Interstate 8 over Knob Wash
Good Condition56 years old15,100 vehicles/day
Location
| State | California |
| County | Imperial |
| Location | 11-imp-008-r89.90 |
| Carries | Interstate 8 |
| Crosses | Knob Wash |
| Coordinates | 32.74544, -114.73429 |
Condition Ratings
| Overall Condition | Good |
| Channel/Waterway | 7 (Good) |
| Culvert | 7 (Good) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Concrete Continuous |
| Design | Culvert |
| Total Length | 36.1 ft (11 m) |
| Max Span | 9.8 ft (3 m) |
| Deck Width | 121.4 ft (37 m) |
| Deck Area | 407 sq m |
| Main Spans | 3 |
| Year Built | 1970 |
Traffic
| Avg Daily Traffic | 15,100 (2022) |
| Truck Traffic | 20% |
| Lanes On Bridge | 4 |
Inspection & Ownership
| Last Inspection | 125 |
| Inspection Frequency | Every 48 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 58 0108 |