1933 Map of Dome Rock Mts

About this map

The Dome Rock Mountains dominate this 1933 survey, representing a period of intense interest in the mineral wealth of Yuma County. Dozens of mining operations punctuate the terrain, from the Dome Basin Mine in the north to the Cinnabar Mine and Copper Chief Mine further south. The landscape is defined by the vital search for water in an arid environment, marked by sites like La Paz Well, Gonzales Well, and Tule Springs. To the west, the Colorado River forms the boundary between Arizona and California, with the Colorado River Indian Reservation occupying the northwestern corner. The map also records the Old Arroyo Reservation Boundary, providing a clear look at the early 20th-century geopolitical and industrial footprint in this corner of the Sonoran Desert.