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)

Sort:

NP RR

Over: STATE ROUTE 3

3.3 N JCT US 101, Mason, WA

Built 1944 ADT: 10,584

NP RY

Over: STATE ROUTE 3

2.7 N JCT SR 302, Mason, WA

Built 1944 ADT: 12,482

NP RY

Over: STATE ROUTE 3

1.1 N JCT SR 300, Mason, WA

Built 1944 ADT: 18,809

PEDESTRIAN

Over: STATE ROUTE 106

6.6 E JCT US 101, Mason, WA

Built 1977 ADT: 1,300

W CLOQUALLUM RD

Over: US 101

4.5 S JCT SR 102, Mason, WA

Built 1972 ADT: 18,814

US 101

Over: SR 3

JCT US 101, Mason, WA

Built 1972 ADT: 7,545

C ST

Over: US 101

2.8 S JCT SR 102, Mason, WA

Built 1973 ADT: 17,635

US 101

Over: MATLOCK RD

3.4 S JCT SR 102, Mason, WA

Built 1973 ADT: 6,185

US 101

Over: SR 108

7.8 E GRAYS HBR CO, Mason, WA

Built 1986 ADT: 11,436

W. KNEELAND BLVD

Over: US 101

1.7 S JCT SR 102, Mason, WA

Built 1993 ADT: 13,896

GRAVEL CHUTE

Over: SR 3

4.0 N JCT US 101, Mason, WA

Built 2000 ADT: 10,584

23610

Over: CEDAR CREEK

NO DATA ENTERED, Mason, WA

Built 1959 ADT: 50

Arcadia Road

Over: BUR. NOR. RAILROAD

1.45 E JCT SR 3, Mason, WA

Built 1978 Load: 8.2 t ADT: 4,134

PARK ENTRANCE

Over: TWANOH CREEK

TWANOH STATE PARK, Mason, WA

Built 2000 Load: 13.6 t ADT: 125

SR 3

Over: MILL CREEK

0.9 N JCT US 101, Mason, WA

Built 1921 Load: 13.9 t ADT: 14,994

US 101

Over: HAMMA HAMMA RIVER

5.1 S JEFFERSON CO, Mason, WA

Built 1924 Load: 16.5 t ADT: 2,489

Arcadia Rd.

