Salmon Prairie RD over Swan River 091
Good Condition40 years old100 vehicles/day
Location
| State | Montana |
| County | Lake |
| Location | 22m S Swan Lake |
| Carries | Salmon Prairie RD |
| Crosses | Swan River 091 |
| Coordinates | 47.62957, -113.78584 |
Condition Ratings
| Overall Condition | Good |
| Deck | 7 (Good) |
| Superstructure | 7 (Good) |
| Substructure | 7 (Good) |
| Channel/Waterway | 8 (Very Good) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Prestressed Concrete |
| Design | Stringer/Multi-beam |
| Total Length | 155.5 ft (47.4 m) |
| Max Span | 77.1 ft (23.5 m) |
| Deck Width | 27.2 ft (8.3 m) |
| Deck Area | 393.4 sq m |
| Main Spans | 2 |
| Year Built | 1986 |
Traffic
| Avg Daily Traffic | 100 (2025) |
| Truck Traffic | 3% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 824 |
| Inspection Frequency | Every 24 months |
| Owner | County Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | L24701000+09001 |