RD 231 over Libby CR
GoodLincoln County, Montana · Bolyards · Structure no. 011405000000214
- Built
- 1998
- 27 years old
- Condition
- Good
- inspected July 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 90 ft
- 1 main span
- Daily traffic
- 50
- Owner
- Federal
- U.S. Forest Service
About this bridge
RD 231 over Libby CR is a prestressed concrete stringer/multi-beam or girder carrying RD 231 over Libby CR in Lincoln County, Montana. It was built in 1998, so it is 27 years old, younger 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 50 vehicles a day, projected to reach 75 by 2045. The structure is 90 ft (27.4 m) long and 16 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 | 8 Very Good | No problems noted. |
| Superstructure | 8 Very Good | No problems noted. |
| Substructure | 8 Very Good | No problems noted. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was RD 231 over Libby CR built?
It was built in 1998, making it 27 years old in 2025.
What condition is RD 231 over Libby 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 July 2024.
How much traffic does RD 231 over Libby CR carry?
About 50 vehicles per day (latest count).
How long is RD 231 over Libby CR?
The structure is 90 ft (27.4 m) long with a longest span of 88 ft (26.7 m) and a deck 16 ft wide.
Who owns RD 231 over Libby CR?
It is owned by the U.S. Forest Service.