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1916 Map of Copperopolis

Name: 1916 Topographic Map of Copperopolis
Creator: U.S. Geological Survey
Published: 1947
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1947

About this map

The copper-rich hills of Calaveras County define this landscape during the mid-1910s, centering on the mining hub of Copperopolis. The terrain is marked by industrial activity and historical land grants, notably the Rancheria Del Rio Estanislao, which stretches across the southern portion of the sheet. Mining operations like the Wilbur-Womble Mine near Hodson and the Napoleon Mine illustrate the region's extraction-based economy. The Stanislaus River serves as a critical geographic and administrative boundary, carved by steep canyons and crossed by historic transit points such as O'Byrnes Ferry and Central Ferry.

Transportation networks are well-established, with the Sierra Ry of California cutting through the southwestern corner near Orange Blossom School. The map captures a transitional era where old ranching outposts like Curtin Ranch and Rushing Ranch coexist with engineering feats like the Stanislaus Tunnel and Cashman Dam. This survey provides a look at the intricate canyon systems and the high ridges of Gopher Ridge, documenting the relationship between the river's path and the development of Knights Ferry.