Structure 53C0340 · Los Angeles County, CA
Carries Firestone BLVD over Silverbow Storm Drn, 0.5mi Se/o San Antonio DR.
A culvert 25 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 | 0.5mi Se/o San Antonio DR |
| Carries | Firestone BLVD |
| Crosses | Silverbow Storm Drn |
| Coordinates | 33.90577, -118.06914 |
| Material | Concrete |
| Design | Culvert |
| Total Length | 24.9 ft (7.6 m) |
| Max Span | 5.9 ft (1.8 m) |
| Deck Width | 90.9 ft (27.7 m) |
| Deck Area | 210.5 sq m |
| Main Spans | 4 |
| Year Built | 1934 (reconstructed 1950) |
| Avg Daily Traffic | 26,842 (2015) |
| Truck Traffic | 1% |
| Lanes On Bridge | 5 |
| Last Inspection | January 2025 |
| Inspection Frequency | Every 48 months |
| Owner | City/Municipal Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Scour Critical | 8 — Stable, low risk |
| Structure Number | 53C0340 |
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.