| Lat / long: | 40.20675, -123.27551 |
| Tertiary: | Manganese, Silica |
| Other material: | Chert, Pyrolusite, Quartz, Rhodochrosite, Rhodonite |
| Discovery year: | 1942 |
| Operation type: | Underground |
| Development status: | Past Producer |
| First production started: | 1944 |
| MRDS | M020320 |
| MAS | 61050030 |
| DEP | 10263508 |
| Reference | {Deposit:: CAL.DIV.MINES AND GEOLOGY,BULL.152,1950}{Deposit:: CDMG,MINES AND MINERAL RESOURCES OF TRINITY CO,COUNTY REPT.4} |
| Reporter | Deino, Al |