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Delta Sand and Grave•O. • <br />PIT #1 Amendment <br />M.L.R.B. Jt M-77-020 <br />July 8, 1997 <br />begin, when enough slope is open so an orderly cut/fill sloping <br />operation can be done without risking disruption of the mining <br />operation. Mining will continue as market demands dictate until <br />the reserve is depleted on this parcel. <br />Notice that the exterior slopes of the site are completed at <br />3h to lv as described above. Sloping is done as soon as <br />practical, after mining has reached the perimeter of the site, to <br />reduce the amount of cut/fill work needed at any one time. The <br />sight berm is also in place since the area is totally stripped <br />and ready for mining. <br />once mining is done on the EAST PARCEL, the existing lake <br />will be de-watered and we will begin mining on the west side. We <br />will use the mining method described above and mine towards the <br />west line of the affected area. Please refer to the Mining <br />Timetable following this section for the estimated life of the <br />Parcels described above. <br />The other revisions we are making, is that we will now work <br />on a single near vertical face as mining progresses and the <br />islands shown in the east lake will not be built. The slopes <br />will then be cut/fill graded to 3h to lv, from five foot above to <br />10 foot below the lake surface, as required in the existing <br />permit. This method will be used in both of the new areas. <br />We expect this change to extend the life of the mining <br />operation by 10 years or more depending on the market conditions <br />in the vicinity of the facility. Please refer to Exhibit S for a <br />discussion on permanent and manmade structures in the vicinity of <br />the facility. <br />MINING TIMETABLE (revised 7/97) <br />AREA YEARS MINING <br />AREA TOTAL <br />AREA <br />EXISTING 0.5 to 1 1.33 19.76 <br />EAST PARCEL 5 to 6 15.52 19.92 <br />WEST PARCEL 1 to 3 4.35 5.51 <br />TOTAL 6.5 to 10 21.20 45.19 <br />5 <br />