IRR County RD 306 over Grindstone Creek
Fair Condition76 years old396 vehicles/day
Location
| State | California |
| County | Glenn |
| Location | 23 Mi N Colusa Co Line |
| Carries | IRR County RD 306 |
| Crosses | Grindstone Creek |
| Coordinates | 39.67894, -122.53027 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 7 (Good) |
| Superstructure | 7 (Good) |
| Substructure | 5 (Fair) |
| Channel/Waterway | 7 (Good) |
| Scour Critical | 5 — Stable for scour |
Physical Characteristics
| Material | Concrete Continuous |
| Design | Tee Beam |
| Total Length | 154.9 ft (47.2 m) |
| Max Span | 49.9 ft (15.2 m) |
| Deck Width | 27.2 ft (8.3 m) |
| Deck Area | 391.8 sq m |
| Main Spans | 3 |
| Year Built | 1950 |
Traffic
| Avg Daily Traffic | 396 (2004) |
| Truck Traffic | 15% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 823 |
| Inspection Frequency | Every 24 months |
| Owner | County Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 11C0035 |