US 93 over Stillwater River
FairFlathead County, Montana · 2M NW Kalispell · Structure no. P00005116+01831
- Built
- 1996
- 29 years old
- Condition
- Fair
- inspected July 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 191 ft
- 3 main spans
- Daily traffic
- 25,919
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
US 93 over Stillwater River is a prestressed concrete stringer/multi-beam or girder carrying US 93 over Stillwater River in Flathead County, Montana. It was built in 1996, so it is 29 years old, younger 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 25,919 vehicles a day, roughly 1% of them trucks, projected to reach 28,511 by 2043. The structure is 191 ft (58.2 m) long and 80 ft wide. If it were closed, the detour would be 5 mi (8 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Superstructure | 8 Very Good | No problems noted. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was US 93 over Stillwater River built?
It was built in 1996, making it 29 years old in 2025.
What condition is US 93 over Stillwater River 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 July 2023.
How much traffic does US 93 over Stillwater River carry?
About 25,919 vehicles per day (2023 count), of which roughly 1% are trucks.
How long is US 93 over Stillwater River?
The structure is 191 ft (58.2 m) long with a longest span of 114 ft (34.6 m) and a deck 80 ft wide.
Who owns US 93 over Stillwater River?
It is owned by the State Highway Agency.