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Archaeological Investigations at Site 45-DO-214, Chief Joseph Dam Project, Washington.

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Final technical rept. Aug 78-Oct 84,

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Site 45-DO-214 is on the south bank of the Columbia River River Mile 588 near the Okanogan Highland-Columbia Plateau boundary, in an Upper Sonoran life zone. The University of Washington excavated 192.6 m3 of site volume in 1979 for the U.S. Army Corps of Engineers, Seattle District as part of a mitigation program associated with adding 10 ft to the operating pool level behind Chief Joseph Dam. Systematic, aligned random sampling with 1 x 1 x 0.1 meter collection units in 1 x 2 or 2 x 2-m cells disclosed three prehistoric components contained in slope derived colluvial deposits and later overbank deposits. Projectile point styles of the earliest component indicate a Hudnut Phase association from 4,000 to 2,000 years ago. The river then cut away much of the terrace resulting in a hiatus in the archaeological record of about 800 years. This hiatus was followed by a series of occupations dating from 1,200 to 1,000 years ago enclosed in rapidly deposited overbank sediments. The final component is relatively dated by projectile point styles to the last 1,000 years. The second and third components represent the Coyote Creek Phase. While there is no change in technological processes or kinds of functional traces through time, there is variation in economic emphasis and intensity of site use.

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  • Humanities and History

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