Structure 53 1643 · Los Angeles County, CA
Carries Interstate 710 over Laguna Channel, 07-la-710-26.12-monp.
A culvert 24 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 | Los Angeles |
| Location | 07-la-710-26.12-monp |
| Carries | Interstate 710 |
| Crosses | Laguna Channel |
| Coordinates | 34.05471, -118.16467 |
| Material | Concrete |
| Design | Culvert |
| Total Length | 24.0 ft (7.3 m) |
| Max Span | 14.1 ft (4.3 m) |
| Deck Area | 227.0 sq m |
| Main Spans | 2 |
| Year Built | 1961 (reconstructed 1973) |
| Avg Daily Traffic | 185,000 (2017) |
| Truck Traffic | 5% |
| Lanes On Bridge | 7 |
| Last Inspection | August 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 | 53 1643 |
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.