Wash. Const. art. XXVII, § 8

Whenever the judge of the superior court of any county, elected or appointed under the provisions of this Constitution shall have qualified the several causes then pending in the district court of the territory except such causes as would have been within the exclusive jurisdiction of the United States district court had such court existed at the time of the commencement of such causes, within such county, and the records, papers and proceedings of said district court, and the seal and other property pertaining thereto, shall pass into the jurisdiction and possession of the superior court for such county. And where the same judge is elected for two or more counties, it shall be the duty of the clerk of the district court having custody of such papers and records to transmit to the clerk of such county, or counties, other than that in which such records are kept the original papers in all cases pending in such district court and belonging to the jurisdiction of such county or counties together with transcript of so much of the records of said district court as relate to the same; and until the district courts of the Territory shall be superseded in manner aforesaid, the said district courts and the judges thereof, shall continue with the same jurisdiction and powers, to be exercised in the same judicial districts respectively, as heretofore constituted under the laws of the Territory. Whenever a quorum of the judges of the supreme court of the state shall have been elected and qualified, the causes then pending in the supreme court of the Territory, except such causes as would have been within the exclusive jurisdiction of the United States, circuit court had such court existed at the time of the commencement of such causes, and the papers, records and proceedings of said court and the seal and other property pertaining thereto, shall pass into the jurisdiction and possession of the supreme court of the state, and until so superseded, the supreme court of the Territory and the judges thereof, shall continue with like powers and jurisdiction as if this Constitution had not been adopted.