470th Avenue over N Fork Whetstone River
Fair Condition38 years old55 vehicles/day
Location
| State | South Dakota |
| County | Roberts |
| Location | 3n & 2w Of Corona |
| Carries | 470th Avenue |
| Crosses | N Fork Whetstone River |
| Coordinates | 45.38363, -96.80087 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 7 (Good) |
| Superstructure | 6 (Satisfactory) |
| Substructure | 7 (Good) |
| Channel/Waterway | 8 (Very Good) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Concrete Continuous |
| Design | Slab |
| Total Length | 77.1 ft (23.5 m) |
| Max Span | 28.5 ft (8.7 m) |
| Deck Width | 34.4 ft (10.5 m) |
| Deck Area | 246.8 sq m |
| Main Spans | 3 |
| Year Built | 1988 |
Traffic
| Avg Daily Traffic | 55 (2022) |
| Truck Traffic | 2% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 624 |
| Inspection Frequency | Every 24 months |
| Owner | County Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 000000055210381 |