Frontage Road 146 over Drainage 025
Fair Condition95 years old100 vehicles/day
Location
| State | Montana |
| County | Deer Lodge |
| Location | 4m S Warm Springs |
| Carries | Frontage Road 146 |
| Crosses | Drainage 025 |
| Coordinates | 46.13591, -112.79673 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 6 (Satisfactory) |
| Superstructure | 5 (Fair) |
| Substructure | 5 (Fair) |
| Channel/Waterway | 7 (Good) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Concrete |
| Design | Tee Beam |
| Total Length | 35.1 ft (10.7 m) |
| Max Span | 35.1 ft (10.7 m) |
| Deck Width | 38.7 ft (11.8 m) |
| Deck Area | 126.3 sq m |
| Main Spans | 1 |
| Year Built | 1931 (reconstructed 1940) |
Traffic
| Avg Daily Traffic | 100 (2025) |
| Truck Traffic | 3% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 125 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | L12146002+06001 |