Structure 57 0161 · San Diego County, CA
Carries State Route 78 over Ballena Creek, 11-sd-078-45.01.
Set by its lowest-rated component: Deck and Superstructure and Substructure at 7 of 9.
How ratings work22 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 | San Diego |
| Location | 11-sd-078-45.01 |
| Carries | State Route 78 |
| Crosses | Ballena Creek |
| Coordinates | 33.06539, -116.74971 |
| Material | Concrete |
| Design | Slab |
| Total Length | 22.0 ft (6.7 m) |
| Max Span | 19.0 ft (5.8 m) |
| Deck Width | 43.3 ft (13.2 m) |
| Deck Area | 88.4 sq m |
| Main Spans | 1 |
| Year Built | 1922 (reconstructed 1990) |
| Avg Daily Traffic | 6,500 (2014) |
| Truck Traffic | 6% |
| Lanes On Bridge | 2 |
| Last Inspection | May 2023 |
| 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 | 57 0161 |
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.