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D <br />Grand Mesa <br />Coal Company <br />Catherine li. Bege,i <br />Plined Land Reclamation Division <br />923 Centennial Building <br />1313 Sherman Street <br />Denver, CO 80'L03-2213 <br />Re: Remaininfi Adequacy Review Issues <br />Permit No. C-81-039 <br />Dear Catherine: <br /> <br />P. O. Box 1351 <br />Palisade, CO 81526 <br />(303) 464-7951 <br />"la}• 13, 1988 <br />~~iAl' ? ~i 1928 <br />The followinfi discussion responds to the Division's remaining <br />adequacy review issues and also supplies information required to <br />complete Four evaluation of the required bond amount. <br />Geology - Rules 2.04.5 and 2.04.6 <br />Q. Ic'hat is the geochemistry of the material being used for non- <br />toxic cover at the refuse pile' Section 2.09.9 lists the <br />geochemistry of two samples, 0-6 and 0-~, but these c:ere <br />sampled form only the top four inches. Propose a sampling <br />program c:hich would produce representative samples of the <br />material per 9.06.2(41 and a schedule for acquiring and sub- <br />mittin~ this information. <br />A. 1"our letter to GMCC dated April 21, 1988 transmitted the <br />Division's guidelines on overburden sampling. Three samples <br />c.~ere taken along the outslope of the old strip pit spoil <br />area. The samples were taken in the 0' to 3' depth range. <br />The samples have been analyzed in accordance c:ith the <br />Division's guidelines and the results of those tests are <br />enclosed. <br />Surface Water Hydrology - Rules 2.09.5, 2.04.7, <br />2.05.3(4, 2.05.6(31 and 4.05 <br />Q. Hoc: many rears of data were used to compile Table <br />2.09.7(2)(al(b)-1. If the historic extent of monitoring <br />data collected by the mine is greater than that noted, <br />please revise and update the table. <br />A. The information show on the sub.iect table caas provided b~- <br />the Colorado State Government, Irrigation Division 9. The <br />mine does not have any historic data on Cottonc:ood Creel;, <br />