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Blasting will be performed by a licensed third party contractor. "The Impacts <br /> of Blasting Operations and Recommended Practices and Controls for Golden Clay <br /> Mine Operation" is provided herein as Exhibit 6.4.4-1 was prepared by Patriot Powder <br /> LLC. PPL's plan proposes using no more than 50 pounds per delay thus keeping the <br /> ground vibration below 0.2 in/sec which is less than the 0.5/sec damage threshold <br /> limit. This charge weight will not damage structures at or beyond 800 feet or more <br /> from the charge. At distances of 1700 ft. or greater, the ground motion will not <br /> exceed 0.03 in/sec. The new nearest water well is approximately 3300 ft. from the <br /> blast. At this distance, ground vibration will not exceed 0.020 in/sec thus having no <br /> negative impacts to the water wells. <br /> Potential damage to traffic and nearby roads manifests as flying debris. <br /> Standard precautions to prevent any chance of flying debris is to not blast within 100 <br /> ft. of a roadway and to clear traffic when blasting within 1000 ft. of a roadway. <br /> Since CO Hwy 93 is over 1900 ft. from the blasting area the chance of flying debris is <br /> very unlikely. The most likely impact may be traffic slowing to observe the post <br /> blast effects such as the clearing dust cloud and sliding of the target rock. <br /> Access Roads <br /> The historic access onto Hwy 93 has served the mine many decades. With <br /> infrequent mine campaigns and low production volumes, the historic access will <br /> continue to be used by the applicant. In addition, the applicant is proposing an <br /> additional and optional access north to West 56th Avenue to be developed in the <br /> event CDOT's plans for Hwy 93 improvements result in access restrictions. <br />