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COLOWYO COAL COMPANY <br />1991 PERMIT APPLICATION <br />FACILITIES RIPPING VOLUMETRIC CALCULATIONS <br />Ripping Volumes <br />Area Description Loose Bank Total Ripping <br />Volume Volume Acres Depth <br />ILcy) IBcyl lacres) (feet) <br /> <br />Phase I -East Pit Summary <br />11) Mine Maintenance Area Disturbance <br />121 Taylor Creek Scoria Pit Disturbance <br />13) Administrative Area Disturbance <br />14) Haul Road North Disturbance <br />15) Gossard Area Disturbance <br />(6) Wilson Pond Disturbance Area <br />(7) Total Facilities Ripping <br />A-16 <br />443,666 354.933 110.0 2 <br />38,316 30.653 9.5 2 <br />12,906 10.325 3.2 2 <br />144,394 115.515 35.8 2 <br />328,314 262.651 81.4 2 <br />565 .452 0.1 2 <br />968,161 774.529 240.0 2 <br />Revised May 3, 1997 <br />