The following excerpt is from Puyallup Indian Tribe v. Port of Tacoma, 717 F.2d 1251 (9th Cir. 1983):
When the course of the stream changes, the boundary line may or may not shift with the stream. If the change is slow and imperceptible so that it may be classified as accretion or reliction, the boundary line shifts. If, however, the change of the stream is avulsive, the original boundary line remains.
Parker v. Farrell, 74 Wash.2d 553, 554-55, 445 P.2d 620, 622 (1968) (footnote omitted).
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