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<br />TRAPPER ~ININC INC. <br />November 26, 1991 <br />CERTIFIED #P782939284 <br />Mr. Kent Gorham <br />Colorado Mined Land Reclamation Division <br />215 Centennial Bldg. <br />1313 Sherman St <br />Denver, CO 80203 <br />Dear Kent: <br />RE: Technical Revision 58 <br />Expansion of the long term utility ash disposal area in Ashmore Pit <br />Trapper Mine intends to expand our current long term utility ash disposal area in Ashmore pit to <br />accomodate ash disposal in pit cuts within the Middle Pyeatt drainage (cuts 77 through 83). Trapper's <br />utilization of these pit cuts for utility waste disposal would extend the life of our current ash disposal area <br />and allow for a centralization of minewide waste within a specific area. Trapper is approved to dispose of <br />utility waste and other waste in other pits ('I'R-35 and 45), however to date all waste has been disposed of in <br />the Ashmore pit area. <br />Current mining sequencing and the projected advancement for eastern A pit would permit concentrated and <br />cost effective ash disposal immediatety adjacent to the existing approved long term sites. An area <br />approximately 84 acres in size is proposed for expansion. Maps 47 and 47a are revised to depict the <br />proposed utility waste expansion area. <br />Groundwater monitoring site GMP-1 (see Map M52 and permit page 4-247d) was established in September <br />1990 to gather baseline water data in advance of ash disposal in this area. Quar[erty and yearly water quality <br />sampling will continue at GMP-1 as specified in our mining and reclamation permit Additionally <br />appropriate surface water quality control is in place via three sediment control ponds within the Middle <br />Pyeatt drainage. All utility ash shall be disposed as specified in Section 4.3.4.5 of our mining and <br />reclamation permit. The critical pit crest elevation for this new area is 6626 (ft MSL). All utility waste will <br />be disposed at least 10 feet above this elevation. Enclosed is updated permit pages 4-98b and 4-100 and an <br />additional permit page (4-99e) showing across-section depicting "no utility waste disposal zone" in Ashmore <br />pit (Middle Pyeat[ drainage) from profde E-E' on map M47a. <br />Kent, if you have any questions or concerns, please contact me <br />Sincerely, <br />~~~ <br />William Agnew <br />Sr. Environmental Engineer <br />WSH/WNb <br />[CMLRD\~OV?bJ <br />Enclosure <br />G.M. Srubble reld <br />F.A Rowley <br />RD. Herring <br />W.S. Harding <br />f le <br />P.O. Box 187 Craig, Colorado 81626 (303) 824-4401 <br />