US 21 over I-77
Fair Condition51 years old25,600 vehicles/day
Location
| State | South Carolina |
| County | York |
| Location | 2.6 Mi S Of Rock Hill |
| Carries | US 21 |
| Crosses | I-77 |
| Coordinates | 34.91333, -80.98250 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 5 (Fair) |
| Superstructure | 6 (Satisfactory) |
| Substructure | 6 (Satisfactory) |
| Scour Critical | Not applicable |
Physical Characteristics
| Material | Steel |
| Design | Frame |
| Total Length | 270.0 ft (82.3 m) |
| Max Span | 89.9 ft (27.4 m) |
| Deck Width | 87.9 ft (26.8 m) |
| Deck Area | 2205.6 sq m |
| Main Spans | 4 |
| Year Built | 1975 |
Traffic
| Avg Daily Traffic | 25,600 (2023) |
| Truck Traffic | 8% |
| Lanes On Bridge | 5 |
| Lanes Under Bridge | 8 |
Inspection & Ownership
| Last Inspection | 324 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 000000000006816 |