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• <br />STATE • <br />OF III IIIIIIIIIIIIIIII <br />COLORADO <br />DIVISION OF MINERALS AND GEOLOGY <br />Drparln,enl ui Nalu ral Kc.uurre~ <br />l i l { yhnrmdn Si . Konm ! I S J+tl <br /> <br />Denver. ( olurad i HII!01 ~~~ <br /> <br />I'hunc: 111141 Hbl•~ 151ri III <br />fAS (i011114LfIfIL <br /> DEPAkTMENT OF <br /> NATURAL <br /> RESOURCES <br />January 12, 1996 <br /> Rnv Rumi•r <br /> G nvenvu <br />Mr. Gary Tuttle <br /> <br />Triad Western Corporation lame 1 Lnchhe.ul <br />E~runne DlrrU Ul <br />11990 Grant Street Suite 555 ~,~na~•Ili Inn4 <br />Denver, CO 80233 "^~~~onDnr~~°' <br />RE: 'Pechnical Adequacy Review of amendment application for 112 <br />Permit #M-88-044, Coal Creek Resources <br />Dear ]Hr. Tuttle, <br />This letter is being written to address technical adequacy issues <br />in your company's amendment application to permit #M-88-044. The <br />following issues must be resolved before the Division of Minerals <br />and G,aology (DMG) can evaluate the amendment application. <br />1) In Exhibit G (Water Information) it is stated that a channel <br />diver:aion will be constructed in the Lowlands section of the <br />amendment area, should it become necessary to divert water away <br />from the mining in the creek bottom. DMG needs the following <br />information in order to make a determination with regard to the <br />amendment application: <br /><i) the basic dimensions of the channel to be constructed, <br />including sloping and any erosion control measures <br />li) the approximate location of the channel in relation to <br />the mining and the original creek bed <br />c:) the reclamation measures to be taken to return the <br />diver:;ion to its original state, including a cost estimate of the <br />tasks involved in such reclamation. <br />2) In Exhibit D (Mining Plan) there is some discussion regarding <br />the monitoring of the groundwater table, and the measures to be <br />taken if the groundwater level falls two feet below the average <br />depth.. Specifically, it is stated that: <br />"If the ground water Qeclines more than two feet below its <br />normal fluctuation of 1 to 1 1/2 feet in the Cottonwood groves, <br />then t:he trees will be monitored for signs of stress such as limb <br />die-oi.'f, leaf size reduction, changes in weight of tree litter, or <br />tree mortality. If significant stress is noted, the operator will <br />decrease the depth of mining or increase the setback from tree <br />grouper . " <br />