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Page 2 ~ • <br />The main waste stockpile area will be between the <br />5860 contour in the south and the property boundary on <br />the north. Drainage will be provided on the west end. This <br />area 270' x 100' x 20' provides about 25,000 tons of stock- <br />pile area. <br />The quarry plan indicates an estimated 10,000 tons of waste <br />material per 60,000 tons of gypsum produced. This was an <br />estimate only. InMinGo's Geologist reevaluated this ratio <br />and he believes it to be high. If the waste rock area is <br />depleted as estimated then additional temporary waste rock <br />stockpile area will be requested until the material can <br />be backfilled in the quarry. <br />3. It is not feasible to increase the slope of the quarry walls <br />at this time. 'Che original estimate of ore to waste is 6:1 <br />at a rate of 20,000 TPY necessitates these slopes. If the <br />slopes are not kept at this ratio then a pit would result <br />in the final quairry. <br />There are many variables that enter into the mine production <br />and as mining progresses and it becomes apparent where the <br />resistant materiials are located, i.e., at which elevation; <br />then the benches would be established to take advantage of <br />this impervious level. Drilling has been recommended to <br />better delineate the deposit so when this information be- <br />comes available the bench levels can better be determined. <br />4. The 0.25 to 1, <is used in this plan, is vertical to hori- <br />zontal distance and has been changed on the revised map <br />to 4:1 (1:025). <br />5. The attached drawings and diagrams show: I.zc" <br />o drainage' way on quarry face ) <br />o riprap i_n rock gutter <br />o diversion ditch cross-section <br />o haul road and diversion ditch cross-section <br />The final reclamation drawing has been revised to better <br />explain the details of the mine and reclamation plan. <br />/NMINCO <br />