30770 478 Ave. over Ck
Fair Condition86 years old35 vehicles/day
Location
| State | South Dakota |
| County | Union |
| Location | 1w & 6.7s Alcester |
| Carries | 30770 478 Ave. |
| Crosses | Ck |
| Coordinates | 42.92876, -96.64634 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 6 (Satisfactory) |
| Superstructure | 6 (Satisfactory) |
| Substructure | 7 (Good) |
| Channel/Waterway | 7 (Good) |
| Scour Critical | Unknown |
Physical Characteristics
| Material | Steel |
| Design | Stringer/Multi-beam |
| Total Length | 23.0 ft (7 m) |
| Max Span | 21.7 ft (6.6 m) |
| Deck Width | 21.7 ft (6.6 m) |
| Deck Area | 46.2 sq m |
| Main Spans | 1 |
| Year Built | 1940 (reconstructed 1973) |
Traffic
| Avg Daily Traffic | 35 (2022) |
| Truck Traffic | 2% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 824 |
| Inspection Frequency | Every 24 months |
| Owner | County Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 000000064080107 |