Oregon Revised Statutes Water Resources: Irrigation, Drainage, Flood Control, Reclamation § 537.142

(1) No water right certificate or permit is required for the use of the surface waters of this state if the water is to be used for a salmon and trout enhancement project certified by the State Department of Fish and Wildlife under ORS 496.430 to 496.460.

(2) The use of water for a salmon and trout enhancement project under subsection (1) of this section is a beneficial use and such use shall be allowed on all the waters of this state, whether or not the project is located on waters of this state for which the use is restricted pursuant to any of the following:

(3) If the use of the waters of this state under subsection (1) of this section conflicts with the use of water under a permit issued under ORS 537.240 or a use allowed under a water right certificate issued under ORS 537.250, the use permitted under subsection (1) of this section shall be subordinate.