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Closure Cost Estimate <br /> Cost Summary <br /> Project Name:REX Exploration Montrose County Colorado <br /> Project Date:December 2022 <br /> Model Version:Version 1.4.1 <br /> File Name:REX NOI SRCE Ver 1 4 1 017 NVb.xlsm <br /> Indirect Costs Include? Total <br /> 1.En in ering,Design and Construction ED&C Plan 7 N/A <br /> 2.Contingency 8 N/A <br /> 3.Insurance 9 $111 $111 <br /> 4.Performance Bond It0 N/A <br /> 5.Contractor Profit It 1 $1,585 <br /> 6.Contract Administration It2 $1,585 <br /> 7.Government Indirect Cos[13 $333 <br /> Subtotal Add-On Costs $3,614 <br /> Total Indirect Costs as%of Dired Cost 23% <br /> GRAND TOTAL $19,462 <br /> Administrative Cost Rates(%) <br /> Cost Ranges for Indirect Cost Percentages <br /> 1.Engineering,Design and Construction ED&C Plan 7 $1,000,000M1f <br /> 000 $25,000 000 Small Plan <br /> Variable Rate 8% 6% 4% 0% <br /> 2.Contingency B $500,000000 $50,000,000 $50,000,000 Small Plan <br /> Variable Rate 10% 8% 6% 4% 0% <br /> 3.Insurance 9 1.5% <br /> 4.Bond 10 3.0% ts ti O&M costs are>$100,0005.Contractor Profit 11 10% ts <br /> 6.Contract Administration 12 $1,000,000 $25,000000 $25,000,000 <br /> Variable Rate 10% B% 6% <br /> Government Indirect Cost 13 21%of contract administration <br /> RECLAMATION COST ESTIMATION SUMMARY SHEET FOOTNOTES <br /> 1.Federal construction contracts require Davis-Bacon wage rates for contracts over$2,000.Wage rate estimates may include base pay,payroll loading, <br /> 2.The reclamation cost estimate must include the estimated plugging coat of at least one drill hole for each active drill rig In the project area.Where the <br /> 3.Miscellaneous items should be itemized on accompanying worksheets. <br /> 4.Fluid management should be calculated only when mineral processing actIvRies are Involved.Fluid management represents the costs of maintaining proper <br /> S.Handling of hazardous materials includes the cost of decontaminating,neutralizing,disposing,treating and/or Isolating all hazardous materials used,produced, <br /> 6.Any mitigation measures required in the Plan of Operations must be included in the reclamation cost estimate.Mitigation may include measures to avoid, <br /> 7.Engineering,design and construction(ED&C)plans are often necessary to provide details on the reclamation needed to contract for the required work.To <br /> 8.A contingency cost is included in the reclamation cost estimation to cover unforeseen cost elements.Calculate the contingency cost as a percentage of the <br /> 9.Insurance premiums are calculated at 1.5%of the total labor costs.Enter the premium amount if liability Insurance is not included in the itemized unit costs. <br /> 10.Federal construction contracts exceeding$100,000 require both a performance and a payment bond(Miller Act,40 USC 270et seq.).Each bond premium is <br /> 11.For Federal construction contracts,use 10%of estimated O&M cost for the contractors profit. <br /> 12.To estimate the contract administration cost,use 6 to 10%of the operational and maintenance C&M)cost.Calculate the contract administration cost as a <br /> 13.Government indirect cost rate Is 21%of the contract administration costs. <br /> X2/2023 <br /> vaaexaa zme <br /> Page 4 of 56 3/1/2023 <br />