| Lat / long: | 37.49632, -121.34852 |
| Tertiary: | Manganese, Silica |
| Other material: | Chert, Pyrolusite |
| Operation type: | Surface-Underground |
| Development status: | Past Producer |
| First production started: | 1918 |
| MRDS | M020258 |
| MAS | 60990001 |
| DEP | 10190395 |
| Reference | CAL DIV.MINES AND GEOL.,BULL.152,1950 |
| Reporter | Deino, Al |