Bolster RD over Big Muddy Creek 029
FairSheridan County, Montana · 6M SE Redstone · Structure no. L46405000+04001
- Built
- 1970
- 55 years old
- Condition
- Fair
- inspected January 2024
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete
- Length
- 60 ft
- 1 main span
- Daily traffic
- 30
- 2023 count
- Owner
- County
- County Highway Agency
About this bridge
Bolster RD over Big Muddy Creek 029 is a prestressed concrete box beam or girders - multiple carrying Bolster RD over Big Muddy Creek 029 in Sheridan County, Montana. It was built in 1970, so it is 55 years old, older 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 30 vehicles a day, roughly 3% of them trucks, projected to reach 32 by 2043. The structure is 60 ft (18.3 m) long and 24 ft wide. If it were closed, the detour would be 21.7 mi (35 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 | 7 Good | Some minor problems. |
| 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 Bolster RD over Big Muddy Creek 029 built?
It was built in 1970, making it 55 years old in 2025.
What condition is Bolster RD over Big Muddy Creek 029 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 January 2024.
How much traffic does Bolster RD over Big Muddy Creek 029 carry?
About 30 vehicles per day (2023 count), of which roughly 3% are trucks.
How long is Bolster RD over Big Muddy Creek 029?
The structure is 60 ft (18.3 m) long with a longest span of 59 ft (18 m) and a deck 24 ft wide.
Who owns Bolster RD over Big Muddy Creek 029?
It is owned by the County Highway Agency.