State Route 255 over Mcdaniel Slough
Fair Condition63 years old4,160 vehicles/day
Location
| State | California |
| County | Humboldt |
| Location | 01-hum-255-7.77 |
| Carries | State Route 255 |
| Crosses | Mcdaniel Slough |
| Coordinates | 40.86786, -124.10212 |
Condition Ratings
| Overall Condition | Fair |
| Channel/Waterway | 8 (Very Good) |
| Culvert | 6 (Satisfactory) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Concrete Continuous |
| Design | Culvert |
| Total Length | 22.0 ft (6.7 m) |
| Max Span | 9.8 ft (3 m) |
| Deck Width | 86.0 ft (26.2 m) |
| Deck Area | 175.5 sq m |
| Main Spans | 2 |
| Year Built | 1963 |
Traffic
| Avg Daily Traffic | 4,160 (2010) |
| Truck Traffic | 8% |
| Lanes On Bridge | 4 |
Inspection & Ownership
| Last Inspection | November 2023 |
| Inspection Frequency | Every 48 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 04 0222 |