| Lat / long: | 39.67598, -120.71963 |
| Primary: | Iron |
| Operation type: | Unknown |
| Development status: | Prospect |
| MRDS | M024297 |
| MAS | 60910465 |
| DEP | 10262641 |
| Reference | {Deposit:: CALIF JOUR MINES & GLG V 38,#1 JAN1942,PP 48,49,65;}{Deposit:: POSSIBLE ERROR BETWEEN SIERRA IRONCO AN FOUR HILLS MINE AND}{Deposit:: ACTUALLY BELONGS TO THE TWO ADITS ADJACENT TO FOUR HILLS} |
| Reporter | Western Field Operations Center (WFOC) |