Big Porcupine RD over Big Porcupine CR 010
FairRosebud County, Montana · 5M NE Vananda · Structure no. L44126007+00001
- Built
- 1992
- 33 years old
- Condition
- Fair
- inspected September 2024
- Type
- Tee Beam
- Prestressed Concrete
- Length
- 88 ft
- 1 main span
- Daily traffic
- 100
- 2025 count
- Owner
- County
- County Highway Agency
About this bridge
Big Porcupine RD over Big Porcupine CR 010 is a prestressed concrete tee beam carrying Big Porcupine RD over Big Porcupine CR 010 in Rosebud County, Montana. It was built in 1992, so it is 33 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 5 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 88 ft (26.8 m) long and 29 ft wide. If it were closed, the detour would be 9.9 mi (16 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 | 8 Very Good | No problems noted. |
| Substructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Big Porcupine RD over Big Porcupine CR 010 built?
It was built in 1992, making it 33 years old in 2025.
What condition is Big Porcupine RD over Big Porcupine CR 010 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 Big Porcupine RD over Big Porcupine CR 010 carry?
About 100 vehicles per day (2025 count), of which roughly 3% are trucks.
How long is Big Porcupine RD over Big Porcupine CR 010?
The structure is 88 ft (26.8 m) long with a longest span of 88 ft (26.8 m) and a deck 29 ft wide.
Who owns Big Porcupine RD over Big Porcupine CR 010?
It is owned by the County Highway Agency.