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Closure Cost Estimate <br /> Exploration <br /> Project Name: REX Exploration Montrose County Colorado-Notice or Exploration <br /> Date of Submittal: December 2022 <br /> File Name: REX_NOI_SRCE_Ver_1_4_1_017_NVb.xlsm <br /> Model Version:Version 1.4.1 <br /> Cost Data:User Data <br /> Cost Data File:20220801_SRCE_Cost_Data_File_1_12_Std_2022.xism <br /> Cost Estimate Type:Surety Cost Basis:N.Nevada Notice Level <br /> Exploration-Cost Summary <br /> Labor I Equipmentarias Totals <br /> Hole Abandonment Costs $711 $520 $7 $1,238 <br /> Trench Backrilling Costs $0 $0 $0 <br /> Subtotal Earthworks $711 $520 $7 $1,238 <br /> Trench Revegetation Costs 0 0 0 0 <br /> TOTALS $711 $520 7 $1,238 <br /> Exploration Trenches-Backflll/Regrading Costs <br /> Productivity=Dozer Productivity x Grade Correction x Density Correction x Operator(0.75)x Material x Visibility x Job Efficiency(0.83) <br /> Trench Dozer Corrected Total Trench Backfill Trench Backflll Total <br /> Description Backfill Push Equipment Dozing Density Backfilling Hourly Dozer Labor Equm 1pent Trench Backflll <br /> (required) Volume Distance Productivity Material Correction Fleet Productivity Hours Cost Cost Cost - <br /> LCY(BCY,30%) ft yd3/hr yd3/hr hr $ $ $ <br /> $0 0 SO <br /> Exploration Trenches-Revegetation Costs <br /> Revegetation Revegelation Revgetation Total <br /> Description Surface Labor Equlpment Material Revegetation <br /> (required) Area Cost Cost Cost Cost <br /> $o $0 $0 $0 <br /> 3W023 <br /> wwm,ve.,..a. Page 8 of 56 Exploration <br />