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Tolt Treatment Facility
Site Archaeology
According to Snoqualmie oral tradition, the Tolt Treatment Facility is in the area of a year-round village called Stuwe'yuq, which means "at the throat" and probably refers to the confluence of the North and South Forks of the Tolt River nearby. While boring monitoring wells in the backwash solids disposal area near the plant in 1998, a large archaeological site was discovered.
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The site covers at least 20 acres of river terrace. Archaeological investigations were conducted by a consultant, BOAS, Inc. Planning for the excavations was a cooperative effort between BOAS, the State of Washington, the Snoqualmie Tribe, the Tulalip Tribes, and the City of Seattle.
More than 22,000 artifacts were recovered from the site. A variety of dating techniques revealed that the site was occupied from between 7,000 and 3,000 years ago. After analysis of the artifacts are completed, they will be permanently curated at Seattle Public Utilities' new Cedar River Education Center at Rattlesnake Lake. At the Education Center, the artifacts will be preserved and used for educational and research purposes.
Related links
Cedar River Education Center
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