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1956 Map of Bristol Lake

Name: 1956 Topographic Map of Bristol Lake
Creator: U.S. Geological Survey
Published: 1958
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1958

About this map

Bristol Lake dominates this desert landscape in the mid-1950s, characterized by the extensive Salt Evaporators in its northern basin. This area represents a critical intersection of industrial extraction and military presence, as the Marine Corps Training Center occupies a significant portion of the western terrain. The survey captures the industrial footprint of the era, from the Calumet Mine in the east to numerous unnamed Prospect sites scattered across the northern foothills.

Surface transportation is defined by the Amboy Road and various Jeep Trails that negotiate the high-relief terrain of the Calumet Mountains and the Bullion Mts. These tracks provide the only access to remote mining claims and the wide expanse of the Cadiz Valley, illustrating the sparse but purposeful human activity in the San Bernardino desert before modern expansion. The map also delineates the northern edges of the Sheep Hole Mts, serving as a record of land use ranging from salt harvesting to defensive maneuvers.