Okla. Stat. tit. 45, § 45-745.20: Disposal of wastes

The operator shall, with respect to surface disposal of mine

wastes, tailings, coal processing wastes, and other wastes in areas

other than the mine working or excavations, stabilize all waste

piles in designated areas through construction in compacted layers

including the use of incombustible and impervious materials if

necessary. He shall also assure that the final contour of the waste

pile will be compatible with natural surroundings and that the site

can and will be stabilized and revegetated according to the

provisions of this act.