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COLORADO <br /> Division of Reclamation, <br /> Mining and Safety <br /> Department of Natural Resources <br /> July 10, 2024 <br /> Neil Whitmer <br /> Holcim—WCR, Inc. <br /> 1687 Cole Blvd., Suite 300 <br /> Golden, CO 80401 <br /> RE: Financial Warranty Increase, Revision No. SI-1, Irwin/Thomas Mine, Permit No. M-2016-054 <br /> Dear Mr. Whitmer, <br /> On July 10, 2024 the Division of Reclamation, Mining and Safety (Division/DRMS) increased the current <br /> Financial Warranty for the Irwin/Thomas Mine (M-2016-054) to $8,260,499.00, in accordance with Rule <br /> 4.2.1 of the Mineral Rules and Regulations for the Extraction of Construction Materials. This is an <br /> increase of$84,295.00 from the currently held amount of$8,176,204.00. <br /> The surety increase is based on the Operator's cost estimate for installing the riprap protection on the <br /> side slope of the pit located within 400 feet of the river provided in TR-2 Adequacy Review Response <br /> No. 2 dated July 9, 2024. <br /> The Division ordered amendment of the current Financial Warranty, or submittal of a new Financial <br /> Warranty reflecting the increase, is due within sixty (60) days from the date of this letter, September 8, <br /> 2024. Failure to post the additional required Financial Warranty within sixty (60) days may result in the <br /> Division pursuing enforcement actions. <br /> Please make arrangements with Sara Stevenson-Benn at the Division's Denver office for submittal of <br /> the financial warranty. Any other questions regarding completion, execution and/or submittal of <br /> financial warranty forms should also be directed to Sara at sara.stevenson-bennC@state.co.us. <br /> If you need additional information or have any questions, please contact me by email at <br /> Patrick.lennberg(@state.co.us. <br /> Sincerely, <br /> a-� <br /> Patrick Lennberg <br /> Environmental Protection Specialist <br /> Enclosures: Cost Estimate Pit Side Slope Protection <br /> OF COlO <br /> 1313 Sherman Street, Room 215, Denver, CO 80203 P 303.866.3567 F 303.832.8106 https://drms.colorado.gov/ <br /> Jared Polis, Governor Dan Gibbs, Executive Director Michael A. Cunningham, Director I y �\ O <br /> *1876�` <br />