18th Street over Route 280
Poor Condition58 years old7,000 vehicles/day
Location
| State | California |
| County | San Francisco |
| Location | 04-sf-280-r6.57-sf |
| Carries | 18th Street |
| Crosses | Route 280 |
| Coordinates | 37.76273, -122.39303 |
Condition Ratings
| Overall Condition | Poor |
| Deck | 4 (Poor) |
| Superstructure | 7 (Good) |
| Substructure | 7 (Good) |
| Scour Critical | Not applicable |
Physical Characteristics
| Material | Concrete Continuous |
| Design | Box Beam - Multiple |
| Total Length | 552.8 ft (168.5 m) |
| Max Span | 79.7 ft (24.3 m) |
| Deck Width | 64.0 ft (19.5 m) |
| Deck Area | 3285.8 sq m |
| Main Spans | 9 |
| Year Built | 1968 |
Traffic
| Avg Daily Traffic | 7,000 (2018) |
| Truck Traffic | 2% |
| Lanes On Bridge | 4 |
| Lanes Under Bridge | 14 |
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 0099 |