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2015 Map of Brennan Flat

Name: 2015 Topographic Map of Brennan Flat
Creator: U.S. Geological Survey
Published: 2015
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 2015

About this map

The Cheyenne River carves a winding path through this portion of Pennington County, defining a landscape of dramatic elevation changes and named geographical benches. High plateaus such as Quinn Table, Seventyone Table, and Kube Table rise above the river valley, while broad alluvial plains like Brennan Flat and Holcomb Flat occupy the lower reaches. These "tables" are characteristic of the region's topography, representing resistant landforms that have withstood the erosion that formed the surrounding draws.

Transportation in this rural South Dakota landscape is defined by long, straight sections of Base Line Rd and Higgins Rd, which follow the township and range survey lines. Drainage features including Timber Draw and Farnum Draw channel runoff toward the main river, while smaller tributaries like Beaver Cr and Bear Cr contribute to the watershed. The map records a sparsely populated area where land use is closely tied to the available flat ground atop the tables or within the river flats.