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<br /> iiiiiiiiiiiiiiiiiii <br />STATE OF COLORADO <br />DIVISION OF MINERALS AND GEOLOGY <br />Dcpa rl mcnl of Namrul Krsuurt cs <br />1 41 4 Sherman SL, Kuum ! I S `p <br /> <br />Denver, Culnr.ulo 811!04 I <br />~~ <br /> <br />Phone: (.tfl i) BOL- t5L7 II <br />FAti 1 Nl.tl B.I! 7VIIIL <br /> DEPARTMENT OF <br /> NATURAL <br /> RESOURCES <br /> <br />November 12, 1996 Ray Romer <br />Governor <br /> Iamc.S Lo<hhcad <br /> E ~ecwwe Dirennr <br /> <br />Mr. Jim Kiger V khac B Long <br />Dlvitinn Dheaar <br />Colowyo Coal Co. L.P. <br />5731 State Highway 13 <br />Meeker, CO 81641 <br />RE: Colowyo Coal Mine (C-81-019) <br />TR-38; Live Stock Water Tanks <br />Dear Mr. Kiger, <br />The Division received your letter dated October 24, 1996 responding to our initial adequacy <br />concerns of TR-38. The Division has the following comments regarding Colowyo's <br />responses; <br />1. As noted in the previous letter, the Live Stock Water Tanks need to be depicted on <br />a map. The Division is unable to properly assess the location of the stocktanks with <br />the photocopy provided by Colowyo. The stocktanks do not necessarily need to be <br />on the Hydrology Map or the Postmining Contour Map at this point in time. The <br />Division recommends that the stocktanks be depicted on the Annual Reclamation <br />Map and inserted into the permit. <br />2. Colowyo states that Stocktanks A, B, C, and D are located on contour drainages and <br />E and F are located in sub-watersheds. According to the State Engineer, a dam <br />intended to hold water for livestock is a livestock watering pond if it is located in a <br />normally dry stream. None of these ponds appear to be located in a dry stream <br />channel. The Division has the following concerns; <br />a. The Division does not consider contour ditches as dry channels. Contour <br />furrowing is considered to be a successful treatment for establishing <br />vegetation on reclaimed slopes. Contour furrows should be interrupting <br />surface runoff to control erosion, not diverting it to impoundments. Under <br />normal conditions, the water holding capacity for contour furrows is <br />approximately two inches of rain the first year and one inch by the 5th year. <br />Contour furrows generally degrade in performance from five to twelve years. <br />