Oregon Revised Statutes Counties and County Officers § 209.130

(1) In the establishment or reestablishment of a public land survey corner, the county surveyor shall set a monument of durable quality. When a monument cannot be set at the exact corner position or it is not practicable to set a monument, then a witness corner monument shall be set.

(2) Section corners, Donation Land Claim corners, center corners and quarter-section corners shall be witnessed by at least four references. Meander corners, angle point corners or other approved public land survey corners shall be witnessed by at least two references. References shall be of durable quality. All references shall be carefully described, and their bearings and distances noted in the report or on the survey.

(3) For the purpose of providing an additional reference, the county surveyor may, when maintaining or reestablishing survey corners, establish coordinates on public land survey corners using the Oregon Coordinate System, pursuant to ORS 93.312, or another coordinate system, adopted by the appropriate public agency, that can be referenced directly to a geodetic control monument.