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1 <br />y^ <br />III III III III IIII III <br />999 <br />~~//' ~~ <br />/'.~ , ,. ~~ R~CE1V~u <br />MAY 2 41994 <br />~... C L`.,,..0 <br />ENERGY COMPANY "` ~' <br />P.O. 60% 467 GOLDEN, COLORADO 80404 <br />May 19, 1994 <br />Attn: Shawn Smith <br />Reclamation Specialist <br />Division of Minerals and Geology <br />1313 Sherman St. Room 215 <br />Denver, CO 80203 <br />RE: Response to 1993 Annual Hydrology Report and Annual Reclamation <br />Report Keeneaburg Mine (C-81-028) <br />Dear Shorn: <br />In response to the Division's concerns relating to the 1993 Annual <br />Hydrology Report, expressed in your memorandum dated, May 4, 1994. <br />Static Water Level <br />All monitoring yells are completed in the transition zone between the <br />contact of eolain sands and reathered-bedrock clays, with subsurface <br />rater occurrence controlled largely by the configuration of the top of <br />clay and zones or channels of increased permeability (See Section <br />2.04.7 Permit). Because of this geological configuration the static <br />rater level depends greatly on reather conditions, rainfall, anor- <br />pack, and etc.. Relating this scenario to practical experience, CEC <br />alrays had more rater infiltration into the coal pits in the spring, <br />after a rioter of heavy anon-pack. Dryland in our area which ras <br />probed for moisture in 1992 had 48• inches of moisture base in 1993 <br />the base reduced to 24", this is lands which gran Winter Wheat, <br />Barley, and etc.. In addition, the small retland area to the rest of <br />Weld County Raad #59 (Mine Access Road), approximately 1/2 mile south <br />of the Keeneaburg Mine's original gate, had to be dug down deeper in <br />order to have surface rater, so the over all dry conditions have <br />