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Stiles Mining Resource Mine Phase Areas <br /> DESCRIPTION Phase Mine Phase Affected <br /> Area(Acres) <br /> Commercial Phase i Mine&Baddill <br /> 1 2.4 <br /> wash plant pond sVstern. <br /> Mine Phase 2(West Survey Parcel 0) 2 21.8 <br /> Mine Phase 3(Middle Survey Parcel Q 3 24.6 <br /> Mine Phase 4(East Survey Pend 1) 4 23.6 <br /> Mine Phase 5(East Survey Parcel 1) 5 1S.2 <br /> Mine and BadM Surface Area(Acres) 87.6 <br /> Commercial Phase 1 Affiec*d Area including <br /> 39.0 <br /> buffers& excluding seQhling parWis 2.4(Acres) <br /> Mine buffers excluding commercial buffers 25 7 <br /> 'Acres <br /> Total Affected Area{Acres) 152.3 <br /> iii) 25 Acre Maximum Mine Disturbance Commitment-For the mining and backfill portion of <br /> the reclamation bond for phases 2 through 5,the maximum mining and backfill operation <br /> disturbance area is 25 acres at any one time. Multiple phases of mining and backfill may be <br /> disturbed concurrently, provided the total area is equal to or less than 25 acres. <br /> iv) The time to complete the mining of the area is estimated to be 22 years. Maximum <br /> production is expected to be ±300,000 tons per year. Final reclamation is expected to be <br /> complete in ±29 years. Due to market and economic considerations, mining may progress at <br /> a different pace,which will adjust the time for mining and reclamation of the site. <br /> v) Mine phase 2 through 5 will be filled with clean inert backfill from North to South.The mine <br /> phases will be graded to contours consistent with the reclamation plan and similar to <br /> existing ground contours. Based on an estimated daily import rate of 1,300 cy/day, it will <br /> take±29 years to mine and complete the final reclamation of mine phases 1 through 5. <br /> d) Total Affected Area -The Stiles Mining Resource permit and total affected area is 152.3 acres <br /> which does not include the City of Evans vacant 35th Avenue right of way. <br /> Materials <br /> 1) Existing site topsoil, over burden, on site and imported wash plant fines and imported inert <br /> materials will be used to backfill the mine site. <br /> 2) Topsoil—The topsoil will be stored as shown on Exhibit C Mine Plan Map.The volume of topsoil for <br /> all the mining phases is±88,000 tons or±1,500 tons per acre.The depth of the topsoil ranges from <br /> six(6) to twelve (12) inches over the mining area.The topsoil will be striped and stored in the mine <br /> buffer along the south boundary and outside of the excavation area.The topsoil will be stored in <br /> stockpiles about 15 ft high for future reclamation activities.Topsoil stockpiles will have vegetative <br /> stabilization applied to the surface. <br />