This Bureau of Mines report is an inventory of the amount and type of mill tailings created from the lode-mine commodities (copper, lead, zinc, gold, and silver) on a state and county basis between the years 1911 and 1981. The report contains tables and base maps cataloging the amounts of tailings created in each county on a decade basis. Mine waste and mill tailings disposal practices and technological advances and changes in the milling are discussed. Also included is a discussion of the material content typical to tailings produced from these five commodities.
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