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~....., <br />COLOWYO COAL COMPANY <br />1992 - 1996 PERMIT PERIOD <br />TECHNICAL REVISION TR-28 DRILL HOLES AND ADD. TOPSOIL PILES <br />BOND CALCULATION ADD-ON <br />Number of Cost Total <br />Activity Acres Per Acre Cost <br />Additional Revegetation Costs <br />Topsoil Pile TPS #15L and <br />TPS #i5M Disturbance 19.35 $258.00 $4,992.30 <br />Drill Holes 4-94-1, 4-94-7 and <br />4-94-8 Disturbance <br />@ 200' by 200' avg. 2.75 $258.00 $709.50 <br />Access Roads to Drill Holes <br />@ 1,974 feet by 60' width 2.72 $258.00 $701.76 <br />----- ----- ----- <br />Total Addtional Revegetation 24.82 $258.00 $6,403.56 <br />Total Cost Total Depth Cost Per <br />• SealinSl and Plugginp Drill Holes For Task For Holes Foot <br />Currernly Bonded Amount for Monitoring Wells <br />_ _._ <br />CMLRD Task Number 85 $3;752.84 7001; $5:36; <br /> Total Depth Cost Per Total Cost <br />Newly Proposed Drill Holes For Holes Foot For Task <br />4-94-1 350 $5.36 $1,876.00 <br />4-94-7 320 $5.36 $1,715.20 <br />4-94-8 250 $5.36 $1,340.00 <br /> <br />Total Additional Drill Holes ----- <br />920 ----- ----- <br />$4,931.20 <br />TOTAL ADDITIONAL BOND AMOUNT FOR TECHNICAL REVISION TR-28 $11,334.76 <br />April 7, 1994 <br />• <br />'1 R ~ <br />s~~19 v <br />