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1995 Map of Thompson Flat, 1998 Print
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1995 Map of Thompson Flat

USGS Topo · Published 1998

About this map

Thompson Flat sits at the high-elevation intersection of the Heppner Ranger District and the Morrow and Umatilla county line. This mid-1990s landscape within the Umatilla National Forest is defined by its water management and temporary forest settlements, such as Juniper Camp and Thompson Corral. The terrain is deeply incised by drainages like Potamus Creek and Ellis Creek, which drop away from the prominent Potamus Point. A notable concentration of exploration activity is evident through numerous Drill Holes scattered across the eastern plateaus. Water resources are critical in this upland environment, documented by a network of improved sites including Thompson Flat Well, Matlock Waterhole, and Divide Well. The southern edge of the map follows the National Forest Boundary, briefly touching the John Day River near the secluded Florence Cabin.

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Map Details

Date Portrayed1995
Date Published1998
PublisherU.S. Geological Survey
Map TypeTopographic
Scale1:24,000
Physical Dimensions22 x 26.9 inches

Editions of this 1995 Thompson Flat 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