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1929 Map of Sylmar

Name: 1929 Topographic Map of Sylmar
Creator: U.S. Geological Survey
Published: 1929
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1929

About this map

San Gabriel Mountains peaks and deep drainage canyons dominate this 1929 survey, which captures the northern edge of the Los Angeles basin during a period when the area was known for its specialized medical facilities. The map highlights a cluster of large institutions at the mountain's base, including the Olive View Sanatorium, the Government Sanatorium, and the U S Veterans Sanatorium. These locations were chosen for their elevation and air quality, essential for respiratory care at the time.

Industrial and infrastructure expansion is evident through the presence of a Power Line, a Transmission Line, and an Aqueduct cutting across the foothills. The Angelles National Forest covers much of the high ground, where rugged terrain is defined by Placerita Canyon and Newhall Creek. The Los Angeles City Boundary Line is also clearly marked, showing the municipal limits as they existed before the mid-century suburban boom.