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<br /> <br />EXHIBIT D <br />MINING PLAN (REVISED MAR 19981 <br />Revisions are shown with underlines and --•-~.;:~~. <br />Mining will be accomplished in 6 phases as outlined below with stripping, backfilling, and <br />quarrying going on simultaneously. The overburden material consists of sandstone rock <br />containing SO~Yo SiO2 and 5040 CAC03' This material does breakup and will generate <br />considerable fines which will aid in subsequent revegetation. The underlaying bed is again <br />sandstone rock with the same chemical composition as that of [he overburden. The parting plan <br />between [he limestone and the underlying sandstone is clearly defined, which results in a <br />smooth hard floor after the limestone is removed. This would be very close to the existing <br />[errainieffiex which is rock outcropping. <br />Conventional open pit quarrying methods will be used in [his operation. Both the sandstone <br />overburden and limestone will be drilled and blasted. The shot rock will then be loaded and <br />hauled to the crushing, screening, and stockpiling area. Necessary roads will be constructed as <br />required to provide access to the mining operations. The roads will be constructed primarily <br />with [he overburden material and covered with 3" to 12" of 3/~ minus limestone. Froadways <br />will no[ need [o be constructed outside the disturbed area and will be graded, covered or <br />scarified [o facilitate revegetation. <br />EXHIBIT, D. (REV) MINE PLAN. ROBERTS OUARRY MAR 1998. PAGE 1 OF 3 <br />