Water Code § 2750

As soon as practicable after adoption of the order of determination, issuance of an order on reconsideration, or issuance of an order denying reconsideration, whichever is later, a certified copy of the order, together with the original evidence and transcript of testimony filed with or taken before the board and certified by it, shall be filed with the clerk of the superior court of the county in which the stream system, or some part thereof, is situated.