S 40 over Whitefish River
GoodFlathead County, Montana · 3M SE Whitefish · Structure no. P00038001+06861
- Built
- 1975
- 50 years old
- Condition
- Good
- inspected September 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 143 ft
- 2 main spans
- Daily traffic
- 13,795
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
S 40 over Whitefish River is a prestressed concrete stringer/multi-beam or girder carrying S 40 over Whitefish River in Flathead County, Montana. It was built in 1975, so it is 50 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 13,795 vehicles a day, roughly 1% of them trucks, projected to reach 15,519 by 2043. The structure is 143 ft (43.6 m) long and 50 ft wide. If it were closed, the detour would be 19.9 mi (32 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 S 40 over Whitefish River built?
It was built in 1975, making it 50 years old in 2025.
What condition is S 40 over Whitefish 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 September 2024.
How much traffic does S 40 over Whitefish River carry?
About 13,795 vehicles per day (2023 count), of which roughly 1% are trucks.
How long is S 40 over Whitefish River?
The structure is 143 ft (43.6 m) long with a longest span of 71 ft (21.6 m) and a deck 50 ft wide.
Who owns S 40 over Whitefish River?
It is owned by the State Highway Agency.