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1949 Map of North Bloomfield

Name: 1949 Topographic Map of North Bloomfield
Creator: U.S. Geological Survey
Published: 1976
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1976

About this map

Malakoff Diggings and the surrounding hydraulic mining landscape dominate the northern reaches of this survey in Nevada County. At the height of post-war revision, the map details a complex water management system essential to the region's industry, including the Snow Ditch, Blue Ditch, and the extensive Cascade Canal network. The terrain is defined by prominent ridges like San Juan Ridge and Washington Ridge, which channel the South Yuba River through deep canyons.

Settlement patterns reveal a mix of small mining towns and family ranches, from North Bloomfield to the Kirkham Ranch. Local history is preserved through labels for the Blue Tent School and a lonely Pioneer Grave on the ridge. The southern portion is centered on the Scotts Flat Reservoir, illustrating how mid-century infrastructure transformed the high-elevation valleys once dominated by the Murchie Mine and Hoge Mine.