IRR - I 90 over Int Lodge Grass
FairBig Horn County, Montana · Lodge Grass · Structure no. I00090530+06772
- Built
- 1980
- 45 years old
- Condition
- Fair
- inspected January 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 103 ft
- 1 main span
- Daily traffic
- 2,013
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
IRR - I 90 over Int Lodge Grass is a prestressed concrete stringer/multi-beam or girder carrying IRR - I 90 over Int Lodge Grass in Big Horn County, Montana. It was built in 1980, so it is 45 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 103 ft (31.4 m) long and 44 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 Lodge Grass built?
It was built in 1980, making it 45 years old in 2025.
What condition is IRR - I 90 over Int Lodge Grass 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 Int Lodge Grass carry?
About 2,013 vehicles per day (2023 count), of which roughly 24% are trucks.
How long is IRR - I 90 over Int Lodge Grass?
The structure is 103 ft (31.4 m) long with a longest span of 100 ft (30.5 m) and a deck 44 ft wide.
Who owns IRR - I 90 over Int Lodge Grass?
It is owned by the State Highway Agency.