IRR - I 90 over RR (not in Use)
FairBig Horn County, Montana · Hardin · Structure no. I00090496+06251
- Built
- 1971
- 54 years old
- Condition
- Fair
- inspected July 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 163 ft
- 3 main spans
- Daily traffic
- 3,853
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
IRR - I 90 over RR (not in Use) is a prestressed concrete stringer/multi-beam or girder carrying IRR - I 90 over RR (not in Use) in Big Horn County, Montana. It was built in 1971, so it is 54 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 3,853 vehicles a day, roughly 20% of them trucks, projected to reach 4,045 by 2043. The structure is 163 ft (49.7 m) long and 44 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 IRR - I 90 over RR (not in Use) built?
It was built in 1971, making it 54 years old in 2025.
What condition is IRR - I 90 over RR (not in Use) 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 July 2024.
How much traffic does IRR - I 90 over RR (not in Use) carry?
About 3,853 vehicles per day (2023 count), of which roughly 20% are trucks.
How long is IRR - I 90 over RR (not in Use)?
The structure is 163 ft (49.7 m) long with a longest span of 62 ft (18.9 m) and a deck 44 ft wide.
Who owns IRR - I 90 over RR (not in Use)?
It is owned by the State Highway Agency.