US 12 over Timber Creek
FairFallon County, Montana · 5M W Baker · Structure no. P00002077+04151
- Built
- 1998
- 27 years old
- Condition
- Fair
- inspected October 2024
- Type
- Slab
- Concrete Continuous
- Length
- 79 ft
- 3 main spans
- Daily traffic
- 825
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
US 12 over Timber Creek is a concrete continuous slab carrying US 12 over Timber Creek in Fallon 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 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 825 vehicles a day, roughly 8% of them trucks, projected to reach 866 by 2043. The structure is 79 ft (24.1 m) long and 38 ft wide. If it were closed, the detour would be 65.9 mi (106 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was US 12 over Timber Creek built?
It was built in 1998, making it 27 years old in 2025.
What condition is US 12 over Timber 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 US 12 over Timber Creek carry?
About 825 vehicles per day (2023 count), of which roughly 8% are trucks.
How long is US 12 over Timber Creek?
The structure is 79 ft (24.1 m) long with a longest span of 30 ft (9.1 m) and a deck 38 ft wide.
Who owns US 12 over Timber Creek?
It is owned by the State Highway Agency.