State Route 1 over Alder Creek
Good Condition79 years old1,800 vehicles/day
Location
| State | California |
| County | Mendocino |
| Location | 01-men-001-22.73 |
| Carries | State Route 1 |
| Crosses | Alder Creek |
| Coordinates | 38.99864, -123.68933 |
Condition Ratings
| Overall Condition | Good |
| Deck | 7 (Good) |
| Superstructure | 8 (Very Good) |
| Substructure | 7 (Good) |
| Channel/Waterway | 6 (Satisfactory) |
| Scour Critical | 5 — Stable for scour |
Physical Characteristics
| Material | Steel Continuous |
| Design | Stringer/Multi-beam |
| Total Length | 124.0 ft (37.8 m) |
| Max Span | 60.0 ft (18.3 m) |
| Deck Width | 32.8 ft (10 m) |
| Deck Area | 378 sq m |
| Main Spans | 2 |
| Year Built | 1947 |
Traffic
| Avg Daily Traffic | 1,800 (2009) |
| Truck Traffic | 12% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 824 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 10 0116 |