Big Lake CR over Big Hole River 090
FairPosted for loadBeaverhead County, Montana · 8M NW Jackson · Structure no. L01083001+06001
- Built
- 1977
- 48 years old, rebuilt 2005
- Condition
- Fair
- inspected July 2023
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 51 ft
- 2 main spans
- Daily traffic
- 100
- 2025 count
- Owner
- County
- County Highway Agency
About this bridge
Big Lake CR over Big Hole River 090 is a steel stringer/multi-beam or girder carrying Big Lake CR over Big Hole River 090 in Beaverhead County, Montana. It was built in 1977 and reconstructed in 2005, so it is 48 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. Its operating status is: posted for load restriction.
It carries about 100 vehicles a day, roughly 3% of them trucks, projected to reach 100 by 2040. The structure is 51 ft (15.5 m) long and 18 ft wide. If it were closed, the detour would be 6.8 mi (11 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Big Lake CR over Big Hole River 090 built?
It was built in 1977, making it 48 years old in 2025. It was reconstructed in 2005.
What condition is Big Lake CR over Big Hole River 090 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 July 2023.
How much traffic does Big Lake CR over Big Hole River 090 carry?
About 100 vehicles per day (2025 count), of which roughly 3% are trucks.
How long is Big Lake CR over Big Hole River 090?
The structure is 51 ft (15.5 m) long with a longest span of 25 ft (7.6 m) and a deck 18 ft wide.
Who owns Big Lake CR over Big Hole River 090?
It is owned by the County Highway Agency.