IRR - US 93 over Int Desmet I 90
FairMissoula County, Montana · 5M NW Missoula · Structure no. P00005000+00001
- Built
- 1966
- 59 years old, rebuilt 1995
- Condition
- Fair
- inspected June 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 346 ft
- 4 main spans
- Daily traffic
- 5,175
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
IRR - US 93 over Int Desmet I 90 is a prestressed concrete stringer/multi-beam or girder carrying IRR - US 93 over Int Desmet I 90 in Missoula County, Montana. It was built in 1966 and reconstructed in 1995, 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 5,175 vehicles a day, roughly 4% of them trucks, projected to reach 5,433 by 2043. The structure is 346 ft (105.5 m) long and 29 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 | 7 Good | Some minor problems. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was IRR - US 93 over Int Desmet I 90 built?
It was built in 1966, making it 59 years old in 2025. It was reconstructed in 1995.
What condition is IRR - US 93 over Int Desmet 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 June 2024.
How much traffic does IRR - US 93 over Int Desmet I 90 carry?
About 5,175 vehicles per day (2023 count), of which roughly 4% are trucks.
How long is IRR - US 93 over Int Desmet I 90?
The structure is 346 ft (105.5 m) long with a longest span of 96 ft (29.3 m) and a deck 29 ft wide.
Who owns IRR - US 93 over Int Desmet I 90?
It is owned by the State Highway Agency.