Triangle

Past ProducerCopperSurface-UndergroundUSGS MRDS

Location

StateMontana
CountyMissoula
Coordinates46.79069, -113.66904

Commodities

PrimaryCopper
TertiarySilver, Gold

Mine Details

StatusPast Producer
TypeSurface-Underground
Data SourceUSGS MRDS
Source ID10270185

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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