1973 Map of Mobile NE

About this map

Sierra Estrella dominates the northeastern corner of this desert landscape, its steep slopes descending into the broad expanse of Rainbow Valley. This region in the early 1970s is characterized by sparse development and critical water management infrastructure, evidenced by named reservoirs such as Big Mac Tank, Big Bertha Tank, and East Tank. The Gila River Indian Reservation occupies the northern reaches of the quadrangle, bordering the mountain range. Human activity is largely defined by the Gila and Salt River Meridian and the drainage patterns of Waterman Wash and its West Prong. Sparse roads like Chandler Hts Rd and Riggs Rd provide access to the interior, where a solitary Prospect suggests localized mineral exploration in this arid Maricopa County environment.