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1986 Map of Mammoth

Name: 1986 Topographic Map of Mammoth
Creator: U.S. Geological Survey
Published: 1987
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1987

About this map

Mining operations and river valleys dominate this mid-1980s landscape at the intersection of several mountain ranges. The San Pedro River serves as a primary corridor, connecting the settlements of Mammoth and San Manuel, the latter being the site of the significant San Manuel Mine. Further north, where the San Pedro meets the Gila River, the industrial towns of Hayden and Winkelman anchor the region's copper-producing infrastructure.

The map reveals a transition from the industrial activity of the river basins to the protected wilderness of the Galiuro Mountains and the Santa Teresa Mountains. Genealogists and historians can trace older extraction sites such as the Silver Queen Mine and Grand Prize Mine in the Tortilla Mountains, while the eastern portion of the sheet is defined by the remote Klondyke settlement and the Sulphur Springs Valley. Transportation relies on the Southern Pacific railroad and Route 77, providing a clear look at the region's late-20th-century development.