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1937 Map of San Francisquito

Name: 1937 Topographic Map of San Francisquito
Creator: U.S. Geological Survey
Published: 1937
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1937

About this map

San Francisquito Power House No 1 and its associated infrastructure define this 1930s survey of the high desert canyons north of Los Angeles. The map documents a critical era of water and power management, featuring the Aqueduct, a prominent Surge Tank, and the Los Angeles City Transmission Line cutting through the steep terrain of the Angeles National Forest.

The landscape is dominated by the ridges of the Sierra Pelona and Jupiter Mountain, where deep drainages like San Francisquito Canyon and Bouquet Canyon provide narrow corridors for travel and utility development. Geographers and historians can trace the early fire management network through mapped Fire Control Lines and Firebreaks that traverse the slopes above San Francisquito Creek. The eastern portion of the sheet shows the early footprint of the Bouquet Reservoir, illustrating the massive engineering efforts required to sustain the region's mid-century growth.