US 191 over Sweet Grass Creek
FairSweet Grass County, Montana · 2M S Melville · Structure no. P00045018+02631
- Built
- 1947
- 78 years old
- Condition
- Fair
- inspected June 2023
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 184 ft
- 3 main spans
- Daily traffic
- 661
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
US 191 over Sweet Grass Creek is a steel continuous stringer/multi-beam or girder carrying US 191 over Sweet Grass Creek in Sweet Grass County, Montana. It was built in 1947, so it is 78 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 661 vehicles a day, roughly 12% of them trucks, projected to reach 694 by 2043. The structure is 184 ft (56.1 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was US 191 over Sweet Grass Creek built?
It was built in 1947, making it 78 years old in 2025.
What condition is US 191 over Sweet Grass 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 Sweet Grass Creek carry?
About 661 vehicles per day (2023 count), of which roughly 12% are trucks.
How long is US 191 over Sweet Grass Creek?
The structure is 184 ft (56.1 m) long with a longest span of 71 ft (21.6 m) and a deck 26 ft wide.
Who owns US 191 over Sweet Grass Creek?
It is owned by the State Highway Agency.