State Route 128 over Hopper Slough
Poor Condition105 years old2,075 vehicles/day
Location
| State | California |
| County | Napa |
| Location | 04-nap-128-5.12 |
| Carries | State Route 128 |
| Crosses | Hopper Slough |
| Coordinates | 38.46364, -122.41438 |
Condition Ratings
| Overall Condition | Poor |
| Deck | 6 (Satisfactory) |
| Superstructure | 6 (Satisfactory) |
| Substructure | 3 (Serious) |
| Channel/Waterway | 6 (Satisfactory) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Concrete |
| Design | Girder and Floorbeam |
| Total Length | 41.0 ft (12.5 m) |
| Max Span | 39.0 ft (11.9 m) |
| Deck Width | 22.6 ft (6.9 m) |
| Deck Area | 86.2 sq m |
| Main Spans | 1 |
| Year Built | 1921 |
Traffic
| Avg Daily Traffic | 2,075 (2009) |
| Truck Traffic | 5% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 424 |
| Inspection Frequency | Every 12 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 21 0019 |