Oregon Revised Statutes Water Resources: Irrigation, Drainage, Flood Control, Reclamation § 540.740

Any person who may be injured by the action of any watermaster may appeal to the circuit court for an injunction. The injunction shall only be issued in case it can be shown at the hearing that the watermaster has failed to carry into effect the order of the Water Resources Commission or decrees of the court determining the existing rights to the use of water.