Oregon Revised Statutes Water Resources: Irrigation, Drainage, Flood Control, Reclamation § 547.315

(1) At the time of the construction in any district of the plan for reclamation, all ditches or systems of drainage already constructed in the district and all watercourses shall, if necessary to the drainage of any lands in the district, be connected with and made a part of the works and improvements of the plan of drainage of the district. But no ditches, drains or systems of drainage constructed in the district shall be connected therewith, unless the consent of the board of supervisors is first obtained. This consent shall be in writing and shall particularly describe the method, terms and conditions of such connection, and shall be approved by the chief engineer. The connections, if made, shall be in strict accord with the method, terms and conditions laid down in the consent.

(2) If the landowners wishing to make such connection are refused by the board of supervisors or decline to accept the consent granted, such owners may file a petition for such connection in the circuit court having jurisdiction in the district, and the matter in dispute shall in a summary manner be decided by the court, whose decision shall be final and binding on the district and landowners.

(3) No connection with the works or improvements of the plan of drainage of the district or with any ditch, drain or artificial drainage wholly within the district shall be made, caused or effected by any landowner, company or corporation, municipal or private, by means of or with any ditch, drain, cut, fill, roadbed, levee, embankment or artificial drainage wholly without the limits of the district, unless such connection is consented to by the board of supervisors, or in the manner hereinbefore provided.