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1940 Map of Mt. Emma
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1940 Map of Mt. Emma

USGS Topo · Published 1940

About this map

Little Rock Palmdale Dam stands as a significant hydrological marker in this 1930s survey of the San Gabriel Mountains. The landscape reflects early mid-century resource management and mountain infrastructure within the Angeles National Forest, characterized by the presence of a CCC Camp and a Gaging Sta along Little Rock Creek. These features, alongside the Transmission Line and a prominent Firebreak, indicate a period of active federal and county development aimed at fire suppression and water control. Settled life is represented by the Wagonwheel Ranch, located near the intersection of various canyons such as Soledad Canyon and Aliso Canyon. The map reveals the intricate drainage patterns of the high country, tracing the paths of Santiago Creek and the West Fork Canyon as they carve through the steep terrain between Mt Emma and Bare Mountain.

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Map Details

Date Portrayed1940
Date Published1940
PublisherU.S. Geological Survey
Map TypeTopographic
Scale1:24000
Physical Dimensions17.2 x 20.3 inches

Editions of this 1940 Mt. Emma Map

Historical Maps of Los Angeles County Through Time

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Source Details

SourceU.S. Geological Survey
CopyrightPublic Domain