Forest Road over Upper Twin CR
GoodFlathead County, Montana · Cable Car Slide Area · Structure no. 011004000000092
- Built
- 1965
- 60 years old
- Condition
- Good
- inspected August 2024
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 110 ft
- 3 main spans
- Daily traffic
- 120
- 1990 count
- Owner
- Federal
- U.S. Forest Service
About this bridge
Forest Road over Upper Twin CR is a steel stringer/multi-beam or girder carrying Forest Road over Upper Twin CR in Flathead County, Montana. It was built in 1965, so it is 60 years old, older than the Montana average of 47 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 120 vehicles a day, roughly 4% of them trucks, projected to reach 180 by 2045. The structure is 110 ft (33.5 m) long and 30 ft wide. If it were closed, the detour would be 98.2 mi (158 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 | 7 Good | Some minor problems. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Forest Road over Upper Twin CR built?
It was built in 1965, making it 60 years old in 2025.
What condition is Forest Road over Upper Twin CR 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 2024.
How much traffic does Forest Road over Upper Twin CR carry?
About 120 vehicles per day (1990 count), of which roughly 4% are trucks.
How long is Forest Road over Upper Twin CR?
The structure is 110 ft (33.5 m) long with a longest span of 68 ft (20.7 m) and a deck 30 ft wide.
Who owns Forest Road over Upper Twin CR?
It is owned by the U.S. Forest Service.