Reclamation setbacks shall be as follows unless waived by the department:
(1) The reclamation setback for unconsolidated deposits within mines permitted after June 30, 1993, shall be equal to the maximum anticipated height of the adjacent working face or as determined by the department. Setbacks and buffers may be destroyed as part of final reclamation of each segment if approved by the department.
(2) The minimum reclamation setback for consolidated materials within mines permitted after June 30, 1993, shall be thirty feet or as determined by the department.
(3) An exemption from this section may be granted by the department following a written request. The department may consider submission of a plan for backfilling acceptable to the department, a geotechnical slope-stability study, proof of a dedicated source of fill materials, written approval of contiguous landowners, and other information before granting an exemption.