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-ld- V, ItI:C1,Ah41'I'!(h'J Pl;ltl~OI~WVCL' S7'ANUN11zS • A. General. These recl:cnation performance standards sVrall apply to open mining of coal, sand, gravel, c{uarry aggregate :rnd limestone used for construc- tion purposes. All operations performed corder permits issued by the Board shall be carried out in a marurer consistart with standards set fort)r in the Act and in the rules promulgated tlrcr-eundcr. B. Grading, 1. All fin;rl grading oC the area of lapel affected shall produce a gently wrdulatirrg topography or other such topography as is con- sistent with the proposed land use of the area as stated in the plan, provided, however, such grading s}rall create a topography that is r-easonahle in view of the public .interest in ph}•sically attractive surrowrdings. 2. Grading slr:rll be done in a marurer as to control erosion and siltation oC the affected area, surrounding property, and water courses, After consultation with the operator, the Board ma}• require terracing to conserve moisture and control rater erosion on all graded slopes during the process of current grading, Terraces if used may be installed in such a manner as not to {~rolribit vehicular access or revegetation procedures. Terraces shall be installed at varying intervals as determined by climatic conditions, spoil, topsoil or topsoil srilrstitute composition and texture, sloirc, steclnress, and slope lcngtlr. Suggested terrace installation intervals shall be submitted in Ure reclamation plan, 3. Plining and grading shall not affect the drainage or stream flow in a marurcr that would impair or be detrimental to existing water rights and to existing water quality. 4. Backfilling and grading of the disturbed area shall he completed as soon :rs feasible after the mining process. The operator shall establish reasonable timetables for backfilling and grading con- sisteirt with good mining procedures. 5. All debris, acid-forming materials, saline materials, toxic nuitcrials, matcr~ials constituting a fire hazard or materials not conducive to vegetation growth and establislrmcirt shall be dis- posed oC in such a manner as to prevent contamination of ground and surface ruaters, to prevent sustained combustion, mrd to pre- vent inhibition of plant growth acrd establishment. Identifica- tion of such materials shall be the responsibility of the opera- tor. 'Ibis section shall be interpreted in conformity with the rules a»d regulations of the Water Quality Control Commission and State Engineer. 6. The operator strap not use excavated areas for the deposition of foreign materials sudr as trash, industrial wastes, fly ash and