Calistoga RD over Mark West Creek
Fair Condition59 years old5,800 vehicles/day
Location
| State | California |
| County | Sonoma |
| Location | 4.2 Mi N Intersectn SR 12 |
| Carries | Calistoga RD |
| Crosses | Mark West Creek |
| Coordinates | 38.51557, -122.65486 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 5 (Fair) |
| Superstructure | 5 (Fair) |
| Substructure | 6 (Satisfactory) |
| Channel/Waterway | 6 (Satisfactory) |
| Scour Critical | 5 — Stable for scour |
Physical Characteristics
| Material | Concrete Continuous |
| Design | Slab |
| Total Length | 146.7 ft (44.7 m) |
| Max Span | 41.0 ft (12.5 m) |
| Deck Width | 40.7 ft (12.4 m) |
| Deck Area | 554.3 sq m |
| Main Spans | 4 |
| Year Built | 1967 |
Traffic
| Avg Daily Traffic | 5,800 (2015) |
| Truck Traffic | 5% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | October 2024 |
| Inspection Frequency | Every 24 months |
| Owner | County Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 20C0122 |