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Susan Burgmaier <br />C- 1996 -083 TR -84 PAR #3 <br />02 -Jul -2014 <br />Page 5 of 6 <br />MLT 07102: In the 11- Jun -2014 analysis, HBET evaluated the sensitivity of <br />stability at Gob Pile #3 to fluctuations in the groundwater table. This is not what <br />was intended by the Division's original question, which likely could have been <br />worded better. (The Rules require that any seeps or springs encountered beneath <br />a refuse pile be captured by an underdrain in order to prevent groundwater from <br />coming into contact with the refuse.) <br />A rough depiction of the estimated groundwater surface (red lines), based on <br />data in the Mar -2007 Buckhorn report, is shown below. We intended to inquire <br />about the relationship of the inferred water table to the floor of the excavation <br />that was created prior to placement of the coal mine waste. Will that nearer <br />proximity create any potential impacts on the stability of the pile? [The <br />elevations shown in HBET's analyses are not tied to the elevations used in the <br />permit maps, so we are unable to correlate the cross sections with the <br />groundwater surface.] <br />WPP �e oxa1ra rt tF �v . 3 FOOrPRNT <br />I <br />