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1966 Map of Azusa

Name: 1966 Topographic Map of Azusa
Creator: U.S. Geological Survey
Published: 1975
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1975

About this map

The San Gabriel River carves through the steep mountain terrain of the Angeles National Forest, flowing past high peaks like Monrovia Peak and Rankin Peak toward the suburban expansion below. By the mid-1960s, the foothills and valleys were transitioning into dense residential and industrial corridors, visible in the growth of Monrovia, Duarte, and Azusa. This era saw the significant development of the Santa Fe Flood Control Basin and the prominence of large medical and social institutions like the City of Hope National Medical Center.

Major water management infrastructure, including the Cogswell Reservoir and Morris Reservoir, dominates the northern drainage patterns, supporting the thirsty metropolitan area. Industrial activity is concentrated near the river’s exit from the mountains, marked by a large Gravel Pit in Irwindale. Community life is anchored by numerous local institutions such as the Immaculate Conception Sch and the Manresa Retreat, reflecting the mid-century suburbanization of the San Gabriel Valley.