IRR Sd1806 over Oahe Lk (grand Rv)
Fair Condition63 years old826 vehicles/day
Location
| State | South Dakota |
| County | Corson |
| Location | 0.4 N Jct US 12 |
| Carries | IRR Sd1806 |
| Crosses | Oahe Lk (grand Rv) |
| Coordinates | 45.58844, -100.49383 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 8 (Very Good) |
| Superstructure | 6 (Satisfactory) |
| Substructure | 5 (Fair) |
| Channel/Waterway | 6 (Satisfactory) |
| Scour Critical | 5 — Stable for scour |
Physical Characteristics
| Material | Steel Continuous |
| Design | Stringer/Multi-beam |
| Total Length | 4001.3 ft (1219.6 m) |
| Max Span | 140.1 ft (42.7 m) |
| Deck Width | 26.2 ft (8 m) |
| Deck Area | 9756.8 sq m |
| Main Spans | 32 |
| Year Built | 1963 |
Traffic
| Avg Daily Traffic | 826 (2024) |
| Truck Traffic | 5% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 623 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 000000016737253 |