US 12 over Horsethief Creek
GoodMusselshell County, Montana · 3M SW Roundup · Structure no. P00014165+07861
- Built
- 2015
- 10 years old
- Condition
- Good
- inspected October 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 91 ft
- 1 main span
- Daily traffic
- 440
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
US 12 over Horsethief Creek is a prestressed concrete stringer/multi-beam or girder carrying US 12 over Horsethief Creek in Musselshell County, Montana. It was built in 2015, so it is 10 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 440 vehicles a day, roughly 13% of them trucks, projected to reach 462 by 2043. The structure is 91 ft (27.8 m) long and 35 ft wide. If it were closed, the detour would be 123.7 mi (199 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 | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was US 12 over Horsethief Creek built?
It was built in 2015, making it 10 years old in 2025.
What condition is US 12 over Horsethief Creek 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 October 2024.
How much traffic does US 12 over Horsethief Creek carry?
About 440 vehicles per day (2023 count), of which roughly 13% are trucks.
How long is US 12 over Horsethief Creek?
The structure is 91 ft (27.8 m) long with a longest span of 87 ft (26.4 m) and a deck 35 ft wide.
Who owns US 12 over Horsethief Creek?
It is owned by the State Highway Agency.