Structure 53C0937 · Los Angeles County, CA
Carries Lycoming ST over Diamond Bar Crk, 200ft E/o Brea Cyn RD.
A culvert 24 ft across. 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 | 200ft E/o Brea Cyn RD |
| Carries | Lycoming ST |
| Crosses | Diamond Bar Crk |
| Coordinates | 34.00283, -117.84571 |
| Material | Concrete |
| Design | Culvert |
| Total Length | 24.0 ft (7.3 m) |
| Max Span | 18.0 ft (5.5 m) |
| Deck Width | 53.5 ft (16.3 m) |
| Deck Area | 119.0 sq m |
| Main Spans | 1 |
| Year Built | 1987 |
| Avg Daily Traffic | 10,666 (2012) |
| Truck Traffic | 2% |
| Lanes On Bridge | 2 |
| Last Inspection | September 2021 |
| 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 | 53C0937 |
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.