Oregon Revised Statutes Water Resources: Irrigation, Drainage, Flood Control, Reclamation § 545.279

(1) The board of directors may require a water user of the district:

(2) When practicable, water control devices and measuring devices under this section shall be constructed on property for which the district holds existing easements.

(3) Except when an emergency requires the immediate installation of a water control device to avoid loss of water, the board shall notify a water user in writing that the water user is required by the board under this section to install a water control device or a measuring device. The notice shall be delivered personally or mailed by registered or certified mail, return receipt requested, to the water user. Within the 20-day period immediately following the date of personal delivery or mailing of the notice or at any time before the date of the next regular meeting of the board, the water user may file with the secretary of the board a written objection to the requirement for installation of the device and request a hearing before the board. After the hearing, the board may affirm, amend or rescind its order to the water user for installation of a water control device or measuring device. The decision of the board shall be final.