S 446 over Yellowstone River
Fair Condition56 years old257 vehicles/day
Location
| State | Montana |
| County | Rosebud |
| Location | 1m W Rosebud |
| Carries | S 446 |
| Crosses | Yellowstone River |
| Coordinates | 46.27478, -106.46500 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 7 (Good) |
| Superstructure | 6 (Satisfactory) |
| Substructure | 6 (Satisfactory) |
| Channel/Waterway | 7 (Good) |
| Scour Critical | 5 — Stable for scour |
Physical Characteristics
| Material | Steel Continuous |
| Design | Girder and Floorbeam |
| Total Length | 683.1 ft (208.2 m) |
| Max Span | 172.6 ft (52.6 m) |
| Deck Width | 32.5 ft (9.9 m) |
| Deck Area | 2061.2 sq m |
| Main Spans | 4 |
| Year Built | 1970 |
Traffic
| Avg Daily Traffic | 257 (2023) |
| Truck Traffic | 3% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 623 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | S00446001+02661 |