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Lewicki & Associates <br /> ENGINEERING I GEOLOGY I ENVIRONMENTAL <br /> October 21, 2021 <br /> Amy Yelldell Nov ® ��21 <br /> Colorado Division of Reclamation, Mining, and Safety <br /> 1313 Sherman St, Rm 215 DMSION OF RECLAMATION <br /> Denver, CO 80203 MINING&SAFETY <br /> RE: Spring Creek Mine M-1984-097 <br /> Technical Revision—Change to Mining Plan Regarding Disturbance Area <br /> Ms. Yelldell <br /> United Companies is providing the attached technical revision to expand their disturbance area and <br /> update their bond for Spring Creek. The mining plan and maps have been revised to reflect both the <br /> new mining extents and reclamation of the entire site. The mining area will be increased to the <br /> northwest and through to the adjacent gravel pit to the east in accordance with the previously <br /> approved revision. <br /> Regards, <br /> Ben Langenfeld, P.E. <br /> Lewicki &Associates, PLLC <br /> (720)842-5321, ex. 1 <br /> bent@lewicki.biz <br /> Spring Creek Pit ®Lewicki&Associates <br /> September 2021 <br />