Wash. Rev. Code § 87.03.680
If at any such election a majority of all the votes cast shall be against exclusion the board shall deny and dismiss said petition and proceed no further in said matter; but if in the case of a petition for the exclusion of lands from a district a majority of such votes be in favor of the exclusion of said lands from the district, the board shall thereupon order that the said lands mentioned in said resolution be excluded from the district; if in the case of a petition for the exclusion of a former district from a consolidated district, a majority of the votes cast in such former district shall be against exclusion, or a majority of the votes cast in the remaining portion of the consolidated district shall be against exclusion, the board shall deny and dismiss the petition and proceed no further in the matter; but if in the case of a petition for such exclusion of a former district a majority of the votes cast in such former district and a majority of the votes cast in the remaining portion of the consolidated district shall be in favor of the exclusion of such former district, the board shall thereupon order that the lands comprising such former district be excluded from the consolidated district and that such former district shall be and is reestablished as an irrigation district created and established under the provision of this chapter and that the title to all property formerly belonging to, and all property within the boundaries of said former district, shall be and is vested in such reestablished district, and shall call an election to be held in such reestablished district for the election of a board of directors thereof, and direct the publication of notices of such election in the manner provided in this chapter for the publication of notice of special elections. The board entering such order shall continue to administer the affairs of such reestablished district until the directors elected at such election shall have qualified.
The said order excluding land from a district shall describe the boundaries of the lands excluded, should the exclusion change the boundaries of the district, and in case of the exclusion of a former district from a consolidated district, shall describe the boundaries of the reestablished district and the boundaries of the district remaining; and for that purpose the board may cause a survey to be made of such portions of the boundaries as the board may deem necessary.
RCW 87.03.680