IRR - I 90 over Int Aberdeen
FairBig Horn County, Montana · Aberdeen · Structure no. I00090549+08822
- Built
- 1985
- 40 years old
- Condition
- Fair
- inspected December 2023
- Type
- Slab
- Concrete Continuous
- Length
- 79 ft
- 3 main spans
- Daily traffic
- 2,193
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
IRR - I 90 over Int Aberdeen is a concrete continuous slab carrying IRR - I 90 over Int Aberdeen 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 2,193 vehicles a day, roughly 22% of them trucks, projected to reach 2,346 by 2043. The structure is 79 ft (24.1 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 | 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 Int Aberdeen built?
It was built in 1985, making it 40 years old in 2025.
What condition is IRR - I 90 over Int Aberdeen 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 December 2023.
How much traffic does IRR - I 90 over Int Aberdeen carry?
About 2,193 vehicles per day (2023 count), of which roughly 22% are trucks.
How long is IRR - I 90 over Int Aberdeen?
The structure is 79 ft (24.1 m) long with a longest span of 30 ft (9.1 m) and a deck 40 ft wide.
Who owns IRR - I 90 over Int Aberdeen?
It is owned by the State Highway Agency.