Oregon Revised Statutes Water Resources: Irrigation, Drainage, Flood Control, Reclamation § 540.621

Whenever the owner of a perfected and developed water right certifies under oath to the Water Resources Commission that the water right has been abandoned by the owner and that the owner desires cancellation thereof, the commission shall enter an order canceling the water right. Effective upon the date of the entering of such order, the water which was the subject of use under the water right shall revert to the public and become again the subject of appropriation in the manner provided by law, subject to existing priorities.