San Mateo County, California — Mines
11 mines | 530 violations
| Mine | Type | Status | Violations | Penalties |
|---|---|---|---|---|
| PILARCITOS QUARRY | Surface | Abandoned | 220 | $252K |
| Guadalupe | Surface | Intermittent | 193 | $50K |
| Langley Hill Quarry | Surface | Active | 84 | $10K |
| Harbor Plant | Surface | Abandoned | 33 | $5K |