ORS § 169.180
All convicts sentenced by any court or legal authority in any city, whether in default of the payment of a fine or committed for a definite number of days to serve sentence in any local correctional facility, during the period of the sentence shall, with the consent of the proper city authorities and for the purposes of ORS 169.120 and 169.170 to 169.210, be under the absolute and exclusive control of the county court or board of county commissioners of the county in which said city is located. Such city convicts shall be delivered to the county court by any officer having custody thereof in the same manner as county prisoners, and may be returned to the officer from whom they are received in the same manner, and shall be subject to the same rules and regulations as provided in ORS 169.170 for county prisoners.
ORS 169.180