Structure 20C0577 · Sonoma County, CA
Carries Natalie Drive over Windsor Creek, 200 Ft S Of Jessica Drive.
A culvert 25 ft across with 2 openings. 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, so those are drawn as typical for a culvert.
| State | California |
| County | Sonoma |
| Location | 200 Ft S Of Jessica Drive |
| Carries | Natalie Drive |
| Crosses | Windsor Creek |
| Coordinates | 38.55598, -122.81034 |
| Material | Concrete Continuous |
| Design | Culvert |
| Total Length | 24.9 ft (7.6 m) |
| Max Span | 12.5 ft (3.8 m) |
| Deck Width | 53.1 ft (16.2 m) |
| Deck Area | 123.1 sq m |
| Main Spans | 2 |
| Year Built | 1988 |
| Avg Daily Traffic | 3,000 (2013) |
| Truck Traffic | 3% |
| Lanes On Bridge | 2 |
| Last Inspection | July 2023 |
| Inspection Frequency | Every 48 months |
| Owner | Town/Township Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Scour Critical | 8 — Stable, low risk |
| Structure Number | 20C0577 |
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.