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1947 Map of San Andreas

Name: 1947 Topographic Map of San Andreas
Creator: U.S. Geological Survey
Published: 1947
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1947

About this map

San Andreas and the Mother Lode mining belt dominate this post-war survey, revealing a landscape defined by deep-vein gold extraction and early California ranching. The map details an intensive industrial network surrounding Angels and Altaville, where numerous workings like the Gold Cliff Mine and Sultana Mine cluster along the ridge lines. The presence of the Pacific Southern RR and the Cement Plant at Kentucky House underscores the transition toward larger-scale industrial processing.

Away from the mineral-rich hills, the survey captures traditional land use through family-held operations such as the Filippini Ranch, Beal Ranch, and McCarty Ranch. Public life is anchored by landmarks like the Pioneer Cem and the County Hospital, while the western landscape opens into the Salt Spring Valley, where the Salt Spring Valley Reservoir and small rural schoolhouses like Salt Spring Valley Sch supported scattered agricultural communities.