Structure 20 0037 · Sonoma County, CA
Carries State Route 128 over Header Draw, 04-son-128-5.26.
25 ft end to end, longest span 12 ft. Lengths are drawn to scale; at this length a semi-truck would be a speck. Each part is colored by its latest inspection rating. The inventory records lengths but not heights or the layout of the shorter spans, so those are drawn as typical for a slab bridge.
| State | California |
| County | Sonoma |
| Location | 04-son-128-5.26 |
| Carries | State Route 128 |
| Crosses | Header Draw |
| Coordinates | 38.71014, -122.89891 |
| Material | Concrete Continuous |
| Design | Slab |
| Total Length | 24.9 ft (7.6 m) |
| Max Span | 12.1 ft (3.7 m) |
| Deck Width | 26.6 ft (8.1 m) |
| Deck Area | 61.6 sq m |
| Main Spans | 2 |
| Year Built | 1900 |
| Avg Daily Traffic | 2,650 (2014) |
| Truck Traffic | 9% |
| Lanes On Bridge | 2 |
| Last Inspection | November 2024 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Scour Critical | 8 — Stable, low risk |
| Structure Number | 20 0037 |
Inspectors rate each major part of a bridge (the deck you drive on, the superstructure of beams that holds it up, and the substructure of piers and abutments beneath) on a 0–9 scale. A bridge's overall condition is its lowest of those ratings, so one deteriorated component makes the whole bridge "poor."
A poor rating is not a closure. It means the bridge is flagged for priority repair or replacement; bridges judged unsafe are closed or posted with weight limits. The waterway (channel) rating is reported, but it does not count toward the overall classification.