IRR Sd1806 over Oak Ck
Fair Condition63 years old368 vehicles/day
Location
| State | South Dakota |
| County | Corson |
| Location | 5.7 N Jct US 12 |
| Carries | IRR Sd1806 |
| Crosses | Oak Ck |
| Coordinates | 45.63778, -100.52472 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 7 (Good) |
| Superstructure | 6 (Satisfactory) |
| Substructure | 5 (Fair) |
| Channel/Waterway | 8 (Very Good) |
| Scour Critical | 7 — Countermeasures installed |
Physical Characteristics
| Material | Steel Continuous |
| Design | Stringer/Multi-beam |
| Total Length | 232.0 ft (70.7 m) |
| Max Span | 89.9 ft (27.4 m) |
| Deck Width | 26.2 ft (8 m) |
| Deck Area | 565.6 sq m |
| Main Spans | 3 |
| Year Built | 1963 |
Traffic
| Avg Daily Traffic | 368 (2024) |
| Truck Traffic | 6% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | October 2023 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 000000016720217 |