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• -2- If the applicant addresses the overburden stockpile material volume question and surveys the area as stated the plan will be adequate. However, in the event that substantial differential settling occurs in the backfilled area due to insufficient compaction effort or grading technique, isolated areas may need additional future reclamation. With further regard to the portal pit area it is advised that the Division determine the water quality that will discharge into the pit. This quality could be determined as part of a field inspection prior to backfilling. Temperature, pH and electroconductivity measurements should be taken. In addition, it is advised to inquire if the operator has data the will determine ground water gradients toward the pit and also water quality. This would include samples or data from pit sump discharge waters and from the wells drilled above and to the west of the portal pit area. Calculations pertaining to portal pit area: BB' Area = 65 x 370 = 12,025 ft2 2 CC' Area = 135 x 550 = 37,125 ft2 2 Volume = (0 + 12.025) x 380 + (12.025 + 37.125) ( 2 ) ( 2 ) + 37.125 + 0 x 200 = 30,572,250 ft3 2 = 1,132,305 BCY Compares to CYCC's 1,128,000 BCY calculation OK/pcs Note: No cross sections of stockpiles to verify LCY 13. Surface Mine Area x 1,000 See Maps No. 11 and No. The applicant proposes to surface mine in a 16.2 acre area approximately 1 mile south-southwest of the CYCC Middle Creek office. The area strip mining method will be utilized. A temporary overburden stockpile will be developed from the first cut, coal will be removed and stockpiled dust north of this temporary overburden stockpile. Contemporaneous reclamation will occur in the subsequent cuts (see Map No. 10). For the final mine plan and reclamation the temporary overburden stockpile will be used as backftll for the final grading.