2021 Map of Gap Tank

About this map

The West Silver Bell Mountains dominate the northeastern corner of this desert landscape, where steep contours give way to the broad alluvial expanses of the Aguirre Valley. This area in Pima County is defined by its ephemeral drainage systems, including El Tiro Wash, Mammoth Wash, and Aguirre Wash, which carve through the arid terrain. The namesake Gap Tank sits isolated in the central portion of the sheet, representing a critical water catchment point in an otherwise dry environment. The cadastral grid of t11s r6e and t11s r7e organizes the territory, illustrating the intersection of natural topography and legal land divisions in the modern era.