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1980 Map of Trefry Canyon

Name: 1980 Topographic Map of Trefry Canyon
Creator: U.S. Geological Survey
Published: 1981
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1981

About this map

The Columbia River carves a dramatic bend through this portion of Washington, where the Colville Indian Reservation boundary follows the mid-channel of Rufus Woods Lake. The terrain is characterized by a series of high plateaus and deep drainage cuts, most notably Trefry Canyon and Henderson Canyon. To the east, the small settlement of Del Rio and the Delrio Grange Hall represent the area's agricultural hub, surrounded by family-named landmarks like Pike Spring and Brazel Spring.

Surveyors identified numerous natural springs and distinctive geological formations, including Jackass Butte and the sheer Castle Rock. Evidence of early habitation and land use is found in labels for a grave near Negro Spring and several remote wells. The riverfront features Allen Bar and Sellers Eddy, providing specific coordinates for researchers tracing the history of river navigation and shoreline settlement before later 20th-century water management changes.