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1982 Map of Courtright Reservoir, 1983 Print
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1982 Map of Courtright Reservoir

USGS Topo · Published 1983

About this map

The Courtright Reservoir and Wishon Reservoir dominate this high-elevation landscape within the Sierra National Forest. The map documents a sophisticated hydroelectric infrastructure managed by Pacific Gas and Electric Company, featuring the Underground Powerhouse, multiple Surge Chambers, and a Substation near Wishon Dam. This industrial footprint exists alongside recreational and wilderness sites like the Marmot Rock Campground and the edge of the John Muir Wilderness.

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Map Details

Date Portrayed1982
Date Published1983
PublisherU.S. Geological Survey
Map TypeTopographic
Scale1:24,000
Physical Dimensions22.22 x 27.13 inches

Editions of this 1982 Courtright Reservoir Map

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Source Details

SourceU.S. Geological Survey
CopyrightPublic Domain