474th Avenue over Big Sioux River
Good Condition29 years old178 vehicles/day
Location
| State | South Dakota |
| County | Minnehaha |
| Location | 1.8s & 0.4w Dell Rapids |
| Carries | 474th Avenue |
| Crosses | Big Sioux River |
| Coordinates | 43.79646, -96.72912 |
Condition Ratings
| Overall Condition | Good |
| Deck | 7 (Good) |
| Superstructure | 7 (Good) |
| Substructure | 7 (Good) |
| Channel/Waterway | 6 (Satisfactory) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Prestressed Concrete |
| Design | Stringer/Multi-beam |
| Total Length | 155.8 ft (47.5 m) |
| Max Span | 53.5 ft (16.3 m) |
| Deck Width | 34.4 ft (10.5 m) |
| Deck Area | 498.8 sq m |
| Main Spans | 3 |
| Year Built | 1997 |
Traffic
| Avg Daily Traffic | 178 (2022) |
| Truck Traffic | 2% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 723 |
| Inspection Frequency | Every 24 months |
| Owner | County Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 000000050200035 |