State Route 12 over Matanzas Creek
Fair Condition58 years old40,750 vehicles/day
Location
| State | California |
| County | Sonoma |
| Location | 04-son-012-t17.77-sro |
| Carries | State Route 12 |
| Crosses | Matanzas Creek |
| Coordinates | 38.43866, -122.68715 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 6 (Satisfactory) |
| Superstructure | 8 (Very Good) |
| Substructure | 7 (Good) |
| Channel/Waterway | 6 (Satisfactory) |
| Scour Critical | 5 — Stable for scour |
Physical Characteristics
| Material | Concrete |
| Design | Tee Beam |
| Total Length | 39.0 ft (11.9 m) |
| Max Span | 36.1 ft (11 m) |
| Deck Width | 75.8 ft (23.1 m) |
| Deck Area | 274.9 sq m |
| Main Spans | 1 |
| Year Built | 1968 |
Traffic
| Avg Daily Traffic | 40,750 (2009) |
| Truck Traffic | 2% |
| Lanes On Bridge | 5 |
Inspection & Ownership
| Last Inspection | 924 |
| Inspection Frequency | Every 48 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 20 0236 |