Big Ranch Road over Salvador Overflow
Fair Condition38 years old8,768 vehicles/day
Location
| State | California |
| County | Napa |
| Location | 0.3 Mi N Trancas ST |
| Carries | Big Ranch Road |
| Crosses | Salvador Overflow |
| Coordinates | 38.32819, -122.28974 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 7 (Good) |
| Superstructure | 7 (Good) |
| Substructure | 6 (Satisfactory) |
| Channel/Waterway | 8 (Very Good) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Prestressed Concrete |
| Design | Slab |
| Total Length | 69.9 ft (21.3 m) |
| Max Span | 69.9 ft (21.3 m) |
| Deck Width | 44.0 ft (13.4 m) |
| Deck Area | 285.4 sq m |
| Main Spans | 1 |
| Year Built | 1988 |
Traffic
| Avg Daily Traffic | 8,768 (2017) |
| 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 | 21C0050 |