Browse TRAIL Inventories

Investigation of Twin Buttes copper mines, Pima County, Ariz.

Copper Giant deposits, Pima County, Ariz.

Mining methods and practices at the Mineral Hill Copper Mine, Banner Mining Co., Pima County, Ariz.

Discovery and development of the Pima copper deposit, Pima Mining Co., Pima County, Ariz.

Open-pit copper mining methods at New Cornelia Branch, Phelps Dodge Corp., Pima County, Ariz.

Open-pit copper mining and concentrating methods and costs, Silver Bell Unit, American Smelting and Refining Co., Pima County, Ariz.


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