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SURFACE AND GROUND WATER IMPACTS <br /> SUTEY PROPERTY DISPOSAL SITE <br /> COAL BASIN MINES, REDSTONE, COLORADO <br /> FOR <br /> MID-CONTINENT RESOURCES, INC. <br /> 1. 0 INTRODUCTION <br /> By letter dated July 12, 1984 the Mined Land Reclamation <br /> Division (M LRD) provided Mid-Continent Resources, Inc. with the <br /> Preliminary Adequacy Review Comments on the Sutey Refuse Pile <br /> Permit Revision, File No. C-017-81. <br /> This report comprises a response to the following Review <br /> Comments : 1. Hydrology Description - Rules 2. 04.5 and 2. 04.7 (1) <br /> and (2) , and : 2. Hydroloaic Balance - Rule 2. 05. 6 (3) <br /> The report complements a previous report entitled "Ground <br /> Water Hydrology, Sutey Property Disposal Site, Coal Basin Mines, <br /> Redstone, Colorado" , dated March 26, 1984. <br /> Both reports should assist MLRD in preparing the Findings <br /> Documents for the Sutey Property Disposal site . <br /> 2. 0 GROUND WATER <br /> Ground water levels have been monitored on an approximately <br /> monthly basis in three boreholes at the Sutey Disposal site. As <br /> shown in Table 1, the monitoring program began when the boreholes <br /> were drilled (July, August , 1983) and has continued to the <br /> present time (last available measurement July 5, 1984) . Water <br /> level hydrographs are presented in Figures 1, 2, and 3 for <br /> boreholes W-1, E-1, and E-2, respectively. These boreholes have <br /> been completed in outwash deposits that comprise a water-bearing <br /> hydrogeologic unit directly below the proposed waste pile. In <br /> borehole W-1 water levels were observed to rise slowly during the <br /> months of September to February, rise rapidly from March to mid- <br /> May, and decline rapidly from mid-May through July. In E-1 and <br /> E-2, water levels rose at an approximately uniform rate from <br /> September to mid-May and then declined rapidly through July. In <br /> all boreholes, lowest ground water levels occurred in the month <br /> of August and highest levels during April and May. High ground <br /> water levels coincided with a period of increased precipitation <br /> and high stream flow. Thus, it can be concluded that infiltration <br /> 26 <br />