Oregon Revised Statutes Public Health and Safety § 451.445

(1) When certified copy of the findings of the Director of the Oregon Health Authority is filed with the county court as provided by ORS 431.740 or 431.750, the county court shall, subject to ORS 198.792, proceed to form the district to provide the facilities described in the findings and shall enter an order in accordance with ORS 451.485.

(2) The county court shall, within one year after making its order under ORS 451.485, prepare plans and specifications for the service facilities proposed to be provided within the district and proceed in accordance with the time schedule to construct or install the facilities.

(3) Notwithstanding the provisions of ORS 451.487, the order of the county court under ORS 451.485 is not subject to referendum if it is adopted in accordance with subsection (1) of this section and as a result of proceedings conducted under ORS 431.705 to 431.760.

(4) Notwithstanding ORS 451.495, when service facilities are to be constructed for the purpose of removing or alleviating a danger to public health and as a result of proceedings conducted by ORS 431.705 to 431.760, if any portion of the cost of the service facilities is to be assessed against the property directly benefited, ORS 451.495 (1)(c) does not apply to the general ordinance providing for the method of assessment which must be adopted under ORS 451.495.