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COLORADO <br /> \/ Division of Reclamation, <br /> ® Mining and Safety <br /> Department of Natural Resources <br /> Date: February 3,2023 <br /> To: Robin Reilley <br /> CC: Jared Ebert and Amy Eschberger <br /> From: Zach Trujillo <br /> RE: Trapper Mine,DRMS File No. C-1981-010 <br /> Permit Revision No. 11 (PR-11)Reclamation Cost Estimate <br /> Robin, <br /> As requested I have reviewed Trapper Mine's(Trapper)reclamation cost estimate (RCE)associated with <br /> PR-11 and have updated the Division's site wide RCE. Trapper's PR-II proposes to update the mining <br /> and reclamation plans for the upcoming permit term. This includes updates to the L,I and J-Pits along <br /> with the inclusion of a new pit,C-Pit as well as associated support ancillary disturbances. <br /> The new total amount for the updated Trapper RCE is$41,744,040.00.This amount is an overall <br /> reduction from the Division's previously calculated RCE. The reduction can be summarized by the <br /> following: <br /> 1. Truck/Excavator support equipment and%utilization were updated as necessary to ensure <br /> accuracy and consistency across all tasks and Trapper's Table A-2.1. This led to a total net <br /> decrease in operation cost for support equipment associated with Truck/Excavator tasks. <br /> 2. Scrapper support equipment and%utilization were updated as necessary to ensure accuracy and <br /> consistency across all tasks and Trapper's Table A-2.6. This led to a total net decrease in <br /> operation cost for support equipment associated with Scrapper tasks. <br /> 3. Scrapper volume units of material quantities were updated from CCY to LCY as necessary to <br /> ensure accuracy and consistency across all tasks. This led to a total net decrease in operation time <br /> associated with Scrapper tasks. <br /> 4. Revegetation task methods were updated to ensure accuracy and consistency across all tasks and <br /> with Trapper's approved PAP. <br /> 5. Removal of duplicative tasks,most notably with Borehole tasks drill rig equipment application. <br /> 6. Removal of requested tasks that were never built and removed from Trapper's approved PAP. <br /> For rational and more information,please refer to the following comments to Trapper's comments from <br /> the letter dated January 26,2023 regarding the Division's original RCE.Attached(Google Drive link)is <br /> the updated PR-I I RCE. <br /> Trapper Mine RCE Memo February 3,2022 <br /> 4F COlO <br /> �F <br /> 1313 Sherman Street, Room 215, Denver, CO 80203 P 303.866.3567 F 303.832.8106 http://mining.state.co.us <br /> Jared S. Polis, Governor I Dan Gibbs, Executive Director I Virginia Brannon, Director * 1876 <br />