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1990 Map of Poison Creek Slough
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1990 Map of Poison Creek Slough

USGS Topo · Published 1990

About this map

The Harney Valley floor is defined by a complex network of waterways and drainage features, as captured in this late-twentieth-century study of the high desert landscape. The Silvies River meanders through the southern reaches, feeding into a series of distinctive channels including Poison Creek Slough, Foley Slough, and Emigrant Slough. This intricate hydraulic system is managed by infrastructure like the Upper Hanley Dam Spillway, illustrating the efforts to control water flow across this level basin.

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Map Details

Date Portrayed1990
Date Published1990
PublisherU.S. Geological Survey
Map TypeTopographic
Scale1:24000
Physical Dimensions21.9 x 26.6 inches

Editions of this 1990 Poison Creek Slough Map

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

Historical Maps of Harney County Through Time

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Source Details

SourceU.S. Geological Survey
CopyrightPublic Domain