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• Presently six main seams are recovered. They are the "H", "I", "L", "M", "Q" and "R" seams. Later, other <br />seams may be recovered. When practicable, any rider seams are also recovered. (Refer to Section 2.7.1 <br />for a more detailed discussion of the coal seams recovered.) <br />In some cases, pit dewatering of open cuts will be pertormed using portable pumps. In addition, dewa- <br />tering wells may be installed at the north end of the pit cuts or south above the pit cuts and in front of the <br />advancing active mining area. The wells are constructed no more than ten feet below the lowest mineable <br />coal seam and may be pumped prior to the beginning of actively "opening up" the area. Appropriate well <br />permits have been filed (Section 2.7.5.4) and provide Trapper the legal right to construct and pump these <br />wells. Appropriate records are kept concerning the volume of water pumped from the open pit cuts and <br />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 />3.1.4.1 Mining Secuencr: <br />Ashmore Pit Mining Area <br />Mining in Ashmore pit (F.-pit) was completed in 1999. After pertorming reclamation activities, the Queen <br />• Anne dragline walked to Ashmore East pit. Refer to the M10 series maps for a yearly detail of the mining <br />and reclamation sequences for the 2003-2007 permit term. <br />Ashmore East Pit Mining Area <br />The Queen Anne dragline has been the primary stripping machine for this area. Mining will continue to <br />advance to the east in the East Middle Flume and East Flume drainages. The dragline will finish stripping <br />in this area in 2003 and then walk to and commence stripping in Gatling pit in the Middle Flume drainage. <br />Refer to the M10 series maps for a yearly detail of the mining and reclamation sequences for the 2003- <br />2007 permit term. <br />Derringer Pit Mining Area <br />Derringer pit (D-pit), located in the No Name drainage will remain idle (temporarily abandoned) during the <br />2003-2007 permit term. It will remain open to be used as a future ash disposal site. Final reclamation in <br />Derringer Pit will occur when its ash disposal capacity is used up (in approximately 2014). See Section <br />3.5.5 for a description of temporary abandonment. <br />• <br />3-15 <br />~='S~~i.'-.iG~ii P(~K~~-~S~ - <br />