Primrose LN over Jefferson River Overflow
FairMadison County, Montana · 2M E Silverstar · Structure no. S00422001+05001
- Built
- 1977
- 48 years old
- Condition
- Fair
- inspected October 2023
- Type
- Tee Beam
- Prestressed Concrete
- Length
- 36 ft
- 1 main span
- Daily traffic
- 110
- 2023 count
- Owner
- County
- County Highway Agency
About this bridge
Primrose LN over Jefferson River Overflow is a prestressed concrete tee beam carrying Primrose LN over Jefferson River Overflow in Madison County, Montana. It was built in 1977, so it is 48 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 110 vehicles a day, roughly 1% of them trucks, projected to reach 116 by 2043. The structure is 36 ft (11 m) long and 24 ft wide. If it were closed, the detour would be 16.2 mi (26 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| 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 Primrose LN over Jefferson River Overflow built?
It was built in 1977, making it 48 years old in 2025.
What condition is Primrose LN over Jefferson River Overflow 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 2023.
How much traffic does Primrose LN over Jefferson River Overflow carry?
About 110 vehicles per day (2023 count), of which roughly 1% are trucks.
How long is Primrose LN over Jefferson River Overflow?
The structure is 36 ft (11 m) long with a longest span of 34 ft (10.4 m) and a deck 24 ft wide.
Who owns Primrose LN over Jefferson River Overflow?
It is owned by the County Highway Agency.