I 90 over Sep S-271
FairGranite County, Montana · 1.2M E Drummond · Structure no. I00090155+07872
- Built
- 1966
- 59 years old, rebuilt 2003
- Condition
- Fair
- inspected May 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 130 ft
- 3 main spans
- Daily traffic
- 4,666
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
I 90 over Sep S-271 is a prestressed concrete stringer/multi-beam or girder carrying I 90 over Sep S-271 in Granite County, Montana. It was built in 1966 and reconstructed in 2003, so it is 59 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 4,666 vehicles a day, roughly 24% of them trucks, projected to reach 4,969 by 2043. The structure is 130 ft (39.6 m) long and 39 ft wide. If it were closed, the detour would be 1.2 mi (2 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. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was I 90 over Sep S-271 built?
It was built in 1966, making it 59 years old in 2025. It was reconstructed in 2003.
What condition is I 90 over Sep S-271 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 I 90 over Sep S-271 carry?
About 4,666 vehicles per day (2023 count), of which roughly 24% are trucks.
How long is I 90 over Sep S-271?
The structure is 130 ft (39.6 m) long with a longest span of 46 ft (14 m) and a deck 39 ft wide.
Who owns I 90 over Sep S-271?
It is owned by the State Highway Agency.