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1951 Map of North Bloomfield

Name: 1951 Topographic Map of North Bloomfield
Creator: U.S. Geological Survey
Published: 1951
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1951

About this map

San Juan Ridge and its neighboring plateaus define this landscape, where the scars of hydraulic mining remain evident at sites like the Malakoff Diggings. The map captures the complex water management system of the mid-20th century, featuring the Scotts Flat Reservoir and an intricate network of infrastructure including the Blue Ditch, various canals, and flumes designed to move water across the ridgelines. These systems supported both remnant mining operations at the Hoge Mine and Murchie Mine as well as local ranching at Kirkham Ranch and Casci Ranch.

Social history is preserved through the locations of the Blue Tent School and the isolated Pioneer Grave near Washington Ridge. The geography is bisected by the South Yuba River, with the Tahoe National Forest spanning the rugged canyons. Settled life centers on historic hamlets like North Bloomfield and Lake City, while landmarks such as Mountain Girls Camp reflect the area's transition into a recreational and residential forest zone.