Fairmont RD over Int Gregson-I 90
FairSilver Bow County, Montana · 8M NW Rocker · Structure no. S00441000+00001
- Built
- 1967
- 58 years old, rebuilt 2000
- Condition
- Fair
- inspected February 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 264 ft
- 4 main spans
- Daily traffic
- 727
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
Fairmont RD over Int Gregson-I 90 is a prestressed concrete stringer/multi-beam or girder carrying Fairmont RD over Int Gregson-I 90 in Silver Bow County, Montana. It was built in 1967 and reconstructed in 2000, so it is 58 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 727 vehicles a day, roughly 2% of them trucks, projected to reach 763 by 2043. The structure is 264 ft (80.6 m) long and 31 ft wide. If it were closed, the detour would be 9.9 mi (16 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Fairmont RD over Int Gregson-I 90 built?
It was built in 1967, making it 58 years old in 2025. It was reconstructed in 2000.
What condition is Fairmont RD over Int Gregson-I 90 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 February 2023.
How much traffic does Fairmont RD over Int Gregson-I 90 carry?
About 727 vehicles per day (2023 count), of which roughly 2% are trucks.
How long is Fairmont RD over Int Gregson-I 90?
The structure is 264 ft (80.6 m) long with a longest span of 76 ft (23.3 m) and a deck 31 ft wide.
Who owns Fairmont RD over Int Gregson-I 90?
It is owned by the State Highway Agency.