Hammer Cutoff RD over Libby Creek
FairLincoln County, Montana · 9M S Libby · Structure no. S00482006+08931
- Built
- 1972
- 53 years old
- Condition
- Fair
- inspected October 2024
- Type
- Tee Beam
- Prestressed Concrete
- Length
- 102 ft
- 1 main span
- Daily traffic
- 324
- 2023 count
- Owner
- County
- County Highway Agency
About this bridge
Hammer Cutoff RD over Libby Creek is a prestressed concrete tee beam carrying Hammer Cutoff RD over Libby Creek in Lincoln County, Montana. It was built in 1972, so it is 53 years old, older than the Montana average of 47 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 324 vehicles a day, roughly 4% of them trucks, projected to reach 340 by 2043. The structure is 102 ft (31.1 m) long and 24 ft wide. If it were closed, the detour would be 19.9 mi (32 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 | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Hammer Cutoff RD over Libby Creek built?
It was built in 1972, making it 53 years old in 2025.
What condition is Hammer Cutoff RD over Libby 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 October 2024.
How much traffic does Hammer Cutoff RD over Libby Creek carry?
About 324 vehicles per day (2023 count), of which roughly 4% are trucks.
How long is Hammer Cutoff RD over Libby Creek?
The structure is 102 ft (31.1 m) long with a longest span of 100 ft (30.5 m) and a deck 24 ft wide.
Who owns Hammer Cutoff RD over Libby Creek?
It is owned by the County Highway Agency and maintained by the State Highway Agency.