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Engineering Evaluation Report <br /> McCumber Hill Pit, Williamsburg, Colorado <br /> October 2025 <br /> Structures in Question <br /> The structures in question include Black Hills Energy overhead power lines along the <br /> south side of the site and along Highway 115 to the north as well as Qwest Phone line <br /> along County Road 11A on the southeast side of the site. Refer to Exhibit B. <br /> This pit is currentlynot used for mining operations, nor are there intentions to do so in <br /> the future. The site is primarily undisturbed with native topography and vegetation. In <br /> the event mining operations are performed on site, there will be no adverse impact on <br /> the existing overhead power lines and communication lines. <br /> Conclusion <br /> The Black Hills Energy and Qwest overhead infrastructure that traverse the site and/or <br /> are within the 200-ft buffer will not be adversely affected if future mining operations <br /> occur on site. <br /> 2 <br />