S 7 over Ash Creek
FairWibaux County, Montana · 25M S Wibaux · Structure no. P00027054+09931
- Built
- 1942
- 83 years old
- Condition
- Fair
- inspected August 2023
- Type
- Stringer/Multi-beam or Girder
- Wood or Timber
- Length
- 76 ft
- 3 main spans
- Daily traffic
- 581
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
S 7 over Ash Creek is a wood or timber stringer/multi-beam or girder carrying S 7 over Ash Creek in Wibaux County, Montana. It was built in 1942, so it is 83 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 581 vehicles a day, roughly 19% of them trucks, projected to reach 610 by 2043. The structure is 76 ft (23.2 m) long and 26 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 | 7 Good | Some minor problems. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| 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 7 over Ash Creek built?
It was built in 1942, making it 83 years old in 2025.
What condition is S 7 over Ash 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 August 2023.
How much traffic does S 7 over Ash Creek carry?
About 581 vehicles per day (2023 count), of which roughly 19% are trucks.
How long is S 7 over Ash Creek?
The structure is 76 ft (23.2 m) long with a longest span of 25 ft (7.6 m) and a deck 26 ft wide.
Who owns S 7 over Ash Creek?
It is owned by the State Highway Agency.