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

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Exhibit D Page 5 The material to be mined is classified as an eolian(dune)sand deposit of varying depth and character.CSC anticipates that mining depth will be largely influenced by localized variability in thickness and/or sand quality characteristics(i.e.,the degree of undesirable silt or clay content)as well as the resultant(projected)process recovery factors. Thus,operational constraints may result in certain localized areas(of the deposit)not being mined to their full extent. Based on available data,anticipated pit-floor conditions can be described as a silty sand,silt,and mudstone matrix, thereafter grading(at greater depth)into shale. It is anticipated that pit floor conditions will readily support mining operations,given the equipment suite selected for mining(i.e.,hydraulic excavators,front-end loaders,and articulated haul trucks). Where minor, isolated saturated lenses are or may be encountered within the deposit during active mining,it is anticipated that free drain-down(e.g., infiltration)will naturally occur and/or that conditions can be addressed through temporary routing of such seepage to low-lying areas within the active mining pit depression. In general,it is anticipated that the immediate pit floor sub-horizon(following completion of mining)will accommodate rapid and high infiltration rates within the mined-out pit depression. (g) Identify the primary and secondary commodities to be mined/extracted and describe the intended use. The primary commodity to be mined is an industrial sand product to be utilized within the regional oil and gas industry sector. Secondary commodities which may be produced include clay and/or process"reject"(i.e.,off-specification sands) which can be locally utilized for oil and gas pad or access construction and/or construction fill,respectively. While the extent of the commercial scale market(if any)for these secondary commodities is indeterminate at this juncture, CSC retains the right to market and/or sell any or all such materials if economic conditions warrant such. CSC envisions that any such secondary commodity production or sale would be marginal in terms of tons per year(e.g., less than 50,000 tons per year). (h) Name and describe the intended use of all expected incidental products to be mined/extracted by the proposed operation; As discussed in sub-section(g), above, CSC may,from time to time, sell limited quantities of materials derived from the mining and/or processing operations. Thus,CSC shall(as noted above)retain the right to sell a secondary commodity(and/or commodities)such as"clays","fines", and/or"coarse"or oversized"material(e.g.,off- specification material)that are saleable,to the extent market conditions warrant such. With respect to the"off- specification"material,the composition of such material(s)would be virtually identical(other than particle size)to that of the primary commodity,that being a#30/140 industrial sand product. (i) Specify if explosives will be used in conjunction with the mining(or reclamation). In consultation with the Office,the Applicant must demonstrate pursuant to Sub-section 6.5(4): Geotechnical Stability Exhibit,that offsite areas will not be adversely affected by blasting. The Kersey Mine will not utilize explosives. The material to be mined is largely an unconsolidated eolian sand deposit and material extraction will be accomplished via hydraulic excavator(s)and/or front-end loader(s). Other earthmoving equipment to be utilized in the operations may include motor graders, scrapers, and/or similar heavy equipment. Since blasting will not be employed at the Kersey Mine there is no potential for offsite areas to be adversely affected by blasting effects;and, accordingly,the subject Division of Reclamation, Mining,and Safety (DRMS) 112(C) Construction Materials Permit—is exempt from the requirement to prepare a Geotechnical Colorado Sand Company II, LLC Kersey Mine Construction Material Regular(112)Operation Reclamation Permit Application June 7,2024