Sd020 over Thunder Butte Ck
Good Condition43 years old408 vehicles/day
Location
| State | South Dakota |
| County | Perkins |
| Location | 7.7 W Of Bison |
| Carries | Sd020 |
| Crosses | Thunder Butte Ck |
| Coordinates | 45.53094, -102.61999 |
Condition Ratings
| Overall Condition | Good |
| Channel/Waterway | 8 (Very Good) |
| Culvert | 7 (Good) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Concrete Continuous |
| Design | Culvert |
| Total Length | 37.1 ft (11.3 m) |
| Max Span | 12.1 ft (3.7 m) |
| Deck Area | 79.1 sq m |
| Main Spans | 3 |
| Year Built | 1983 |
Traffic
| Avg Daily Traffic | 408 (2024) |
| Truck Traffic | 22% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 924 |
| Inspection Frequency | Every 48 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 000000053161290 |