Mealey's ( December 3, 2021, 2:51 PM EST) -- OLYMPIA, Wash. — The Washington Supreme Court on Nov. 18 affirmed in part and reversed in part a state superior court’s adjudication of certain water rights in the Yakima River Drainage Basin, including those of a Native American tribe whose rights are spelled out in an 1855 treaty (In the Matter of the Determination of the Rights to Use the Surface Waters of the Yakima River Drainage Basin, et al....