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hhe M.n"Cowper% Jun.17,2D19 <br /> Rpuhr(112d)Opera Recta-Perm)Ap'.-Pachpe <br /> Project Name:Pitch Mine Reclamation Project-Reclamation Plan <br /> Date of Submittal:March 1,2019 <br /> File Name:SRCE_Version_1_4_1_016c 2019-06.06—amh User 3 Upda s.xlam <br /> Model Version:Version 1.4.1 <br /> Cost Oata:Use r Data <br /> Cost Data File:SRCE_Coat_data-USR_1_12_20lM5-14.xlsm <br /> Cost Estimate Type Surety Cost Basis.Northern Nevada <br /> Under round Openings Cost Summary <br /> wpm <br /> oats 8 D«lines Plugging 30 n s0 a 3D s So <br /> arc eaaxluco�o� sa $o so <br /> aping b0 f0 A SD <br /> TOTALS f0 f0 W f0 <br /> Underground Openings-Calculations <br /> Adits,Declines and Portals-Volume Calculations <br /> —Width(WF--+1 <br /> Concrete Cover/Bulkhead Volume Calculation <br /> eight iMl 031E Means"Illy C onstruclion Cost Data 120041 <br /> H� Eztimage crier/pWhhead Mrckmss <br /> Assumes Thal al cor�wNe vurks are renlorced <br /> ProducliMy for crewlrom Means Heavy Construction Cosl Data 120041 adlu—for zupamsron <br /> (adirwsatl in Mhc.Cosh)apt DaHs-Bacon Wage Rates <br /> Assumes 1 B In thch shb <br /> 7lasa Cross-Sectional Area(A)=W x H <br /> of Buulkhekhead ISI Volume of Concrete Bulkhead=A x B <br /> Depth to Volume of Backfill=A x D Backfill Calculations <br /> Bulkhead(D) <br /> Uses 1 large and 1 small dozer for ad r bachl II <br /> Assumzz ne+a00 tool Wzh <br /> Assumes 50 mnlhr.—Nay <br /> Uses Iruch a loader bad,haW place tkets br spans <br /> Concrehcap.11Y lS feel Mick.unforced,u math supporletl. <br /> n oonorele cap is asee.a wre mfaNdrwhlw�Ms on 1p mrap. <br /> rtles Mat al concrata works era ranywcetl <br /> n bacMa s as scam na <br /> Carpemerral. IFrhae:. ob per hoar <br /> Shah Volume Calculations <br /> d=Diameter <br /> Radius(r)=I/W <br /> H=Shaft Cross-Sectional Area(A)=Trr2 <br /> Depth Volume=A x H <br /> Page 2 of 3 HOMESTAKE MINING COMPANY <br /> 62 of 164 <br />