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1990 Map of Lone Mountain

Name: 1990 Topographic Map of Lone Mountain
Creator: U.S. Geological Survey
Published: 1990
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1990

About this map

The Eagletail Mountains define the southern horizon of this arid landscape, where a prominent Natural Arch marks the high ridges above several Open Pit Mines and a Quarry. To the north, the terrain transitions into the broad expanse of the Harquahala Plain and Adobe Flats, areas historically reliant on scattered water sources like Government Well and the Lone Mountain Well.

The central portion of the map is dominated by the modern engineering of the Granite Reef Aqueduct, which cuts across the basin near the seasonal Centennial Wash. This 1990 provisional update shows the intersection of traditional desert landmarks, such as Lone Mountain Tank, with 20th-century infrastructure including a Radio Tower, a remote Landing Strip, and a network of pumping stations. The presence of numerous prospects and mine shafts throughout the mountains suggests a long history of mineral exploration in this corner of La Paz County.