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2021 Map of Twentymile Hill

Name: 2021 Topographic Map of Twentymile Hill
Creator: U.S. Geological Survey
Published: 2021
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 2021

About this map

Twentymile Hill and Red Hill anchor this high-plateau landscape in Navajo County, where water management is the primary human footprint. The map documents a network of livestock tanks essential for ranching in this arid environment, including White Tank, Cement Tank, and Twin Tanks. The rugged drainage of Chevelon Canyon cuts through the eastern edge of the quadrangle, with Chevelon Cr and Potato Wash defining the local hydrology.

Remote ranch roads such as Thunder Rd, Pinto Rd, and Stallion Rd provide the only access across the vast open range. The surveying grid of T16N and T17N reveals the systematic division of this territory, where the distance between isolated landmarks like Coyote Tank and Big Tanks illustrates the scale of operations required to sustain life and industry in the Arizona high country during the early 21st century.