Gridley Colusa HWY over Main Drainage Canal
Fair Condition92 years old715 vehicles/day
Location
| State | California |
| County | Butte |
| Location | 3.7 Mi E/o Colusa Co Line |
| Carries | Gridley Colusa HWY |
| Crosses | Main Drainage Canal |
| Coordinates | 39.36220, -121.82431 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 7 (Good) |
| Superstructure | 7 (Good) |
| Substructure | 5 (Fair) |
| Channel/Waterway | 8 (Very Good) |
| Scour Critical | 3 — Scour critical |
Physical Characteristics
| Material | Concrete Continuous |
| Design | Tee Beam |
| Total Length | 153.9 ft (46.9 m) |
| Max Span | 17.1 ft (5.2 m) |
| Deck Width | 30.2 ft (9.2 m) |
| Deck Area | 431.5 sq m |
| Main Spans | 9 |
| Year Built | 1934 (reconstructed 1949) |
Traffic
| Avg Daily Traffic | 715 (2019) |
| Truck Traffic | 19% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 325 |
| Inspection Frequency | Every 24 months |
| Owner | County Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 12C0013 |