Structure 21C0066 · Napa County, CA
Carries Myrtledale RD over Napa River, 0.2 Mi SE Tubbs Lane.
24 ft end to end. 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 deck arch.
| State | California |
| County | Napa |
| Location | 0.2 Mi SE Tubbs Lane |
| Carries | Myrtledale RD |
| Crosses | Napa River |
| Coordinates | 38.59416, -122.59741 |
| Material | Concrete |
| Design | Arch - Deck |
| Total Length | 24.0 ft (7.3 m) |
| Max Span | 20.0 ft (6.1 m) |
| Deck Width | 43.6 ft (13.3 m) |
| Deck Area | 97.1 sq m |
| Main Spans | 1 |
| Year Built | 1930 (reconstructed 1950) |
| Avg Daily Traffic | 671 (2012) |
| Truck Traffic | 10% |
| Lanes On Bridge | 2 |
| Last Inspection | May 2024 |
| Inspection Frequency | Every 24 months |
| Owner | County Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Scour Critical | 5 — Stable for scour |
| Structure Number | 21C0066 |
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.