Old HWY 10 E over Armells Creek 045
FairRosebud County, Montana · 5M W Forsyth · Structure no. L44311005+07001
- Built
- 1932
- 93 years old, rebuilt 1941
- Condition
- Fair
- inspected September 2024
- Type
- Tee Beam
- Concrete
- Length
- 129 ft
- 4 main spans
- Daily traffic
- 352
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
Old HWY 10 E over Armells Creek 045 is a concrete tee beam carrying Old HWY 10 E over Armells Creek 045 in Rosebud County, Montana. It was built in 1932 and reconstructed in 1941, so it is 93 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 5 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 352 vehicles a day, roughly 10% of them trucks, projected to reach 370 by 2043. The structure is 129 ft (39.3 m) long and 33 ft wide. If it were closed, the detour would be 11.8 mi (19 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 | 7 Good | Some minor problems. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Old HWY 10 E over Armells Creek 045 built?
It was built in 1932, making it 93 years old in 2025. It was reconstructed in 1941.
What condition is Old HWY 10 E over Armells Creek 045 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 September 2024.
How much traffic does Old HWY 10 E over Armells Creek 045 carry?
About 352 vehicles per day (2023 count), of which roughly 10% are trucks.
How long is Old HWY 10 E over Armells Creek 045?
The structure is 129 ft (39.3 m) long with a longest span of 33 ft (10 m) and a deck 33 ft wide.
Who owns Old HWY 10 E over Armells Creek 045?
It is owned by the State Highway Agency.