Brown Mule Prospect

Past ProducerManganeseUndergroundUSGS MRDS

Location

StateWashington
CountyMason
Coordinates47.51449, -123.33316

Commodities

TertiaryManganese

Mine Details

StatusPast Producer
TypeUnderground
Discovery Year1916
Data SourceUSGS MRDS
Source ID10301934

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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