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,~ <br />i _~ . <br />- - ~. .. -. <br />:,,-,. <br />SECOND QUARTER 1998 <br />ENGINEERING INSPECTION <br />EAST YARD AND WEST VALLEY FILL <br />GOB DISPOSAL PILES <br />The Sanborn Creek Mine approved permit document includes the requirement to inspect the coal <br />mine waste pile for stability quarterly. The inspection is to be performed by a registered engineer or <br />other qualified professional specialist experienced in construction of earth and rockfill <br />embazdanents. Both Bear Coa] Company and the Sanborn Creek Mine have approval to dispose of <br />coal mine waste in the gob pile. <br />On June 17, 1998, I performed a visual inspection of the East Yazd and West Valley Fill gob disposal <br />areas at the Sanborn Creek Mine. The East Yard gob disposal azea was dry. Nothing was observed <br />during the inspection that would indicate the pile has a potential for failure. The ditches have been <br />cleaned since the previous quarterly inspection. Safety Berns are required on the downhill edge of <br />the pile by the Mine Safety and Health Administration. <br />Compaction tests were performed for fourth quarter 1993, second quarter ]994, fourth quarter 1994, <br />second quarter 1995, fourth quarter 1995, second quarter 1996, fourth quazter 1996, and third quarter <br />1997. Gob material has consistently passed compaction tests. Compaction tests aze required, as <br />necessary, based on the amount of material added to the waste area Compaction tests are planned <br />following constmction of the new coal stockpile. <br />A considerable quantity of material has been removed from the East Yard area for use as base <br />material for the new coal stockpile. Plans are to survey the pile on at least an annual basis for <br />accurate volume reports. The pile was surveyed at the beginning of the first quarter of 1998. <br />Surveyor John Menke reports calculation of the volume for ]997 as 852 cubic yazds. Bear Coal <br />Company did not haul any material to the gob pile during the last three years. The Beaz Mine was <br />closed during December of 1996. Beaz Coal Company may haul material to the gob pile as part of <br />the reclamation of the Bear Mine. <br />P. O. Box 5 3 5 3 7 3 7 H i g h w a y 1 3 3 Somerset , C o l o r a tl o B 1 a 3 4 U S A <br />TEL (970) 9295722 FAX (970) 929-5177 <br />