| Lat / long: | 38.441, -120.59911 |
| Tertiary: | Manganese, Silica |
| Operation type: | Surface-Underground |
| Development status: | Past Producer |
| First production started: | 1917 |
| MRDS | M005227 |
| MAS | 60050012 |
| DEP | 10138401 |
| Reference | {Deposit:: TRASK-GEO DESCRIPT MN DEPS OF CAL-CAL DIV OF MINES BUL.152-A}{Deposit:: TRENGOVE-RECON OF CAL MN DEPS-USBM R.I.5579-1960}{Deposit:: ROOT-23RD RPT OF STATE MIN-MININGIN CA-CA ST MIN BUR-VOL 23-} |
| Reporter | Niemi |