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2010 Map of Grasmere Reservoir

Name: 2010 Topographic Map of Grasmere Reservoir
Creator: U.S. Geological Survey
Published: 2010
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 2010

About this map

Water management and ranching define this high desert landscape in Owyhee County. The Grasmere Dam and its corresponding reservoir stand as significant engineering features in the northern reaches, while the Rattlesnake Creek Dam regulates flows further south. These infrastructure points support the agricultural legacy of the region, anchored by the Hart Ranch and Tindall Ranch, which mark the sparse settlement patterns of this arid plateau.

Drainage systems like Louise Creek, Crab Creek, and Rattlesnake Creek cut through the terrain, leading toward distinctive landforms such as Rattlesnake Basin and the wooded depression of Timber Draw. The presence of the Grasmere Airport indicates the importance of aerial access in this expansive territory, where local travel often relies on a network of established and 4WD roads through areas like Marys Creek.