Lewis LN over Ruby River 021
FairMadison County, Montana · 5M W Sheridan · Structure no. L29167002+09001
- Built
- 1975
- 50 years old
- Condition
- Fair
- inspected September 2023
- Type
- Tee Beam
- Prestressed Concrete
- Length
- 42 ft
- 1 main span
- Daily traffic
- 252
- 2023 count
- Owner
- County
- County Highway Agency
About this bridge
Lewis LN over Ruby River 021 is a prestressed concrete tee beam carrying Lewis LN over Ruby River 021 in Madison County, Montana. It was built in 1975, so it is 50 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 252 vehicles a day, roughly 3% of them trucks, projected to reach 270 by 2043. The structure is 42 ft (12.8 m) long and 25 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| 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 Lewis LN over Ruby River 021 built?
It was built in 1975, making it 50 years old in 2025.
What condition is Lewis LN over Ruby River 021 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 Lewis LN over Ruby River 021 carry?
About 252 vehicles per day (2023 count), of which roughly 3% are trucks.
How long is Lewis LN over Ruby River 021?
The structure is 42 ft (12.8 m) long with a longest span of 40 ft (12.2 m) and a deck 25 ft wide.
Who owns Lewis LN over Ruby River 021?
It is owned by the County Highway Agency.