US Highway 12 over Little Missouri River
Fair Condition76 years old580 vehicles/day
Location
| State | North Dakota |
| County | Slope |
| Location | At Marmarth |
| Carries | US Highway 12 |
| Crosses | Little Missouri River |
| Coordinates | 46.29785, -103.91658 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 6 (Satisfactory) |
| Superstructure | 7 (Good) |
| Substructure | 6 (Satisfactory) |
| Channel/Waterway | 7 (Good) |
| Scour Critical | 5 — Stable for scour |
Physical Characteristics
| Material | Steel Continuous |
| Design | Stringer/Multi-beam |
| Total Length | 414.0 ft (126.2 m) |
| Max Span | 89.9 ft (27.4 m) |
| Deck Width | 44.9 ft (13.7 m) |
| Deck Area | 1728.9 sq m |
| Main Spans | 5 |
| Year Built | 1950 (reconstructed 1987) |
Traffic
| Avg Daily Traffic | 580 (2019) |
| Truck Traffic | 24% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 722 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 0012006555 |