470th Avenue over Big Sioux Rv
Poor Condition96 years old1,330 vehicles/day
Location
| State | South Dakota |
| County | Brookings |
| Location | 0.6w & 4.1s Brookings |
| Carries | 470th Avenue |
| Crosses | Big Sioux Rv |
| Coordinates | 44.22107, -96.80944 |
Condition Ratings
| Overall Condition | Poor |
| Deck | 4 (Poor) |
| Superstructure | 5 (Fair) |
| Substructure | 5 (Fair) |
| Channel/Waterway | 8 (Very Good) |
| Scour Critical | Unknown |
Physical Characteristics
| Material | Steel |
| Design | Truss - Thru |
| Total Length | 77.1 ft (23.5 m) |
| Max Span | 75.1 ft (22.9 m) |
| Deck Width | 22.0 ft (6.7 m) |
| Deck Area | 157.4 sq m |
| Main Spans | 1 |
| Year Built | 1930 |
Traffic
| Avg Daily Traffic | 1,330 (2022) |
| Truck Traffic | 2% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | October 2024 |
| Inspection Frequency | Every 24 months |
| Owner | County Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 000000006159221 |