Stevens Canyon Roa over Muddy Fork
FairLewis County, Washington · 10.3 Miles West of Jct. U · Structure no. 9450011P0000000
- Built
- 1952
- 73 years old
- Condition
- Fair
- inspected August 2024
- Type
- Arch - Deck
- Concrete
- Length
- 79 ft
- 1 main span
- Daily traffic
- 1,375
- 2022 count
- Owner
- Federal
- National Park Service
About this bridge
Stevens Canyon Roa over Muddy Fork is a concrete arch - deck carrying Stevens Canyon Roa over Muddy Fork in Lewis County, Washington. It was built in 1952, so it is 73 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 6 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 1,375 vehicles a day, roughly 15% of them trucks, projected to reach 1,650 by 2042. The structure is 79 ft (24.1 m) long and 40 ft wide. If it were closed, the detour would be 123.7 mi (199 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 |
|---|---|---|
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Stevens Canyon Roa over Muddy Fork built?
It was built in 1952, making it 73 years old in 2025.
What condition is Stevens Canyon Roa over Muddy Fork 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 Stevens Canyon Roa over Muddy Fork carry?
About 1,375 vehicles per day (2022 count), of which roughly 15% are trucks.
How long is Stevens Canyon Roa over Muddy Fork?
The structure is 79 ft (24.1 m) long with a longest span of 79 ft (24.1 m) and a deck 40 ft wide.
Who owns Stevens Canyon Roa over Muddy Fork?
It is owned by the National Park Service.