ORS 87.364: Attachment of liens.

(1) The liens created by ORS 87.352 to 87.358 attach to the land, mine or improvement described in those sections on the day on which the lien claimant ceases to perform the labor or transport or furnish the materials or provisions for which the lien is claimed.

      (2) The lien created by ORS 87.362, attaches to the land described in that section on the day of the first delivery of electricity for which the lien is claimed.