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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

The San Gabriel Mountains dominate this 1940 survey, providing a detailed record of water management and forest service infrastructure within the Angeles National Forest. The landscape is centered on the massive San Gabriel Flood Control Reservoir and San Gabriel Dam No 1, which regulated the seasonal flows from the West Fork and East Fork of the river. Just downstream, the northern reach of Morris Reservoir is visible, illustrating the scale of engineering required to manage the region's watershed.

Recreational and administrative sites are scattered throughout the canyons, including Coldbrook Camp and the Coldbrook Guard Station along the northern road. To the south, the Camp Rincon Guard Sta served as a focal point for forest management. This edition captures the early alignment of the Glendora Mountain Road and the Glendora Ridge, along with numerous firebreaks carved into the steep slopes above Smith Mtn and Pine Mtn.