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1958 Map of Detert Reservoir

Name: 1958 Topographic Map of Detert Reservoir
Creator: U.S. Geological Survey
Published: 1980
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1980

About this map

The Robert Louis Stevenson Memorial State Park anchors the southern landscape of this 1958 survey, where the rugged Mayacamas Mountains meet the intersection of Lake, Napa, and Sonoma counties. This area is defined by a dense concentration of mercury and silver mining history, with operations like the Mirabel Mine, Silverado Mine, and Oat Hill Mine dotting the ridges and canyons. The presence of these mines along Western Mine Rd and Livermore Road indicates an era of heavy industrial activity in the volcanic terrain of the North Bay hills.

Dramatic geological formations such as The Palisades and Table Mountain loom over the headwaters of St Helena Creek and James Creek. The transition from the 1950s topography to 1980 photorevised updates reveals the expansion of woodland and the enduring presence of the Detert Reservoir in the north. Settlement is sparse, characterized by remote family landmarks like Meiners and the small Landing Strip in Collayomi Valley.