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1956 Map of Mendenhall Springs

Name: 1956 Topographic Map of Mendenhall Springs
Creator: U.S. Geological Survey
Published: 1994
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1994

About this map

Lake Del Valle dominates the center of this landscape, its waters contained within the boundaries of Del Valle Regional Park. This map reveals the transition of the Diablo Range into a protected recreational and wildland corridor during the mid-20th century. To the east of the reservoir, the namesake Mendenhall Springs is situated near the slopes of Cedar Mountain, while the massive Hetch Hetchy Aqueduct cuts underground across the northern terrain.

The southern portion of the sheet transitions into the more remote Ohlone Regional Wilderness, characterized by a series of parallel northwest-trending formations including Wauhab Ridge and Valpe Ridge. The infrastructure of Mines Road winds along Arroyo Mocho, reflecting the historic transportation and mining access routes that once served this part of Alameda County. This survey captures a specific moment when water management and wilderness preservation began to define the land use of the eastern East Bay hills.