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Exhibit D <br />MINING PLAN -2013 Revision <br />Rex Quarry, Permit M -77 -304 <br />Mining will be accomplished in three phases or mining areas as outlined below, with stripping, <br />backfilling, and quarrying going on simultaneously. Mining Area A (the current mining area) is divided <br />into blocks to further delineate progress within the quarry. These blocks were developed using both <br />current and projected mining rates and are subject to change based on market conditions. Mining will <br />progress to each of the next phases (mining areas C and D) as previously mined and reclaimed acres are <br />released. <br />The overburden material consists of sandstone rock containing 50% SiO2 and 50% CaCO3. This material <br />does break up and will generate considerable fines, which will aid in subsequent revegetation. The <br />underlying bed is again sandstone rock with the same chemical composition as that of the overburden. <br />The parting plane between the limestone and the underlying sandstone is clearly defined, which results <br />in a smooth hard floor after the limestone is removed. This would be very close to the existing terrain <br />that is rock outcropping but in order to enhance reclamation, overburden in the form of broken rock will <br />be placed over the bare rock to promote revegetation. <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 primarily with the overburden <br />material and covered with 3 "to 12" of %" minus limestone or sandstone. Roadways will not need to be <br />constructed outside the disturbed area and will be graded, covered or scarified to facilitate <br />revegetation. <br />Mining Area A <br />This is the current mining area and will remain open until around the year 2022 depending on demand <br />for material. Limestone and sandstone will be removed. This will be accomplished by conventional open <br />pit drilling and blasting methods. Limestone is loaded and hauled to the crushing and stockpile area for <br />processing or to backfill areas. <br />Mining area A has been further divided into smaller areas numbered A2, A3, A4, A5, and A6. Stripping <br />and quarrying will progress through those areas, in that sequence, unless demand or market conditions <br />change. <br />Overburden from current operations is being backfilled in backfill areas I, II, and III. Subsequent backfill <br />areas are numbered BFIV through BFXIII and maintain generally the same boundaries as mining areas A2 <br />through A6. The general backfill plan is to have backfilling and reclamation occurring as closely behind <br />quarrying as possible. While overburden is being removed from Mining A2, generally backfilling will be <br />Page 1- Rex Quarry 2013 Revision <br />