Silverado Trail over Simmons Canyon Creek
Fair Condition48 years old1,170 vehicles/day
Location
| State | California |
| County | Napa |
| Location | 0.35 Mi NW Dunaweal Lane |
| Carries | Silverado Trail |
| Crosses | Simmons Canyon Creek |
| Coordinates | 38.57992, -122.55721 |
Condition Ratings
| Overall Condition | Fair |
| Channel/Waterway | 7 (Good) |
| Culvert | 6 (Satisfactory) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Concrete Continuous |
| Design | Culvert |
| Total Length | 29.9 ft (9.1 m) |
| Max Span | 14.1 ft (4.3 m) |
| Deck Width | 40.7 ft (12.4 m) |
| Deck Area | 112.8 sq m |
| Main Spans | 2 |
| Year Built | 1978 |
Traffic
| Avg Daily Traffic | 1,170 (2012) |
| Truck Traffic | 10% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 524 |
| Inspection Frequency | Every 48 months |
| Owner | County Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 21C0031 |