Oregon Revised Statutes Water Resources: Irrigation, Drainage, Flood Control, Reclamation § 543.270

In issuing preliminary permits, and in issuing licenses where no preliminary permit is held by an applicant for a license, preference shall be given to the application which appears to the Water Resources Commission to be best adapted to conserve and utilize the water power involved. However, any application for the use of water made by any municipal corporation of this state under any law of the state, before a preliminary permit is issued, or before a license is issued when no preliminary permit upon the proposed project has been issued, shall always have preference.