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contain approximately 3,900 cubic yazds of topsoil stripped prior to future advances of the waste <br />embanlanent. Subsequent topsoil stripping will be used to contemporaneously reclaim previously <br />• regraded areas of the waste embankment. <br />Area 3: Area 3 comprises the steeper slopes along the south edge of the waste embanlanent <br />expansion. Soil boring 5 with a topsoil thickness of 1.2 feet was completed at the base of this slope. <br />No borings were completed higher up on the slope, but based on a visual inspection, it is appazent <br />that this azea has a thinner soil cover than Area 2. For estimating purposes, a soil thickness of 0.8 <br />feet is assumed, which results in an estimated topsoil volume of 3,000 cubic yards over the 2.36 <br />acre azea. <br />Area 4: This azea is north of 5/10 Road and will contain the treatment plant and various ponds. No <br />soil borings were completed in this azea, but the azea is similaz in grade and land form to Area 2. <br />An average topsoil thickness of 1.6 feet is assumed for Area 4. Since the azea is 1.71 acres, the <br />topsoil volume available for stripping is estimated to be 4,400 cubic yazds. The majority of this <br />topsoil (4,200 cy) will be placed in a stockpile east of the water treatment area and subsoil <br />• stockpile (see Pond Excavation below). Some of the topsoil (200 cy) will be placed as a 6-inch <br />cover over the sideslopes of the sediment pond and the fill stockpile that will be excavated from the <br />pond azea. The placed topsoil will seeded to produce a stable, vegetated cover during active mining <br />operations. During reclamation, the topsoil will be stripped from the subsoil stockpile and the <br />sediment pond prior to regrading the azea. After the azea has been regraded to the approximate <br />original contours, the topsoil will be placed on top. <br />The total estimated volume of topsoil available from the four azeas is approximately 30,400 cubic <br />yazds. It is believed that this estimated volume is accurate to plus or minus 20 percent. The <br />reclamation design and cost estimate aze based salvaging and placing 30,400 cubic yazds of topsoil. <br />•~ <br />Whirlwind Mine June 07 D-16 <br />