Oregon Revised Statutes Public Lands § 274.404

(a) The board may direct the department to make a determination of navigability if there is sufficient economic justification or if there is a broad and substantial public interest. If the board so directs, the department shall conduct a study to make the determination.

(b) The department shall provide prompt public notice to affected property owners that the department is beginning the study.

(c) Upon completion of a study directed under paragraph (a) of this subsection, the department shall prepare and submit to the board a draft report setting forth the department's findings and conclusions as to whether the waterway or part of the waterway under study is navigable and, if so, the extent of the State of Oregon's interest in the waterway or part of the waterway.

(d) The department shall provide appropriate prior public notice to affected property owners and other interested parties concerning the draft report. The notice shall provide an opportunity for a public hearing in the area of the affected waterway and an opportunity for the public to submit written comments on the draft report and to submit testimony or other evidence concerning the navigability of the affected waterway or part of the waterway or the State of Oregon's interest in the waterway or part of the waterway.

(e) Following the public hearing, the board may adopt the draft report submitted by the department if substantial evidence in the record supports the report's findings and conclusions, or the board may refer the report to the department for further action as determined by the board.