Lower Sweet Grass over Yellowstone River 038
FairSweet Grass County, Montana · SE Greycliff · Structure no. L49001000+08001
- Built
- 1991
- 34 years old
- Condition
- Fair
- inspected September 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 353 ft
- 3 main spans
- Daily traffic
- 100
- 2025 count
- Owner
- County
- County Highway Agency
About this bridge
Lower Sweet Grass over Yellowstone River 038 is a prestressed concrete stringer/multi-beam or girder carrying Lower Sweet Grass over Yellowstone River 038 in Sweet Grass County, Montana. It was built in 1991, so it is 34 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 100 vehicles a day, roughly 3% of them trucks, projected to reach 100 by 2040. The structure is 353 ft (107.6 m) long and 26 ft wide. If it were closed, the detour would be 29.8 mi (48 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Lower Sweet Grass over Yellowstone River 038 built?
It was built in 1991, making it 34 years old in 2025.
What condition is Lower Sweet Grass over Yellowstone River 038 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 Lower Sweet Grass over Yellowstone River 038 carry?
About 100 vehicles per day (2025 count), of which roughly 3% are trucks.
How long is Lower Sweet Grass over Yellowstone River 038?
The structure is 353 ft (107.6 m) long with a longest span of 118 ft (36 m) and a deck 26 ft wide.
Who owns Lower Sweet Grass over Yellowstone River 038?
It is owned by the County Highway Agency.