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1952 Map of Michigan Bluff

Name: 1952 Topographic Map of Michigan Bluff
Creator: U.S. Geological Survey
Published: 1954
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1954

About this map

Michigan Bluff serves as the focal point for this early 1950s survey of the California gold country, situated on a ridge between Michigan Canyon and the Middle Fork American River. The map reveals an intensive history of resource extraction, with the landscape marked by hydraulic mining operations at Big Gun Diggings and Digger Diggings. The presence of several historic locations like Maintop, Deadwood, and Sunny South suggests a shift from active gold-rush towns to remote forest sites by the mid-20th century.

Deep in the Eldorado National Forest, the map captures a network of mining infrastructure including the Mountain Chief Tunnel, the Water Tunnel near Devils Thumb, and dozens of individual claims such as the Golden Gate Mine and Anna Sue Mine. Transportation is defined by the steep canyon geography, featuring the Cedar Springs Flight Strip atop Peavine Ridge and the Mosquito Ridge Lookout monitoring the junction of the North Fork American River and the Rubicon River.