1979 Map of Summit Reservoir

About this map

Bennett Hills and the Black Butte Hills define this high-desert landscape in south-central Idaho, where water management is the primary signature of human activity. The terrain is marked by an extensive network of small reservoirs and springs, including Summit Reservoir, Granite Butte Reservoir, and the descriptively named Flat Tire Reservoir. These catchment areas, often paired with infrastructure like the Brailsford Well or Association Well, reveal the necessities of ranching and survival in a region characterized by prominent volcanic features and lava flows. The Union Pacific rail line skirts the northeastern corner near Little Magic Res, providing a lone industrial corridor through a territory otherwise defined by remote jeep trails and named watering holes like One Hour Reservoir and Bailing Reservoir.