Petroleum RD over Big Porcupine CR
GoodRosebud County, Montana · 14M E Ingomar · Structure no. 000000202204275
- Built
- 2022
- 3 years old
- Condition
- Good
- inspected September 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 53 ft
- 1 main span
- Daily traffic
- 100
- 2025 count
- Owner
- County
- County Highway Agency
About this bridge
Petroleum RD over Big Porcupine CR is a prestressed concrete stringer/multi-beam or girder carrying Petroleum RD over Big Porcupine CR in Rosebud County, Montana. It was built in 2022, so it is 3 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 53 ft (16.3 m) long and 31 ft wide. If it were closed, the detour would be 14.9 mi (24 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 | 8 Very Good | No problems noted. |
| Superstructure | 8 Very Good | No problems noted. |
| 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 Petroleum RD over Big Porcupine CR built?
It was built in 2022, making it 3 years old in 2025.
What condition is Petroleum RD over Big Porcupine CR 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 September 2024.
How much traffic does Petroleum RD over Big Porcupine CR carry?
About 100 vehicles per day (2025 count), of which roughly 3% are trucks.
How long is Petroleum RD over Big Porcupine CR?
The structure is 53 ft (16.3 m) long with a longest span of 50 ft (15.2 m) and a deck 31 ft wide.
Who owns Petroleum RD over Big Porcupine CR?
It is owned by the County Highway Agency.