Areas disturbed after January 1, 1972 by the operation shall be reclaimed by contouring, except terracing may be utilized if the operator demonstrates that operation has extracted quantities of minerals so that contouring cannot be achieved with the remaining overburden and waste material. Other alternatives to contouring or terracing may be approved under section 7(c)(2)(ii) or (iii) of the act (52 P. S. § 3307(c)(2)(ii) or (iii)).
25 Pa. Code § 77.591