Washington Revised Code Title 90. Water Rights--Environment § 90.03.030. Right to convey water along lake or stream--Conveyance to intake structure in neighboring state

Any person may convey any water which he or she may have a right to use along any of the natural streams or lakes of this state, but not so as to raise the water thereof above ordinary highwater mark, without making just compensation to persons injured thereby; but due allowance shall be made for evaporation and seepage, the amount of such seepage to be determined by the department, upon the application of any person interested. Water conveyed under this section may be conveyed to an approved intake structure located in a neighboring state in order to accomplish an approved modification of the point of diversion in a permit to appropriate water for a beneficial use, if approval of the neighboring state is documented to the satisfaction of the department.