US 191 over Big Timber Creek
FairSweet Grass County, Montana · 2M N Big Timber · Structure no. P00045001+07641
- Built
- 1997
- 28 years old
- Condition
- Fair
- inspected June 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 162 ft
- 2 main spans
- Daily traffic
- 1,341
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
US 191 over Big Timber Creek is a prestressed concrete stringer/multi-beam or girder carrying US 191 over Big Timber Creek in Sweet Grass County, Montana. It was built in 1997, so it is 28 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 1,341 vehicles a day, roughly 6% of them trucks, projected to reach 1,408 by 2043. The structure is 162 ft (49.5 m) long and 38 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 | 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 US 191 over Big Timber Creek built?
It was built in 1997, making it 28 years old in 2025.
What condition is US 191 over Big Timber 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 June 2023.
How much traffic does US 191 over Big Timber Creek carry?
About 1,341 vehicles per day (2023 count), of which roughly 6% are trucks.
How long is US 191 over Big Timber Creek?
The structure is 162 ft (49.5 m) long with a longest span of 81 ft (24.7 m) and a deck 38 ft wide.
Who owns US 191 over Big Timber Creek?
It is owned by the State Highway Agency.