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First Quarter 1994 INSPECTION SOMERSET MINING COMPANY'S EAST YARD GOB DISPOSAL PILE On April 1, 1994, I performed a visual inspection of the east yard gob disposal area at Somerset Mining Company's, Somerset Mine. The gob disposal area was dry. Both Bear Coal Company and Somerset Mining Company have approval to dispose of coal mine waste in the gob pile. Page 2.05-19ii, dated 12-10-92, of Somerset Mining Company's approved permit document includes the requirement to inspect the coal mine waste pile for stability quarterly. The inspection is to be performed by a registered engineer or other qualified professional specialist experienced -.in construction of earth and rockfill embankments. The quarterly inspection report is to note the volume of waste material placed in the pile since the last inspection. Bear Coal Company did not haul any material to the gob pile during the quarter. Somerset hauled approximately 36 tons of material to the gob pile during the quarter. The side slopes of the pile vary in steepness from 2H:1V to 2.SH:1V. A small amount of seepage was noted on the west end of the pile. It is assumed the seepage is a result of recent rains or snowmelt percolating down through the pile. Nothing was observed during the inspection that would indicate that the pile has a potential for failure. A failure of the pile would probably not be a hazard to human life. The pile is located above a large flat bench referred to as the east yard. This bench is 80' to 100' wide directly below the pile. If the coal mine waste pile failed, it would very likely be contained in the east yard. The overland conveyor and conveyor drive on the bench below the pile m~gh~d~ damaged by a failure of the pile. ~e~p~ REG/Sl+ i oQ~~ ~ E' Si'~ F9+9 , , 10 ~ ~~ /~•° Os V ~~ ~ ~ ~ ~. _ ~~ es . -' toyer a ~°glprado RegiS't,~'red Date ceexaeei Piz,,ssiona~~' ~t3ineer No. 19230 \ ~ v~ ~ • Q (~!%i •e~a•