IRR - S 39 over East Fork Armells Creek
FairRosebud County, Montana · 16M NW Colstrip · Structure no. P00039038+03951
- Built
- 1983
- 42 years old
- Condition
- Fair
- inspected February 2025
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 110 ft
- 3 main spans
- Daily traffic
- 787
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
IRR - S 39 over East Fork Armells Creek is a prestressed concrete stringer/multi-beam or girder carrying IRR - S 39 over East Fork Armells Creek in Rosebud County, Montana. It was built in 1983, so it is 42 years old, younger 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 787 vehicles a day, roughly 8% of them trucks, projected to reach 826 by 2043. The structure is 110 ft (33.6 m) long and 42 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 | 7 Good | Some minor problems. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was IRR - S 39 over East Fork Armells Creek built?
It was built in 1983, making it 42 years old in 2025.
What condition is IRR - S 39 over East Fork Armells 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 February 2025.
How much traffic does IRR - S 39 over East Fork Armells Creek carry?
About 787 vehicles per day (2023 count), of which roughly 8% are trucks.
How long is IRR - S 39 over East Fork Armells Creek?
The structure is 110 ft (33.6 m) long with a longest span of 47 ft (14.3 m) and a deck 42 ft wide.
Who owns IRR - S 39 over East Fork Armells Creek?
It is owned by the State Highway Agency.