Mason County, WA
139 public highway bridges
Mason County Bridge Snapshot
Mason County, Washington contains 139 public highway bridges in the FHWA National Bridge Inventory. Roughly 49.6% are rated “Good,” 38.8% “Fair,” 3.6% “Poor,” and 3.6% 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.
Condition Distribution
All Bridges (139)
NP RR
UnknownOver: STATE ROUTE 3
3.3 N JCT US 101, Mason, WA
NP RY
UnknownOver: STATE ROUTE 3
2.7 N JCT SR 302, Mason, WA
NP RY
UnknownOver: STATE ROUTE 3
1.1 N JCT SR 300, Mason, WA
PEDESTRIAN
UnknownOver: STATE ROUTE 106
6.6 E JCT US 101, Mason, WA
W CLOQUALLUM RD
UnknownOver: US 101
4.5 S JCT SR 102, Mason, WA
US 101
UnknownOver: SR 3
JCT US 101, Mason, WA
C ST
UnknownOver: US 101
2.8 S JCT SR 102, Mason, WA
US 101
UnknownOver: MATLOCK RD
3.4 S JCT SR 102, Mason, WA
US 101
UnknownOver: SR 108
7.8 E GRAYS HBR CO, Mason, WA
W. KNEELAND BLVD
UnknownOver: US 101
1.7 S JCT SR 102, Mason, WA
GRAVEL CHUTE
UnknownOver: SR 3
4.0 N JCT US 101, Mason, WA
23610
FairOver: CEDAR CREEK
NO DATA ENTERED, Mason, WA
Arcadia Road
FairOver: BUR. NOR. RAILROAD
1.45 E JCT SR 3, Mason, WA
PARK ENTRANCE
FairOver: TWANOH CREEK
TWANOH STATE PARK, Mason, WA
SR 3
FairOver: MILL CREEK
0.9 N JCT US 101, Mason, WA
US 101
FairOver: HAMMA HAMMA RIVER
5.1 S JEFFERSON CO, Mason, WA
Arcadia Rd.
FairOver: MILL CREEK
4.72 E JCT SR 3, Mason, WA
North Shore Rd
FairOver: TAHUYA ESTUARY
0.14 S Belfair Tahuya rd, Mason, WA
Eich Road
FairOver: SKOOKUM CREEK
0.26 N JCT SR 108, Mason, WA
Bourgault Rd
FairOver: WEAVER CREEK
0.03 W JCT SR101, Mason, WA
Dewatto Holly rd
FairOver: DEWATTO RIVER
2.49 NE JCT Dewatto rd, Mason, WA
North Shore Rd
FairOver: RENDSLAND CREEK
4.48 W of Belfair Tahuya, Mason, WA
SR 3
FairOver: GOLDSBOROUGH CREEK
2.4 N JCT US 101, Mason, WA
SR 3
FairOver: SHERWOOD CREEK
20.5 N JCT US 101, Mason, WA
Deckerville Road
FairOver: DECKER CREEK
2.84 W JCT Matlock, Mason, WA
Beeville Loop Rd
FairOver: DRY BED CREEK
0.58 W JCT Beeville Rd, Mason, WA
Steelhead Drive So
FairOver: MISSION CREEK
0.04 W Mission Cr Rd, Mason, WA
NO DATA ENTERED
FairOver: CANYON RIVER
NO DATA ENTERED, Mason, WA
US 101
FairOver: LILLIWAUP R
12.6 S JEFFERSON CO, Mason, WA
SR 3
FairOver: CRANBERRY CREEK
8.6 N JCT US 101, Mason, WA
US 101
FairOver: WAKETICKEH CREEK
3.9 S JEFFERSON CO, Mason, WA
NO DATA ENTERED
FairOver: HAMMA HAMMA RIVER
NO DATA ENTERED, Mason, WA
US 101
FairOver: SKOKOMISH RIVER
1.8 S JCT SR 106, Mason, WA
SR 108
FairOver: SKOOKUM CREEK
2.5 E GRAYS HBR CO, Mason, WA
Agate Loop Rd
FairOver: CAMPBELL CREEK
0.48 N JCT CRESTVIEW DR, Mason, WA
US 101
FairOver: SUND CREEK
14.3 S JEFFERSON CO, Mason, WA
SR 302
FairOver: COULTER CR
1.3 E JCT SR 3, Mason, WA
SR 101
FairOver: CUSHMAN TAILRACE
19.9 S JEFFERSON CO, Mason, WA
SR 108
FairOver: SKOOKUM CREEK
6.9 E GRAYS HBR CO, Mason, WA
CO. RD. 90100
FairOver: DECKER CREEK
6.4 MI SO MATLOCK, Mason, WA
NO DATA ENTERED
FairOver: MID FORK SATSOP RIVER
NO DATA ENTERED, Mason, WA
NO DATA ENTERED
FairOver: WASHINGTON CREEK
NO DATA ENTERED, Mason, WA
SR 300
FairOver: UNION RIVER
2.9 E STATE PARK, Mason, WA
SR 300
FairOver: MISSION CREEK
0.3 E STATE PARK, Mason, WA
Mission Creek Road
FairOver: BIG MISSION CREEK
0.79 N JCT SR 300, Mason, WA
NO DATA ENTERED
FairOver: N FK SKOKOMISH RIVER
NO DATA ENTERED, Mason, WA
Mary M Knight Rd
FairOver: DRY CREEK
0.15 W of MatlockBradyRD, Mason, WA
NO DATA ENTERED
FairOver: S FK SKOKOMISH RIVER
NO DATA ENTERED, Mason, WA
NO DATA ENTERED
FairOver: BOULDER CREEK
NO DATA ENTERED, Mason, WA
SR 3
FairOver: JOHNS CREEK
6.6 N JCT US 101, Mason, WA
Read our methodology — how this data is sourced, computed, and verified.
Related
| Publisher | Kiznis Studio |
| Sources | FHWA National Bridge Inventory, public U.S. government datasets |