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Exhibit D <br /> Page 20 <br /> (thickness,areal extent,and quality,etc.)and/or insufficient information as to operating oil and gas <br /> facility infrastructure abandonment timing. Resources within these areas have been preliminarily <br /> estimated in the following manner. <br /> Temporary Mining Deferral Zones: As currently defined,the two"Temporary Mining Deferral Zones" <br /> (TMDZ-1 and TMDZ-2)occupy portions of Section 14 and Section 15,respectively. TMDZ-1 occupies a <br /> portion of the southern one-half of Section 12, as well as approximately three-quarters of Section 14. <br /> TMDZ-2 occupies a large portion of Section 15,and extends easterly into Section 14. <br /> As earlier indicated,these TMDZs have been largely"set aside"due to a lack of sufficient exploration <br /> data(i.e.,number and density of boreholes)to support meaningful analysis of the resource base and a <br /> determination of its general mineability(i.e.,presence and unknown duration of ongoing oil and gas <br /> infrastructure, etc.).However,based on extrapolation and/or the limited data available to date, CSC <br /> anticipates that the gross resource base in these TMDZ areas may collectively comprise some 50 million <br /> tons of mineable material,potentially representative of an incremental twelve(12)to thirteen(13)year <br /> extension to the currently defined twenty(20)year life-of-mine(plan). <br /> 4.6 Completion of Mining-Final Site Closure and Reclamation (Terminal Pit and Plant Area) <br /> Although more specifically addressed in greater detail within Exhibit E: Reclamation Plan,final site closure and <br /> reclamation can be summarized as including the following: <br /> • Growth medium salvage during the early life of mine will incorporate long-term stockpiling of surplus <br /> growth medium material sufficient to ensure that the terminal pit area will receive the nominal 8-to 12- <br /> inch growth medium cover consistent with all other mined out areas; <br /> • The terminal pit area will be reclaimed in a manner consistent with all other mined out areas; <br /> • Remaining primary haul roads will be scarified(on retreat)over their full extent from prior mining areas <br /> back to the plant area,although lesser width two-track access roads may be established/maintained at <br /> locations to be determined,in order to provide ongoing access to reclaimed areas for purposes of site <br /> monitoring and maintenance,to be carried out over a five-year post-closure monitoring and maintenance <br /> period.; and, <br /> • Plant area structures,ancillary features, and paved surface areas will be demolished and/or removed from <br /> the site, and the plant area in its entirety will be reclaimed in a manner consistent with that presented in <br /> Exhibit E: Reclamation Plan,utilizing the growth medium material previously accumulated in the TS-1 <br /> stockpile during early-on site development activities. <br /> 5. Processing Plant Operations <br /> The Kersey Mine will employ wet and dry processing stages to produce a singular saleable product comprised <br /> of#30/#140 industrial sand. All mined materials will be processed onsite,employing both wet(wash)and dry <br /> (thermal drying followed by screening)process unit operations typical of those utilized in the sand and gravel <br /> industry. <br /> A preliminary/conceptual plan-view layout of the major components of the Kersey Mine's plant facilities is provided <br /> as Exhibit D-3: Mine Process Plant&Facilities Layout,with major components of the plant facilities being <br /> Colorado Sand Company II, LLC <br /> Kersey Mine Construction Material Regular(112)Operation Reclamation Permit Application <br /> June 7,2024 <br />