
Yuma sits at the vital junction of the River Colorado and the Gila River, serving as a critical transport and agricultural hub at the turn of the twentieth century. This survey documents the complex engineering required to harness the desert, featuring early irrigation infrastructure like the Imperial Canal, Pilot Knob Pump, and several reservoirs. The landscape is defined by the stark contrast between the fertile river bottomlands and the surrounding arid ranges, including the Cargo Muchacho Mountains and Chocolate Mountains.
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