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1981 Map of Twin Buttes

Name: 1981 Topographic Map of Twin Buttes
Creator: U.S. Geological Survey
Published: 1981
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1981

About this map

Large-scale copper extraction dominates this Pima County landscape, where the massive excavations of the Mission Mine, Pima Mine, and Twin Buttes Mine have reshaped the desert floor with extensive Mine Dump terraces and sprawling Tailings Ponds. The industrial footprint is supported by the Southern Pacific railroad and specialized infrastructure like the Sierrita Mill and complex conveyor systems.

Beyond the modern open pits, evidence of earlier mining eras remains visible in smaller prospects such as the Paymaster Mine, Senator Morgan Mine, and Dogtown Mine. Local heritage is anchored by the Twin Buttes Cem and the settlement at Demetrie, while prominent natural landmarks like Helmet Peak and Mineral Hill provide geographic context amidst the heavy industry. Private landholdings like the Ruby Star Ranch sit on the periphery of this active mineral district.