Oregon Revised Statutes Public Organizations for Community Service § 262.105

All property, real and personal, owned, used, operated or controlled by a joint operating agency for the transmission, production or furnishing of electric power or energy shall be assessed and taxed in the same manner and for the same purposes as similar property owned, used, operated or controlled by private corporations, other than electric cooperatives, for the purpose of furnishing electric power or energy to the public. The joint operating agency and its directors and officers shall be subject to the same requirements as are provided by law in respect to such assessment and taxation. All taxes so levied shall be payable by the joint operating agency out of its revenues as an expense of its operation.