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1990 Map of Slumgullion Pass

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

USGS Topo · Published 1990

About this map

The Castle Dome Mountains dominate this arid landscape within the Kofa National Wildlife Refuge in Yuma County. This provisional 1990 survey, based on data collected across several decades, reveals a high concentration of mineral exploration and water management in a desert environment. Prospectors and miners were active at the Big Eye Mine and the Keystone Mine, while several unnamed Mine Shaft and Prospects labels indicate widespread extraction efforts.

Water security is a primary theme of the terrain, evidenced by man-made structures like Ketcherside Dam and specialized collection points such as Castle Rock Tank, Blue Rock Tank, and Tinaja Segá. These features, alongside Adams Well, were critical for sustaining activity near Slumgullion Pass and across the desert floor of King Valley. The map also details drainage patterns through the Gravel Wash and Big Eye Wash, illustrating the hydrology of this protected wilderness.