Sd073 over Thunder Butte Ck
Good Condition21 years old423 vehicles/day
Location
| State | South Dakota |
| County | Perkins |
| Location | 4.7 S Jct Sd 20 E |
| Carries | Sd073 |
| Crosses | Thunder Butte Ck |
| Coordinates | 45.37658, -102.17351 |
Condition Ratings
| Overall Condition | Good |
| Deck | 7 (Good) |
| Superstructure | 8 (Very Good) |
| Substructure | 7 (Good) |
| Channel/Waterway | 8 (Very Good) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Prestressed Concrete Continuous |
| Design | Stringer/Multi-beam |
| Total Length | 128.9 ft (39.3 m) |
| Max Span | 59.7 ft (18.2 m) |
| Deck Width | 34.8 ft (10.6 m) |
| Deck Area | 416.6 sq m |
| Main Spans | 2 |
| Year Built | 2005 |
Traffic
| Avg Daily Traffic | 423 (2024) |
| Truck Traffic | 40% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 621 |
| Inspection Frequency | Every 48 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 000000053383397 |