RD 231 over Libby CR
GoodLincoln County, Montana · Libby CR · Structure no. 011405000000224
- Built
- 1984
- 41 years old
- Condition
- Good
- inspected August 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 92 ft
- 1 main span
- Daily traffic
- 99
- 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 1984, so it is 41 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 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 99 vehicles a day, projected to reach 148 by 2045. The structure is 92 ft (28 m) long and 19 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 | 9 Excellent | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was RD 231 over Libby CR built?
It was built in 1984, making it 41 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 August 2024.
How much traffic does RD 231 over Libby CR carry?
About 99 vehicles per day (latest count).
How long is RD 231 over Libby CR?
The structure is 92 ft (28 m) long with a longest span of 90 ft (27.4 m) and a deck 19 ft wide.
Who owns RD 231 over Libby CR?
It is owned by the U.S. Forest Service.