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.

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