20th Street over Route 280
Fair Condition58 years old2,700 vehicles/day
Location
| State | California |
| County | San Francisco |
| Location | 04-sf-280-r6.39-sf |
| Carries | 20th Street |
| Crosses | Route 280 |
| Coordinates | 37.76020, -122.39281 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 5 (Fair) |
| Superstructure | 7 (Good) |
| Substructure | 5 (Fair) |
| Scour Critical | Not applicable |
Physical Characteristics
| Material | Concrete Continuous |
| Design | Box Beam - Multiple |
| Total Length | 794.6 ft (242.2 m) |
| Max Span | 89.9 ft (27.4 m) |
| Deck Width | 38.1 ft (11.6 m) |
| Deck Area | 2809.5 sq m |
| Main Spans | 10 |
| Year Built | 1968 |
Traffic
| Avg Daily Traffic | 2,700 (2018) |
| Truck Traffic | 1% |
| Lanes On Bridge | 2 |
| Lanes Under Bridge | 15 |
Inspection & Ownership
| Last Inspection | 424 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 34 0098 |