Oregon Revised Statutes Water Resources: Irrigation, Drainage, Flood Control, Reclamation § 537.248

(1) When the Water Resources Department issues a reservoir permit for a new storage project to a county, municipality or district, the department shall include in the permit a date, not more than 10 years after the date the permit is issued, to begin and complete construction of diversion or storage works and to perfect the water right. An application for a reservoir permit under this section shall be subject to the provisions of ORS 537.140 to 537.211, except that the applicant need not submit engineering plans and specifications before the permit is issued. However, the applicant may not begin construction of the reservoir until the department approves the engineering plans and specifications.

(2) By order, the Water Resources Director may extend the date for beginning and completing construction and for completing perfection of the use if the applicant shows reasonable diligence and good cause. An extension allowed under this subsection shall not exceed 10 years, but the applicant may request additional extensions.

(3) As used in this section, “district” includes the entities set forth in ORS 198.010 and 198.180.