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EXHIBIT D <br /> MINING PLAN(REVISED APRIL 2014) <br /> Mining will be accomplished in 6 phases as outlined below with stripping, backfilling and quarrying <br /> going on simultaneously. The overburden material consists of sandstone rock containing 50% Si02 and <br /> 50% CAC03. This material does breakup and will generate considerable fines, which will aid in <br /> subsequent revegetation. The underlying bed is again sandstone rock with the same chemical <br /> composition as that of the overburden. The parting plane between the limestone and the underlying <br /> sandstone is clearly defined, which results in a smooth hard floor after the limestone is removed. This is <br /> very close to the existing terrain,which is rock outcropping. <br /> Conventional open pit quarrying methods will be used in this operation. Both the sandstone overburden <br /> and limestone will be drilled and blasted. The shot rock will then be loaded and hauled to the crushing, <br /> screening, and stockpiling area. Necessary roads will be constructed as required to provide access to the <br /> mining operations. The roads will be constructed primarily with the overburden material and covered <br /> with 3" to 12" of 1/4" minus limestone. Roadways will not need to be constructed outside the disturbed <br /> area and will be graded, covered or scarified to facilitate revegetation. <br /> EXHIBIT D.(REV)MINE PLAN,ROBERTS QUARRY APRIL 2014,PAGE 1 OF 3 <br />