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<br />RECEIVED <br />N 0 4 2010 <br />To: Berhan I?effelew, DRMS <br />From: Mike Ellis, CC&V <br />Memorandum <br />Division of Reclamatlon, <br />Mining & Safety <br />Date: 12-28-09 <br />sect: Back-up Information for TR 55 - Revised Backfill Plan Financial <br />Warranty Justification <br />You requested that I send along some back-up information for your files with respect to <br />the financial warranty determination we made for the revised backfilling plan. Attached <br />are a couple of "sketch-maps" that show the Amendment 9 post-mining topo compared <br />with the new revised backfill and how it affects the post-mining topo. You can see from <br />these comparison "sketch-maps" there is no need to increase the financial warranty due to <br />the following: <br />• Squaw Overburden Storage Area is 105 ft. lower under the new plan compared to <br />the Am. #9 post-mining topo, resulting in significantly less work to be done to <br />accomplish final grading. <br />• Less grading will also be required in East Cresson (Altman) due to filling higher <br />on the slopes around the "10,775 Knob". <br />• The north side of the Main Cresson Pit will have 2.5H to IV slopes versus 2H to <br />IV slopes in Am. #9, and the overburden placement will be done so as to <br />facilitate much easier revegetation, thereby reducing costs. <br />• There will be no change to any of the other mine areas with respect to backfilling <br />(i.e., Wildhorse Extension, Globe Hill, or Schist Island). <br />I trust this information will be sufficient to meet your needs. Please call me at 719-689- <br />4056 if you have any questions. <br />Attachments: Sketch Maps of Am. 9 and Revised Backfill Post-Mining Topography