Clark Manganese Deposit

Past ProducerManganeseUndergroundUSGS MRDS

Location

StateMichigan
CountyKeweenaw
Coordinates47.45690, -87.86503

Commodities

TertiaryManganese

Mine Details

StatusPast Producer
TypeUnderground
First Production1881
Discovery Year1881
Data SourceUSGS MRDS
Source ID10194276

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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