

Good

Over: NOOKSACK RIVER

7.6 E JCT SR 539, Whatcom, WA

Built 1994 Load: 32.7 t ADT: 9,956

DEPOT RD

Good

Over: FISHTRAP CR

0.6 N FRONT ST, Whatcom, WA

Built 1992 Load: 32.7 t ADT: 6,187

Aaron Drive

Good

Over: FISHTRAP CREEK

0.3 S SR 546, Whatcom, WA

Built 1999 Load: 32.7 t ADT: 2,536

SQUALICUM PKWY

Good

Over: SQUALICUM CR

0.1 MI N OF BIRCHWOOD AVE, Whatcom, WA

Built 2020 Load: 32.7 t ADT: 6,200

SR 539

Good

Over: DUFFNER DITCH

3.6 N JCT SR 544, Whatcom, WA

Built 2023 Load: 32.8 t ADT: 14,149

SR 542

Good

Over: SQUALICUM CREEK

3.4 E JCT I-5, Whatcom, WA

Built 2023 Load: 32.8 t ADT: 32,277

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

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.