Coal Mine RD over Ft. Belknap Canal 01
FairBlaine County, Montana · 5M NW Chinook · Structure no. L03051002+00001
- Built
- 1933
- 92 years old, rebuilt 2004
- Condition
- Fair
- inspected February 2023
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 43 ft
- 3 main spans
- Daily traffic
- 41
- 2023 count
- Owner
- County
- County Highway Agency
About this bridge
Coal Mine RD over Ft. Belknap Canal 01 is a steel stringer/multi-beam or girder carrying Coal Mine RD over Ft. Belknap Canal 01 in Blaine County, Montana. It was built in 1933 and reconstructed in 2004, 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 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 41 vehicles a day, roughly 3% of them trucks, projected to reach 43 by 2043. The structure is 43 ft (13 m) long and 16 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 | 7 Good | Some minor problems. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| 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 Coal Mine RD over Ft. Belknap Canal 01 built?
It was built in 1933, making it 92 years old in 2025. It was reconstructed in 2004.
What condition is Coal Mine RD over Ft. Belknap Canal 01 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 Ft. Belknap Canal 01 carry?
About 41 vehicles per day (2023 count), of which roughly 3% are trucks.
How long is Coal Mine RD over Ft. Belknap Canal 01?
The structure is 43 ft (13 m) long with a longest span of 15 ft (4.6 m) and a deck 16 ft wide.
Who owns Coal Mine RD over Ft. Belknap Canal 01?
It is owned by the County Highway Agency.