Oregon Revised Statutes Water Resources: Irrigation, Drainage, Flood Control, Reclamation § 548.110

(1) The proceedings under ORS 548.105 shall be in the nature of a proceeding in rem. The practice and procedure therein shall follow the practice and procedure of an action not triable by right to a jury, so far as they are consistent with the determination sought to be obtained, except as otherwise provided in ORS 548.105 to 548.115. The jurisdiction of the irrigation district or drainage district and of all the freeholders, assessment payers and legal voters therein shall be obtained by publication of notice directed to the district, and to “all freeholders, legal voters and assessment payers within the district,” without naming them individually. The notice shall be served on all parties in interest by publication for at least once a week for three successive weeks in some newspaper of general circulation published in the county where the proceeding is pending. Jurisdiction shall be complete within 10 days after full publication.

(2) Any person interested may at any time before the expiration of the 10 days appear and contest the validity of the proceeding, or of any of the acts or things therein enumerated. The proceedings shall be speedily tried and judgment rendered declaring the matter so contested to be either valid or invalid. Any order or judgment in the course of the proceeding may be made and rendered by the judge of the court in vacation. For the purpose of any such order or judgment, the court shall be deemed at all times to be in session, and the act of the judge in making such order or judgment shall be the act of the court.

(3) Any party may appeal to the Court of Appeals at any time within 30 days after rendition of the judgment. The appeal must be heard and determined within three months from the time of taking the appeal.

(4) The court, in inquiring into the regularity, legality or correctness of any of the proceedings, must disregard any error, irregularity or omission which does not affect the substantial rights of the parties to the court proceedings, and may approve the proceedings in part and disapprove and declare invalid other or subsequent proceedings in part. The costs of the court proceedings may be allowed and apportioned between the parties in the discretion of the court.