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1931 Map of Red Mountain

Name: 1931 Topographic Map of Red Mountain
Creator: U.S. Geological Survey
Published: 1931
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1931

About this map

The Angeles National Forest dominates this 1931 topographic study, capturing the steep drainage systems of northern Los Angeles County before extensive modern development. Steep terrain is bisected by the San Francisquito Canyon and Elizabeth Lake Canyon, showing the area just years after the devastating 1928 dam failure downstream. The presence of the Power House No 2 Reservoir indicates the early 20th-century focus on hydroelectric infrastructure and water management for the growing coastal basin.

Notable landmarks like Red Mtn and the hand-surveyed Castaic-Red Mountain Fire Break reflect the forest management and fire prevention efforts of the era. The mapping of Drinkwater Flat and various canyons like Necktie Canyon provides a record of the landscape's natural features as they existed during the early Depression years, documented by county surveyor J. E. Rockhold and federal topographers.