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1982 Map of San Bernardino

Name: 1982 Topographic Map of San Bernardino
Creator: U.S. Geological Survey
Published: 1983
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1983

About this map

Norton Air Force Base and the expansive urban grid of San Bernardino anchor the eastern side of this early 1980s survey, illustrating the intense development at the foot of the San Bernardino Mountains. The map traces a massive logistics and transit corridor where the Southern Pacific, Union Pacific, and Atchison Topeka and Santa Fe railroads converge to navigate the Cajon Pass. This geographic bottleneck between the San Gabriel Mountains and the eastern ranges serves as the primary gateway for goods moving from the Los Angeles basin toward Hesperia and the high desert.

Water management is central to the landscape, visible in the winding path of the California Aqueduct and reservoirs like Silverwood Lake and Lake Arrowhead. In the valley below, the industrial footprint of the era is marked by the Fontana International Raceway and the Ontario International Airport, while the northern reaches transition into protected wilderness within the Angeles National Forest and San Bernardino National Forest.