I 90 over Blackfoot River
GoodMissoula County, Montana · 0.6M W Bonner · Structure no. 000000000001434
- Built
- 2018
- 7 years old
- Condition
- Good
- inspected May 2024
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 486 ft
- 3 main spans
- Daily traffic
- 6,216
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
I 90 over Blackfoot River is a steel continuous stringer/multi-beam or girder carrying I 90 over Blackfoot River in Missoula County, Montana. It was built in 2018, so it is 7 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 6,216 vehicles a day, roughly 19% of them trucks, projected to reach 6,526 by 2043. The structure is 486 ft (148.2 m) long and 40 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 | 8 Very Good | No problems noted. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was I 90 over Blackfoot River built?
It was built in 2018, making it 7 years old in 2025.
What condition is I 90 over Blackfoot 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 May 2024.
How much traffic does I 90 over Blackfoot River carry?
About 6,216 vehicles per day (2023 count), of which roughly 19% are trucks.
How long is I 90 over Blackfoot River?
The structure is 486 ft (148.2 m) long with a longest span of 210 ft (64 m) and a deck 40 ft wide.
Who owns I 90 over Blackfoot River?
It is owned by the State Highway Agency.