Mattole RD over Harper Creek
Fair Condition49 years old600 vehicles/day
Location
| State | California |
| County | Humboldt |
| Location | 4.3 Mi W/o HWY 101 |
| Carries | Mattole RD |
| Crosses | Harper Creek |
| Coordinates | 40.35120, -123.98812 |
Condition Ratings
| Overall Condition | Fair |
| Channel/Waterway | 7 (Good) |
| Culvert | 6 (Satisfactory) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Concrete Continuous |
| Design | Culvert |
| Total Length | 20.7 ft (6.3 m) |
| Max Span | 11.2 ft (3.4 m) |
| Deck Width | 22.0 ft (6.7 m) |
| Deck Area | 42.2 sq m |
| Main Spans | 2 |
| Year Built | 1977 |
Traffic
| Avg Daily Traffic | 600 (2009) |
| Truck Traffic | 10% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 322 |
| Inspection Frequency | Every 48 months |
| Owner | State Park/Forest Agency |
| Historical Significance | Historical significance is not determined |
| Structure Number | 04P0007 |