SILVER MOUNTAIN MINE
Superfund Site Profile
Announcements and Key Topics
About the cleanup
The cleanup was completed in 1992 and the Site deleted from the National Priorities List (NPL) in 1997. Measures implemented included:
- The heap leach pile and an on-site pond were treated to neutralize the cyanide;
- Mine tailings and heap leach piles were consolidated, covered, and seeded;
- Drums of hazardous materials were removed from the site;
- Mine entrance was blocked for safety and ...
The 5-acre Silver Mountain Mine site is located in Horse Springs Coulee, six miles northwest of Tonasket, Washington. It includes the area where a mine operated sporadically from 1928 to ...
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