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Evaluation of CR82 with ECOSA slope stability <br /> The eastern portion of CR82 gets within 670 feet of the toe of the East Cresson Overburden <br /> Storage Area(ECOSA). The final buildout of the facility will actually be closer to the segment <br /> of CR81 located immediately to the south of the intersection of Beaver Valley Road and CR82. <br /> Since the ECOSA worst case stability would affect CR81 before CR82, the ECOSA stability is <br /> evaluated for CR81 (Structure 4). <br /> Evaluation of CR82 with blastine activities in Wildhorse Extension and North <br /> Cresson Mine <br /> Gary Horton is a CC&V Senior Environmental Coordinator who conducts all blast monitoring <br /> and related work in and around the permit area. He has provided a letter report of the original <br /> blast design criteria, the pre-blast surveys, monitoring information and results. This report and <br /> related information is included in Attachment T-3. <br /> As can be seen by the Map included in Mr. Horton's letter report, two seismic monitors are <br /> located north of the North Cresson Mine (Globe Hill and WHEX), one at Hoosier Pass and the <br /> other at Deadhorse Claim. These monitors record blast information 24 hours per day. All <br /> measurements at the monitors have been well below the design limit of 0.5 inches per second. <br /> The monitors are set to trigger at 0.05 inches per second, which is ten times lower than the <br /> design velocity. <br /> In addition to this information, Teller County has never noted a problem with CR82 related to <br /> blasting activities. <br /> 9 <br />