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1983 Map of Florence Lake

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

USGS Topo · Published 1983

About this map

The high Sierra Nevada landscape of Fresno County is defined here by the extensive hydroelectric infrastructure of the Florence Lake and Lake Thomas A Edison reservoirs. This 1983 survey illustrates a complex network of utility management within the Sierra National Forest, including the Vermilion Valley Dam, numerous gaging stations, and a series of diversion tunnels and siphons that redirect the South Fork San Joaquin River and its tributaries.

Beyond the industrial footprint, the map details a world of alpine lakes and meadows accessed by the Pacific Crest Trail and the John Muir Trail. Localities such as Mono and Florence Rock serve as anchor points for the area's recreational use. The terrain is marked by distinctive granite features like Bear Dome and the Infant Buttes, while smaller water bodies such as Sallie Keyes Lakes and Hooper Lake populate the high-elevation basins of the John Muir Wilderness.