State Route 12 over Tylers Drainage
Good Condition76 years old21,000 vehicles/day
Location
| State | California |
| County | Sonoma |
| Location | 04-son-012-23.00 |
| Carries | State Route 12 |
| Crosses | Tylers Drainage |
| Coordinates | 38.44607, -122.60689 |
Condition Ratings
| Overall Condition | Good |
| Channel/Waterway | 8 (Very Good) |
| Culvert | 7 (Good) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Concrete Continuous |
| Design | Culvert |
| Total Length | 31.5 ft (9.6 m) |
| Max Span | 11.5 ft (3.5 m) |
| Deck Width | 42.0 ft (12.8 m) |
| Deck Area | 122.9 sq m |
| Main Spans | 3 |
| Year Built | 1950 |
Traffic
| Avg Daily Traffic | 21,000 (2016) |
| Truck Traffic | 6% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 922 |
| Inspection Frequency | Every 48 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 20 0282 |