ST Helena Road over Hillside
Fair Condition19 years old2,100 vehicles/day
Location
| State | California |
| County | Sonoma |
| Location | 4.3 Mi E/o Calistoga RD |
| Carries | ST Helena Road |
| Crosses | Hillside |
| Coordinates | 38.51819, -122.58697 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 7 (Good) |
| Superstructure | 6 (Satisfactory) |
| Substructure | 6 (Satisfactory) |
| Scour Critical | Not applicable |
Physical Characteristics
| Material | Steel |
| Design | Stringer/Multi-beam |
| Total Length | 29.9 ft (9.1 m) |
| Max Span | 28.5 ft (8.7 m) |
| Deck Width | 6.6 ft (2 m) |
| Deck Area | 18.2 sq m |
| Main Spans | 1 |
| Year Built | 2007 |
Traffic
| Avg Daily Traffic | 2,100 (2015) |
| Truck Traffic | 2% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | October 2024 |
| Inspection Frequency | Every 48 months |
| Owner | County Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 20C0547 |