ORS § 241.155
The commission shall keep in its office an official roster of all persons holding positions under the provisions of ORS 241.016 to 241.990, and shall enter therein all appointments, promotions, demotions, transfers, reinstatements, resignations, suspensions, leaves of absence, removals and discharges, setting forth in each instance the date of commencement or termination of service, or other change, the nature of the duties performed, and the salary or compensation therefor, together with sufficient information to show why and how such appointments, or other changes, were made. The roster shall be kept so as to disclose readily to any one desiring to inspect the same all such matters in connection with each position in each department of the county government, subject to civil service, and in connection with each person employed therein.
ORS 241.155