US Highway 101 NB over Gannon Slough
Good Condition71 years old17,500 vehicles/day
Location
| State | California |
| County | Humboldt |
| Location | 01-hum-101-84.70-arc |
| Carries | US Highway 101 NB |
| Crosses | Gannon Slough |
| Coordinates | 40.84647, -124.08162 |
Condition Ratings
| Overall Condition | Good |
| Deck | 7 (Good) |
| Superstructure | 7 (Good) |
| Substructure | 7 (Good) |
| Channel/Waterway | 8 (Very Good) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Concrete Continuous |
| Design | Slab |
| Total Length | 76.4 ft (23.3 m) |
| Max Span | 21.0 ft (6.4 m) |
| Deck Width | 41.0 ft (12.5 m) |
| Deck Area | 291.2 sq m |
| Main Spans | 4 |
| Year Built | 1955 |
Traffic
| Avg Daily Traffic | 17,500 (2010) |
| Truck Traffic | 10% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | November 2023 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 04 0024R |