Structure 34 0077 · San Francisco County, CA
Carries U.s. Highway 101 over I-80 & US 101 Ramps Strs, 04-sf-101-r4.25l-sf.
10,055 ft end to end, longest span 106 ft: about 28 football fields, or 1.9 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-r4.25l-sf |
| Carries | U.s. Highway 101 |
| Crosses | I-80 & US 101 Ramps Strs |
| Coordinates | 37.76989, -122.41848 |
| Material | Steel |
| Design | Stringer/Multi-beam |
| Total Length | 10054.8 ft (3064.7 m) |
| Max Span | 105.6 ft (32.2 m) |
| Deck Width | 80.1 ft (24.4 m) |
| Deck Area | 74778.7 sq m |
| Main Spans | 103 |
| Year Built | 1955 |
| Avg Daily Traffic | 59,000 (2019) |
| Truck Traffic | 1% |
| Lanes On Bridge | 4 |
| Lanes Under Bridge | 72 |
| Last Inspection | April 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 0077 |
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.