Sourdough RD over Sweet Grass Creek 027
FairSweet Grass County, Montana · 13M NE Big Timber · Structure no. L49016006+02001
- Built
- 1997
- 28 years old
- Condition
- Fair
- inspected March 2024
- Type
- Tee Beam
- Prestressed Concrete
- Length
- 60 ft
- 1 main span
- Daily traffic
- 100
- 2025 count
- Owner
- County
- County Highway Agency
About this bridge
Sourdough RD over Sweet Grass Creek 027 is a prestressed concrete tee beam carrying Sourdough RD over Sweet Grass Creek 027 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 100 vehicles a day, roughly 3% of them trucks, projected to reach 100 by 2040. The structure is 60 ft (18.3 m) long and 20 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Sourdough RD over Sweet Grass Creek 027 built?
It was built in 1997, making it 28 years old in 2025.
What condition is Sourdough RD over Sweet Grass Creek 027 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 March 2024.
How much traffic does Sourdough RD over Sweet Grass Creek 027 carry?
About 100 vehicles per day (2025 count), of which roughly 3% are trucks.
How long is Sourdough RD over Sweet Grass Creek 027?
The structure is 60 ft (18.3 m) long with a longest span of 59 ft (18 m) and a deck 20 ft wide.
Who owns Sourdough RD over Sweet Grass Creek 027?
It is owned by the County Highway Agency.