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Colorado Sand Company LLC <br /> Kersey Mine <br /> Rule 6.5 —Geotechnical Stability Exhibit <br /> (1) On a site-specific basis, an Applicant shall be required to provide a geotechnical <br /> evaluation of all geologic hazards that have the potential to affect any proposed <br /> impoundment, slope, embankment, highwall, or waste pile within the affected area. A <br /> geologic hazard is one of several types of adverse geologic conditions capable of causing <br /> damage or loss of property and life. The Applicant may also be required to provide a <br /> geotechnical evaluation of all geologic hazards, within or in the vicinity of the affected <br /> lands, which may be de-stabilized or exacerbated by mining or reclamation activities. <br /> (2) On a site-specific basis, an Applicant shall be required to provide engineering stability <br /> analyses for proposed final reclaimed slopes, highwalls, waste piles and embankments. <br /> An Applicant may also be required to provide engineering stability analyses for certain <br /> slopes configuration as they will occur during operations, including, but not limited to <br /> embankments. Information for slope stability analyses may include, but would not be <br /> limited to, slope angles and configurations, compaction and density, physical <br /> characteristics of earthen materials, pore pressure information, slope height, post- <br /> placement use of site, and information on structures or facilities that could be adversely <br /> affected by slope failure. <br /> T/ <br /> \ <br /> ` 1 RC November 27, 2023 <br />