S 447 over Rosebud Creek Overflow
FairRosebud County, Montana · 7M SW Rosebud · Structure no. S00447005+01041
- Built
- 1971
- 54 years old
- Condition
- Fair
- inspected July 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 138 ft
- 3 main spans
- Daily traffic
- 61
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
S 447 over Rosebud Creek Overflow is a prestressed concrete stringer/multi-beam or girder carrying S 447 over Rosebud Creek Overflow in Rosebud County, Montana. It was built in 1971, so it is 54 years old, older 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 61 vehicles a day, roughly 7% of them trucks, projected to reach 64 by 2043. The structure is 138 ft (42.2 m) long and 34 ft wide. If it were closed, the detour would be 14.9 mi (24 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 |
|---|---|---|
| Deck | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| 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 S 447 over Rosebud Creek Overflow built?
It was built in 1971, making it 54 years old in 2025.
What condition is S 447 over Rosebud Creek Overflow 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 July 2024.
How much traffic does S 447 over Rosebud Creek Overflow carry?
About 61 vehicles per day (2023 count), of which roughly 7% are trucks.
How long is S 447 over Rosebud Creek Overflow?
The structure is 138 ft (42.2 m) long with a longest span of 47 ft (14.3 m) and a deck 34 ft wide.
Who owns S 447 over Rosebud Creek Overflow?
It is owned by the State Highway Agency.