Frontage Road 146 over Clark Fork River 034
Fair Condition95 years old100 vehicles/day
Location
| State | Montana |
| County | Deer Lodge |
| Location | 4m S Warm Springs |
| Carries | Frontage Road 146 |
| Crosses | Clark Fork River 034 |
| Coordinates | 46.12247, -112.79933 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 6 (Satisfactory) |
| Superstructure | 5 (Fair) |
| Substructure | 5 (Fair) |
| Channel/Waterway | 7 (Good) |
| Scour Critical | 5 — Stable for scour |
Physical Characteristics
| Material | Concrete |
| Design | Tee Beam |
| Total Length | 75.1 ft (22.9 m) |
| Max Span | 37.4 ft (11.4 m) |
| Deck Width | 39.0 ft (11.9 m) |
| Deck Area | 272.5 sq m |
| Main Spans | 2 |
| Year Built | 1931 (reconstructed 1941) |
Traffic
| Avg Daily Traffic | 100 (2025) |
| Truck Traffic | 3% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 124 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | L12146001+01001 |