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-- United States De <br />partment of the Interior <br />Bureau of Land Management <br />Royal Gorge Field Office NTAM. A RICA <br />3028 East Main Street <br />Canon City, Colorado 81212 <br />In Reply Refer To: <br />3809 (COF020, SSC) <br />JAN 21 2011 <br />Mr. Boyd Astemborski , <br />Destiny Mining, LLC <br />P.O. Box 51314 <br />Colorado Springs, CO 80949 <br />Dear Mr. Astemborski: <br />During preparation of the NEPA Environmental Assessment, it has become evident that additional data will <br />need to be provided by Destiny Mining, LLC, in order for the BLM to adequately analyze any potential for <br />significant noise impacts sociated with hproposed mining operation. On November 12, 2010 a conference <br />call was held between BLM and representatives of Destiny Mining, LLC to preliminarily discuss potential noise <br />sources and mitigation, as well as the details outlined below. <br />It has been determined that a sustained 55 decibel limit for noise at the boundary of operations in closest <br />proximity to a residential dwelling is the criteria that will be used for assessing potential significant noise <br />impacts. This stipulation is a result of extensive review of many local regulations and policies, as well as <br />consideration of the established industry strategies for noise mitigation. <br />Please provide this office with a defensible approach for how the proposed mining operation will be able to meet <br />these noise criteria. At a minimum, elements provided should consist of an engineered concept of noise <br />emissions associated with mining and transportation activity, a comprehensive site plan for implementing noise <br />mitigation measures and methods that will be employed to ensure that the noise mitigation is being implemented <br />successfully. It is BLM's intention to have reliable details of the proposed operation's noise regime, in order to <br />have a higher confidence level in determining the associated level of impacts. <br />i <br />Once this information is received by this office, the Environmental Assessment can be finalized. <br />Please contact Stephanie Carter at (719) 269-8551 if you have any questions regarding this letter. <br />Sincerely, <br />'oe ?651? <br />Keith E. Berger <br />Field Manager <br />/ Royal Gorge Field Office <br />cc: David Bird <br />Division of Reclamation, Mining and Safety <br />1313 Sherman Street, Room 215 <br />Denver, CO 80203