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,.. <br /> <br /> <br />~ -Ill illlllllilllllll <br />THIRD 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 />embanlQnents. Both Bear Coal Company and the Sanborn Creek Mine have approval to dispose of <br />coal mine waste in the gob pile. <br />On September 8, 1998, I performed a visual inspection of the East Yazd and West Valley Fill gob <br />disposal areas at the Sanborn Creek Mine. The East Yard gob disposal area was dry. Nothing was <br />observed during the inspection that would indicate the pile has a potential for failure. The ditches <br />have been cleaned since the previous quarterly inspection. Safety berms are required on the downhill <br />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 azea. Compaction tests are planned <br />following construction of the new coal stockpile as material is added to the waste azea. <br />A considerable quarttity 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 1997 as 852 cubic yards. Bear Coal <br />Company did not haul any material to the gob pile during the last three 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 Mitte. <br />P. O. Box 535 3737 Highway 133 <br />TEL (9 7 0) 9 2 9. 5 1 2 2 <br />S o m e r s e t, C o l o r a d o 8 7 a 3 a U S A <br />FAX (970) 929-5177 <br />