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2020 Map of Dewey

Name: 2020 Topographic Map of Dewey
Creator: U.S. Geological Survey
Published: 2020
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 2020

About this map

The Colorado River carves through this high desert region of Grand County, defining a series of alluvial flats and dramatic geological formations. Along its course, named bottomlands such as Ninemile Bottom, Hittle Bottom, and Hotel Bottom served as vital level ground for local activity. The landmark Dewey Bridge provides a historic crossing point where the river meets the Dolores River confluence, south of the Cisco Wash.

Upland features dominate the surrounding terrain, including the expansive Richardson Amphitheater and the geological curiosity of Arrowhead Arch. Remote transport routes like Old Sharp Ranch Rd and Gold Mine RD hint at a history of ranching and resource extraction. The landscape is further characterized by deep incisions like Yellow Jacket Canyon and the broad Professor Valley, showing the complex erosion patterns that have shaped this portion of the Dome Plateau.