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• 3 .5.5 Final Highwalls <br />Final highwalls are exposed during the last cut of a particular pit. The extent of each highwall is com- <br />pletely dependent upon the extent and, depth of the coal seam being recovered. Two final cuts are <br />anticipated during the permit term,' one in Flintlock pit and one in Z dip pit. Final highwalls will be <br />fragmented and regraded to approximate original contour as shown on the Postmining Topography Map, <br />Map M12. The final cut area where Derringer and Enfield pits come together will be utilized as a future <br />long-term ash disposal site. This will aid in establishing the post-mining configuration. <br />Map M55 shows the area of disturbance to be left during the temporary abandonment of Enfield Pit. As <br />shown, a maximum of 82 acres of graded but not topsoiled spoils, 36 acres of open pit and 22 acres of <br />prestripped area was left. The open pit was "cast blast" to further stabilize the area. The size of unre- <br />claimed area in Enfield Pit allows Trapper to remain within bond and sediment storage volume con- <br />straints until D pit is complete. <br />During the interim while loth pits remain open, the E Pit highwall will be managed so as not to endanger <br />men or machinery. There is no evidence that highwalls present any added hazards to wildlife in or adja- <br />cent to the mine plan area. <br />LJ <br />r 1 <br />LJ <br />3-45 <br />/!,pprove-r.