IRR Us012 over Missouri Rv (oahe Lk)
Fair Condition67 years old2,071 vehicles/day
Location
| State | South Dakota |
| County | Walworth |
| Location | Corson - Walworth Co LN |
| Carries | IRR Us012 |
| Crosses | Missouri Rv (oahe Lk) |
| Coordinates | 45.56114, -100.46131 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 7 (Good) |
| Superstructure | 5 (Fair) |
| Substructure | 5 (Fair) |
| Channel/Waterway | 8 (Very Good) |
| Scour Critical | 5 — Stable for scour |
Physical Characteristics
| Material | Steel Continuous |
| Design | Truss - Thru |
| Total Length | 5058.4 ft (1541.8 m) |
| Max Span | 449.8 ft (137.1 m) |
| Deck Width | 28.5 ft (8.7 m) |
| Deck Area | 13413.7 sq m |
| Main Spans | 5 |
| Year Built | 1959 (reconstructed 1980) |
Traffic
| Avg Daily Traffic | 2,071 (2024) |
| Truck Traffic | 12% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 924 |
| Inspection Frequency | Every 12 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 000000065000020 |