I 90 over Sep Airway Blvd
GoodMissoula County, Montana · Airport Interchange · Structure no. I00090099+09351
- Built
- 1997
- 28 years old
- Condition
- Good
- inspected December 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 155 ft
- 3 main spans
- Daily traffic
- 12,090
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
I 90 over Sep Airway Blvd is a prestressed concrete stringer/multi-beam or girder carrying I 90 over Sep Airway Blvd in Missoula County, Montana. It was built in 1997, so it is 28 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 12,090 vehicles a day, roughly 10% of them trucks, projected to reach 12,694 by 2043. The structure is 155 ft (47.2 m) long and 40 ft wide.
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. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was I 90 over Sep Airway Blvd built?
It was built in 1997, making it 28 years old in 2025.
What condition is I 90 over Sep Airway Blvd 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 December 2023.
How much traffic does I 90 over Sep Airway Blvd carry?
About 12,090 vehicles per day (2023 count), of which roughly 10% are trucks.
How long is I 90 over Sep Airway Blvd?
The structure is 155 ft (47.2 m) long with a longest span of 74 ft (22.6 m) and a deck 40 ft wide.
Who owns I 90 over Sep Airway Blvd?
It is owned by the State Highway Agency.