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COLOWYO COAL COMPANY <br />INITIAL WEST PIT BOXCUT TOPSOIL STRIPPING <br />INITIAL STRIPPING AREA DRAINAGE ANALYSIS <br />(AS BUILT AS OF SEPTEMBER 28, 1994) <br />Dreineege Drainage Aree Drainage Aree Total Acre-Feet <br />Structure To soil Stri Arees To soil Piles Dreine a Area Re wired <br />Acre-Feet Excess <br />Actuel 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 63 46.0 <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 30.4 312.6 29.0 61.5 52.5 <br />Note : West Pit Pond Expansion complete on June 28, 1994 <br />112 Shovel began digging on west side of dam on September 23, 1994 <br />Done by: DSC,SRH,JPG <br />December 17, 1994 <br />