Structure 34 0100 · San Francisco County, CA
Carries Interstate 280 over China Basin Viaduct, 04-sf-280-r6.61-sf.
11,001 ft end to end, longest span 167 ft: about 31 football fields, or 2.1 miles. Lengths are drawn to scale; at this length a semi-truck would be a speck. Each part is colored by its latest inspection rating. The inventory records lengths but not heights or the layout of the shorter spans, so those are drawn as typical for a multi-beam bridge.
| State | California |
| County | San Francisco |
| Location | 04-sf-280-r6.61-sf |
| Carries | Interstate 280 |
| Crosses | China Basin Viaduct |
| Coordinates | 37.76423, -122.39267 |
| Material | Prestressed Concrete |
| Design | Stringer/Multi-beam |
| Total Length | 11000.7 ft (3,353 m) |
| Max Span | 167.0 ft (50.9 m) |
| Deck Width | 135.5 ft (41.3 m) |
| Deck Area | 138478.9 sq m |
| Main Spans | 30 |
| Year Built | 1971 |
| Avg Daily Traffic | 68,200 (2019) |
| Truck Traffic | 3% |
| Lanes On Bridge | 8 |
| Lanes Under Bridge | 12 |
| Last Inspection | May 2024 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Scour Critical | 8 — Stable, low risk |
| Structure Number | 34 0100 |
Inspectors rate each major part of a bridge (the deck you drive on, the superstructure of beams that holds it up, and the substructure of piers and abutments beneath) on a 0–9 scale. A bridge's overall condition is its lowest of those ratings, so one deteriorated component makes the whole bridge "poor."
A poor rating is not a closure. It means the bridge is flagged for priority repair or replacement; bridges judged unsafe are closed or posted with weight limits. The waterway (channel) rating is reported, but it does not count toward the overall classification.