I 90 over Int Bearmouth
FairGranite County, Montana · Bearmouth · Structure no. I00090138+00851
- Built
- 1970
- 55 years old, rebuilt 2010
- Condition
- Fair
- inspected May 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 120 ft
- 3 main spans
- Daily traffic
- 6,541
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
I 90 over Int Bearmouth is a prestressed concrete stringer/multi-beam or girder carrying I 90 over Int Bearmouth in Granite County, Montana. It was built in 1970 and reconstructed in 2010, so it is 55 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 6,541 vehicles a day, roughly 18% of them trucks, projected to reach 6,998 by 2043. The structure is 120 ft (36.6 m) long and 40 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was I 90 over Int Bearmouth built?
It was built in 1970, making it 55 years old in 2025. It was reconstructed in 2010.
What condition is I 90 over Int Bearmouth 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 Int Bearmouth carry?
About 6,541 vehicles per day (2023 count), of which roughly 18% are trucks.
How long is I 90 over Int Bearmouth?
The structure is 120 ft (36.6 m) long with a longest span of 46 ft (14 m) and a deck 40 ft wide.
Who owns I 90 over Int Bearmouth?
It is owned by the State Highway Agency.