Structure 30C0042 · Calaveras County, CA
Carries Milton Road over Huntington Creek, 1.6 Mi NW Rock Ck RD Mltn.
A culvert 25 ft across with 2 openings. 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 | Calaveras |
| Location | 1.6 Mi NW Rock Ck RD Mltn |
| Carries | Milton Road |
| Crosses | Huntington Creek |
| Coordinates | 38.05405, -120.86458 |
| Material | Concrete Continuous |
| Design | Culvert |
| Total Length | 24.6 ft (7.5 m) |
| Max Span | 12.1 ft (3.7 m) |
| Deck Width | 34.1 ft (10.4 m) |
| Deck Area | 78 sq m |
| Main Spans | 2 |
| Year Built | 1967 |
| Avg Daily Traffic | 1,000 (2014) |
| Truck Traffic | 2% |
| Lanes On Bridge | 2 |
| Last Inspection | February 2025 |
| Inspection Frequency | Every 24 months |
| Owner | County Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Scour Critical | 5 — Stable for scour |
| Structure Number | 30C0042 |
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.