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In 1958, Duval Corporation bought the town for back taxes and began building a modem copper-moly mine. From 1961, when they started production, to the close of the mine in 1982, Mineral Park produced 323,000 tons of copper, 25,000 tons of molybdenum, or moly for short, and 5,000,000 ounces of silver.

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Total recorded production for the Hendricks mine is 23,594 tons of ore, which yielded 5,299 ounces of gold, 4,979 ounces of silver, 296 pounds of copper and 251 pounds of lead (Geach 1972; Brown 1983). The mill, still standing on the site, is a wood frame, tar paper-covered building.

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