478th Avenue over Big Sioux River
Good Condition4 years old231 vehicles/day
Location
| State | South Dakota |
| County | Moody |
| Location | 9n Of Egan |
| Carries | 478th Avenue |
| Crosses | Big Sioux River |
| Coordinates | 44.13222, -96.64843 |
Condition Ratings
| Overall Condition | Good |
| Deck | 8 (Very Good) |
| Superstructure | 8 (Very Good) |
| Substructure | 8 (Very Good) |
| Channel/Waterway | 8 (Very Good) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Prestressed Concrete |
| Design | Stringer/Multi-beam |
| Total Length | 245.1 ft (74.7 m) |
| Max Span | 85.0 ft (25.9 m) |
| Deck Width | 32.8 ft (10 m) |
| Deck Area | 747 sq m |
| Main Spans | 3 |
| Year Built | 2022 |
Traffic
| Avg Daily Traffic | 231 (2022) |
| Truck Traffic | 3% |
| 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 | 000000051120044 |