Oregon Revised Statutes Highways, Roads, Bridges and Ferries § 371.630

(1) If the engineer makes a favorable report on the proposed improvement, the county court shall mail to the owner of each parcel of land to be assessed for the proposed improvement a written notice of the favorable report, the estimated cost of the improvement and the estimated amount of the assessment against the land of the owner. The notice shall require the owner to file with the county court within 20 days after the mailing of the notice, a written objection, if any, to the further prosecution of the improvement.

(2) If objections are received by the county court signed by more than 50 percent of the owners of land representing more than 50 percent of the total amount of the assessment for the proposed improvement, the proposed improvement shall, by order of the court, be declared abandoned and no new petition may be filed and no new resolution may be adopted for the improvement within a period of one year after the date of the order.