Johnny Ridge RD over Madison River 001
FairMadison County, Montana · 7M S Cameron · Structure no. L29092000+07001
- Built
- 1967
- 58 years old
- Condition
- Fair
- inspected December 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 278 ft
- 3 main spans
- Daily traffic
- 417
- 2023 count
- Owner
- County
- County Highway Agency
About this bridge
Johnny Ridge RD over Madison River 001 is a prestressed concrete stringer/multi-beam or girder carrying Johnny Ridge RD over Madison River 001 in Madison County, Montana. It was built in 1967, so it is 58 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.
It carries about 417 vehicles a day, roughly 3% of them trucks, projected to reach 446 by 2043. The structure is 278 ft (84.7 m) long and 33 ft wide. If it were closed, the detour would be 123.7 mi (199 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Johnny Ridge RD over Madison River 001 built?
It was built in 1967, making it 58 years old in 2025.
What condition is Johnny Ridge RD over Madison River 001 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 2024.
How much traffic does Johnny Ridge RD over Madison River 001 carry?
About 417 vehicles per day (2023 count), of which roughly 3% are trucks.
How long is Johnny Ridge RD over Madison River 001?
The structure is 278 ft (84.7 m) long with a longest span of 95 ft (29 m) and a deck 33 ft wide.
Who owns Johnny Ridge RD over Madison River 001?
It is owned by the County Highway Agency.