IRR - I 90 over Owl Creek
FairBig Horn County, Montana · 2.5M S Lodge Grass · Structure no. I00090532+07342
- Built
- 1985
- 40 years old
- Condition
- Fair
- inspected January 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 118 ft
- 1 main span
- Daily traffic
- 2,013
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
IRR - I 90 over Owl Creek is a prestressed concrete stringer/multi-beam or girder carrying IRR - I 90 over Owl Creek in Big Horn County, Montana. It was built in 1985, so it is 40 years old, younger 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 2,013 vehicles a day, roughly 24% of them trucks, projected to reach 2,153 by 2043. The structure is 118 ft (36 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was IRR - I 90 over Owl Creek built?
It was built in 1985, making it 40 years old in 2025.
What condition is IRR - I 90 over Owl Creek 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 January 2024.
How much traffic does IRR - I 90 over Owl Creek carry?
About 2,013 vehicles per day (2023 count), of which roughly 24% are trucks.
How long is IRR - I 90 over Owl Creek?
The structure is 118 ft (36 m) long with a longest span of 115 ft (35.1 m) and a deck 40 ft wide.
Who owns IRR - I 90 over Owl Creek?
It is owned by the State Highway Agency.