Section 225 ILCS 720/4.05 - Wastes(a) With respect to surface disposal of mine wastes, tailings, coal processing wastes, and other wastes in areas other than the mine workings or excavations, all waste piles created by the permittee from current underground mining operations shall be stabilized through construction in compacted layers including the use of noncombustible and impervious materials if necessary. The operator shall assure that the leachate will not degrade surface or ground waters below water quality standards established pursuant to applicable Federal and State law, that the final contour of the waste accumulation will be compatible with natural surroundings, and that the site is stabilized and revegetated according to the provisions of this Article.(b) The operator shall design, locate, construct, operate, maintain, enlarge, modify, and remove, or abandon, in accordance with the standards and criteria developed under this Act, all existing and new coal mine waste piles consisting of mine wastes, tailings, coal processing wastes, or other liquid and solid wastes and used either temporarily or permanently as dams or embankments.