2024-06-07_PERMIT FILE - M2024026 (31)

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Exhibit L Page 1 EXHIBIT L RECLAMATION COSTS Per Rule 6.4.12–Reclamation Costs: (1) All information necessary to calculate the costs of reclamation must be submitted and broken down into the various major phases of reclamation. The information provided by the Operator/Applicant must be sufficient to calculate the costs of reclamation that would be incurred by the state;and, (2) The Office may request the Operator/Applicant to provide additional,reasonable data to substantiate said Operator/Applicant's estimate of the cost of reclamation for all Affected Lands. Colorado Sand Company II, LLC(CSC)herein provides the following discussion pertaining to the respective Reclamation Cost components,along with Table L-1: Reclamation Cost Estimate which details, in a tabulated format,the respective reclamation phases,the therein contained individual component(direct)costs,and a totalization of those direct costs. CSC has then added the following indirect costs to the totalized direct cost,to include the following: • Liability Insurance(2%of Direct Cost Total) • Performance Bond(1.05%of Direct Cost Total) • Job Superintendent($8,750/month,inclusive of 40%benefits burden—for 6-month duration) • Contractor Profit(10%of Direct Cost Total) • Engineering and Bid Preparation(4.25%of Direct Cost Total) • Reclamation Management and Administration(5%of Direct Cost Total) As detailed in Exhibit D: Mining Plan and Exhibit E: Reclamation Plan,the Kersey Mine will employ "concurrent reclamation"throughout the life-of-mine,thus minimizing outstanding reclamation obligations at the time of closure.In addition to the concurrent reclamation activities associated with annual mine blocks,CSC has also employed"advance reclamation"of certain features(as described below). The Table L-1:Reclamation Cost Estimate addresses/includes all activities associated with closure and reclamation of probable"maximum exposure"conditions that would be present at the end of life-of-mine. The term "maximum exposure"is generally indicative of(final)reclamation requirements associated with the final(i.e., terminal)pit reclamation obligation,to include full process plant and facilities demolition,recontouring and revegetation,and"full build-out"of the process waste stockpile. The subject reclamation conditions and post- mining topography are depicted in Exhibit F: Reclamation Plan(consistent with the requirements of Rule 4.2– Financial Warranty Liability Amount). Colorado Sand Company II,LLC Kersey Mine Construction Material Regular(112)Operation Reclamation Permit Application June 7,2024