8th LN over Mill Coulee Canal 049
FairCascade County, Montana · 8M E Fairfield · Structure no. L07022000+09001
- Built
- 1950
- 75 years old, rebuilt 1999
- Condition
- Fair
- inspected December 2023
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 35 ft
- 2 main spans
- Daily traffic
- 100
- 2025 count
- Owner
- County
- County Highway Agency
About this bridge
8th LN over Mill Coulee Canal 049 is a steel continuous stringer/multi-beam or girder carrying 8th LN over Mill Coulee Canal 049 in Cascade County, Montana. It was built in 1950 and reconstructed in 1999, so it is 75 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 100 vehicles a day, roughly 3% of them trucks, projected to reach 100 by 2040. The structure is 35 ft (10.7 m) long and 19 ft wide. If it were closed, the detour would be 3.7 mi (6 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 8th LN over Mill Coulee Canal 049 built?
It was built in 1950, making it 75 years old in 2025. It was reconstructed in 1999.
What condition is 8th LN over Mill Coulee Canal 049 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 December 2023.
How much traffic does 8th LN over Mill Coulee Canal 049 carry?
About 100 vehicles per day (2025 count), of which roughly 3% are trucks.
How long is 8th LN over Mill Coulee Canal 049?
The structure is 35 ft (10.7 m) long with a longest span of 17 ft (5.1 m) and a deck 19 ft wide.
Who owns 8th LN over Mill Coulee Canal 049?
It is owned by the County Highway Agency.