IRR Us012 over Snake Ck
Fair Condition60 years old1,091 vehicles/day
Location
| State | South Dakota |
| County | Corson |
| Location | 1.5 NW Jct Sd 20 |
| Carries | IRR Us012 |
| Crosses | Snake Ck |
| Coordinates | 45.57485, -100.58758 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 7 (Good) |
| Superstructure | 6 (Satisfactory) |
| Substructure | 7 (Good) |
| Channel/Waterway | 6 (Satisfactory) |
| Scour Critical | 5 — Stable for scour |
Physical Characteristics
| Material | Steel Continuous |
| Design | Stringer/Multi-beam |
| Total Length | 143.4 ft (43.7 m) |
| Max Span | 55.1 ft (16.8 m) |
| Deck Width | 32.2 ft (9.8 m) |
| Deck Area | 428.3 sq m |
| Main Spans | 3 |
| Year Built | 1966 |
Traffic
| Avg Daily Traffic | 1,091 (2024) |
| Truck Traffic | 20% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 125 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 000000016689259 |