306 ST (fas 6370) over I029
Fair Condition66 years old270 vehicles/day
Location
| State | South Dakota |
| County | Union |
| Location | 9.0 S Sd 46 Interchange |
| Carries | 306 ST (fas 6370) |
| Crosses | I029 |
| Coordinates | 42.95355, -96.79449 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 6 (Satisfactory) |
| Superstructure | 6 (Satisfactory) |
| Substructure | 6 (Satisfactory) |
| Scour Critical | Not applicable |
Physical Characteristics
| Material | Steel Continuous |
| Design | Stringer/Multi-beam |
| Total Length | 252.3 ft (76.9 m) |
| Max Span | 69.9 ft (21.3 m) |
| Deck Width | 32.8 ft (10 m) |
| Deck Area | 769 sq m |
| Main Spans | 4 |
| Year Built | 1960 (reconstructed 1988) |
Traffic
| Avg Daily Traffic | 270 (2023) |
| Truck Traffic | 3% |
| Lanes On Bridge | 2 |
| Lanes Under Bridge | 4 |
Inspection & Ownership
| Last Inspection | 225 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 000000064006090 |