Wash. Rev. Code § 79.120.040
If the United States government has established pierhead lines within a waterway created under the laws of this state at any distance from the boundaries established by the state, structures may be constructed in that strip of waterway between the waterway boundary and the nearest pierhead line only with the consent of the department and upon such plans, terms, and conditions and for such term as determined by the department. However, no permit shall extend for a period longer than thirty years.
The department may cancel any permit upon sixty days' notice for a substantial breach by the permittee of any of the permit conditions.
If a waterway is within the territorial limits of a port district, the duties assigned by this section to the department may be exercised by the port commission of the port district as provided in RCW 79.105.420.
Nothing in this section shall confer upon, create, or recognize in any abutting owner any right or privilege in or to any strip of waterway abutting any street and between prolongations of the lines of the street, but the control of and the right to use the strip is reserved to the state of Washington, except as authorized by RCW 79.105.420.
RCW 79.120.040
Effective date-1984 c 221: See RCW 79.105.902.
Application to existing property rights: RCW 79.105.040.