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EXHIBIT D <br /> MINING PLAN <br /> The Coaldale Gypsum Mine is a surface mine in Fremont County, Colorado. The extraction <br /> of hydrous calcium sulphate, CaSO4.21­12O, commonly known as gypsum, has occurred at <br /> Coaldale, Colorado since 1907. At that time and up until 1956, local miners extracted <br /> gypsum under contract with the property owner, the Ideal Cement Company. Ideal Cement <br /> Company sold the property to Pabco Corporation in 1955. In 1956 Pabco changed their <br /> name to Fiberboard Paper Products Corporation and began using approximately one-half of <br /> the Coaldale gypsum production at their wall board manufacturing facility, located 4 miles <br /> East of Florence, Colorado. Fiberboard sold both properties to John-Mansville Corporation <br /> in 1968, and they operated the properties until August 1973, when they were sold to the <br /> Flintkote Company. Flintkote Company operated the properties until it was sold to Domtar, <br /> Inc. Domtar operated the properties until 1990 when it curtailed operations and the property <br /> has been in Temporary Cessation since then. Domtar, Inc. was acquired by Georgia Pacific <br /> in 1996 with transfer of permits. Reclamation was initiated and continued under Georgia <br /> Pacific until September 2006 when the property and minerals were purchased by Holcim <br /> (US) Inc. The current permit is under Temporary Cessation until September 24, 2007. In <br /> February 2007, Holcim (US) Inc. submitted an amendment to the permit. <br /> In 2006 core drilling at the Coaldale Quarry Site confirmed approximately 1.6 million metric <br /> tons of recoverable gypsum available. It is planned that the gypsum quarry will produce <br /> approximately 50,000 to 90,000 metric tons of crushed gypsum on a yearly basis for a life of <br /> mine of approximately 32 years @ 50K metric tons per year or 18 years at 90K metric <br /> tons/year. <br /> After 2006 with better understanding about its geology and constraints; Coaldale quarry <br /> ended in 2019 with almost 243,OOOt of gypsum as reserves which meant three years life, <br /> considering actual production. Further exploration is needed in order to reclassify and <br /> increase figures as resources and reserves. <br /> 1 <br />