I 90 over Abandoned Railroad
FairMissoula County, Montana · 0.6M E Bonner · Structure no. I00090110+09391
- Built
- 1964
- 61 years old, rebuilt 1999
- Condition
- Fair
- inspected June 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 153 ft
- 3 main spans
- Daily traffic
- 6,216
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
I 90 over Abandoned Railroad is a prestressed concrete stringer/multi-beam or girder carrying I 90 over Abandoned Railroad in Missoula County, Montana. It was built in 1964 and reconstructed in 1999, so it is 61 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 6,216 vehicles a day, roughly 19% of them trucks, projected to reach 6,526 by 2043. The structure is 153 ft (46.6 m) long and 40 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 | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was I 90 over Abandoned Railroad built?
It was built in 1964, making it 61 years old in 2025. It was reconstructed in 1999.
What condition is I 90 over Abandoned Railroad 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 June 2024.
How much traffic does I 90 over Abandoned Railroad carry?
About 6,216 vehicles per day (2023 count), of which roughly 19% are trucks.
How long is I 90 over Abandoned Railroad?
The structure is 153 ft (46.6 m) long with a longest span of 52 ft (15.8 m) and a deck 40 ft wide.
Who owns I 90 over Abandoned Railroad?
It is owned by the State Highway Agency.