State Route 99 over Biggs Extension Canal
Fair Condition105 years old11,050 vehicles/day
Location
| State | California |
| County | Butte |
| Location | 03-but-099-9.21 |
| Carries | State Route 99 |
| Crosses | Biggs Extension Canal |
| Coordinates | 39.43700, -121.68818 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 7 (Good) |
| Superstructure | 7 (Good) |
| Substructure | 6 (Satisfactory) |
| Channel/Waterway | 6 (Satisfactory) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Concrete Continuous |
| Design | Tee Beam |
| Total Length | 36.4 ft (11.1 m) |
| Max Span | 17.1 ft (5.2 m) |
| Deck Width | 42.3 ft (12.9 m) |
| Deck Area | 143.2 sq m |
| Main Spans | 2 |
| Year Built | 1921 (reconstructed 1950) |
Traffic
| Avg Daily Traffic | 11,050 (2020) |
| Truck Traffic | 10% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 423 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 12 0004 |