I 90 Eastbound over Boulder River
GoodJefferson County, Montana · 0.6M E Cardwell · Structure no. I00090256+08671
- Built
- 1968
- 57 years old
- Condition
- Good
- inspected October 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 124 ft
- 2 main spans
- Daily traffic
- 5,599
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
I 90 Eastbound over Boulder River is a prestressed concrete stringer/multi-beam or girder carrying I 90 Eastbound over Boulder River in Jefferson County, Montana. It was built in 1968, so it is 57 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 5,599 vehicles a day, roughly 18% of them trucks, projected to reach 6,214 by 2043. The structure is 124 ft (37.7 m) long and 38 ft wide. If it were closed, the detour would be 80.2 mi (129 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 Eastbound over Boulder River built?
It was built in 1968, making it 57 years old in 2025.
What condition is I 90 Eastbound over Boulder 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 October 2023.
How much traffic does I 90 Eastbound over Boulder River carry?
About 5,599 vehicles per day (2023 count), of which roughly 18% are trucks.
How long is I 90 Eastbound over Boulder River?
The structure is 124 ft (37.7 m) long with a longest span of 56 ft (17.1 m) and a deck 38 ft wide.
Who owns I 90 Eastbound over Boulder River?
It is owned by the State Highway Agency.