1949 Map of North Bloomfield, 1957 Print
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1949 Map of North Bloomfield

USGS Topo · Published 1957

About this map

Malakoff Diggings and other hydraulic mining sites dominate this 1949 survey of Nevada County, showing a landscape deeply altered by the quest for gold. The map centers on the high ridges between the South Fork Yuba River and Deer Creek, where historic settlements like North Bloomfield and North Columbia supported a massive industrial extraction effort. This era of water-powered mining is clearly etched into the terrain through an extensive network of infrastructure, including the Cascade Canal, various ditches, and flumes designed to move water across San Juan Ridge and Washington Ridge.


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Map Details

Date Portrayed1949
Date Published1957
PublisherU.S. Geological Survey
Map TypeTopographic
Scale1:24,000
Physical Dimensions21.9 x 26.8 inches

Editions of this 1949 North Bloomfield Map


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Source Details

CopyrightPublic Domain