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1972 Map of Red Knolls

Name: 1972 Topographic Map of Red Knolls
Creator: U.S. Geological Survey
Published: 1974
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1974

About this map

Whirlwind Valley and the central uplift of the Red Knolls dominate this 1970s landscape, characterized by a complex network of ephemeral drainage systems and livestock-management infrastructure. The topography is defined by the erosion-carved ridges of Long Ridge and Soap Hollow, which channel seasonal runoff into essential water catchments. These catchments, including Swasey Reservoir No 4, Soap Wash Reservoir, and Highway Reservoir, provided the vital water supply necessary for ranching operations in this arid portion of Millard County.

Industrial activity is noted by several Gravel Pit sites and a single Prospect located near the northern wash, suggesting small-scale extraction and mineral exploration. The presence of a Corral and numerous fence lines, marked by fine red dashed lines, illustrates the continued use of the land for open-range grazing. Water management is further detailed through Swasey Wash, Soap Wash, and Tix Well Wash, which highlight the natural pathways utilized by the U.S. Geological Survey to map the region's unique desert hydrology.