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1986 Map of Silica Mtn
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1986 Map of Silica Mtn

USGS Topo · Published 1986

About this map

The Calapooya Divide serves as the dominant geographic spine of this mid-1980s landscape, marking the high-elevation boundary between the Lane Co and Douglas Co line. This region is characterized by deep drainage basins and prominent summits, including Silica Mtn, Snow Peak, and Huckleberry Mtn. The hydrology is particularly complex, defined by the headwaters of numerous waterways such as Mosby Creek, Sharps Creek, and the West and East Forks of various local drainages. Within the Umpqua National Forest, the map captures the footprint of logging and resource extraction during the late twentieth century, indicated by a network of unimproved roads and several scattered Quarry sites. Notable landmarks like Huckleberry Spring and Holderman Mtn offer specific points of reference for those studying the forest management patterns and topographic history of this part of the Cascades.

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Map Details

Date Portrayed1986
Date Published1986
PublisherU.S. Geological Survey
Map TypeTopographic
Scale1:24,000
Physical Dimensions21.9 x 26.8 inches

Editions of this 1986 Silica Mtn 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