Road M1 over Eel River
Poor Condition55 years old350 vehicles/day
Location
| State | California |
| County | Lake |
| Location | 13 Miles NE Potter Valley |
| Carries | Road M1 |
| Crosses | Eel River |
| Coordinates | 39.74274, -123.04480 |
Condition Ratings
| Overall Condition | Poor |
| Deck | 7 (Good) |
| Superstructure | 3 (Serious) |
| Substructure | 7 (Good) |
| Channel/Waterway | 7 (Good) |
| Scour Critical | 4 — Foundations need monitoring |
Physical Characteristics
| Material | Concrete |
| Design | Box Beam - Multiple |
| Total Length | 302.8 ft (92.3 m) |
| Max Span | 120.1 ft (36.6 m) |
| Deck Width | 31.8 ft (9.7 m) |
| Deck Area | 895.3 sq m |
| Main Spans | 1 |
| Year Built | 1971 |
Traffic
| Avg Daily Traffic | 350 (1992) |
| Truck Traffic | 3% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 823 |
| Inspection Frequency | Every 12 months |
| Owner | U.S. Forest Service |
| Historical Significance | Historical significance is not determined |
| Structure Number | 050854000001001 |