| Lat / long: | 39.14457, -122.98139 |
| Tertiary: | Manganese, Silica |
| Other material: | Chert, Psilomelane, Pyrolusite |
| Discovery year: | 1917 |
| Operation type: | Surface |
| Development status: | Past Producer |
| First production started: | 1918 |
| MRDS | M009035 |
| MAS | 60330024 |
| DEP | 10212429 |
| Reference | {Deposit:: CDMG BULL 152,1950}{Deposit:: USGS FILE OF 1918}{Deposit:: USBM.R.I. 5579,1960} |
| Reporter | Deino, Al |