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1989 Map of Devils Slide
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1989 Map of Devils Slide

USGS Topo · Published 1989

About this map

The South Fork Tolt Reservoir dominates this portion of the Snoqualmie National Forest, serving as a critical infrastructure point within the Watershed Boundary (City of Seattle). This 1980s provisional survey illustrates a landscape defined by hydraulic engineering and forest management, where Intake Towers and a Gaging Station monitor the water supply. The terrain rises sharply toward landmarks such as the Devils Slide and the Cascade 3702 Lookout Tower, while the southern reaches are drained by the North Fork Snoqualmie River. Smaller water bodies like Lynch Lake, Black Lake, and the uniquely named Lake Titicaca dot the high elevations. For the researcher, the map preserves the exact locations of service infrastructure like Wagner Bridge and numerous resource extraction sites including quarries and borrow pits that supported the development of this protected watershed.

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Map Details

Date Portrayed1989
Date Published1989
PublisherU.S. Geological Survey
Map TypeTopographic
Scale1:24,000
Physical Dimensions22.2 x 27 inches

Editions of this 1989 Devils Slide 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