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1915 Map of Priest Valley
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1915 Map of Priest Valley

USGS Topo · Published 1915

About this map

New Idria and its associated Idria PO serve as a central hub for the quicksilver mining activity that dominated the southern Diablo Range in the early 20th century. This area is defined by a series of northwest-trending ridges including Mustang Ridge and Juniper Ridge, with the San Lorenzo River and Peachtree Creek carving through the valleys. The map documents an extensive network of remote mining operations like the Picacho Mine, Gem Mine, and the Monterey Coal Mine, highlighting the era's reliance on mineral extraction.

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Map Details

Date Portrayed1915
Date Published1915
PublisherU.S. Geological Survey
Map TypeTopographic
Scale1:125,000
Physical Dimensions16.53 x 19.96 inches

Editions of this 1915 Priest Valley Map

Historical Maps of Priest Valley Through Time

333 maps found

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Source Details

SourceU.S. Geological Survey
CopyrightPublic Domain