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1979 Map of Three Points

Name: 1979 Topographic Map of Three Points
Creator: U.S. Geological Survey
Published: 1979
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1979

About this map

Three Points and the neighboring Robles Junction serve as the focal points for this late-1970s desert landscape, where the valley floor meets the base of the Roskruge Mountains and the Sierrita Mountains. The intersection of state routes near the Mary E Dill Sch marks a transition from open rangeland to early suburban grid developments, evidenced by the emerging residential streets south of Diamond Bell Ranch Road.

Water management is central to the area's utility, with a network of catchments like Javelina Tank and Sierrita Tank supporting ranching activities alongside deep-set water sources such as the Santa Teresa Well. The terrain is defined by the braided channels of Brawley Wash and Mendoza Wash, while the presence of a Rifle Range and a US Military Reservation indicates the diverse land use of this Pima County corridor during the era of photogrammetric mapping.