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FOURTH QUARTER 1999 <br />ENGINEERING INSPECTION <br />EAST YARD AND WEST VALLEY FILL <br />GOB DISPOSAL PILES <br />The Sanborn Creek Mine approved pemut document includes the requirement to inspect the wal <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 />embankments. 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 9, 1999, I performed a visual inspection of the East Yard and West Valley Fill gob <br />disposal areas at the Sanborn Creek Mine. The East Yazd gob disposal azea 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 ]996, fourth quarter 1996, third quarter <br />1997, second quarter 1999, third quarter 1999, and fourth quarter 1999. Compaction tests are <br />required, as necessary, based on the amount of material added to the waste area. Compaction tests <br />aze planned as material is added to the waste area. <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. Surveyor John Menke reported the volume of material removed during <br />1998 as 26,617 cubic yards. A considerable quantity of material has been added to the East Yard <br />area as part of the clean-up after the mine fire in 1999. Bear Coal Company did not haul any <br />material to the gob pile during the last five years. The Bear Mine was closed during December of <br />1996. Bear Coal Company may haul material to the gob pile as part of the reclamation of the Bear <br />Mine. <br />3 7 3 7 Hwy 1 3 3 P O Box 5 3 5 Somerset , C o l o r a d o 8 7 4 3 4 U S A <br />TEL (9 7 0) 9 2 9- 5 1 2 2 FAX (9 7 0 ) 9 2 9- 5 1 7 7 <br /> <br />