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March 31, 2015 <br />1.0 Introduction <br />In compliance with Rule 4.09.1 (11) of the Regulations of the Colorado Mined Land Reclamation Board <br />for Coal Mining, a quarterly inspection and report on the construction and associated activities of the <br />Horse Gulch Fill (HGF) at Trapper Mine in Craig, Colorado has been completed. The quarterly inspection <br />was conducted on March 26, 2015, by Tonia M. Perkins, a licensed professional engineer in the State of <br />Colorado. <br />Construction activity related to the fill has been consistent with the approved design. Details of this <br />design can be found in Agapito Associates, Inc.'s (AAI) Horse Gulch Fill Stability Analysis, dated May 29, <br />2009. <br />No appearances of instability, structural weakness, or other hazardous conditions were observed. Both <br />the south west side of the dump and the north east spoil side of the dump were inspected this quarter. <br />The area where cracks were detected on the top south portion of the dump during the first quarter of <br />2013 inspection was checked. There was no additional cracking found. The two spots above the 7350' <br />elevation on the south side of the dump that showed some differential settling in the second quarter of <br />2013 was inspected. The south site did not show any additional settling (Photograph 1). The north site <br />showed a bit more settling (Photograph 2). Monitoring these areas on a regular basis will continue. The <br />area where a spring was discovered during the third quarter 2011 inspection was inspected. There was <br />less than a tenth of a gallon per minute of water flow (Photograph 3). <br />Photograph 1: South Site above the 7350 Bench Elevation (312612015) <br />P4 <br />