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1952 Map of Duncan Peak

Name: 1952 Topographic Map of Duncan Peak
Creator: U.S. Geological Survey
Published: 1976
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1976

About this map

Whisky Hill and the surrounding drainages of the North Fork American River define this mid-century topographic portrait of Placer County gold country. The map documents an intensive historical mining landscape within the Tahoe National Forest, where the complex water systems of the Iowa Hill Ditch supported operations across steep ridges. Significant industrial remnants are recorded through numerous subterranean features, including the Union Tunnel, Hungry Hollow Tunnel, and Macedon Tunnel.

Remote settlements and camps like Secret House and Mumford Bar sit alongside several named mines, such as the American Hill Mine and Green Mine. The terrain is characterized by high-elevation landmarks like Duncan Peak and Sugar Pine Point, while the lower canyons are marked by the Savage Workings and the Golden Gate No 1 Mine. These labels reflect a period when the region's extractive history remained clearly etched into the topography, from the American Hill Reservoir down to the confluence at the North Fk Middle Fork American R.