2024-06-07_PERMIT FILE - M2024026 (23)

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Exhibit D Page 1 EXHIBIT D MINING PLAN Per Rule 6.4.4—The mining plan shall supply the following information correlated with the affected lands,map(s), and timetables. (a) Description of the method(s)of mining to be employed in each stage of the operation as related to any surface disturbance on affected lands. The Kersey Mine will be an open-cut industrial sand mining operation that will employ a continuously advancing pit and concurrent reclamation.With ongoing concurrent reclamation,the continuing advance of the active pit area will progress in a manner similar to that of a surface coal mine,with reclamation consistently occurring,typically immediately following the mining of a given year's mine block. Pre-strip of salvageable growth medium will be carried out in advance of mining,with growth medium replacement on previously mined areas occurring concurrent with mining operations(under steady-state conditions). The initial year of operations will be utilized to establish sufficient pit void to accommodate early-stage development of salvaged growth medium and process waste stockpiles.The initial growth medium stockpile will be located in the year 7 mine block(See TS-0 in Exhibit D-2).Commencing in Year 3,limited concurrent reclamation will begin,with pre-stripped growth medium being backhauled to the prior year's previously mined-out area. Surplus volumes would be placed in the long-term growth medium stockpile(TS-1)and revegetated and stabilized. Commencing with that year and continuing throughout the life-of-mine,steady-state mining conditions will employ concurrent reclamation;and, certain other areas/features will also be reclaimed, such that outstanding reclamation obligations at the end of mine life are minimal(refer to Exhibit E: Reclamation Plan).At the end of mine life,the growth medium material accumulated as inventory in the long-term growth medium stockpile(TS-1)will be largely utilized to accomplish plant area and terminal pit reclamation requirements. See Exhibit D-1:Plan of Operations— Kersey Mine Project,for additional details. (b) Earthmoving; Mining will be accomplished via either a single bench or two-bench open-cut mining method employing hydraulic excavators and/or front-end loader units for excavation. Due to the nature of the material(eolian sand),blasting will be unnecessary,and thus is not a component of the mine plan. The directly excavated material will then be loaded to dedicated off-road,articulated haul trucks that will initially ramp out of the box cut pit to deliver run-of-mine (ROM)material to the ROM stockpile,to be situated proximal to the wet plant portion of the processing plant. Once the pit progression has been established to steady-state conditions, it is anticipated that longer duration central corridor"primary"haul roads(see Exhibit D-2: Mine Plan)will be utilized to deliver ROM material from outlying mining areas to the plant area.Temporary, lateral in-pit haulage segments will be utilized to access the "primary" haul roads.A representative equipment list and the proposed mining method and sequence are further detailed in the accompanying Exhibit D-1: Plan of Operations—Kersey Mine Project. Colorado Sand Company II,LLC Kersey Mine Construction Material Regular(112)Operation Reclamation Permit Application June 7,2024