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~J <br />COLOWYO COAL COMPANY <br />INITIAL WEST PIT BOXCUT TOPSOIL STRIPPING <br />INITIAL STRIPPING AREA DRAINAGE ANALYSIS <br />(AS BU ILT AS OF JULY 18, 1994) <br />Draineege Drainage Aree Drainage Area Total Acre-Feet <br />Structure Topsoil Strip Areas Topsoil Piles Orainepe Area Required <br />Acre-Feet Excess <br />Actual Acre-Feet <br />#1 <br />West Pit Pond • 73.8 9.9 83.7 7.7 12.8 5.1 <br />#2 <br />Initial Boxcut 169.8 13.4 183.2 17.0 50.3 33.3 <br />#3 <br />In-Pit Control Structure 38.9 7.1 46.0 4.3 5.7 1.4 <br />Total Initial <br />Stripping 282.4 30.4 312.8 29.0 68.8 39.8 <br />• Note : West Pit Pond Expansion complete on June 28, 1994 <br />Done by : DSC,SRH,JPG <br />July 21, 1994 <br />