Route 57 over Tonner Canyon RD
Fair Condition55 years old210,000 vehicles/day
Location
| State | California |
| County | Orange |
| Location | 12-ora-057-21.78 |
| Carries | Route 57 |
| Crosses | Tonner Canyon RD |
| Coordinates | 33.93752, -117.87732 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 5 (Fair) |
| Superstructure | 7 (Good) |
| Substructure | 7 (Good) |
| Channel/Waterway | 8 (Very Good) |
| Scour Critical | 5 — Stable for scour |
Physical Characteristics
| Material | Concrete Continuous |
| Design | Box Beam - Multiple |
| Total Length | 487.9 ft (148.7 m) |
| Max Span | 121.1 ft (36.9 m) |
| Deck Width | 140.1 ft (42.7 m) |
| Deck Area | 6349.5 sq m |
| Main Spans | 5 |
| Year Built | 1971 |
Traffic
| Avg Daily Traffic | 210,000 (2020) |
| Truck Traffic | 10% |
| Lanes On Bridge | 10 |
| Lanes Under Bridge | 4 |
Inspection & Ownership
| Last Inspection | 624 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 55 0504 |