State Route 221 over Basalt Road
Good Condition82 years old24,500 vehicles/day
Location
| State | California |
| County | Napa |
| Location | 04-nap-221-1.50-nap |
| Carries | State Route 221 |
| Crosses | Basalt Road |
| Coordinates | 38.26309, -122.27074 |
Condition Ratings
| Overall Condition | Good |
| Deck | 7 (Good) |
| Superstructure | 7 (Good) |
| Substructure | 7 (Good) |
| Scour Critical | Not applicable |
Physical Characteristics
| Material | Concrete |
| Design | Slab |
| Total Length | 34.8 ft (10.6 m) |
| Max Span | 31.5 ft (9.6 m) |
| Deck Width | 91.9 ft (28 m) |
| Deck Area | 296.8 sq m |
| Main Spans | 1 |
| Year Built | 1944 |
Traffic
| Avg Daily Traffic | 24,500 (2009) |
| Truck Traffic | 5% |
| Lanes On Bridge | 4 |
| Lanes Under Bridge | 2 |
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 | 21 0039 |