S 41 over Jefferson River
FairMadison County, Montana · 3M S Silverstar · Structure no. P00029049+08261
- Built
- 1992
- 33 years old
- Condition
- Fair
- inspected August 2024
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 462 ft
- 4 main spans
- Daily traffic
- 2,195
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
S 41 over Jefferson River is a steel continuous stringer/multi-beam or girder carrying S 41 over Jefferson River in Madison County, Montana. It was built in 1992, so it is 33 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 2,195 vehicles a day, roughly 13% of them trucks, projected to reach 2,305 by 2043. The structure is 462 ft (140.9 m) long and 41 ft wide. If it were closed, the detour would be 110 mi (177 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was S 41 over Jefferson River built?
It was built in 1992, making it 33 years old in 2025.
What condition is S 41 over Jefferson River 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 August 2024.
How much traffic does S 41 over Jefferson River carry?
About 2,195 vehicles per day (2023 count), of which roughly 13% are trucks.
How long is S 41 over Jefferson River?
The structure is 462 ft (140.9 m) long with a longest span of 126 ft (38.4 m) and a deck 41 ft wide.
Who owns S 41 over Jefferson River?
It is owned by the State Highway Agency.