460th Avenue over Boswell Diversion Ditch
Fair Condition97 years old129 vehicles/day
Location
| State | South Dakota |
| County | Hamlin |
| Location | 5.9s & 1e Of Castlewood |
| Carries | 460th Avenue |
| Crosses | Boswell Diversion Ditch |
| Coordinates | 44.64528, -97.00660 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 5 (Fair) |
| Superstructure | 6 (Satisfactory) |
| Substructure | 5 (Fair) |
| Channel/Waterway | 6 (Satisfactory) |
| Scour Critical | Unknown |
Physical Characteristics
| Material | Steel |
| Design | Stringer/Multi-beam |
| Total Length | 118.1 ft (36 m) |
| Max Span | 23.0 ft (7 m) |
| Deck Width | 21.0 ft (6.4 m) |
| Deck Area | 230.4 sq m |
| Main Spans | 5 |
| Year Built | 1929 |
Traffic
| Avg Daily Traffic | 129 (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 eligible for the National Register |
| Structure Number | 000000029240109 |