Sir Fran Drake Blv over State Route 580
Good Condition69 years old51,000 vehicles/day
Location
| State | California |
| County | Marin |
| Location | 04-mrn-580-3.29-srf |
| Carries | Sir Fran Drake Blv |
| Crosses | State Route 580 |
| Coordinates | 37.94651, -122.49184 |
Condition Ratings
| Overall Condition | Good |
| Deck | 7 (Good) |
| Superstructure | 7 (Good) |
| Substructure | 7 (Good) |
| Scour Critical | Not applicable |
Physical Characteristics
| Material | Concrete Continuous |
| Design | Box Beam - Multiple |
| Total Length | 672.2 ft (204.9 m) |
| Max Span | 105.0 ft (32 m) |
| Deck Width | 33.5 ft (10.2 m) |
| Deck Area | 2090.0 sq m |
| Main Spans | 4 |
| Year Built | 1957 |
Traffic
| Avg Daily Traffic | 51,000 (2021) |
| Truck Traffic | 4% |
| Lanes On Bridge | 1 |
| Lanes Under Bridge | 4 |
Inspection & Ownership
| Last Inspection | 524 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 27 0074 |