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bond release inspection on 13 November 2002, EFCI excavated a test pit on the west side slope of the <br />pile. EFCI excavated down to four feet and there was no visible refuse (see Exhibit K). During the <br />fourth quarter 2002 refuse pile inspection conducted as required by Rules 4.09.1 and 4.10.2, Ronald G. <br />Thompson, under the supervision of Chazles W. McGlothlin, P.E. (Colorado Registration No. 25832), <br />both with Peak Project Management, LLC, excavated five test pits for cover depth and soil suitability. <br />The five pits were excavated on the top of the pile on approximate 500-foot centers (see Exhibit L). <br />Soil samples were taken at one-foot intervals (0-1', 1-2', 2-3' and 3-4') for laboratory analysis. There <br />was no indication that refuse had been encountered in any of the five pits. Based on the field test of the <br />Division (on 13 November 2002) and the independent inspection performed by Peak Project <br />Management, LLC, the Division finds that the refuse pile has been covered in accordance with Rule <br />4.10.4(5). <br />The refuse pile was designed and constructed with rock underdrains to remove water from the pile, <br />thereby increasing its overall stability. The surface of the pile is graded to ensure positive drainage of <br />approximately 0.5% from west to east. Surface water is removed and does not pool on the pile causing <br />infiltration and possible stability problems. <br />The coal prepazation plant produced refuse with particle sizes from coazse to fine. The approved plan <br />for the construction of the refuse pile required alternating lifts of coazse and fine materials, for greater <br />compaction and stability, in lifts no greater than two feet thick. EFCI was required to compact the <br />refuse to a minimum dry density of 52 pounds per cubic foot (pcf). An independent engineering firm <br />performed compaction tests annually. The Division's review of the reports verifies that the required <br />level of compaction has been achieved. <br />Based on the past engineering reports and reviews by the Division, changes to the design of the refuse <br />pile were required on two sepazate occasions. These changes were incorporated into the permit as a <br />result of Technical Revision 14 (approved on 12 June 1992) and Technical Revision 27 (approved on <br />27 May 1997). The pile has been constructed as permitted and the Division has not noted any stability <br />problems to date. See Exhibit M for pictures of the azea. <br />In addition to the annual compaction tests, the refuse pile was, and will continue to be, inspected <br />Southfield Mine Permit No. C-1981-014 <br />SL-2 Findings 24 25 April 2003 <br />