Structure 53C1846 · Los Angeles County, CA
Carries Kanan Dume RD over Newton Cyn, 4.4mi N/o Sr-1 HWY.
A culvert 24 ft across with 4 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 | Los Angeles |
| Location | 4.4mi N/o Sr-1 HWY |
| Carries | Kanan Dume RD |
| Crosses | Newton Cyn |
| Coordinates | 34.07684, -118.81501 |
| Material | Steel |
| Design | Culvert |
| Total Length | 24.0 ft (7.3 m) |
| Max Span | 3.9 ft (1.2 m) |
| Deck Width | 45.9 ft (14 m) |
| Deck Area | 102.2 sq m |
| Main Spans | 4 |
| Year Built | 1960 |
| Avg Daily Traffic | 12,669 (2017) |
| Truck Traffic | 2% |
| Lanes On Bridge | 2 |
| Last Inspection | April 2023 |
| Inspection Frequency | Every 24 months |
| Owner | County Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Scour Critical | 8 — Stable, low risk |
| Structure Number | 53C1846 |
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.