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Topsoil Needed = <br />Zone Area (ac) * 43,560f`y,* Soil Thickness (in) <br />12,f, * 27 f`td3 <br />The size of the stockpiles is determined via detailed surveys conducted on site. All soil thicknesses are <br />designed to the nearest inch, since this is the practical measurement limit for the scale of equipment used <br />at the New Horizon Mine. <br />12.2 North of BB Road/West 2700 Road <br />These lands include all lands north of BB Road and west of 2700 Road except for the 4.76 acres of prime <br />farmland soils (WFC Prime Farmland). As of June 2012, there is approximately 107 acres of land that has <br />been backfilled and topsoiled with Mixed Topsoil that covers all of Benson West and about half of the <br />Lloyd (WFC) property. These area is shown on Map 2.05.4 -7 as Zone 5. Mixed Topsoil was placed atop <br />of Bench 1 material in Zone 5. Some samples of the Bench 1 material were taken in 2008 from this area <br />and tested, however, no additional testing will be done on this material in this area. <br />Once spoil has been placed and graded, it will be ripped to at least 24 inches below grade before the <br />Mixed Topsoil placement. Map 2.05.4 -7 shows these areas with the calculated acreage and replacement <br />thicknesses. <br />The calculations for the replacement of the these areas are shown below: <br />End Of Moved Text <br />Zone 5 (109.51 acres) - Topsoil: 15 to 24 inches (21 in. avg.) of Mixed Topsoil over at least 30 inches <br />of Bench 1 Surface Spoil. <br />Zone 6 (23.61 acres) - Topsoil: 12 to 20 inches (13 in. avg.) of Mixed Topsoil over at least 24 inches <br />of Bench 1 Surface Spoil. <br />Zone 7 (79.01) - Topsoil: 8 inches of Mixed Topsoil over at least 18 inches of Bench 1 Substitute <br />Subsoil. <br />August 2013 (PR -08) 2.05.4(2)(d) -35 <br />