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1990 Map of Chipmunk Ridge

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

USGS Topo · Published 1990

About this map

Emerson Ridge and Boulder Ridge define the steep, drainage-cut topography of this Douglas County timberland during the late twentieth century. The Middle Fork Coquille River enters the terrain near Mystic Creek, while a network of 4WD tracks provides access to the high elevations of Chipmunk Ridge. Evidence of local industry and resource extraction is visible through several labeled Quarry and Borrow Pit locations, particularly along the lower slopes and creek beds.

Water sources like Buck Spring and Michigan Spring are noted among the dense system of streams, including Twelvemile Creek and Battle Creek. The southern portion of the survey is anchored by Big Dutchman Butte and Sixmile Ridge, showing the land as it was documented in 1983 aerial photography and field-checked in 1988. This map captures the intersection of industrial work roads and the natural hydrology of the Coquille River's headwaters.