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Lewicki & Associates <br /> ENGINEERING I GEOLOGY I ENVIPONMENTAL <br /> December 8, 2022 <br /> Jason Burkey <br /> United Companies <br /> 2273 River Road <br /> Grand Junction, CO 81505 <br /> Kattenberg Pit Permit No. M-2004-017 <br /> Slope Stability Analysis and Nearby Structures <br /> United Companies is taking over the Kattenberg Pit in Grand County, Colorado. This permit (M- <br /> 2004-017) is being transferred, requiring new structure agreements to be obtained between the <br /> applicant and structure owners within the affected area of the mine. Agreements for all structures <br /> within 200 feet of mining have been pursued by the applicant, but not all have been obtained. This <br /> slope stability analysis satisfies the Mineral Rules and Regulations for Construction Materials Rule <br /> 6.4.19(b)that requires an engineering evaluation demonstrating that structures should not be <br /> damaged by mining activities in the case that a structure agreement cannot be reached. While there <br /> are various structures within the 200 feet of affected area from the permit, only the nearest <br /> structures to mining were evaluated for slope stability purposes. It can be assumed that any <br /> structure not covered in this analysis will not be affected as they are located greater than the <br /> minimum setback from mining identified in this report. <br /> 1 . Nearby Structures and Existing Agreements <br /> Structure and setback agreements have previously been obtained for the structures and utilities <br /> within 200 feet of the affected area of the mine. The original agreements can be found in the <br /> existing DRMS permit and subsequent revisions. Attached is the Nearest Structures Map which <br /> provides the location in relation to mining of the structures closest to mining, which are listed in <br /> Table 1. <br /> Kattenberg Pit Slope <br /> Stability 0 Lcwicki&Associates <br /> December 2022 <br />