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Lewicki & Associates <br /> ENGINEERING I GEOLOGY I ENVIRONMENTAL <br /> April 11, 2022 <br /> Colorado Division of Reclamation, Mining, and Safety <br /> 1313 Sherman St, Rm 215 <br /> Denver, CO 80203 <br /> (303) 866-3567 <br /> Delivered Via Email <br /> RE: 23 Road Pit, Permit M-1979-089 <br /> Technical Revision <br /> Elam Construction is applying fora technical revision to the 112c permit for M-1979-089, better <br /> known as the 23 Road Pit. This technical revision updates the reclamation plan and bond to better <br /> align with the anticipated reclamation conditions onsite as mining is drawing to a close. The primary <br /> change brought about by this technical revision is the configuration of the groundwater lakes. <br /> Roughly 41 acres of lake distributed amongst multiple lakes will be the new reclamation plan. This <br /> change does not affect the post mine land use as it is currently approved; it is merely a <br /> reconfiguration of the total lake area. <br /> The groundwater lakes are to be split amongst the areas shown on the attached Map F-1. Four of <br /> the lakes will be permanent water bodies surrounded by rangeland. One lake, located on the <br /> Precast Concepts property, is being backfilled over time by the landowner. This backfilling was <br /> approved in previous technical revisions. The land use for the Precast Concepts property is <br /> industrial under a City of Grand Junction approved site plan (SPR-2005-08). <br /> Regards, <br /> //7/ <br /> Ben Langenfeld, P.E. <br /> Lewicki &Associates, PLLC <br /> benl@lewicki.biz <br /> (720) 842-531, ex. 1 <br /> 23 Road Pit Technical <br /> Revision 1 a Lewicki 8t Associates <br /> April 2022 <br />