State Route 29 over Sulphur Creek
Fair Condition116 years old24,000 vehicles/day
Location
| State | California |
| County | Napa |
| Location | 04-nap-029-28.43-shla |
| Carries | State Route 29 |
| Crosses | Sulphur Creek |
| Coordinates | 38.50266, -122.46586 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 7 (Good) |
| Superstructure | 6 (Satisfactory) |
| Substructure | 7 (Good) |
| Channel/Waterway | 7 (Good) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Masonry |
| Design | Arch - Thru |
| Total Length | 65.9 ft (20.1 m) |
| Max Span | 59.1 ft (18 m) |
| Deck Width | 49.9 ft (15.2 m) |
| Deck Area | 305.5 sq m |
| Main Spans | 1 |
| Year Built | 1910 (reconstructed 1975) |
Traffic
| Avg Daily Traffic | 24,000 (2017) |
| Truck Traffic | 7% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 423 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 21 0016 |