Horse Heaven Mine

Past ProducerMercuryUndergroundUSGS MRDS

Location

StateOregon
CountyJefferson
Coordinates44.71457, -120.50808

Commodities

PrimaryMercury
TertiaryArsenic, Antimony

Mine Details

StatusPast Producer
TypeUnderground
First Production1934
Discovery Year1933
Data SourceUSGS MRDS
Source ID10103898

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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