S 263 over Int Frenchtown-I 90
FairMissoula County, Montana · Frenchtown · Structure no. S00263014+01031
- Built
- 1971
- 54 years old, rebuilt 2011
- Condition
- Fair
- inspected May 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 227 ft
- 4 main spans
- Daily traffic
- 100
- 2025 count
- Owner
- State
- State Highway Agency
About this bridge
S 263 over Int Frenchtown-I 90 is a prestressed concrete stringer/multi-beam or girder carrying S 263 over Int Frenchtown-I 90 in Missoula County, Montana. It was built in 1971 and reconstructed in 2011, so it is 54 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 100 vehicles a day, roughly 3% of them trucks, projected to reach 100 by 2040. The structure is 227 ft (69.2 m) long and 33 ft wide.
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 | 8 Very Good | No problems noted. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was S 263 over Int Frenchtown-I 90 built?
It was built in 1971, making it 54 years old in 2025. It was reconstructed in 2011.
What condition is S 263 over Int Frenchtown-I 90 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 May 2024.
How much traffic does S 263 over Int Frenchtown-I 90 carry?
About 100 vehicles per day (2025 count), of which roughly 3% are trucks.
How long is S 263 over Int Frenchtown-I 90?
The structure is 227 ft (69.2 m) long with a longest span of 78 ft (23.8 m) and a deck 33 ft wide.
Who owns S 263 over Int Frenchtown-I 90?
It is owned by the State Highway Agency.