Lone Rock Road over Grass Valley Canyon
Fair Condition66 years old168 vehicles/day
Location
| State | Oregon |
| County | Sherman |
| Location | 2.5 Mi SE Of HWY 97 |
| Carries | Lone Rock Road |
| Crosses | Grass Valley Canyon |
| Coordinates | 45.45526, -120.71213 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 7 (Good) |
| Superstructure | 6 (Satisfactory) |
| Substructure | 6 (Satisfactory) |
| Channel/Waterway | 6 (Satisfactory) |
| Scour Critical | 5 — Stable for scour |
Physical Characteristics
| Material | Concrete Continuous |
| Design | Tee Beam |
| Total Length | 113.8 ft (34.7 m) |
| Max Span | 44.0 ft (13.4 m) |
| Deck Width | 28.9 ft (8.8 m) |
| Deck Area | 305.4 sq m |
| Main Spans | 3 |
| Year Built | 1960 |
Traffic
| Avg Daily Traffic | 168 (2020) |
| Truck Traffic | 10% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 824 |
| Inspection Frequency | Every 24 months |
| Owner | County Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 558812003302050 |