Manganese past producer · Lake County, California
| State | California |
| County | Lake |
| Coordinates | 39.19347, -122.99419 |
| Tertiary | Manganese |
| Status | Past Producer |
| Type | Surface |
| Discovery Year | 1918 |
| Data Source | USGS MRDS |
| Source ID | 10188053 |
| Site | Distance | Commodity | Status |
|---|---|---|---|
| Witter Springs | 0.1 mi | Prospect | |
| Robinson Ranch Quarry | 0.8 mi | Stone, Crushed/Broken | Producer |
| Phillips | 3.4 mi | Past Producer | |
| Phillips | 3.5 mi | Manganese | Producer |
| Rattlesnake Ukiah | 3.7 mi | Manganese | Past Producer |
| Unknown near Upper Lake, CA | 3.7 mi | Stone, Crushed/Broken | Occurrence |
| Middle Creek Terrace | 3.7 mi | Sand and Gravel, Construction | Producer |
| Rattlesnake | 3.8 mi | Iron | Occurrence |
| Unnamed Location near Upper Lake, CA | 4.0 mi | Stone, Crushed/Broken | Occurrence |
| Middle Creek Bar | 4.3 mi | Sand and Gravel, Construction | Producer |
| Potter Valley Quarry | 4.4 mi | Stone, Crushed/Broken | Producer |
| Middle Creek Pit and Mill | 4.5 mi | Sand and Gravel, Construction | Producer |
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.