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1990 Map of Callahan

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

USGS Topo · Published 1990

About this map

Callahan occupies a small clearing within a heavily dissected timber landscape in Douglas County, where the southern portion of the sheet reveals the Britt Nichols County Park. The terrain is defined by prominent north-south elevations such as Rattlesnake Ridge and the aptly named Bear Ridge, with dozens of drainages including Buffalo Creek and Camp Creek carving deep into the volcanic upland.

Resource extraction and utility infrastructure are scattered throughout this industrial forest land, notably at several Quarry sites and a remote Substation near Coles Valley. The presence of a Lookout Tower on a high peak underscores the vital role of fire surveillance in this densely wooded region. Water management is evident through features like Grier Reservoir and Hawkins Lake, which support the drainage network feeding into Mill Creek at the map's northern edge.