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current groundwater quality. The description of the probable hydrologic <br />consequences may be found starting at page 780-110R of the Marr Mine permit. <br />Baseline groundwater quality information may be found on page 779-36aa and <br />Table 6 of the Marr Mine permit. Certain pages from Kerr's 1995 AHR were <br />submitted to the Division in January 1996 for the purposes of developing this <br />section of this report. <br />a. Sudduth Coal Seam Aquifer Water Quality <br />The Sudduth Seam is the seam from which coal was extracted in Pit 1. <br />Well 79-61 is completed in the Sudduth Coal Seam Aquifer and is situated <br />approximately 1000 feet northeast of the northern limit of Pit 1. A <br />comparison of baseline coal aquifer water quality data to curnnt coal aquifer <br />quality, as measured in Well 79-61, indicates that the current water quality of <br />the coal seam aquifer at We1179-61 falls within the range of values obtained <br />during baseline sampling and reporting. This comparison is presented in <br />Exhibit 1. <br />b. Alluvial Aquifer Water Quality <br />Bush Draw is a small, intermittent stream drainage situated 250 feet north of <br />Pit 1. Bush Draw has been previously determined by DMG to not be in an <br />alluviat valley floor in the vicinity of Pit 1. Well AO-2A is completed in the <br />alluvium of Bush Draw, approximately 3500 feet downstream of Pit 1. A <br />comparison of the baseline alluvial water quality and the current quality of <br />the water in Well AO-2A indicates that, with the exception of a slightly <br />elevated TDS value, the current quality of the water in the Bush Draw <br />alluvium falls within or below the range of values reported as baseline <br />conditions. This comparison is presented in Exhibit 2. <br />c. Overburden Aquifer Water Quality <br />There aze no wells within one-half mile of Pit 1 that aze completed in the <br />overburden above the Sudduth Coal Seam. <br />Based upon these comparisons of baseline and current water quality, the Division <br />believes that pollution of those groundwaters being currently monitored within the <br />area of Pit 1 is not occurring at this time. As both the 720 Pit and Pit 1 have now <br />been backfilled, the Division anticipates the quality of monitored groundwater to <br />continue staying near baseline levels, as predicted in Kerr Coal Company's <br />description of probable hydrologic consequences. <br />VI. Conclusions <br />The Division concludes, based upon the investigations, observations, and evaluations <br />documented herein, that backfilling, regrading, and drainage control in Pit 1 at the Matr <br />Mine has been successfully completed by Kerr Coal Company in accordance with approved <br />-6- <br />