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11111 <br />2001 Reclamation Plan Amendment - Hole Mining Plan (Area H) <br />The following was excerpted from the 2001 Reclamation Plan Amendment. <br />"Dimensions of Hole Opening - As the Hole (Area H) is created backfilling <br />will occur behind the mining and into portions of the Hole that are completed (see <br />Reclamation Plan, Exhibit E). This will be done for several reasons. <br />First, the amount of waste stored on site for use in backfilling must be <br />• <br />limited. Room available for waste storage is limited and therefore prompt backfilling <br />must be done to avoid creating "mountains" of waste. <br />Second, backfilling with waste will be needed to establish access roads in <br />and out of the Hole. Thus, the need to easily remove the mined rock requires that <br />backfilling be done and this will help limit the dimensions of the Hole that will be <br />open at any one time. <br />Third, it is not expected that any more than 114 of the total length of the west <br />wall of the Hole will be unsupported by backfill (or unmined rock) at any one time. <br />Thus, any large scale instability that might occur would be limited in scope simply <br />because most of the west wall will either be supported by backfill or by native rock <br />yet to be mined. <br />And fourth, to further support the wall, the backfill will be replaced at an <br />angle across the Hole. Angled backfilling behind the mining will proceed as the <br />Hole is excavated to the south. This pattern is also advantageous for access as it <br />reduces the steepness of the road into the Hole. <br />In conclusion, although the stability of the Hole is certainly of concern, the <br />sequence of mining removes much of the stability problem that could occur above <br />the Hole and this will make the Hole much more stable. Creating the Hole before <br />mining Area MV (slope below south and middle peaks) would not be possible <br />because nearly 200 feet of limestone must be removed from portions of Area MV <br />TRANSIT MIX AGGREGATES 16 <br />PIKEVIEW QUARRY SLOPE <br />CTLIT PROJECT NO. CS17341-125 <br />S:ICS17000-174991CS17341.0 0 011 2 512. Reports1CS17341-125-R1-Final.doc