River RD over Mark West CR Trenton RD
Fair Condition66 years old11,700 vehicles/day
Location
| State | California |
| County | Sonoma |
| Location | 4.8 Mi West Of US 101 |
| Carries | River RD |
| Crosses | Mark West CR Trenton RD |
| Coordinates | 38.48455, -122.84262 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 5 (Fair) |
| Superstructure | 8 (Very Good) |
| Substructure | 8 (Very Good) |
| Channel/Waterway | 8 (Very Good) |
| Scour Critical | 5 — Stable for scour |
Physical Characteristics
| Material | Concrete Continuous |
| Design | Tee Beam |
| Total Length | 498.4 ft (151.9 m) |
| Max Span | 51.8 ft (15.8 m) |
| Deck Width | 32.5 ft (9.9 m) |
| Deck Area | 1503.8 sq m |
| Main Spans | 10 |
| Year Built | 1960 |
Traffic
| Avg Daily Traffic | 11,700 (2015) |
| Truck Traffic | 3% |
| Lanes On Bridge | 2 |
| Lanes Under 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 | 20C0064 |