459th Avenue over Boswell Diversion Ditch
Fair Condition70 years old253 vehicles/day
Location
| State | South Dakota |
| County | Hamlin |
| Location | 6.5s Of Castlewood |
| Carries | 459th Avenue |
| Crosses | Boswell Diversion Ditch |
| Coordinates | 44.63709, -97.02703 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 6 (Satisfactory) |
| Superstructure | 6 (Satisfactory) |
| Substructure | 6 (Satisfactory) |
| Channel/Waterway | 7 (Good) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Concrete Continuous |
| Design | Slab |
| Total Length | 106.0 ft (32.3 m) |
| Max Span | 40.0 ft (12.2 m) |
| Deck Width | 28.2 ft (8.6 m) |
| Deck Area | 277.8 sq m |
| Main Spans | 3 |
| Year Built | 1956 |
Traffic
| Avg Daily Traffic | 253 (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 | 000000029230115 |