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LewiCki & Associates <br /> ENG€€VEER€NG I GEOLOGY I ENVIRONMENTAL <br /> August 19, 2021 <br /> Amy Yelldell <br /> Colorado Division of Reclamation, Mining, and Safety <br /> 1313 Sherman St, Rm 215 <br /> Denver, CO 80203 <br /> RE: Cerise Mine M-2010-058 <br /> Technical Revision —Change to Mining Plan Regarding Phases <br /> Ms. Yelldell <br /> United Companies is providing the attached technical revision in response to your inspection report <br /> dated April 14, 2021 for the Cerise Mine. The mining plan and maps have been revised to reflect <br /> both the new mining sequence onsite and the needed flexibility within the operation to mine areas <br /> as needed within the delineated disturbance area. <br /> Regards, <br /> Ben Langenfeld, P.E. <br /> Lewicki & Associates, PLLC <br /> (720) 842-5321, ex. 1 <br /> benl@lewicki.biz <br /> Cerise Mine <br /> June 2021 � Lewicki&Associates <br />