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1940 Map of Camp Rincon

Name: 1940 Topographic Map of Camp Rincon
Creator: U.S. Geological Survey
Published: 1940
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1940

About this map

San Gabriel Mountains hydrology and infrastructure dominate this 1930s-era topography, focused on the critical water management systems north of Azusa. The San Gabriel Flood Control Reservoir and Morris Reservoir are centerpieces of the landscape, managed by the massive San Gabriel Dam No 1. These engineering works transformed the deep canyons where the North Fork and West Fork converge, marking a significant era of regional flood control and water storage for Los Angeles County.

Local mountain life is evident at Coldbrook Camp and the Coldbrook Guard Station in the upper reaches of the canyon. A network of firebreaks cuts through the steep terrain between peaks like Smith Mtn and Pine Mtn. The presence of the Canyon Sch near the river bank suggests a small, localized community supporting the dam operations and forest management at Camp Rincon Guard Sta before the full development of the modern canyon recreation corridors.