257 ST over Cottonwood Ck
Fair Condition20 years old55 vehicles/day
Location
| State | South Dakota |
| County | Tripp |
| Location | 0.6w & 15.9n Witten |
| Carries | 257 ST |
| Crosses | Cottonwood Ck |
| Coordinates | 43.67370, -100.09656 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 6 (Satisfactory) |
| Superstructure | 8 (Very Good) |
| Substructure | 7 (Good) |
| Channel/Waterway | 6 (Satisfactory) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Prestressed Concrete |
| Design | Tee Beam |
| Total Length | 100.1 ft (30.5 m) |
| Max Span | 96.1 ft (29.3 m) |
| Deck Width | 32.5 ft (9.9 m) |
| Deck Area | 301.9 sq m |
| Main Spans | 1 |
| Year Built | 2006 |
Traffic
| Avg Daily Traffic | 55 (2022) |
| Truck Traffic | 9% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 623 |
| Inspection Frequency | Every 24 months |
| Owner | County Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 000000062072071 |