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1948 Map of Columbia

Name: 1948 Topographic Map of Columbia
Creator: U.S. Geological Survey
Published: 1966
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1966

About this map

Mining operations and historic Mother Lode settlements define this 1948 survey of the Sierra Nevada foothills. The Stanislaus River carves a deep path through the center, separating Calaveras and Tuolumne counties, while the massive Table Mountain formation dominates the southern terrain. The area around Columbia is particularly dense with historical markers, including the Columbia Historic State Park and numerous hard-rock sites such as the Experimental Mine and Springfield Mine.

Evidence of the region's complex water management for hydraulic mining and power is visible in the extensive network of ditches, such as the Utica Ditch and South DITCH. Geologic landmarks like Moaning Caves and the Natural Bridge sit alongside early settlements like Vallecito and Douglas Flat, showing the transition from gold rush era boomtowns to a landscape of timber, represented by Stanislaus National Forest, and early aviation at the Columbia Airport.