RCW 79.125.440

Any accretions that may be added to any tract or tracts of tidelands or shorelands previously sold, or that may be sold, by the state, shall belong to the state and shall not be sold, or offered for sale, unless otherwise permitted by this chapter to be sold, and unless the accretions are surveyed under the direction of the department. However, the owner of the adjacent tidelands or shorelands shall have the preference right to purchase the lands produced by accretion, when otherwise permitted by RCW 79.125.200 to be sold, for thirty days after the owner of the adjacent tidelands or shorelands shall have been notified by registered mail of the owner's preference right to purchase the accreted lands.