Fs Route No. 311 over Granite Creek
FairBonner County, Idaho · Forks of Granite · Structure no. 010408000000182
- Built
- 1952
- 73 years old
- Condition
- Fair
- inspected July 2024
- Type
- Stringer/Multi-beam or Girder
- Wood or Timber
- Length
- 32 ft
- 1 main span
- Daily traffic
- 40
- 2018 count
- Owner
- Federal
- U.S. Forest Service
About this bridge
Fs Route No. 311 over Granite Creek is a wood or timber stringer/multi-beam or girder carrying Fs Route No. 311 over Granite Creek in Bonner County, Idaho. It was built in 1952, so it is 73 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 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 40 vehicles a day, projected to reach 60 by 2045. The structure is 32 ft (9.9 m) long and 15 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| 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 No. 311 over Granite Creek built?
It was built in 1952, making it 73 years old in 2025.
What condition is Fs Route No. 311 over Granite 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 July 2024.
How much traffic does Fs Route No. 311 over Granite Creek carry?
About 40 vehicles per day (2018 count).
How long is Fs Route No. 311 over Granite Creek?
The structure is 32 ft (9.9 m) long with a longest span of 31 ft (9.4 m) and a deck 15 ft wide.
Who owns Fs Route No. 311 over Granite Creek?
It is owned by the U.S. Forest Service.