1990 Map of Seneca
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1990 Map of Seneca

USGS Topo · Published 1990

About this map

Seneca occupies the southern reach of Bear Valley in this topographic study, where the timber and ranching history of Grant County is clearly etched into the terrain. The landscape is defined by the convergence of the Silvies River and Bear Creek, set against the backdrop of the Malheur National Forest and the Aldrich Mountains. This map documents a transitional period in local infrastructure, showing the Abandoned Railroad and Old Railroad Grade that once served the region's logging industry. Numerous family-named sites like Southworth Ranch, Oliver Ranch, and Biggs Ranch indicate a long-standing agricultural presence, while the Southworth Cem provides a specific point of interest for genealogical research. Higher elevations are marked by landmarks such as Starr Ridge and Sugarloaf, along with remote outposts like Hunters Cabin and Frys Camp.


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Map Details

Date Portrayed1990
Date Published1990
PublisherU.S. Geological Survey
Map TypeTopographic
Scale1:24,000
Physical Dimensions21.9 x 26.8 inches

Editions of this 1990 Seneca Map

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


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Source Details

CopyrightPublic Domain