Johe Ranch Mine
Past ProducerSurface-UndergroundUSGS MRDS
Location
| State | California |
| County | San Luis Obispo |
| Coordinates | 35.26577, -120.76427 |
Commodities
| Tertiary | Manganese, Silica |
Mine Details
| Status | Past Producer |
| Type | Surface-Underground |
| First Production | 1917 |
| Discovery Year | 1916 |
| Data Source | USGS MRDS |
| Source ID | 10213583 |