Structure 29C0329 · San Joaquin County, CA
Carries Murphy Road over Drain Canal, 2.8 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 | 2.8 Mi S Of Mariposa RD |
| Carries | Murphy Road |
| Crosses | Drain Canal |
| Coordinates | 37.85080, -121.10866 |
| Material | Concrete Continuous |
| Design | Slab |
| Total Length | 22.6 ft (6.9 m) |
| Max Span | 10.8 ft (3.3 m) |
| Deck Width | 28.9 ft (8.8 m) |
| Deck Area | 60.7 sq m |
| Main Spans | 2 |
| Year Built | 1926 (reconstructed 1982) |
| Avg Daily Traffic | 520 (2013) |
| 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 | 8 — Stable, low risk |
| Structure Number | 29C0329 |
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.