| Lat / long: | 39.79956, -123.3019 |
| Tertiary: | Manganese |
| Discovery year: | 1918 |
| Operation type: | Surface-Underground |
| Development status: | Past Producer |
| MRDS | M010069 |
| MAS | 60450012 |
| DEP | 10115813 |
| Reference | CALIF JOUR MINES AND GEOL V49 NO4 OCT 1953 P389 |
| Reporter | Western Field Operations Center (WFOC) |