S 80 over Cowboy Steele Creek
FairPosted for loadChouteau County, Montana · 5M SE Square Butte · Structure no. P00080040+09331
- Built
- 1950
- 75 years old, rebuilt 1964
- Condition
- Fair
- inspected September 2024
- Type
- Stringer/Multi-beam or Girder
- Wood or Timber
- Length
- 77 ft
- 3 main spans
- Daily traffic
- 158
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
S 80 over Cowboy Steele Creek is a wood or timber stringer/multi-beam or girder carrying S 80 over Cowboy Steele Creek in Chouteau County, Montana. It was built in 1950 and reconstructed in 1964, so it is 75 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. Its operating status is: posted for load restriction.
It carries about 158 vehicles a day, roughly 17% of them trucks, projected to reach 166 by 2043. The structure is 77 ft (23.5 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| 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 S 80 over Cowboy Steele Creek built?
It was built in 1950, making it 75 years old in 2025. It was reconstructed in 1964.
What condition is S 80 over Cowboy Steele 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 September 2024.
How much traffic does S 80 over Cowboy Steele Creek carry?
About 158 vehicles per day (2023 count), of which roughly 17% are trucks.
How long is S 80 over Cowboy Steele Creek?
The structure is 77 ft (23.5 m) long with a longest span of 25 ft (7.6 m) and a deck 30 ft wide.
Who owns S 80 over Cowboy Steele Creek?
It is owned by the State Highway Agency.