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Closure Cost Estimate <br /> Reclamation Quantities <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 /> Data Cost File:20220801_SRCE_Cost_Data_File_1_12_Std_2022.xlsm <br /> Cost Data:User Data <br /> Cost Data File:20220801_SRCE_Cost_Data_File_7_12_Std_2022.xlsm <br /> Cost Estimate Type:Surety Cost Basis:N.Nevada Notice Level <br /> Reclamation Quantity Summary <br /> Unit Costs <br /> Total Total <br /> Regrad. R.grsd. Total Covar Total Growth Media Total Total Total Material Haul Growth <br /> or Haul or Haul Cover PI......t Growth Media Placement Surface Scarify R-otation Ragrade or Backfill Cover Madl. Scarify Ara. <br /> Deacriplion Vokrme Coat Volume Cost V.I... Cost Area Cost Coal TOTALS Unit Cost Unit Cost Unit Cost Unit Coat Unit Coat Unit Cost <br /> ey $ ey $ CY $ acres $ $ $ $ICY $/CY $iCY $/CY $/CY $/acre <br /> 1 Waste Rock Dumps $ $ $ $ _ $ _ $ N/A <br /> 2 Tailings Impoundments $ $ $ $ _ $ _ $ N/A <br /> 3 Heap Leach Pads $ $ $ $ _ $ _ $ N/A <br /> 5 Open Pits $ $ - $ N/A <br /> 4 Quarries&Bon-ow Pits $ - $ $ $ _ $ _ $ N/A <br /> 6 Roads $ - $ $ - $ - $ N/A <br /> 7 Landfills $ $ $ $ - $ - $ N/A <br /> 8 Buildings $ $ $ _ $ _ $ N/A <br /> 9 Yards $ $ $ $ - $ - $ N/A <br /> 10 Ponds $ $ $ - $ N/A <br /> 11 Ex loragon Roads 522 $ 1,989 $ - 0.97 $ 1,680 $ 2,494 $ 6,163 $3.81 N/A $1731.96 $6.353.61 <br /> 12 Exploration Trenches $ $ _ g N/A <br /> 13 Diversion Ditches $ $ _ $ N/A <br /> 14 Sediment Ponds $ - $ $ _ $ _ $ <br /> 15 Generic Haula a/Backfill $ $ $ $ - $ - $ N/A <br /> 16 AditlDecline Backfllin 1 $ <br /> $ N/A <br /> 17 IShaft Backflling $ <br /> $ N/A <br /> TOTALS 522 1,989 0.97 $ 1,680 2,494 $ 6,163 <br /> Average Costs per CV 1— $3,811 per CY per CY I I per acre 1 $1,731.961 $1.48 $6,364 <br /> per <br /> N2/2023 <br /> c.nnuma--:ow <br /> sate s.a....w sgnn sa...a. 5 of 56 Reclamation quantifies <br />