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Closure Cost Estimate <br /> Expl.Roads&Pads <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.xlsm <br /> Cost Estimate Type:Surety Cost Basis:N.Nevada Notice Level <br /> Exploration Roads&Pads-Cost Summary <br /> Equipment a er a s o a s <br /> Grading Costs $639 $1,350 N/A $1,989 <br /> Cover Placement Cost $0 $0 N/A $0 <br /> Ripping/Scarifying Cost $497 $1,183 N/A $1,680 <br /> Subtotal Earthworks E1,136 2,633 3,66 <br /> 70 9 <br /> Revegetabon Cost $1,225 0 $56g 2,494 <br /> TOTALS $2,361 $3,233 $569 $6,163 <br /> Exploration Roads&Pads-Calculations <br /> Regrading Volume and Footprint Volume <br /> urM. <br /> A" <br /> br <br /> 1 <br /> h Br a, <br /> Ca s <br /> Fill v+ <br /> A� yss rue= Disturber/sope tegth:cu+o, <br /> u Dsturbed footprint width=Disturbed sees lengthy cp ononal wepe) <br /> Distua—I"area=o"ubed slope length x Road length <br /> D.. M botpnnt area•Disturbed foolpnnt—Ins Road length <br /> Assumes 20%swell <br /> Figure 1•Regrading Volume Calculatlon <br /> Will not allow dozer for slopes greater than 30% Swell Factor 1.2 <br /> For dozer regrading push distance=road width <br /> Assumes dozer push is uphill <br /> Assumes minimum push distance of 100 ft <br /> Ripping/Scarifying Calculations <br /> Minimum 1 or ripping/scarifymg time per area <br /> Number of passes=Final slope length+Grader width <br /> Travel distance=Number of passes x Road length <br /> Total hours=(Travel distance+Grader productivity)+(Number of passes x Grader maneuver•.n,� <br /> For dozer regrading assumes push distance=3 x road width <br /> Revegetation Calculations <br /> P.Lm mum of 1 acre crew time per area <br /> YZW23 <br /> wo-me <br /> Page 10 of 56 <br /> Expl RoatlS 3 Pads <br />