Mt 141 over Threemile Creek
GoodPowell County, Montana · 2 M N Avon · Structure no. 000000202208060
- Built
- 1961
- 64 years old
- Condition
- Good
- inspected December 2024
- Type
- Culvert
- Steel
- Length
- 27 ft
- 3 main spans
- Daily traffic
- 1,594
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
Mt 141 over Threemile Creek is a steel culvert carrying Mt 141 over Threemile Creek in Powell County, Montana. It was built in 1961, so it is 64 years old, older 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 1,594 vehicles a day, roughly 8% of them trucks, projected to reach 1,873 by 2043. The structure is 27 ft (8.2 m) long and 28 ft wide. If it were closed, the detour would be 55.3 mi (89 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 |
|---|---|---|
| Channel and channel protection | 7 Good | Some minor problems. |
| Culvert | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Mt 141 over Threemile Creek built?
It was built in 1961, making it 64 years old in 2025.
What condition is Mt 141 over Threemile 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 December 2024.
How much traffic does Mt 141 over Threemile Creek carry?
About 1,594 vehicles per day (2023 count), of which roughly 8% are trucks.
How long is Mt 141 over Threemile Creek?
The structure is 27 ft (8.2 m) long with a longest span of 7 ft (2.1 m) and a deck 28 ft wide.
Who owns Mt 141 over Threemile Creek?
It is owned by the State Highway Agency.