US 21 over I-20
Fair Condition60 years old6,700 vehicles/day
Location
| State | South Carolina |
| County | Richland |
| Location | 5 Mi NE Of Columbia |
| Carries | US 21 |
| Crosses | I-20 |
| Coordinates | 34.07369, -81.99953 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 6 (Satisfactory) |
| Superstructure | 5 (Fair) |
| Substructure | 6 (Satisfactory) |
| Scour Critical | Not applicable |
Physical Characteristics
| Material | Prestressed Concrete |
| Design | Stringer/Multi-beam |
| Total Length | 274.9 ft (83.8 m) |
| Max Span | 69.9 ft (21.3 m) |
| Deck Width | 66.6 ft (20.3 m) |
| Deck Area | 1701.1 sq m |
| Main Spans | 4 |
| Year Built | 1966 |
Traffic
| Avg Daily Traffic | 6,700 (2023) |
| Truck Traffic | 3% |
| Lanes On Bridge | 4 |
| Lanes Under Bridge | 8 |
Inspection & Ownership
| Last Inspection | 124 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 000000000004881 |