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1995 Map of Bologna Basin, 1998 Print
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1995 Map of Bologna Basin

USGS Topo · Published 1998

About this map

Bologna Basin and the surrounding drainages of the Umatilla National Forest dominate this mid-1990s survey of Grant County. The landscape is defined by the deep incisions of Bologna Canyon and Portuguese Canyon, which channel water toward the North Fork John Day River. This confluence point represents a critical hydrological junction in the high desert, where the river's path is reinforced by a levee system near BM 1950.

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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 Bologna Basin 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