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1952 Map of Omo Ranch

Name: 1952 Topographic Map of Omo Ranch
Creator: U.S. Geological Survey
Published: 1960
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1960

About this map

Gold mining operations and logging roads define this stretch of the Eldorado National Forest in the early 1950s. The landscape is heavily marked by the legacy of the California Gold Rush, specifically around Henrys Diggings, where a dense concentration of claims such as the Caldor Mine, Old Empire Mine, and Irish Slide Mine follow the terrain north of the Middle Fork Cosumnes River. These names suggest a period of intense extraction that shaped the local geography long before the mid-century field check.

Evidence of early mountain settlements and timber industry infrastructure appears at Omo Ranch and the Andreasson Mill Site. Genealogists may find value in the location of the Andreasson Cem and several rural schoolhouses, including Indian Diggings Sch and Willow Sch. The presence of a logging road network and multiple ditches indicates a landscape managed for both resources and water transport, transitioning from the deep mining era to modern forest management.