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1920 Map of Slate Pass
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1920 Map of Slate Pass

USGS Topo · Published 1920

About this map

The Cascade Range crest divides this high-altitude wilderness survey, where the Chancellor Power Plant stands as a rare industrial marker amidst the peaks. Established in the years following the 1918 forest surveys, this map documents the intricate drainage basins of the Pasayten River and Lightning Creek as they flow from the international boundary toward the interior. The landscape is defined by its critical mountain passages, including Slate Pass, Harts Pass, and Washington Pass, which historically served as the primary routes for miners and early forest rangers.

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Map Details

Date Portrayed1920
Date Published1920
PublisherU.S. Geological Survey
Map TypeTopographic
Scale1:125,000
Physical Dimensions16.77 x 21.62 inches

Editions of this 1920 Slate Pass 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