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Fourth Quarter 1991 <br />ENGINEERING INSPECTION <br />SOMERSET MINING COMPANY'S EAST YARD GOB DISPOSAL PILE <br />On January B, 1992 I performed a visual inspection of the east yard <br />gob disposal area at Somerset Mining Company's Somerset Mine. The <br />gob disposal area was snow covered and frozen. Both Bear Coal <br />Company and Somerset Mining Company have approval to dispose of <br />coal mine waste in the gob pile. <br />Page 2.05-19, revision 3 dated 7-18-90, of Somerset Mining <br />Company's approved permit document includes the requirement to <br />inspect the coal mine waste pile for stability quarterly. The <br />inspection is to be performed by a registered engineer or other <br />qualified professional specialist experienced in construction of <br />earth and rockfill embankments. The quarterly inspection report is <br />to note the volume of waste material placed in the pile since the <br />last inspection. <br />Somerset Mining Company did not haul any gob to the pile during the <br />quarter. The gob material placed in the pile during the third <br />quarter was compacted during the fourth quarter. <br />Topsoil was removed from the east side of the pile during the <br />quarter in anticipation of working the gob pile in that direction <br />in the future. <br />The side slopes of the pile vary in steepness from 2H:1V to <br />2.5H:1V. No seepage from under or around the pile was detected <br />during the inspection. Nothing was observed during the inspection <br />that would indicate that the pile has a potential for failure. <br />A failure of the pile would probably not be a hazard to human life <br />or property. The pile is located above a large flat bench referred <br />to as the east yard. This bench is 80' to 100' wide directly below <br />the pile. If the coal mine waste pile failed it would very likely <br />be contained in the east yard. <br />~ePpO RE~jf. ~, <br />• Q .•....... <br />~ ~~: •S E S ~-r~w~ /-/~- 9Z <br />~v~Q^ Stover Date <br />~ * -~ 3~01~~o Registered <br />• ~ rof~sslional Engineer No. 19230 <br />w. •Q• <br />.~ : . ~ • <br />CERTREF4 •~if,S., ......,.G~.~~ <br />~:~ONAI oN-~ <br />..~• <br />