Josephine Group

Past ProducerMercuryUndergroundUSGS MRDS

Location

StateCalifornia
CountySan Luis Obispo
Coordinates35.58886, -120.89348

Commodities

PrimaryMercury

Mine Details

StatusPast Producer
TypeUnderground
First Production1862
Discovery Year1862
Data SourceUSGS MRDS
Source ID10189808

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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