Public domain
Anaconda smelter, Montana. Anaconda Copper Mining Company. Improvements in concentration and smelting processes enable the Anaconda Copper Mining Company to profitably refine their tailings from operations conducted some twenty years ago. Standard cars are loaded with tailings and shipped to the sme
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Credit lineAnaconda smelter, Montana. Anaconda Copper Mining Company. Improvements in concentration and smelting processes enable the Anaconda Copper Mining Company to profitably refine their tailings from opera. 1942-01-01. Lee, Russell. Farm Security Administration/Office of War Information Collection, Library of Congress. Public domain.