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D-1 <br /> EXHIBIT D <br /> MINING PLAN <br /> Per Rule 6.4.4,the miningplan shall supply thefollowing information correlated with the affected lands, <br /> map(s),and timetables. <br /> (a) Description of the method(s) of mining to be employed in each stage of the operation as related to <br /> any surface disturbance on affected lands. <br /> The Keenesburg No.2 Mine will be an open cut(truck and hydraulic excavator and/or front end loader) <br /> industrial sand mining operation that will employ a continuously advancing pit with concurrent <br /> reclamation. With ongoing concurrent reclamation,the continuing advance of the active pit area will <br /> progress in a manner similar to that of a surface coal mine, with reclamation constantly occurring <br /> immediately following the mining of a given year's mine block. Pre-strip of salvageable growth <br /> medium will be carried out in advance of mining, with growth medium replacement occurring <br /> concurrent with mining operations(under steady-state conditions)on previously mined areas. <br /> The initial year of operations will be utilized to develop sufficient pit void to accommodate salvaged <br /> growth medium and process waste stockpiles, with initial pre-strip volumes being placed (and <br /> stabilized) within a temporary stockpile (TS-0) ahead of the mining advance (and thus, subject to <br /> rehandle). Commencing in Year 2, limited concurrent reclamation will commence,with pre-stripped <br /> growth medium being backhauled to the prior year's previously mined area and excess being placed <br /> (and revegetated/stabilized), along with that relocated from TS-0, into a(pit-floor) long-tenn growth <br /> medium stockpile (TS-1). Commencing with that year and continuing throughout the life-of-mine, <br /> steady-state mining conditions will employ concurrent reclamation; and, certain other areas/features <br /> (refer to Exhibit E: Reclamation Plan) will also be reclaimed, such that outstanding reclamation <br /> obligations at the end of mine life are minimal. At the end of mine life, the initially recovered (and <br /> long-term stockpiled)growth medium will be largely utilized to accomplish plant area and terminal pit <br /> reclamation requirements. More specific detail is provided, on an annual basis, in Attachment D-1: <br /> Plan of Operations—CSC Keenesburg No.2 Mine Project. <br /> (b) Earthmoving; <br /> Mining will be accomplished via either a single bench or two-bench open-cut mining method <br /> employing hydraulic excavators and/or front end loader units for excavation. Due to the nature of the <br /> Keenesburg No. 2 Mine-112 Reclamation Operation—November 22, 2019 <br />