Over: MILL CREEK

4.72 E JCT SR 3, Mason, WA

Built 1971 Load: 17.2 t ADT: 879

North Shore Rd

Over: TAHUYA ESTUARY

0.14 S Belfair Tahuya rd, Mason, WA

Built 1961 Load: 18.1 t ADT: 513

Eich Road

Over: SKOOKUM CREEK

0.26 N JCT SR 108, Mason, WA

Built 1968 Load: 18.1 t ADT: 22

Bourgault Rd

Over: WEAVER CREEK

0.03 W JCT SR101, Mason, WA

Built 1966 Load: 19.0 t ADT: 73

Dewatto Holly rd

Over: DEWATTO RIVER

2.49 NE JCT Dewatto rd, Mason, WA

Built 1967 Load: 19.0 t ADT: 200

North Shore Rd

Over: RENDSLAND CREEK

4.48 W of Belfair Tahuya, Mason, WA

Built 1950 Load: 19.8 t ADT: 526

SR 3

Over: GOLDSBOROUGH CREEK

2.4 N JCT US 101, Mason, WA

Built 1923 Load: 20.1 t ADT: 16,880

SR 3

Over: SHERWOOD CREEK

20.5 N JCT US 101, Mason, WA

Built 1952 Load: 20.1 t ADT: 10,477

Deckerville Road

Over: DECKER CREEK

2.84 W JCT Matlock, Mason, WA

Built 1949 Load: 20.9 t ADT: 149

Beeville Loop Rd

Over: DRY BED CREEK

0.58 W JCT Beeville Rd, Mason, WA

Built 1954 Load: 20.9 t ADT: 86

Steelhead Drive So

Over: MISSION CREEK

0.04 W Mission Cr Rd, Mason, WA

Built 1990 Load: 20.9 t ADT: 950

NO DATA ENTERED

Over: CANYON RIVER

NO DATA ENTERED, Mason, WA

Built 1951 Load: 21.8 t ADT: 50

US 101

Over: LILLIWAUP R

12.6 S JEFFERSON CO, Mason, WA

Built 1925 Load: 22.4 t ADT: 3,048

SR 3

Over: CRANBERRY CREEK

8.6 N JCT US 101, Mason, WA

Built 1957 Load: 22.7 t ADT: 15,429

US 101

Over: WAKETICKEH CREEK

3.9 S JEFFERSON CO, Mason, WA

Built 1982 Load: 22.7 t ADT: 2,336

NO DATA ENTERED

Over: HAMMA HAMMA RIVER

NO DATA ENTERED, Mason, WA

Built 1950 Load: 22.7 t ADT: 30

US 101

Over: SKOKOMISH RIVER

1.8 S JCT SR 106, Mason, WA

Built 1932 Load: 23.6 t ADT: 7,382

SR 108

Over: SKOOKUM CREEK

2.5 E GRAYS HBR CO, Mason, WA

Built 1952 Load: 23.6 t ADT: 3,494

Agate Loop Rd

Over: CAMPBELL CREEK

0.48 N JCT CRESTVIEW DR, Mason, WA

Built 1950 Load: 23.6 t ADT: 257

US 101

Over: SUND CREEK

14.3 S JEFFERSON CO, Mason, WA

Built 1925 Load: 23.7 t ADT: 3,700

SR 302

Over: COULTER CR

1.3 E JCT SR 3, Mason, WA

Built 1956 Load: 24.5 t ADT: 4,208

SR 101

Over: CUSHMAN TAILRACE

19.9 S JEFFERSON CO, Mason, WA

Built 1930 Load: 24.9 t ADT: 7,100

SR 108

Over: SKOOKUM CREEK

6.9 E GRAYS HBR CO, Mason, WA

Built 1952 Load: 25.4 t ADT: 3,852

CO. RD. 90100

Over: DECKER CREEK

6.4 MI SO MATLOCK, Mason, WA

Built 1996 Load: 25.4 t ADT: 588

NO DATA ENTERED

Over: MID FORK SATSOP RIVER

NO DATA ENTERED, Mason, WA

Built 1967 Load: 26.3 t ADT: 50

NO DATA ENTERED

Over: WASHINGTON CREEK

NO DATA ENTERED, Mason, WA

Built 1965 Load: 26.3 t ADT: 10

SR 300

Over: UNION RIVER

2.9 E STATE PARK, Mason, WA

Built 1960 Load: 27.2 t ADT: 11,840

SR 300

Over: MISSION CREEK

0.3 E STATE PARK, Mason, WA

Built 1963 Load: 27.2 t ADT: 7,194

Mission Creek Road

Over: BIG MISSION CREEK

0.79 N JCT SR 300, Mason, WA

Built 1968 Load: 27.2 t ADT: 671

NO DATA ENTERED

Over: N FK SKOKOMISH RIVER

NO DATA ENTERED, Mason, WA

Built 1929 Load: 29.1 t ADT: 50

Mary M Knight Rd

Over: DRY CREEK

0.15 W of MatlockBradyRD, Mason, WA

Built 1970 Load: 29.9 t ADT: 148

NO DATA ENTERED

Over: S FK SKOKOMISH RIVER

NO DATA ENTERED, Mason, WA

Built 1963 Load: 30.0 t ADT: 50

NO DATA ENTERED

Over: BOULDER CREEK

NO DATA ENTERED, Mason, WA

Built 1965 Load: 31.8 t ADT: 25

SR 3

Over: JOHNS CREEK

6.6 N JCT US 101, Mason, WA

Built 1948 Load: 33.7 t ADT: 15,367

Read our methodology - how this data is sourced, computed, and verified.

Related

Browse all → | Rankings →

Data sourced from official public datasets. See our methodology for details. Retrieved and formatted by PlainBridges

P

Compiled by PlainBridges, Independent data publisher

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.