Fs Route 509 over ST Joe River
FairShoshone County, Idaho · 20 MI from Avery Id · Structure no. 010402000000124
- Built
- 1954
- 71 years old
- Condition
- Fair
- inspected July 2022
- Type
- Tee Beam
- Prestressed Concrete
- Length
- 125 ft
- 1 main span
- Daily traffic
- 50
- Owner
- Federal
- U.S. Forest Service
About this bridge
Fs Route 509 over ST Joe River is a prestressed concrete tee beam carrying Fs Route 509 over ST Joe River in Shoshone County, Idaho. It was built in 1954, so it is 71 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 125 ft (38.1 m) long and 16 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Substructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Channel and channel protection | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Fs Route 509 over ST Joe River built?
It was built in 1954, making it 71 years old in 2025.
What condition is Fs Route 509 over ST Joe 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 2022.
How much traffic does Fs Route 509 over ST Joe River carry?
About 50 vehicles per day (latest count).
How long is Fs Route 509 over ST Joe River?
The structure is 125 ft (38.1 m) long with a longest span of 75 ft (22.9 m) and a deck 16 ft wide.
Who owns Fs Route 509 over ST Joe River?
It is owned by the U.S. Forest Service.