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n <br />u <br /> <br />Revised I August 1994 <br />All of the plants may or may not be utilized when mining the Phase Four areas. Processing operations <br />will be relocated just west of the Phase Four-B area during mining of Phase Four-B, if the plants <br />remain on site. Only pit-run materials may be removed from the site, minimal processing done on the <br />aggregate, or continued full operations may occur during Phase Four. During mining of the five <br />phases, only approximately 25 acres will be undergoing mining at any given time. <br />Based on our current assessment of the property's reserves and overburden thickness, volume <br />calculations for the minable acreage as shown on Figure D-I, a waste factor of tive percent, and a <br />probable maximum production rate of 500.000 tons per year, the titlluwing timetable is proposed for <br />the four mining phases: <br />Minine Phase Minable Acreaee Production (Million Tons) Approximate Duration (Years) <br />Phase One 51.1 1.70 3.4 <br />Phase Two 89.0 2.98 5.9 <br />Phase Three 37.8 1.26 2.5 <br />Phase Four-A 10.6 0.35 0.7 <br />Phase Four-B 11.4 0.38 0.8 <br />TOTALS 199.9 6.67 13.3 <br />It is assumed that all mining operations, including initial mobilization, plant relocation for Phase Four <br />mining, and tinal reclamation of grading and seeding will he accomplished within a IS to 20 year life <br />span given current economic projections and anticipated production. Based on these projections and <br />the above description, the following table has been prepared summarizing "Areas of Disturbance" <br />during mining. <br />RPO'/9J].799 <br />AI-2 <br />K°A <br />