Mason County, WA

139 public highway bridges

Mason County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Mason County, Washington contains 139 public highway bridges. Roughly 49.6% are rated “Good,” 38.8% “Fair,” and 3.6% “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.

139
Total Bridges
49.6%
Good
38.8%
Fair
3.6%
Poor Condition

Condition Distribution

Good
49.6% (69)
Fair
38.8% (54)
Poor
3.6% (5)

All Bridges (139)

US 101

Fair

Over: CREEK/RR/STREET

3.1 S JCT SR 102, Mason, WA

Built 1973 Load: 34.3 t ADT: 17,635

US 101

Fair

Over: KENNEDY CREEK

2.7 S JCT SR 108, Mason, WA

Built 1960 Load: 35.0 t ADT: 12,897

US 101

Fair

Over: KENNEDY CREEK

2.7 S JCT SR 108, Mason, WA

Built 1960 Load: 35.0 t ADT: 12,897

US 101

Fair

Over: SKOOKUM CR NP RY

0.3 S JCT SR 108, Mason, WA

Built 1962 Load: 35.4 t ADT: 12,553

US 101

Fair

Over: SKOOKUM CR NP RY

0.3 S JCT SR 108, Mason, WA

Built 1962 Load: 35.4 t ADT: 12,553

SR 119

Fair

Over: BIG CREEK

9.4 N JCT SR 101, Mason, WA

Built 1960 Load: 36.0 t ADT: 513

Old Olympic Highwa

Fair

Over: KENNEDY CREEK

0.40 S JCT SR 101, Mason, WA

Built 1917 Load: 37.2 t ADT: 72

NO DATA ENTERED

Fair

Over: JEFFERSON CREEK

NO DATA ENTERED, Mason, WA

Built 1957 Load: 38.1 t ADT: 50

US 101

Fair

Over: JORSTED CREEK

6.8 S JEFFERSON CO, Mason, WA

Built 1985 Load: 39.9 t ADT: 2,489

NO DATA ENTERED

Fair

Over: CHURCH CREEK

NO DATA ENTERED, Mason, WA

Built 1965 Load: 44.5 t ADT: 50

Shelton Matlock Rd

Fair

Over: NO. FORK GOLDSBOROUGH CK

0.23 E Dayton Airport rd, Mason, WA

Built 1988 Load: 49.0 t ADT: 1,777

E. Mason Lake Rd W

Fair

Over: SCHUMOCHER CREEK

0.73 MI NO OF Mason LK Rd, Mason, WA

Built 2002 Load: 50.8 t ADT: 490

NO DATA ENTERED

Fair

Over: TRIB. TO CANYON RIVER

NO DATA ENTERED, Mason, WA

Built 2004 Load: 54.9 t ADT: 50

NO DATA ENTERED

Fair

Over: ROCK CK.

NO DATA ENTERED, Mason, WA

Built 1975 Load: 97.2 t ADT: 50

NO DATA ENTERED

Fair

Over: SNOW CREEK

NO DATA ENTERED, Mason, WA

Built 2010 Load: 97.2 t ADT: 50

Eckert Road

Good

Over: CASE INLET

0.15 E Grapeview Loop rd, Mason, WA

Built 1920 Load: 13.6 t ADT: 385

US 101

Good

Over: HAMMA HAMMA RIVER

5.3 S JEFFERSON CO, Mason, WA

Built 1924 Load: 16.5 t ADT: 2,489

Skokomish ValleyRd

Good

Over: VANCE CREEK

3.88 W JCT SR 101, Mason, WA

Built 1963 Load: 17.2 t ADT: 494

Shelton Matlock Rd

Good

Over: GOLDSBOROUGH CREEK

4.85 W JCT SR 3, Mason, WA

Built 1956 Load: 17.8 t ADT: 2,079

Little Egypt Rd

Good

Over: SO. FK. GOLDSBOROUGH CK.

