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1990 Map of Triangle

Name: 1990 Topographic Map of Triangle
Creator: U.S. Geological Survey
Published: 1990
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1990

About this map

The Owyhee Mountains dominate this high-desert landscape in southwestern Idaho, a region defined by deeply incised canyons and high basalt plateaus. At the time of this 1990 revision, the isolated settlement of Triangle and the riverside community of Grand View serve as primary landmarks in a territory largely shaped by the cattle industry and legacy mining. Resource extraction is evidenced by the Black Warrior Mine and Bluebird Mine, located among the complex drainage networks of Silver City and Jordan Creek.

The map reveals a landscape of massive tablelands like Pleasant Valley Table and Avery Table, punctuated by distinct volcanic features such as Big Springs Butte. Water is the critical architect here, from the wide Snake River at the northeastern corner to the intricate systems of Big Jacks Creek and Wickahoney Creek that carve through the Owyhee Plateau. This topographical study captures the vast spatial relationships of Owyhee Ridge and the Chalk Hills before modern digital mapping became the standard.