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Unlike most mines, the Yankee Girl went nearly straight down to a depth of 1200 vertical feet. Eventually, three levels were developed. In places, silver ore assayed as high as $10,000 per ton making the Yankee Girl one of the richest concentrations of silver or in the United States. Ore from the mine was of such a high grade that it bypassed the concentration process and went directly to the smelter. As the mine descended into lower levers, “bailers” were installed to remove water from the mine. A decrease in the value of silver caused the Yankee Girl to close in 1898. During its years of production it produced nearly twelve million dollars in ore. The value of the ore in today’s market would be worth over one billion dollars.
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