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1950 Map of Tunnel Hill

Name: 1950 Topographic Map of Tunnel Hill
Creator: U.S. Geological Survey
Published: 1964
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1964

About this map

The Rubicon River carves a deep divide between Placer and El Dorado Counties in this mid-century survey of the California gold country. The landscape is defined by its mining heritage and industrial infrastructure, featuring a series of remote operations like the Boedner Mine near Pennsylvania Point and the Kenna Mine along Missouri Canyon. These sites are linked by a network of unimproved roads and the complex water-management system of the Georgetown Ditch, which follows the contours of the steep ridges to feed local operations.

Small settlements and outpost cabins such as Quintette, Buckeye Flat, and the Edison Cabin indicate a scattered population engaged in logging and resource extraction. The southern portion of the quadrangle is dominated by the Blodgett Experimental Forest, highlighting the area's transition toward scientific forestry management. Landmark elevations like the Bald Mtn Lookout and Sugarloaf provide orientation points over the densely wooded canyons of Tipton Creek and Rock Creek.