Mission Creek Road over Big Mission Creek
FairMason County, Washington · 0.79 N JCT SR 300 · Structure no. 084862000000000
- Built
- 1968
- 57 years old
- Condition
- Fair
- inspected August 2024
- Type
- Tee Beam
- Concrete
- Length
- 31 ft
- 1 main span
- Daily traffic
- 671
- 2024 count
- Owner
- County
- County Highway Agency
About this bridge
Mission Creek Road over Big Mission Creek is a concrete tee beam carrying Mission Creek Road over Big Mission Creek in Mason County, Washington. It was built in 1968, so it is 57 years old, older than the Washington average of 49.8 years.
The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
It carries about 671 vehicles a day, roughly 5% of them trucks, projected to reach 1,200 by 2044. The structure is 31 ft (9.6 m) long and 31 ft wide. If it were closed, the detour would be 98.8 mi (159 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Mission Creek Road over Big Mission Creek built?
It was built in 1968, making it 57 years old in 2025.
What condition is Mission Creek Road over Big Mission Creek in?
The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in August 2024.
How much traffic does Mission Creek Road over Big Mission Creek carry?
About 671 vehicles per day (2024 count), of which roughly 5% are trucks.
How long is Mission Creek Road over Big Mission Creek?
The structure is 31 ft (9.6 m) long with a longest span of 29 ft (8.8 m) and a deck 31 ft wide.
Who owns Mission Creek Road over Big Mission Creek?
It is owned by the County Highway Agency.