1.86 S SheltonMatlock Rd, Mason, WA

Built 1966 Load: 19.0 t ADT: 191

Deckerville Road

Good

Over: DRY BED CREEK

0.59 W JCT Matlock, Mason, WA

Built 1963 Load: 20.9 t ADT: 149

SR 3

Good

Over: DEER CREEK

9.0 N JCT US 101, Mason, WA

Built 1957 Load: 22.7 t ADT: 15,491

Mission Creek Rd

Good

Over: MISSION CREEK

0.40 N JCT SR 300, Mason, WA

Built 1991 Load: 22.7 t ADT: 827

Skokomish Valley R

Good

Over: VANCE CREEK

4.58 W JCT SR101, Mason, WA

Built 1959 Load: 24.5 t ADT: 494

US 101

Good

Over: MILL CREEK

4.9 S JCT SR 102, Mason, WA

Built 1973 Load: 24.9 t ADT: 18,814

Skokomish Valley R

Good

Over: VANCE CREEK

6.19 m W SR 101, Mason, WA

Built 1986 Load: 25.4 t ADT: 110

Shelton Matlock Rd

Good

Over: BINGHAM CREEK

1.3 E MATLOCK, Mason, WA

Built 1960 Load: 25.4 t ADT: 1,437

Beeville Road

Good

Over: DRY BED CREEK

4 Miles N of Matlock, Mason, WA

Built 1984 Load: 25.4 t ADT: 16

Old Belfair Highwa

Good

Over: UNION RIVER

1.19 N JCT SR 300, Mason, WA

Built 1987 Load: 26.3 t ADT: 3,517

Schaffer St Prk Rd

Good

Over: DECKER CREEK

0.59 E JCT MatlockBrady, Mason, WA

Built 1967 Load: 26.3 t ADT: 376

US 101

Good

Over: EAGLE CR

10.1 S JEFFERSON CO, Mason, WA

Built 1950 Load: 26.9 t ADT: 2,944

7TH AVENUE

Good

Over: GOLDSBROUGH CREEK

00.1 S RAILROAD AVE, Mason, WA

Built 1976 Load: 27.2 t ADT: 6,000

BEEVILLE LOOP

Good

Over: RABBIT CREEK

BEEVILLE LOOP, Mason, WA

Built 2010 Load: 27.2 t ADT: 32

NO DATA ENTERED

Good

Over: WALTER CREEK

NO DATA ENTERED, Mason, WA

Built 1967 Load: 28.1 t ADT: 25

NO DATA ENTERED

Good

Over: PINE CREEK

NO DATA ENTERED, Mason, WA

Built 1959 Load: 28.1 t ADT: 25

US 101

Good

Over: FINCH CREEK

17.1 S JEFFERSON CO, Mason, WA

Built 1925 Load: 28.8 t ADT: 4,404

NO DATA ENTERED

Good

Over: LAKE CUSHMAN (N FK SKOK)

N.W. END OF LAKE CUSHMAN, Mason, WA

Built 1959 Load: 30.0 t ADT: 5

NO DATA ENTERED

Good

Over: BAKER CREEK

NO DATA ENTERED, Mason, WA

Built 1964 Load: 30.9 t ADT: 15

NO DATA ENTERED

Good

Over: JEFFERSON CREEK

NO DATA ENTERED, Mason, WA

Built 1975 Load: 30.9 t ADT: 10

US 101

Good

Over: WEAVER CREEK

2.1 S JCT SR 106, Mason, WA

Built 1970 Load: 31.8 t ADT: 7,382

NO DATA ENTERED

Good

Over: LAKE CUSHMAN (N FK SKOK)

N.W. END OF LAKE CUSHMAN, Mason, WA

Built 2011 Load: 32.4 t ADT: 5

SR 106

Good

Over: TWANOH CREEK

12.3 E JCT US 101, Mason, WA

Built 2023 Load: 32.8 t ADT: 2,309

NO DATA ENTERED

Good

Over: BROWN CREEK

NO DATA ENTERED, Mason, WA

Built 1969 Load: 36.3 t ADT: 75

SHELTON-MATLOCK RD

Good

Over: COFFEE CREEK

3.6 S JCT SR 102, Mason, WA

Built 2020 Load: 36.6 t ADT: 1,000

NO DATA ENTERED

Good

Over: LEBAR CREEK

NO DATA ENTERED, Mason, WA

Built 1974 Load: 37.2 t ADT: 25

Skokomish ValleyRD

Good

Over: HUNTER CREEK

1.76 W JCT SR 101, Mason, WA

Built 2015 Load: 37.9 t ADT: 494

US 101 S-N RAMP

Good

Over: WETLAND

5.7 S JCT SR 102, Mason, WA

Built 2008 Load: 38.1 t ADT: 1,151

Schaffer Park Rd

Good

Over: EAST FORK SATSOP RIVER

1.29 E Matlock Brady rd, Mason, WA

Built 1993 Load: 38.1 t ADT: 376

BEAR CR - DEWATTO

Good

Over: DEWATTO RIVER

9.56 W OF BELFAIR HWY, Mason, WA

Built 2008 Load: 38.1 t ADT: 79

Deegan Road West

Good

Over: Coffee Creek

2.35 E Shelton Matlock Rd, Mason, WA

Built 2020 Load: 38.1 t ADT: 187

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.