Coal Mine RD over Red Rock Coulee 012
FairPosted for loadBlaine County, Montana · 5M NW Chinook · Structure no. L03051001+05001
- Built
- 1933
- 92 years old
- Condition
- Fair
- inspected February 2023
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 46 ft
- 2 main spans
- Daily traffic
- 41
- 2023 count
- Owner
- County
- County Highway Agency
About this bridge
Coal Mine RD over Red Rock Coulee 012 is a steel stringer/multi-beam or girder carrying Coal Mine RD over Red Rock Coulee 012 in Blaine County, Montana. It was built in 1933, so it is 92 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. Its operating status is: posted for load restriction.
It carries about 41 vehicles a day, roughly 3% of them trucks, projected to reach 43 by 2043. The structure is 46 ft (13.9 m) long and 19 ft wide. If it were closed, the detour would be 123.7 mi (199 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 | 8 Very Good | No problems noted. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Coal Mine RD over Red Rock Coulee 012 built?
It was built in 1933, making it 92 years old in 2025.
What condition is Coal Mine RD over Red Rock Coulee 012 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 February 2023.
How much traffic does Coal Mine RD over Red Rock Coulee 012 carry?
About 41 vehicles per day (2023 count), of which roughly 3% are trucks.
How long is Coal Mine RD over Red Rock Coulee 012?
The structure is 46 ft (13.9 m) long with a longest span of 22 ft (6.6 m) and a deck 19 ft wide.
Who owns Coal Mine RD over Red Rock Coulee 012?
It is owned by the County Highway Agency.