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| There are 357 miles of shafts and drifts. |
In 1850, George Roberts discovered an outcropping of quartz which led to a vein of gold called the Ophir Vein. In l850, the Empire Mine in Grass Valley was opened at the site of the Ophir Vein. Cornish miners dug 367 miles of tunnels -- some of which angled downward into the earth some 11,000 feet, nearly a full vertical mile below the surface.
The Presenter:
Charles Steinfeld, Docent, Empire Mine State Historic Park
Click to listen to a short
review.
