Thornton Creek Alliance (TCA) is a grassroots, nonprofit organization dedicated to preserving and restoring an ecological balance in the Thornton Creek watershed, a drainage of approximately 11.6 square miles in northeast Seattle and Shoreline.

Thornton Creek Alliance
P.O. Box 25690
Seattle, WA 98165-1190

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[gdlr_icon type="fa-envelope-o" size="16px" color="#fff"] thorntoncreekalliance@gmail.com

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