Oregon Revised Statutes Water Resources: Irrigation, Drainage, Flood Control, Reclamation § 545.237

(1) The board of directors, its officers or an agent or employee of the board of directors may enter upon land of a water user of the district for inspection, maintenance and regulation of ditches, pipelines, gates, pumps or other water works. In the absence of an emergency, the district shall provide adequate and appropriate notice prior to entering upon the land of the water user.

(2) Any person exercising the right of entry granted under this section shall not cause unnecessary damage to the property of the water user. The landowner shall not be responsible to the person or the district for any injury or damage to the person or district arising out of or occurring by reason of the entry, except when the landowner intentionally causes injury or damage to the person or district.

(3) The right of entry granted by this section shall not constitute a right of entry by the public onto the premises of the landowner.