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2004 Map of Courtright Reservoir, 2007 Print
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2004 Map of Courtright Reservoir

USGS Topo · Published 2007

About this map

Courtright Reservoir and Wishon Reservoir anchor this high-altitude landscape in the Sierra National Forest. The map documents a sophisticated hydroelectric infrastructure, including the Underground Powerhouse, Surge Chamber, and Wishon Dam, which together form part of the Helms project. Beyond the industrial footprint, the terrain is marked by seasonal encampments and specialized sites like Chamberlain Camp, China Camp, and Moore Boys Camp. The transition from managed forest to protected wilderness is clear, with the John Muir Wilderness and Dinkey Lakes Wilderness covering much of the eastern and northern reaches. For researchers, the presence of the Prospect Mine and the Courtright Intrusive Contact Zone Geological Area highlights the region's complex mineral and geological history, while the Dusy-Ershim OHV Route indicates the area's role in back-country recreation.

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Map Details

Date Portrayed2004
Date Published2007
PublisherU.S. Geological Survey
Map TypeTopographic
Scale1:24,000
Physical Dimensions21.5 x 26.8 inches

Editions of this 2004 Courtright Reservoir Map

This is the sole edition of this map. No revisions or reprints were ever made.

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Source Details

SourceU.S. Geological Survey
CopyrightPublic Domain