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Mr. Billy Owens <br />Page 3 <br />associated with working around highwalls. The work area will be inspected twice per <br />shift while the work is ongoing. Two paths of egress will be maintained at all times, and <br />positive communication will also be maintained. Equipment operators will be informed <br />of the presence of any new cracks or signs of instability in the vicinity of their assigned <br />work area and will approach these features in a manner that ensures their safety using the <br />techniques that are commonly employed when working in and around highwalls (i.e. slot <br />dozing techniques). Spotters will be utilized if necessary as conditions warrant. <br />Task 3: Trapper Mine will construct a buttress to stabilize the slide scarp located at <br />the southern end of G-dip pit adjacent to the H Seam coal that remains exposed in this <br />location. The buttress will be constructed using bull dozers to push and compact spoil <br />material from east of this area into the void beneath and adjacent to the scarp. 'rtee <br />buttress will be progressively constructed from the east side of the scarp to the west thus <br />ensuring that operator exposures to highwall and slide hazards are minimized. <br />When the landslide moved into G-dip pit in this area, the end-wall height between the H <br />seam coal horizon and the K seam coal that was displaced by the slide was about 70 feet. <br />This represents the maximum height of the buttress to be constructed. Trapper Mine <br />plans to push spoil material from the area east of the slide, across the bench where the <br />dragline was sitting during the slide event, and into the pit to the north of the H seam <br />exposed coal. This material will serve to buttress the highwall/scarp face that remains in <br />the area. The area to be buttressed is between Northing 401,500 and 402,000 and Easting <br />1,438,500 and 1,438,750. To date, no cracks of any kind have developed on the eastern <br />backwall/highwall azea from which spoil will be utilized to establish the buttress. <br />Buttress construction work will be done using experienced dozer hands familiar with the <br />hazards associated with working around highwalls. Illumination sufficient to provide <br />safe working conditions will be provided at all times. This work azea will be inspected <br />twice per shift while the work is ongoing. A reliable means of egress from the work zone <br />will be maintained at all times, and positive communication will also be maintained. <br />Equipment operators will be informed of the presence of any known cracks or other signs <br />of instability in the vicinity of their assigned work area and will approach work in this <br />area in a manner that ensures their safety using the techniques that are commonly <br />employed when working in and around highwalls and production dozer operations (i. e. <br />slot dozing techniques). If significant cracks or other signs of instability aze noticed <br />during inspections or while work is ongoing, operators will be instructed to immediately <br />withdraw from the area. <br />Task 4: Trapper Mine plans to drill a series of exploration drill holes within the <br />slide area to determine what horizon the landslide block is sliding on and to ascertain the <br />status of coal reserves remaining in the area. Initially two holes are planned at the <br />approximate locations shown. These holes are projected to lie within the rubblized zone <br />S:\,MSHACOMP\K Order Mod Request #l.doc <br />