Twin Lakes RD over Big Hole River 080
FairBeaverhead County, Montana · 6M S Wisdom · Structure no. L01012001+05001
- Built
- 1999
- 26 years old
- Condition
- Fair
- inspected October 2024
- Type
- Tee Beam
- Prestressed Concrete
- Length
- 86 ft
- 1 main span
- Daily traffic
- 100
- 2025 count
- Owner
- County
- County Highway Agency
About this bridge
Twin Lakes RD over Big Hole River 080 is a prestressed concrete tee beam carrying Twin Lakes RD over Big Hole River 080 in Beaverhead County, Montana. It was built in 1999, so it is 26 years old, younger 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 86 ft (26.3 m) long and 26 ft wide. If it were closed, the detour would be 8.7 mi (14 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 | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Twin Lakes RD over Big Hole River 080 built?
It was built in 1999, making it 26 years old in 2025.
What condition is Twin Lakes RD over Big Hole River 080 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 October 2024.
How much traffic does Twin Lakes RD over Big Hole River 080 carry?
About 100 vehicles per day (2025 count), of which roughly 3% are trucks.
How long is Twin Lakes RD over Big Hole River 080?
The structure is 86 ft (26.3 m) long with a longest span of 82 ft (25 m) and a deck 26 ft wide.
Who owns Twin Lakes RD over Big Hole River 080?
It is owned by the County Highway Agency.