Sd1804 over Blue Blanket Ck
Fair Condition65 years old272 vehicles/day
Location
| State | South Dakota |
| County | Walworth |
| Location | 2.5 S Jct US 12 |
| Carries | Sd1804 |
| Crosses | Blue Blanket Ck |
| Coordinates | 45.50957, -100.32199 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 6 (Satisfactory) |
| Superstructure | 6 (Satisfactory) |
| Substructure | 5 (Fair) |
| Channel/Waterway | 7 (Good) |
| Scour Critical | 7 — Countermeasures installed |
Physical Characteristics
| Material | Concrete Continuous |
| Design | Slab |
| Total Length | 128.6 ft (39.2 m) |
| Max Span | 25.9 ft (7.9 m) |
| Deck Width | 28.2 ft (8.6 m) |
| Deck Area | 337.1 sq m |
| Main Spans | 5 |
| Year Built | 1961 |
Traffic
| Avg Daily Traffic | 272 (2024) |
| Truck Traffic | 6% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | December 2024 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 000000065072059 |