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iiiiiiiiiiiiiiiiiii <br />.onOOrm Cnek Mlne <br />FOURTH QUARTER 2001 <br />ENGINEERING INSPECTION <br />EAST YARD AND WEST VALLEY FILL <br />GOB DISPOSAL PILES <br />The approved Oxbow Mining, LLC Mine permit document includes a requirement for quarterly <br />inspections of coal mine waste piles for stability. The inspection is to be performed by a registered <br />engineer or other qualified professional specialist, who is experienced.in the construction of earth and <br />rockfill embankments. <br />On December 27, 2001, a visual inspection was performed ofthe East Yard and West Valley Fill gob <br />disposal areas. The East Yard gob disposal area has reached its design capacity, and no new gob <br />material has been placed since June of 2001. The East Yard pile is currently being covered with a <br />subsoil cap, ranging from four to eight feet thick. Nothing was observed during the inspection that <br />would indicate the pile has a potential for failure. Safety berms are required on the downhill edge of <br />the pile by the Mine Safery and Health Administration. <br />The West Valley Fill has continued to receive gob material. Approximately three feet of material has <br />been added since the last quarter. Compaction tests were performed on June 29, 2001, and October <br />22, 2001. 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 as <br />material is added to the waste area. <br />Inspected by: <br />Under Direction of. <br />Benjamin <br />Colorado <br />rr •-.;~ <br />P.O Box 535 3737 Highway 133 <br />TEL (9 7 0 j 9 2 9- 5 1 2 2 <br />Engineer No. 34286 <br />Somerset , C o l o r a d o 8 1 x 3 4 U S A <br />F A x (9 7 0) 9 2 9- 5 1 7 7 <br />