Thunderhead Falls over Rapid Ck
Poor Condition54 years old218 vehicles/day
Location
| State | South Dakota |
| County | Pennington |
| Location | 1.2e 1.4s Johnson Siding |
| Carries | Thunderhead Falls |
| Crosses | Rapid Ck |
| Coordinates | 44.06463, -103.41250 |
Condition Ratings
| Overall Condition | Poor |
| Deck | 6 (Satisfactory) |
| Superstructure | 4 (Poor) |
| Substructure | 6 (Satisfactory) |
| Channel/Waterway | 8 (Very Good) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Prestressed Concrete |
| Design | Tee Beam |
| Total Length | 40.0 ft (12.2 m) |
| Max Span | 39.0 ft (11.9 m) |
| Deck Width | 26.9 ft (8.2 m) |
| Deck Area | 100.0 sq m |
| Main Spans | 1 |
| Year Built | 1972 |
Traffic
| Avg Daily Traffic | 218 (2022) |
| Truck Traffic | 2% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 624 |
| Inspection Frequency | Every 24 months |
| Owner | County Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 000000052320312 |