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<br />~ ~ III IIIIIIIIIIIII III <br />STATE OF COLORADO <br />DIVISION OF MINERALS AND GEOLOGY <br />Department of Natural Resources <br />1313 Sherman St., Room 215 <br />Denver, CO 80203 <br />Phone: (30]) 8663567 <br />FAX: (303)832-8106 <br />March 3, 1995 <br />Mr. Robert W. Hill <br />DGMC <br />P.O. Box 268 Route 1 <br />Waltonville, Illinois 62894 <br />RE: Remaining adequacy comments, bond calculation, <br />Incas Mine Amendment No. AM-002, Permit No. M-86-076 <br />Dear Mr. Aill: <br />Roy Romer <br />Governor <br />Michael B. Long <br />Division Director <br />I have enclosed a series of bond calculations for the phased mining <br />and reclamation plan proposed in the above referenced amendment. <br />The phases were grouped into 2-year sets; bond amount totals for <br />each 2-year phase are as follows: <br />Years 1995-1996...$ 40,358.00 (current amount held by DMG) <br />Years 1997-1998...$ 48,939.00 <br />Years 1999-2000...$ 64,606.00 <br />Years 2001-2002...$ 80,364.00 <br />Years 2003-2004...$ 82,048.00 <br />The amounts shown above include estimated costs for neutralizing <br />any residual cyanide remaining in the milling circuits (see tasks <br />15b thru 15e). By virtue of the amounts shown above, additional <br />bond monies will need to be provided to the Division immediately <br />prior to the start of construction of the processing plant, shop <br />and lab buildings. <br />Remaining Adequacy Issues: <br />Please indicate the source of topsoil material for reclamation of <br />the processing plant area, and an approximate location of the <br />stockpile. Also, please indicate whether a crushed rock/gravel <br />stockpile will be developed for subsequent use in reclaiming the <br />talus slope area. <br />Please revise the cross-sections of the surface mining area to show <br />the anticipated reclaimed configuration of the regraded pit area, <br />extending from the crest of the highwall to the toe of the <br />temporary fills situated downslope from the pit. <br />Tom Schreiner of our Denver Office has recently requested .(copy of <br />memo attached) information regarding engineering designs and <br />construction techniques for installation of diversion ditches <br />associated with tailings disposal areas. Although Mr. Schreiner is <br />apparently unaware that the existing mine access road is or will be <br />graded such that all stormwater runoff will be directed down the <br />road and away from the face of the disposal area, the Division <br />IJi~Ot4V~~ ~~; oF~co~~ <br />~1+~~f~~ ;`" <br />~ ~B l6 ~ <br />