State Route 299 over Mill Creek
Good Condition61 years old9,700 vehicles/day
Location
| State | California |
| County | Humboldt |
| Location | 01-hum-299-r4.21 |
| Carries | State Route 299 |
| Crosses | Mill Creek |
| Coordinates | 40.89676, -124.01835 |
Condition Ratings
| Overall Condition | Good |
| Deck | 7 (Good) |
| Superstructure | 7 (Good) |
| Substructure | 7 (Good) |
| Channel/Waterway | 8 (Very Good) |
| Scour Critical | 5 — Stable for scour |
Physical Characteristics
| Material | Concrete Continuous |
| Design | Slab |
| Total Length | 116.1 ft (35.4 m) |
| Max Span | 33.1 ft (10.1 m) |
| Deck Width | 94.2 ft (28.7 m) |
| Deck Area | 1016.0 sq m |
| Main Spans | 4 |
| Year Built | 1965 |
Traffic
| Avg Daily Traffic | 9,700 (2009) |
| Truck Traffic | 17% |
| Lanes On Bridge | 4 |
Inspection & Ownership
| Last Inspection | 125 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 04 0188 |