Fs Route 301 over ST Maries River
FairShoshone County, Idaho · 1 Mile from Clarkia Id · Structure no. 010404000000196
- Built
- 1973
- 52 years old, rebuilt 1997
- Condition
- Fair
- inspected July 2024
- Type
- Tee Beam
- Prestressed Concrete
- Length
- 55 ft
- 1 main span
- Daily traffic
- 50
- Owner
- Federal
- U.S. Forest Service
About this bridge
Fs Route 301 over ST Maries River is a prestressed concrete tee beam carrying Fs Route 301 over ST Maries River in Shoshone County, Idaho. It was built in 1973 and reconstructed in 1997, so it is 52 years old, older than the Idaho average of 45.3 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 50 vehicles a day, projected to reach 75 by 2045. The structure is 55 ft (16.8 m) long and 24 ft wide. If it were closed, the detour would be 620.7 mi (999 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Fs Route 301 over ST Maries River built?
It was built in 1973, making it 52 years old in 2025. It was reconstructed in 1997.
What condition is Fs Route 301 over ST Maries River 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 July 2024.
How much traffic does Fs Route 301 over ST Maries River carry?
About 50 vehicles per day (latest count).
How long is Fs Route 301 over ST Maries River?
The structure is 55 ft (16.8 m) long with a longest span of 54 ft (16.5 m) and a deck 24 ft wide.
Who owns Fs Route 301 over ST Maries River?
It is owned by the U.S. Forest Service and maintained by the Private (other than railroad).