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1952 Map of Duncan Peak

Name: 1952 Topographic Map of Duncan Peak
Creator: U.S. Geological Survey
Published: 1980
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1980

About this map

Whisky Hill and the surrounding gold-bearing ridges dominate this mid-century survey of the Tahoe National Forest high country. The landscape is a complex network of hydraulic mining infrastructure and subterranean workings, evidenced by the Iowa Hill Ditch winding across the slopes and several named bores such as Hogsback Tunnel and Golden Fleece Tunnel. Mining operations are scattered throughout the drainages, with the American Hill Mine and Macedon Mine marking areas of significant historical extraction.

Logistics in this steep terrain relied on a combination of established routes like the Forest Hill Divide Road and primitive paths including the Mumford Bar Trail. Notable high-ground landmarks include the Duncan Peak Lookout Tower and the abandoned Big Valley Bluff Lookout, which once provided vital overwatch for the surrounding timberlands. Water management for both mining and local use is visible at the American Hill Reservoir and the Deep Trap Line Ditch near the southern boundary.