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1949 Map of Alleghany

Name: 1949 Topographic Map of Alleghany
Creator: U.S. Geological Survey
Published: 1965
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1965

About this map

Gold mining operations and remote Sierran settlements dominate this mid-century survey of the Tahoe National Forest region. The community of Alleghany serves as the focal point, surrounded by a high density of quartz and drift mines that reveal the area's industrial legacy. Notable active and inactive workings include the Sixteen To One Mine, Tightner Mine, and Yellow Jacket Mine, which trace the mineral-rich veins of Pliocene Ridge and Lafayette Ridge.

The landscape is marked by the sites of former hydraulic mining centers like Moores Flat, Orleans Flat, and Woolsey Flat, now largely reverted to wilderness. Historically significant routes like the Hennessey Pass Road and the Lafayette Ridge Trail cross the steep canyons formed by the Middle Fork Yuba River and Kanaka Creek. High-elevation landmarks such as Bald Mtn and Chips Flat provide context for the challenging geography faced by early miners and homesteaders at Hagerty Ranch and Robbins Ranch.