| Lat / long: | 37.39272, -121.43912 |
| Tertiary: | Manganese, Silica |
| Other material: | Chert, Psilomelane, Pyrolusite, Quartz |
| Discovery year: | 1940 |
| Operation type: | Surface-Underground |
| Development status: | Past Producer |
| First production started: | 1941 |
| MAS | 60850029 |
| DEP | 10116720 |
| Reference | {Deposit:: CDMG,BULL.152,1950 (TRASK,ET.AL.)}{Deposit:: TRENGROVE,RR.,1960,USBM.R.I.5579,}{Deposit:: VOLIN,TRENGROVE,MATSON,1956,USBM R.I.5254.} |
| Reporter | Deino, Al |