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<br />Mountain Coal Company <br />West Elk Mine <br />Post Office Baa 591 <br />Somerset, Colorado 81434 <br />Teleptwne 303 929-5015 <br />Fax 303 929-5595 <br />October 20, 1994 <br />Ms. Christine E. Johnston <br />DIVISION OF MINERALS AND GEOLOGY <br />Office of Mined Land Reclamation <br />1313 Sherman Street, Room 215 <br />Denver, CO 80203 <br />Clli Ulf <br />~~h~l . <br />pct^,FI~/~{J <br />OCT ? 1 1994 <br />iii iiiiiiiiiiiii iii <br />999 <br />/~ <br />Division ~, ,.,~,~~,F~. _ ..."I°6Y <br />Re: West Elk Mine, Permit No. C-80-007, Technical Revision No. 73, Lone Pine Gulch <br />Portals and Slopes Development Waste Pile <br />Dear Christine: <br />Mountain Coal Company (MCC) provides the following responses to the Division's concerns on <br />technical revision No. 73 for a development waste rock pile, per your letter of October 13, 1994. <br />DESIGN AND CONSTRUCTION <br />OIvV ~1. Certified copies of the designs are attached. <br />a~LV 2. No springs, natural or man-made water courses orwet-weather seeps are known to <br />exist in the disposal area. <br />~bN ~I 3. Attached are laboratory analyses of the samples from the borings completed earlier this <br />year form the horizons which may be placed in the pile. None are believed to be acid-forming or <br />toxic materials. <br />~F~° 4. Native rock (sandstone) from the fan bench cut that could be salvaged has been set <br />aside for the underdrain. Should additional rock be needed, screened river rock (granite-type) <br />from a Paonia area quarry will likely be utilized. <br />5. The underdrain has been redesigned to be setback five feet inside the pile from the up- <br />gradient end <br />addition to the topsoil. ~ ~ ,~ F wjyV+ a~ ~. i ,1.:~ {~ ~~ - yy, , ~ Zil.i//Z ~'I r%L+G1AI ~ ~D r <br />~~~2. The pile will be permanent and will be reclaimed after placement of all of the F r~,.i ~ <br />development waste material generated from the Lone Pine Gulch fan entries. ~~~ ~~, ~ , , <br />fa~-~~ dv~i~,~ 365~'~ <br />RECLAMATION l` ,~:'' ~`~",~~i~ `~ 5 ; ^•;~ <br />~~; I' ~iSvi ~ _ <br />1. Subsoil from the staging area will be utilized for cover on~[he development waste in <br />~ d~ItiJd~lOv1 ;iA~~d6/c r? <br />