Middle Fork Property

Past ProducerCopperUndergroundUSGS MRDS

Location

StateWashington
CountyKing
Coordinates47.51152, -121.34980

Commodities

PrimaryCopper
SecondarySilver, Molybdenum, Gold

Mine Details

StatusPast Producer
TypeUnderground
Deposit TypePorphyry copper
Discovery Year1894
Data SourceUSGS MRDS
Source ID10131061

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.

Other Mines in King County

View all mines in King County →

Other Copper Mines in Washington

All copper mines in Washington →