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1948 Map of Mokelumne Hill

Name: 1948 Topographic Map of Mokelumne Hill
Creator: U.S. Geological Survey
Published: 1985
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1985

About this map

Mokelumne Hill and the steep canyon of the Mokelumne River define this post-war survey of the California Gold Country. The landscape remains heavily marked by mid-century industrial water and power infrastructure, including the Electra Powerhouse, the Amador Canal, and several intricate flumes and siphons serving Lake Tabeaud. This complex network of water management reflects the region's evolution from gold mining toward hydroelectric production.

Evidence of the area's pioneer past remains visible in the Butte City Ruins and the family-operated McSorley Ranch, Lombardi Ranch, and Guffra Ranch. Hard-rock mining legacy is documented at the Le Roi Mine and Blue Jay Mine, while local education is anchored at Milligan Sch. The high-elevation ridges are traversed by Ponderosa Way, providing a detailed look at the rural connectivity between Jackson Butte and the deep gulches of the North Fork Calaveras River.