S 209 over Swan River
GoodFlathead County, Montana · 5M E Big Fork · Structure no. 000000000006381
- Built
- 2018
- 7 years old
- Condition
- Good
- inspected September 2024
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 212 ft
- 1 main span
- Daily traffic
- 1,968
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
S 209 over Swan River is a steel stringer/multi-beam or girder carrying S 209 over Swan River in Flathead County, Montana. It was built in 2018, so it is 7 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 1,968 vehicles a day, roughly 2% of them trucks, projected to reach 2,066 by 2043. The structure is 212 ft (64.5 m) long and 43 ft wide. If it were closed, the detour would be 47.2 mi (76 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 | 8 Very Good | No problems noted. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was S 209 over Swan River built?
It was built in 2018, making it 7 years old in 2025.
What condition is S 209 over Swan 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 209 over Swan River carry?
About 1,968 vehicles per day (2023 count), of which roughly 2% are trucks.
How long is S 209 over Swan River?
The structure is 212 ft (64.5 m) long with a longest span of 205 ft (62.6 m) and a deck 43 ft wide.
Who owns S 209 over Swan River?
It is owned by the State Highway Agency.