Duncan District RD over Ruby River 022
FairMadison County, Montana · 4M SW Sheridan · Structure no. L29170004+00001
- Built
- 2010
- 15 years old
- Condition
- Fair
- inspected September 2023
- Type
- Tee Beam
- Prestressed Concrete
- Length
- 65 ft
- 1 main span
- Daily traffic
- 100
- 2025 count
- Owner
- County
- County Highway Agency
About this bridge
Duncan District RD over Ruby River 022 is a prestressed concrete tee beam carrying Duncan District RD over Ruby River 022 in Madison County, Montana. It was built in 2010, so it is 15 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 65 ft (19.8 m) long and 27 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 | 7 Good | Some minor problems. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 7 Good | Some minor problems. |
| 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 Duncan District RD over Ruby River 022 built?
It was built in 2010, making it 15 years old in 2025.
What condition is Duncan District RD over Ruby River 022 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 September 2023.
How much traffic does Duncan District RD over Ruby River 022 carry?
About 100 vehicles per day (2025 count), of which roughly 3% are trucks.
How long is Duncan District RD over Ruby River 022?
The structure is 65 ft (19.8 m) long with a longest span of 61 ft (18.6 m) and a deck 27 ft wide.
Who owns Duncan District RD over Ruby River 022?
It is owned by the County Highway Agency.