Roundhouse RD over Big Spring Creek 135
GoodFergus County, Montana · 2M S Lewistown · Structure no. 000000000002828
- Built
- 2016
- 9 years old
- Condition
- Good
- inspected August 2023
- Type
- Tee Beam
- Prestressed Concrete
- Length
- 54 ft
- 1 main span
- Daily traffic
- 100
- 2025 count
- Owner
- County
- County Highway Agency
About this bridge
Roundhouse RD over Big Spring Creek 135 is a prestressed concrete tee beam carrying Roundhouse RD over Big Spring Creek 135 in Fergus County, Montana. It was built in 2016, so it is 9 years old, younger than the Montana average of 47 years.
The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 100 vehicles a day, roughly 3% of them trucks, projected to reach 100 by 2040. The structure is 54 ft (16.5 m) long and 32 ft wide. If it were closed, the detour would be 8.1 mi (13 km).
Location
Open in Google MapsCondition and inspection
All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| 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 Roundhouse RD over Big Spring Creek 135 built?
It was built in 2016, making it 9 years old in 2025.
What condition is Roundhouse RD over Big Spring Creek 135 in?
The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in August 2023.
How much traffic does Roundhouse RD over Big Spring Creek 135 carry?
About 100 vehicles per day (2025 count), of which roughly 3% are trucks.
How long is Roundhouse RD over Big Spring Creek 135?
The structure is 54 ft (16.5 m) long with a longest span of 52 ft (15.8 m) and a deck 32 ft wide.
Who owns Roundhouse RD over Big Spring Creek 135?
It is owned by the County Highway Agency.