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Quarterly Lrspection Report-Reffise Pile <br />Twenlaanile Coal Company-Poidel Creel: Mine <br />July 9, 2015 <br />Page 2 of 3 <br />drainage poll area. These areas will be observed at the time of out' next visit whets the roads are drier and <br />the area is accessible. <br />A seepage area at the toe of the northeast end of the refuse pile expansion area, approximately 30 feet <br />northwest of the outlet of tine underdrain, developed in the fall of 2014. At the tune of our observations, the <br />seepage was still surfacing at the toe of the slope and flowing into the drainage from the undrain outlet then <br />into the existing pond east of the Refuse Pile Expansion Area. The discharge remains clear, with no <br />evidence of sedunent. No signs of washout, slumps or slope instability were observed at this tune. The <br />seepage area will be monitored during future inspections and noted in our inspection reports. Photographs <br />of Elle seepage area taken at the time of our inspection on June 30, 2015 are attached. <br />The construction of the portion of the underdrain observed at the time of our site visit ort March 31, 2015 <br />had been completed. The to clordrai n had been extended approximately 75 to 100 feet south from the <br />previously completed portion of the underdrain. The contractor, Bower Brothers Construction, had <br />prepared the subgrade materials and placed [lie drain rock and filter layers I and It for the underdrain. The <br />underdrain appeared to be constructed in general accordance with the plans and specifications. <br />Photographs taken of the exposed portion underdrain construction completed prior to out' site visit are <br />attached. <br />Based on our observations, the surface drainage conditions, with the exceptions noted above, generally <br />appeared to be adequate across the top and sides of the pile. Based on our observations, we did not observe <br />any signs of instability, structural weakness or hazardous conditions at the refuse pile, with the exceptions <br />noted above. <br />We were advised that the wash plants had produced approximately 70,714 tons of waste coal during the <br />mouth of April 2015: approximately 109,175 totes during May 2015: and approximately 90,767 tons daring <br />June 2015. It is our understanding that the fines being produced at the wash plant, which consists of <br />approximately 10 to 20 percent of the total materials being produced, are being pumped underground into <br />the mine. <br />We were previously unformed by Brian Watterson of Peabody that all of Elle original monitor wells installed <br />in the Refitse Pile were destroyed in July 2012. Two new monitor wells were constructed in Area 1 of the <br />Refuse Pile in December 2013. NWCC was advised by Chris Miller that the water level in the western <br />monitor well (RW#1) was measured at 61.02 feet below the existing ground surface (bgs) on April 10"', at <br />60.81 feet bgs on May 18'h and at 60.26 feet bgs on June 24"' of 2015. The water level in the eastern <br />monitor well (RW#2) was measured at 57.89 feet bgs on April 10"', at 57.79 feet bgs on May 18"' and at <br />57.73 feet bgs on June 24'r' of 2015. An additional new monitor well (RW#3) Was constructed at the <br />southeast end of the I" bench in new Expansion Area in June of 2014. The water level in RW#3 was <br />measured at 40.18 feet bgs on April 10, at 40.47 feet bgs on May 18"' and at 40.85 feet bgs on June 20 of <br />2015. The water levels in all of the monitor wells are relatively stable. <br />NNIVC, Int. <br />