Understanding the proposed re-operation of Idaho-Maryland Mine

By The Sierra Fund

February 11, 2020

The Sierra Nevada foothills are geologically interesting and rich in minerals, including gold. Grass Valley is a historic hard rock gold mining town built on top of legacy, abandoned mines. Idaho-Maryland Mine was the second most productive hard rock gold mine in the Sierra Nevada. Between 1867 and 1957, the mine went through five periods of activity that extracted a total of 2.4 million ounces from the gold-bearing quartz veins located underneath Grass Valley.

Read the full article at The Sierra Fund here.

become a minewatcher

Join our newsletter for updates and

monthly meeting invitations.

Write us
  • Facebook

Join our Facebook group or

send questions directly to:



Your tax-deductible donation helps with research, community education, and legal fees. MineWatch sponsor, CEA Foundation, has hired the respected law firm, Shute, Mihaly, and Weinberger, to assist with this effort. 

Minewatch Nevada County is a community campaign sponsored by CEA Foundation and

supported by residents, businesses, and nonprofits in the Grass Valley and Nevada City CA areas.

See other CEA Foundation initiatives at: www.cea-nc.org

CEA Foundation © 2020