
Picacho Peak and the surrounding Sonoran Desert landscape dominate this survey, centered on the corridor where the Southern Pacific railroad and early highways navigate through Picacho Pass. This desert basin in the early 1960s was a site of significant agricultural and industrial activity, evidenced by the Greene Canal and numerous cattle operations such as La Osa Ranch, Kemper Ranch, and Aguirre Ranch. The map captures a moment of infrastructure development near the Pinal and Pima county line, featuring the Saguaro Power Plant and the sprawling Marana Air Park at the southern edge. Local history is physically anchored at the Mormon Trail Historical Marker 11, while the landscape is defined by the braided channels of McClellan Wash and the Santa Cruz River.
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