The superintendent, subject to the direction and approval of the secretary shall:
(1) Have general supervision and control of the grounds and buildings of the institution, the subordinate officers and employees, and the inmates thereof, and all matters relating to their government and discipline;
(2) Make such rules, regulations, and orders, not inconsistent with law or with the rules, regulations, or directions of the secretary, as may seem to him or her proper or necessary for the government of such institution and for the employment, discipline, and education of the inmates, except for the program of education provided pursuant to RCW 28A.190.030 through 28A.190.050 which shall be governed by the school district conducting the program;
(3) Exercise such other powers, and perform such other duties as the secretary may prescribe.