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2021 Map of Brennan Flat

Name: 2021 Topographic Map of Brennan Flat
Creator: U.S. Geological Survey
Published: 2021
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 2021

About this map

The Cheyenne River winds through this section of Pennington County, South Dakota, defining a landscape of distinct topographic benches and intermittent drainages. The map reveals a land divided into named flats and tables, including Brennan Flat and Holcomb Flat in the northern and central portions, while more elevated plateaus like Quinn Table, Seventyone Table, and Kube Table dominate the southern half. These landforms indicate a ranching or grazing environment where geography dictates movement and settlement patterns.

Local transport is marked by a sparse grid of rural routes such as Owanka Rd and Base Line Rd, which traverse the open country between the river and its tributaries like Beaver Cr. The terrain is further etched by seasonal watercourses like Timber Draw and Farnum Draw, showing the intricate erosion patterns typical of this Western South Dakota region as it was recorded in the early twenty-first century.