Structure 55 0347H · Orange County, CA
Carries N&s605-n405 Conn over Service RD, 12-ora-605-r0.18-lalm.
Set by its lowest-rated component: Deck and Superstructure at 7 of 9.
How ratings work24 ft end to end. 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 or the layout of the shorter spans, so those are drawn as typical for a slab bridge.
| State | California |
| County | Orange |
| Location | 12-ora-605-r0.18-lalm |
| Carries | N&s605-n405 Conn |
| Crosses | Service RD |
| Coordinates | 33.78699, -118.09176 |
| Material | Concrete |
| Design | Slab |
| Total Length | 24.0 ft (7.3 m) |
| Max Span | 22.0 ft (6.7 m) |
| Deck Width | 44.9 ft (13.7 m) |
| Deck Area | 100.0 sq m |
| Main Spans | 1 |
| Year Built | 1966 |
| Avg Daily Traffic | 17,900 (2015) |
| Truck Traffic | 3% |
| Lanes On Bridge | 2 |
| Lanes Under Bridge | 1 |
| Last Inspection | September 2024 |
| Inspection Frequency | Every 48 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Scour Critical | Not applicable |
| Structure Number | 55 0347H |
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.