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COAL RESERVE QUALITY ENHANCEMENT DRILL PROGRAM <br />• INTRODUCTION <br />The New Horizon Mine coal reserves are based on approximately 105 boreholes drilled between the <br />mid-1980's and 12001 The bulk were drilled by Peabody Coal Company in the 1980's. Western <br />Fuels -Colorado (WFC) drilled about 45 holes from 1993 to 2001. Occasionally, WFC needs to drill <br />intill holes within the existing array to make more certain of its' reserve estimations concerning <br />various mining parameters such as coal quality, coal and overburden thickness, etc. WFC anticipates <br />that during the year 2002 such infill holes will be needed. <br />PROGRAM DESCRIPTION <br />The dri ll program will consist of ten mixed rotary and core holes completed to depths that range from <br />80 to 140 feet (see Figure 2.05.3(3)-12.2). The upper portion of each core hole will be air rotary <br />dri I led to about 2 feet on top of the upper coal seam (UDX). A spot core of about 22 feet will be bored <br />to about 2 below the lower coal seam (LDX). All holes will be completed with a 15 to 20 foot air <br />rotary subdrill below the LDX to allow for E-log probing of each hole. Rotary hole diameter for the <br />• top portion will be between 4.5" and 5.5", the outside core diameter will be about 4.0" to 5.0", and <br />the rotary subdrill will be between 3 7/8" and 5.5". <br />The equipment to be used will consist of amedium-sized single-wall air rotary truck mounted drill <br />rig similar to a Portadrill TKT or Failing CF-15. This type of rig is capable of drilling the spot cores <br />needed. Support equipment will include a 1500 to 3000 gal water truck, boom truck and drillers' <br />pick-up. Actual equipment used and drill hole dimensions will depend on the contractor selected to <br />do the work. <br />EARTI-IMOVING REQUIREMENTS <br />Eight of the ten sites are on fairly level ground that will require no road or site preparation as they are <br />on pasture land. Two ofthe sites will require the clearing of brush or small diameter trees (c 6"), plus <br />the construction of a small pad needed only to level the drill. Estimated aggregate area of disturbance <br />is 2,(100 tt2. Pad clearing will be accomplished by tracked machinery. The two sites required drill <br />pads will not required bladed access roads. Vegetative material cleared will be piled adjacent to the <br />• chi I I pad for later burning <br />(Rcviscd 3/02) Attachment 2.05.3(3)-12- 6 <br />