Oregon Revised Statutes Public Health and Safety § 450.722

(1) When formation of a water authority or a sanitary authority is proposed, the petition or resolution for formation under ORS 198.705 to 198.955 or the resolution or order for formation under ORS 450.600 to 450.989 may include, in addition to the information required under ORS 198.705 to 198.955 and 450.600 to 450.989, a declaration that some or all of the existing water, sanitary or drainage districts located entirely within the proposed water authority or sanitary authority shall be dissolved upon formation of the authority.

(2) Upon formation of a water authority or a sanitary authority, the districts declared to be dissolved in the petition, resolution or order for formation, either as originally filed or as amended by a local government boundary commission or by a county governing body, are extinguished upon the effective date of the formation of the water authority or the sanitary authority. On the effective date of such formation, the water authority or sanitary authority succeeds to all the assets and becomes charged with all the liabilities, obligations and functions of the districts. The district officers shall forthwith deliver to the water authority or sanitary authority the district assets and records. Uncollected taxes theretofore levied by such districts shall become the property of the water authority or the sanitary authority and be delivered to it by the county treasurer upon collection.