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Topsoil Recovery Documentation <br />No additional topsoil was salvaged since no new disturbance occurred. <br />2014 Topsoil Replacement Thickness <br />There were no acres of topsoil replacement during 2014. <br />Soil Pit - Topsoil Fertility and Spoil Suitability <br />No additional soil pit or spoil samples were collected within the Permanent Program permit <br />area in 2014. <br />Topsoil Balance <br />The topsoil balance is completed to ensure topsoil is salvaged, stockpiled, and replaced as <br />recommended and approved in the permit, and, if necessary, to readjust the topsoil salvage <br />and redistribution thickness. Updated disturbance acreages did not affect the topsoil balance <br />carried forward from previous ARR's. All disturbed areas not deemed permanent have had <br />topsoil replaced. Remaining stockpiles are leftover from permanent areas of disturbance. <br />Topsoil Salvage and Storage <br />The life -of -mine disturbance area from which topsoil was salvaged (850.5 acres) and the <br />topsoil stockpile sites as of December 31, 2014 are shown on the 2014 Topsoil Replacement <br />map. The stockpile volumes are listed in Table 12.1, Topsoil Stockpile Volumes. As of <br />December 31, 2014, there were 41.2 acre -feet of stockpiled topsoil remaining in the mining <br />area. <br />Topsoil Replacement <br />There were no new acres of topsoil replaced in 2014. <br />Topsoil Replacement Thickness <br />The topsoil balance as of December 31, 2014 for the remaining life -of -mine is calculated as <br />follows: <br />Mine Area <br />• Total disturbance area <br />= 850.5acres <br />• Permanent Facilities & Topsoil replaced <br />= 840.4 acres <br />• Disturbance area requiring soil <br />= 0 acres <br />• Soil in stockpiles (Table 13.1) <br />= 36.7 acre -feet <br />• Mean replacement depth available <br />= 4.5 feet (54 inches) <br />By dividing the topsoil available by the area requiring topsoil replacement, we arrive at the <br />future topsoil balance thickness of approximately 4.5 feet for the remaining disturbance area. <br />This generalized topsoil balance does not account for any area variations or for permanent <br />facilities not requiring topsoil, it is strictly an area -wide average. The area for placing this <br />topsoil is the mine entrance road provided the road will be totally reclaimed. <br />During 2007, topsoil thickness sampling was conducted over the top soiled area on a 500 ft. <br />grid. Refer to Yoast Mine Annual Reclamation Report for 2007. The overall average topsoil <br />replaced depth for the areas reclaimed to date is 21.4 inches. The 21.4 inches is right in line <br />with the pre - mining projections of 21.6 inches. <br />4 <br />