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1941 Map of Alder Creek, 1960 Print
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1941 Map of Alder Creek

USGS Topo · Published 1960

About this map

Monte Cristo Mine and the Falcon Mine speak to the early prospecting history of the San Gabriel Mountains as captured in this mid-century survey. Within the high peaks and steep drainage of the Angeles National Forest, the Loomis Ranch remains a notable isolated settlement amidst a landscape defined by seasonal springs and mountain summits like Pacifico Mtn and Granite Mtn. The map documents a period of early infrastructure development in the backcountry, showing the Angeles Forest Highway winding through the terrain alongside clearings like Chilao Flats. This 1941 edition, revised with 1948 culture, also records the placement of the Chilao Guard Station and the State Highway Maintenance Sta, indicating the growing administrative and fire-prevention presence of the U.S. Forest Service and Los Angeles County. Networked firebreaks are etched across the ridges, and numerous springs such as Fountainhead Spring and Sheepcamp Spring are identified as critical water sources in the high country.

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Map Details

Date Portrayed1941
Date Published1960
PublisherU.S. Geological Survey
Map TypeTopographic
Scale1:24000
Physical Dimensions16.9 x 20.8 inches

Editions of this 1941 Alder Creek Map

Historical Maps of Chilao Through Time

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Source Details

SourceU.S. Geological Survey
CopyrightPublic Domain