Oregon Revised Statutes Counties and County Officers § 209.015

(1) Subject to subsection (3) of this section, the county surveyor, and employees and agents of the county surveyor, may enter upon any land for the purpose of surveying or performing any work necessary to carry out existing laws and may establish permanent survey monuments.

(2) Any person exercising the right of entry granted under subsection (1) of this section shall do so with no unnecessary damage to the land entered upon.

(3) A county surveyor or any employee or agent of the county surveyor shall not enter upon or establish any permanent survey monument upon any property without first providing notice to the landowner or landowners and the occupant of the property.