1966 Map of Blackwater

Rising sharply from the desert floor are several prominent landmarks, most notably Mineral Butte, Twin Buttes, and Walker Butte, which provide vertical contrast to the flat valley basin. To the south, the Casa Grande Ruins National Monument preserves ancient history alongside modern infrastructure like the Southern Pacific railroad and the Old Railroad Grade. This map also captures the transition of the landscape with purple-shaded revisions from 1978, showing developments such as Radio Towers and a Substation near the Hunt Highway.