Wash. Rev. Code § 79.125.230
Second-class tidelands and shorelands that are separated from the upland by navigable waters shall be sold, when otherwise permitted under RCW 79.125.200 to be sold, but in no case at less than five dollars per acre. An applicant to purchase the tidelands or shorelands shall, at the applicant's own expense, survey and file with the application a plat of the surveys of the land applied for, which survey shall be connected with, and the plat shall show, two or more connections with the United States survey of the uplands, and the applicant shall file the field notes of the survey of the land with the application. The department shall examine and test the plat and field notes of the survey, and if found incorrect or indefinite, it shall cause the survey to be corrected or may reject the survey and cause a new survey to be made.
RCW 79.125.230