IRR - S 39 over Rosebud Creek
GoodRosebud County, Montana · 9M SE Colstrip · Structure no. P00039013+04521
- Built
- 2004
- 21 years old
- Condition
- Good
- inspected July 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 146 ft
- 1 main span
- Daily traffic
- 671
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
IRR - S 39 over Rosebud Creek is a prestressed concrete stringer/multi-beam or girder carrying IRR - S 39 over Rosebud Creek in Rosebud County, Montana. It was built in 2004, so it is 21 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 671 vehicles a day, roughly 5% of them trucks, projected to reach 705 by 2043. The structure is 146 ft (44.5 m) long and 38 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 | 8 Very Good | No problems noted. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was IRR - S 39 over Rosebud Creek built?
It was built in 2004, making it 21 years old in 2025.
What condition is IRR - S 39 over Rosebud 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 July 2024.
How much traffic does IRR - S 39 over Rosebud Creek carry?
About 671 vehicles per day (2023 count), of which roughly 5% are trucks.
How long is IRR - S 39 over Rosebud Creek?
The structure is 146 ft (44.5 m) long with a longest span of 142 ft (43.2 m) and a deck 38 ft wide.
Who owns IRR - S 39 over Rosebud Creek?
It is owned by the State Highway Agency.