Salmon Prairie RD over Swan River 091
GoodLake County, Montana · 22M S Swan Lake · Structure no. L24701000+09001
- Built
- 1986
- 39 years old
- Condition
- Good
- inspected August 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 156 ft
- 2 main spans
- Daily traffic
- 100
- 2025 count
- Owner
- County
- County Highway Agency
About this bridge
Salmon Prairie RD over Swan River 091 is a prestressed concrete stringer/multi-beam or girder carrying Salmon Prairie RD over Swan River 091 in Lake County, Montana. It was built in 1986, so it is 39 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 100 vehicles a day, roughly 3% of them trucks, projected to reach 100 by 2040. The structure is 156 ft (47.4 m) long and 27 ft wide. If it were closed, the detour would be 123.7 mi (199 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 | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Salmon Prairie RD over Swan River 091 built?
It was built in 1986, making it 39 years old in 2025.
What condition is Salmon Prairie RD over Swan River 091 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 August 2024.
How much traffic does Salmon Prairie RD over Swan River 091 carry?
About 100 vehicles per day (2025 count), of which roughly 3% are trucks.
How long is Salmon Prairie RD over Swan River 091?
The structure is 156 ft (47.4 m) long with a longest span of 77 ft (23.5 m) and a deck 27 ft wide.
Who owns Salmon Prairie RD over Swan River 091?
It is owned by the County Highway Agency.