“Idle” means that an operator of a surface mining operation has curtailed production at the surface mining operation, with the intent to resume the surface mining operation at a future date, for a period of one year or more by more than ninety (90%) percent of its maximum annual mineral production within any of the last five (5) years during which an interim management plan has not been approved. (§ 1, Ord. 1191, eff. September 5, 1996; as amended by Ord. 1518, eff. February 13, 2020)