Structure 34 0088 · San Francisco County, CA
Carries ST RTE 101 (5th ST over Bayshore Viaduct, 04-sf-101-4.12-sf.
Set by its lowest-rated component: Deck and Superstructure at 5 of 9.
How ratings work7,502 ft end to end, longest span 118 ft: about 21 football fields, or 1.4 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-101-4.12-sf |
| Carries | ST RTE 101 (5th ST |
| Crosses | Bayshore Viaduct |
| Coordinates | 37.76431, -122.40482 |
| Material | Steel |
| Design | Stringer/Multi-beam |
| Total Length | 7502.0 ft (2286.6 m) |
| Max Span | 118.1 ft (36 m) |
| Deck Width | 80.1 ft (24.4 m) |
| Deck Area | 55793.0 sq m |
| Main Spans | 8 |
| Year Built | 1955 |
| Avg Daily Traffic | 256,700 (2019) |
| Truck Traffic | 4% |
| Lanes On Bridge | 6 |
| Lanes Under Bridge | 51 |
| Last Inspection | May 2023 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Scour Critical | Not applicable |
| Structure Number | 34 0088 |
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.