US 12 over Willow Creek
FairMusselshell County, Montana · 4M NE Roundup · Structure no. P00014174+06061
- Built
- 1999
- 26 years old
- Condition
- Fair
- inspected October 2024
- Type
- Culvert
- Concrete
- Length
- 22 ft
- 2 main spans
- Daily traffic
- 712
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
US 12 over Willow Creek is a concrete culvert carrying US 12 over Willow Creek in Musselshell County, Montana. It was built in 1999, so it is 26 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 712 vehicles a day, roughly 11% of them trucks, projected to reach 748 by 2043. The structure is 22 ft (6.6 m) long. If it were closed, the detour would be 123.7 mi (199 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 |
|---|---|---|
| Channel and channel protection | 7 Good | Some minor problems. |
| Culvert | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was US 12 over Willow Creek built?
It was built in 1999, making it 26 years old in 2025.
What condition is US 12 over Willow 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 Willow Creek carry?
About 712 vehicles per day (2023 count), of which roughly 11% are trucks.
How long is US 12 over Willow Creek?
The structure is 22 ft (6.6 m) long with a longest span of 10 ft (3 m).
Who owns US 12 over Willow Creek?
It is owned by the State Highway Agency.