Structure 29C0323 · San Joaquin County, CA
Carries Murphy Road over Roadside Drain, 0.7 Mi S Of Mariposa RD.
Set by its lowest-rated component: Deck and Superstructure and Substructure at 7 of 9.
How ratings work23 ft end to end, longest span 11 ft. 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 Joaquin |
| Location | 0.7 Mi S Of Mariposa RD |
| Carries | Murphy Road |
| Crosses | Roadside Drain |
| Coordinates | 37.88439, -121.11017 |
| Material | Concrete Continuous |
| Design | Slab |
| Total Length | 23.0 ft (7 m) |
| Max Span | 10.8 ft (3.3 m) |
| Deck Width | 22.0 ft (6.7 m) |
| Deck Area | 46.9 sq m |
| Main Spans | 2 |
| Year Built | 1926 |
| Avg Daily Traffic | 520 (2017) |
| Truck Traffic | 5% |
| Lanes On Bridge | 2 |
| Last Inspection | January 2025 |
| Inspection Frequency | Every 24 months |
| Owner | County Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Scour Critical | 9 — Foundation above flood level |
| Structure Number | 29C0323 |
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.