Forest Road 277 over South Fork of the Snake
GoodBonneville County, Idaho · Palisades Dam · Structure no. 14PALRIVR
- Built
- 2012
- 13 years old
- Condition
- Good
- inspected August 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 310 ft
- 3 main spans
- Daily traffic
- 100
- 2023 count
- Owner
- Federal
- Bureau of Reclamation
About this bridge
Forest Road 277 over South Fork of the Snake is a prestressed concrete stringer/multi-beam or girder carrying Forest Road 277 over South Fork of the Snake in Bonneville County, Idaho. It was built in 2012, so it is 13 years old, younger than the Idaho average of 45.3 years.
The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 100 vehicles a day, roughly 10% of them trucks, projected to reach 100 by 2043. The structure is 310 ft (94.5 m) long and 31 ft wide. If it were closed, the detour would be 24.9 mi (40 km).
Location
Open in Google MapsCondition and inspection
All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 8 Very Good | No problems noted. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Forest Road 277 over South Fork of the Snake built?
It was built in 2012, making it 13 years old in 2025.
What condition is Forest Road 277 over South Fork of the Snake in?
The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in August 2023.
How much traffic does Forest Road 277 over South Fork of the Snake carry?
About 100 vehicles per day (2023 count), of which roughly 10% are trucks.
How long is Forest Road 277 over South Fork of the Snake?
The structure is 310 ft (94.5 m) long with a longest span of 116 ft (35.5 m) and a deck 31 ft wide.
Who owns Forest Road 277 over South Fork of the Snake?
It is owned by the Bureau of Reclamation.