S 78 FH 83 over East Rosebud Creek
FairCarbon County, Montana · Roscoe · Structure no. P00078019+08491
- Built
- 1959
- 66 years old
- Condition
- Fair
- inspected November 2023
- Type
- Tee Beam
- Concrete Continuous
- Length
- 112 ft
- 3 main spans
- Daily traffic
- 661
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
S 78 FH 83 over East Rosebud Creek is a concrete continuous tee beam carrying S 78 FH 83 over East Rosebud Creek in Carbon County, Montana. It was built in 1959, so it is 66 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 661 vehicles a day, roughly 3% of them trucks, projected to reach 694 by 2043. The structure is 112 ft (34.1 m) long and 30 ft wide. If it were closed, the detour would be 123.7 mi (199 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was S 78 FH 83 over East Rosebud Creek built?
It was built in 1959, making it 66 years old in 2025.
What condition is S 78 FH 83 over East Rosebud Creek 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 November 2023.
How much traffic does S 78 FH 83 over East Rosebud Creek carry?
About 661 vehicles per day (2023 count), of which roughly 3% are trucks.
How long is S 78 FH 83 over East Rosebud Creek?
The structure is 112 ft (34.1 m) long with a longest span of 70 ft (21.3 m) and a deck 30 ft wide.
Who owns S 78 FH 83 over East Rosebud Creek?
It is owned by the State Highway Agency.