Sd46 over Big Sioux River
Fair Condition35 years old1,610 vehicles/day
Location
| State | South Dakota |
| County | Union |
| Location | At South Dakota Border |
| Carries | Sd46 |
| Crosses | Big Sioux River |
| Coordinates | 43.05147, -96.48936 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 6 (Satisfactory) |
| Superstructure | 7 (Good) |
| Substructure | 7 (Good) |
| Channel/Waterway | 7 (Good) |
| Scour Critical | 5 — Stable for scour |
Physical Characteristics
| Material | Prestressed Concrete |
| Design | Stringer/Multi-beam |
| Total Length | 518.0 ft (157.9 m) |
| Max Span | 97.1 ft (29.6 m) |
| Deck Width | 43.3 ft (13.2 m) |
| Deck Area | 2084.3 sq m |
| Main Spans | 6 |
| Year Built | 1991 |
Traffic
| Avg Daily Traffic | 1,610 (2023) |
| Truck Traffic | 24% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | October 2023 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 000000064160023 |