I 90 over Fly Creek
GoodBig Horn County, Montana · 16.8M W Hardin · Structure no. I00090479+03981
- Built
- 1972
- 53 years old
- Condition
- Good
- inspected October 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 114 ft
- 2 main spans
- Daily traffic
- 3,736
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
I 90 over Fly Creek is a prestressed concrete stringer/multi-beam or girder carrying I 90 over Fly Creek in Big Horn County, Montana. It was built in 1972, so it is 53 years old, older than the Montana average of 47 years.
The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 3,736 vehicles a day, roughly 23% of them trucks, projected to reach 3,923 by 2043. The structure is 114 ft (34.8 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
All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| 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 I 90 over Fly Creek built?
It was built in 1972, making it 53 years old in 2025.
What condition is I 90 over Fly Creek in?
The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in October 2024.
How much traffic does I 90 over Fly Creek carry?
About 3,736 vehicles per day (2023 count), of which roughly 23% are trucks.
How long is I 90 over Fly Creek?
The structure is 114 ft (34.8 m) long with a longest span of 56 ft (17 m) and a deck 44 ft wide.
Who owns I 90 over Fly Creek?
It is owned by the State Highway Agency.