Manganese, Silica past producer · Lake County, California
| State | California |
| County | Lake |
| Coordinates | 39.14457, -122.98139 |
| Tertiary | Manganese, Silica |
| Status | Past Producer |
| Type | Surface |
| First Production | 1918 |
| Discovery Year | 1917 |
| Data Source | USGS MRDS |
| Source ID | 10212429 |
| Site | Distance | Commodity | Status |
|---|---|---|---|
| Phillips | 0.2 mi | Manganese | Producer |
| Poe | 2.0 mi | Copper | Unknown |
| Poe | 2.2 mi | Copper | Occurrence |
| Robinson Ranch Quarry | 3.0 mi | Stone, Crushed/Broken | Producer |
| Unnamed Location near Upper Lake, CA | 3.0 mi | Stone, Crushed/Broken | Occurrence |
| Rainbow Ledge Prospect | 3.1 mi | Prospect | |
| Middle Creek Pit and Mill | 3.1 mi | Sand and Gravel, Construction | Producer |
| Unknown near Upper Lake, CA | 3.2 mi | Stone, Crushed/Broken | Occurrence |
| Rainbow Ledge | 3.3 mi | Occurrence | |
| Witter Springs | 3.4 mi | Prospect | |
| Witter Springs Mine | 3.4 mi | Past Producer | |
| Middle Creek Facility | 3.8 mi | Sand, Industrial NEC | Abandoned |
This mine is a past producer — it was once operational but is no longer actively mining. Past producer sites may still have environmental impacts including disturbed land, tailings piles, and potential water quality effects. Some past producer sites have been reclaimed, while others remain as-is. Check with your state mining or environmental agency for current site conditions.