US 12 over Drainage
GoodMusselshell County, Montana · 1M N Musselshell · Structure no. P00014191+09321
- Built
- 2003
- 22 years old
- Condition
- Good
- inspected December 2023
- Type
- Culvert
- Steel
- Length
- 24 ft
- 2 main spans
- Daily traffic
- 480
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
US 12 over Drainage is a steel culvert carrying US 12 over Drainage in Musselshell County, Montana. It was built in 2003, so it is 22 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 480 vehicles a day, roughly 16% of them trucks, projected to reach 504 by 2043. The structure is 24 ft (7.3 m) long. 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 |
|---|---|---|
| Channel and channel protection | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Culvert | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was US 12 over Drainage built?
It was built in 2003, making it 22 years old in 2025.
What condition is US 12 over Drainage 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 2023.
How much traffic does US 12 over Drainage carry?
About 480 vehicles per day (2023 count), of which roughly 16% are trucks.
How long is US 12 over Drainage?
The structure is 24 ft (7.3 m) long with a longest span of 11 ft (3.4 m).
Who owns US 12 over Drainage?
It is owned by the State Highway Agency.