459th Avenue over Big Sioux River
Good Condition8 years old375 vehicles/day
Location
| State | South Dakota |
| County | Hamlin |
| Location | 1.9s Of Castlewood |
| Carries | 459th Avenue |
| Crosses | Big Sioux River |
| Coordinates | 44.70387, -97.02680 |
Condition Ratings
| Overall Condition | Good |
| Deck | 7 (Good) |
| Superstructure | 7 (Good) |
| Substructure | 8 (Very Good) |
| Channel/Waterway | 7 (Good) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Prestressed Concrete |
| Design | Stringer/Multi-beam |
| Total Length | 233.9 ft (71.3 m) |
| Max Span | 82.0 ft (25 m) |
| Deck Width | 34.1 ft (10.4 m) |
| Deck Area | 741.5 sq m |
| Main Spans | 3 |
| Year Built | 2018 |
Traffic
| Avg Daily Traffic | 375 (2022) |
| Truck Traffic | 2% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 724 |
| Inspection Frequency | Every 24 months |
| Owner | County Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 000000029230069 |