S 59 over Yellowstone River
Fair Condition69 years old2,949 vehicles/day
Location
| State | Montana |
| County | Custer |
| Location | Miles City |
| Carries | S 59 |
| Crosses | Yellowstone River |
| Coordinates | 46.42081, -105.85990 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 6 (Satisfactory) |
| Superstructure | 5 (Fair) |
| Substructure | 6 (Satisfactory) |
| Channel/Waterway | 6 (Satisfactory) |
| Scour Critical | 5 — Stable for scour |
Physical Characteristics
| Material | Steel Continuous |
| Design | Girder and Floorbeam |
| Total Length | 976.0 ft (297.5 m) |
| Max Span | 180.1 ft (54.9 m) |
| Deck Width | 31.8 ft (9.7 m) |
| Deck Area | 2885.8 sq m |
| Main Spans | 6 |
| Year Built | 1957 |
Traffic
| Avg Daily Traffic | 2,949 (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 | P00018001+00921 |