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• Presently six main seams are recovered. They are the "H", "I", "K", "L", "M" and "Q" seams. Later, other <br />seams may be 'recovered. When practicable, any rider seams are also recovered. (Refer to Section <br />2:7.1 for a more detailed discussion of the coal seams recovered.) <br />In some cases, pit dewatering of open cuts will be performed using portable pumps. In addition, dewa- <br />te'ring wells may be installed at the north end of the pit cuts or south above the pit cuts and in front of the <br />atlvancing active mining area. The wells are constructed no more than ten feet below the lowest <br />rr;ineable coal seam and may be pumped prior to the beginning of actively "opening up" the area. <br />Appropriate well permits have been filed (Section 2.7.5.4) and provide Trapper the legal right to <br />construct and pump these wells. Appropriate records are kept concerning the volume of water pumped <br />from the open pit cuts and drilled wells. <br />The mining methods employed at the Trapper Mine effectively conserve and utilize the coal resource. <br />Coal is recovered to the maximum depth that present equipment and economic limits will allow. This <br />endeavor minimizes the possibility of remining the area by surface methods and results in a program that <br />maximizes coal recovery and minimizes surface disturbance. <br />3'.11.4.11 Mining Sequence <br />Ashmore Pit Mining Area <br />I <br />Mining in Ashmore pit (A-pit) was completed in 1999. After performing reclamation activities, the Queen <br />Anne dragline walked to Ashmore East pit. Refer to the M10 series maps for a yearly detail of the <br />mining and reclamation sequences for the 2008-2012 permit term. <br />Queen Anne dragline was the primary stripping machine for this area until 2003. The Baby Doe <br />ine conducted stripping in this area in 2006 and early 2007. Further advance of this pit will occur <br />ig the 2008-2012 permit term Refer to the M10 series maps for a yearly detail of the mining and <br />imation sequences for the 2008-2012 permit term. <br />Derringer/Enfield Pit Minina Area <br />With the exception of developing a small dozer pit on the north end of this pit, Derringer/Enfield pit (DIE- <br />PI it), located in the No Name drainage will remain idle (temporarily abandoned) during the 2008-2012 <br />permit term. It will remain open to be used as a future ash disposal site. Final reclamation in <br />Derringer/Enfield Pit will occur when its ash disposal capacity is used up (sometime after the 2008-2012 <br />permit term). See Section 3.5.5 for a description of temporary abandonment. <br />revision. P z <br />3-15 <br />,approved: ? z( 0