N.C. Gen. Stat. § 74-57

If at any time it appears to the Department from its inspection of the affected land that the activities under the reclamation plan and other terms and conditions of the permit are failing to achieve the purposes and requirements of this Article, it shall give the operator written notice of that fact, of its intention to modify the reclamation plan and other terms and conditions of the permit in a stated manner, and of the operator's right to a hearing on the proposed modification at a stated time and place. The date for such hearing shall be not less than 30 nor more than 60 days after the date of the notice unless the Department and the operator shall mutually agree on another date. Following the hearing the Department shall have the right to modify the reclamation plan and other terms and conditions of the permit in the manner stated in the notice or in such other manner as it deems appropriate in view of the evidence submitted at the hearing.