I 90 over Sep Juniper Dr-Clark Fk
FairMissoula County, Montana · 1.2M W Bonner · Structure no. I00090109+04091
- Built
- 1965
- 60 years old, rebuilt 1999
- Condition
- Fair
- inspected April 2024
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 409 ft
- 2 main spans
- Daily traffic
- 10,294
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
I 90 over Sep Juniper Dr-Clark Fk is a steel continuous stringer/multi-beam or girder carrying I 90 over Sep Juniper Dr-Clark Fk in Missoula County, Montana. It was built in 1965 and reconstructed in 1999, so it is 60 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 5 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 10,294 vehicles a day, roughly 11% of them trucks, projected to reach 10,808 by 2043. The structure is 409 ft (124.6 m) long and 32 ft wide. If it were closed, the detour would be 1.2 mi (2 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| 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 Sep Juniper Dr-Clark Fk built?
It was built in 1965, making it 60 years old in 2025. It was reconstructed in 1999.
What condition is I 90 over Sep Juniper Dr-Clark Fk 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 April 2024.
How much traffic does I 90 over Sep Juniper Dr-Clark Fk carry?
About 10,294 vehicles per day (2023 count), of which roughly 11% are trucks.
How long is I 90 over Sep Juniper Dr-Clark Fk?
The structure is 409 ft (124.6 m) long with a longest span of 126 ft (38.4 m) and a deck 32 ft wide.
Who owns I 90 over Sep Juniper Dr-Clark Fk?
It is owned by the State Highway Agency.