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<br />6Y~YOrn LrwY YIM <br />FOURTH QUARTER 1998 <br />ENGIlIEERING INSPECTION <br />EAST YARD AND WEST VALLEY FILL <br />GOB DISPOSAL PII.ES <br />The Sanbom Creek Mine approved permit document includes the requirement to inspect the coal <br />mine waste piie 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 />embanlrnierrts. Both Bear Coal Company and the Sanborn Creek Mine have approval to dispose of <br />coal mine waste in the gob pile. <br />On December 4, 1998, I performed a visual inspection of the East Yard and West Valley Fill gob <br />disposal azeas at the Sanbom Creek Mine. The East Yazd gob disposal area was dry. Nothing was <br />observed during the inspection that would indicate the pile has a potential for failure. Safety berms <br />are required on the downhill edge of the pile by the Mine Safety and Health Administration <br />Compaction tests were performed for fourth quarter 1993, second quarter 1994, fourth quarter 1994, <br />second quarter 1995, fourth quarter 1995, second quarter 1996, fourth quarter 1996, and third quarter <br />1997. Gob material has consistently passed compaction tests. Compaction tests are required, as <br />necessary, based on the amount of material added to the waste area. Compaction tests are planned <br />following construction of the new coal stockpile as material is added to the waste area. <br />A considerable quantity of material has been removed from the East Yazd 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 fast quarter of 1998. <br />Surveyor John Menke reports calculation of the volume for 1997 as 852 cubic yards. Bear Coal <br />Company did not haul any material to the gob pile during the last four years. The Bear Mine was <br />closed during December of 1996. Bear Coal Company may haul material to the gob pile as part of <br />the reclamation of the Bear Mine. <br />P.O. Box 535 3737 Highway 133 Somerset, Colorado 81434 USA <br />TEL (970) 929-5122 FAx (970) 929-5177 <br />