478th Avenue over Big Sioux River
Good Condition32 years old430 vehicles/day
Location
| State | South Dakota |
| County | Moody |
| Location | 1s Of Egan |
| Carries | 478th Avenue |
| Crosses | Big Sioux River |
| Coordinates | 43.98716, -96.64943 |
Condition Ratings
| Overall Condition | Good |
| Deck | 7 (Good) |
| Superstructure | 8 (Very Good) |
| Substructure | 7 (Good) |
| Channel/Waterway | 8 (Very Good) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Prestressed Concrete Continuous |
| Design | Stringer/Multi-beam |
| Total Length | 259.8 ft (79.2 m) |
| Max Span | 89.9 ft (27.4 m) |
| Deck Width | 34.8 ft (10.6 m) |
| Deck Area | 839.5 sq m |
| Main Spans | 3 |
| Year Built | 1994 |
Traffic
| Avg Daily Traffic | 430 (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 | 000000051120144 |