Explanation of how the Index is Developed The PBCo Mining Equipment Index is a measure of the quarterly evolution of surface mining equipment shipments worldwide. It relies on data from Parker Bay's Mobile Mining Equipment Database and encompasses the same product range covered by the Database*.
History of Copper Mining in Green Valley area. first mining area in what is now the "copper mining district" southwest of Tucson. After 1900, the mining continued on sporadic basis as heavier equipment was in Duval in 1968, then sold its copper properties to Cyrus Minerals in 1986.
Electric Materials manufactures high-quality electrical commutators, AC rotors, copper extrusions, forgings, and castings. Our products are sold around the world and service the electrical power, mining, transportation, military, and architectural markets.
Copper has earned a respected place in the related fields of architecture, building construction, and interior design. From cathedrals to castles and from homes to offices, copper is used for a variety of architectural elements, including roofs, flashings, gutters, downspouts, domes, spires, vaults, wall cladding, and building expansion joints.