Modern Towns (13)
Amador City, California History
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Keystone Mine - Amador City California
Sign at site reads:
Founded in 1851 from many claims. One of the most profitable and longest running mines. Joining with South Spring Hill Mine working till 1942. East shaft worked till 1952. Reached a depth of 2680 feet. Employed 100 men and produced 24 million in gold.