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1990 Map of South Mountain

Name: 1990 Topographic Map of South Mountain
Creator: U.S. Geological Survey
Published: 1990
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1990

About this map

The high plateau of the Modoc National Forest dominates this topographic survey, revealing a landscape managed for water and timber in the final decade of the twentieth century. Irrigation and livestock management are evident through the network of tanks and reservoirs, including Telephone Flat Reservoir, Deer Hill Reservoir, and Bayley Tank. These features suggest a seasonal rhythm of land use in a region where water is a critical resource.

History and genealogy enthusiasts can trace the early human footprint through labels like Willow Creek Ranch and the Mulkey Place (Site), providing evidence of past habitations in this high country. The terrain is defined by volcanic features such as South Mountain and Juniper Ridge, with numerous dry lakes and seasonal drainages like Fletcher Creek and Grassy Ravine that characterize the arid environment of this section of Northern California.