I 90 over Clark Fork River
GoodDeer Lodge County, Montana · 2.5M N Opportunity · Structure no. I00090205+07151
- Built
- 1978
- 47 years old
- Condition
- Good
- inspected March 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 86 ft
- 1 main span
- Daily traffic
- 5,209
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
I 90 over Clark Fork River is a prestressed concrete stringer/multi-beam or girder carrying I 90 over Clark Fork River in Deer Lodge County, Montana. It was built in 1978, so it is 47 years old, younger 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 5,209 vehicles a day, roughly 24% of them trucks, projected to reach 5,599 by 2043. The structure is 86 ft (26.2 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 | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was I 90 over Clark Fork River built?
It was built in 1978, making it 47 years old in 2025.
What condition is I 90 over Clark Fork River 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 March 2024.
How much traffic does I 90 over Clark Fork River carry?
About 5,209 vehicles per day (2023 count), of which roughly 24% are trucks.
How long is I 90 over Clark Fork River?
The structure is 86 ft (26.2 m) long with a longest span of 85 ft (25.9 m) and a deck 44 ft wide.
Who owns I 90 over Clark Fork River?
It is owned by the State Highway Agency.