IRR Ar Sd273 over Medicine Ck
Fair Condition59 years old464 vehicles/day
Location
| State | South Dakota |
| County | Lyman |
| Location | 0.2 N I 90 @ Kennebec |
| Carries | IRR Ar Sd273 |
| Crosses | Medicine Ck |
| Coordinates | 43.90071, -99.86557 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 6 (Satisfactory) |
| Superstructure | 6 (Satisfactory) |
| Substructure | 5 (Fair) |
| Channel/Waterway | 5 (Fair) |
| Scour Critical | 5 — Stable for scour |
Physical Characteristics
| Material | Concrete Continuous |
| Design | Slab |
| Total Length | 172.9 ft (52.7 m) |
| Max Span | 44.9 ft (13.7 m) |
| Deck Width | 39.4 ft (12 m) |
| Deck Area | 632.4 sq m |
| Main Spans | 4 |
| Year Built | 1967 |
Traffic
| Avg Daily Traffic | 464 (2024) |
| Truck Traffic | 23% |
| 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 | 000000043250204 |