257 ST over I029
Fair Condition63 years old160 vehicles/day
Location
| State | South Dakota |
| County | Minnehaha |
| Location | 3.3 N I 90 Interch |
| Carries | 257 ST |
| Crosses | I029 |
| Coordinates | 43.65981, -96.77743 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 7 (Good) |
| Superstructure | 6 (Satisfactory) |
| Substructure | 6 (Satisfactory) |
| Scour Critical | Not applicable |
Physical Characteristics
| Material | Steel Continuous |
| Design | Stringer/Multi-beam |
| Total Length | 256.2 ft (78.1 m) |
| Max Span | 70.9 ft (21.6 m) |
| Deck Width | 32.5 ft (9.9 m) |
| Deck Area | 773.2 sq m |
| Main Spans | 4 |
| Year Built | 1963 |
Traffic
| Avg Daily Traffic | 160 (2023) |
| Truck Traffic | 2% |
| 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 | 000000050177130 |