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Topsoil/Fines Stockpile Seed Mix Lbs./acre <br />Slender Wheatgrass <br />10.0 <br />Western Wheatgrass <br />10.0 <br />Thickspike Wheatgrass <br />10.0 <br />Crested Wheatgrass <br />3.0 <br />Perennial Rye Grass <br />3.0 <br />Cicer Milkvetch <br />1.0 <br />Utah Sweetvetch <br />1.0 <br />Total 38.0 <br />In order to place 4.5" of fines over the 11.8 acres, 7139 cy is needed. Therefore, no additional volume is <br />needed to complete re-topsoiling using the substitute material. Of the 28.7 disturbed acres in the north <br />mine area, 2.8 acres will remain as ponds and 2.8 acres will remain as roads, therefore, only <br />23.1 acres will require the substitute fines. Using a 4.5" average thickness, this requires 13,976 cy. <br />This amount already exists in the fines piles. This is the minimum volume that will be stockpiled at either <br />of the two locations (Piles #1 and #2). It is also the volume that will be required to be spread at the end <br />of the mine life. <br />The gravel operation generates approximately 750 cy of fines per 100,000 tons processed. Since the <br />operation will process 130,000 tpy, the fines produced per year is 975 tons. Therefore, over the 15 year <br />life of the gravel operation, it is expected that 14625 tons of fines will be produced, which is more than <br />enough to cover the 23.1 acre area to be reclaimed with at least 4.5 inches thickness. The Trust will make <br />every effort to increase this thickness and will salvage and use all fines that can be reasonably obtained <br />from the sediment collection system. <br />Alma Place Mine 01/15 <br />