| Lat / long: | 37.52822, -121.39382 |
| Tertiary: | Manganese, Silica |
| Other material: | Chert, Psilomelane, Quartz, Rhodochrosite, Rhodonite |
| Discovery year: | 1916 |
| Operation type: | Underground |
| Development status: | Past Producer |
| First production started: | 1918 |
| MRDS | W017797 |
| MAS | 60990002 |
| DEP | 10262875 |
| Reference | {Deposit:: USBM.RI4560,1949}{Deposit:: CDMG BULL.152,1950}{Deposit:: CDMG BULL.125,1943} |
| Reporter | Burnett |