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COLORADO <br /> Division of Reclamation, <br /> Mining and Safety <br /> Department of Natural Resources <br /> Date: February 19,2021 <br /> To: Rob Zuber <br /> From: Zach Trujillo <br /> CC: Jason Musick,Michael Cunningham <br /> RE: Bowie No.2 Mine,DRMS File No. C-1996-083 <br /> Questions Related to Reclamation Cost Estimate (RCE) <br /> Rob, <br /> As requested, I have pulled costs associated with some of the more common tasks and equipment, <br /> specifically to those associated with the Bowie No. 2 Mine (Bowie). Generally, costs associated with <br /> equipment tend to increase and so it should be expected that the next site-wide cost estimation will <br /> increase as well assuming no major bond releases have occurred since the last Midterm Review. <br /> Additionally,based on our discussion,the second question in your original memo has already been <br /> satisfied and will not be included in this memo. Please see the following tables and associated comments: <br /> Equipment Tasks <br /> Dozer: D10T- 10SU <br /> Change <br /> Year Ownership Cost ($) Operating Cost($) Total ($) (%) <br /> 2018 150.3 153.4 303.7 - <br /> 2019 159.05 159.4 318.45 4.86% <br /> 2020 185.99 166.94 352.93 10.83% <br /> 2021 231.87 169.6 401.47 13.75% <br /> Ripper(Ripper Cost Only) <br /> Year Ownership Cost ($) Operating Cost($) Total ($) Change (%) <br /> 2018 21.88 13.3 35.18 - <br /> 2019 22.27 13.35 35.62 1.25% <br /> 2020 22.51 13.63 36.14 1.46% <br /> 2021 25.19 13.74 38.93 7.72% <br /> • This cost is for the ripper attachment only. The ownership and operating costs for the ripper <br /> attachment are added to the ownership and operating costs of a dozer for a ripper task in CIRCES. <br /> Questions Related to Reclamation Cost Estimate(RCE)Memo February 19,2021 <br /> o�•COlO <br /> 1313 Sherman Street, Room 215, Denver, CO 80203 P 303.866.3567 F 303.832.8106 http://mining.state.co.us I * * <br /> Jared S. Polis, Governor I Dan Gibbs, Executive Director I Virginia Brannon, Director * 18776 <br />