Armstrong No. 2 Mine
Past ProducerCalcium, Copper, Iron, Manganese, SilicaSurface-UndergroundUSGS MRDS
Location
| State | California |
| County | Trinity |
| Coordinates | 40.18845, -123.30501 |
Commodities
| Tertiary | Calcium, Copper, Iron, Manganese, Silica |
Mine Details
| Status | Past Producer |
| Type | Surface-Underground |
| First Production | 1954 |
| Discovery Year | 1941 |
| Data Source | USGS MRDS |
| Source ID | 10216144 |
What This Means
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.
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