1989 Map of Twin Bridges SW
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1989 Map of Twin Bridges SW

USGS Topo · Published 1989

About this map

Mining and ranching geography define this Madison County landscape as it appeared in the late 1980s. High-elevation extraction sites like the Elgin Mine and Eclipse Mine are situated among a dense network of prospects and shafts, illustrating the region's enduring mineral interest. To the south, the topography descends into the complex riparian environment of the Big Hole River, where the Third Slough and Owlsley Slough create a braided waterway system essential for local irrigation.


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Map Details

Date Portrayed1989
Date Published1989
PublisherU.S. Geological Survey
Map TypeTopographic
Scale1:24000
Physical Dimensions22 x 26.8 inches

Editions of this 1989 Twin Bridges SW Map

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


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Source Details

CopyrightPublic Domain