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Technical Revision 1 to Colorado Calumet Company Incorporated <br />Permit No. M-2006-034 <br />6 June 2007 <br />6.3.3 EXHIBIT C -Mining Plan <br />(1) (o) Limited explosives will be used in conjunction with active mining at permitted <br />dig sites if rock structures cannot be mined using heavy equipment, including hydraulic <br />hammers. <br />A DH99 air track with two diesel compressors will be used to drill holes for explosives <br />along a working bench. ANFO will be used as the explosive agent with non-electrical <br />delays. <br />Two, Type 1 magazines will be used to store explosives and detonators on site in <br />accordance with mine safety regulations during blasting. Blasting will occur during the <br />approved mining period of approximately 30 days. <br />Colorado Calumet Company Inc. will accomplish the blasting and holds a current federal <br />blasting license and permit. License number is S-CO-059-33-9E-00551 and expires 1 <br />May 2009. <br />All safety requirements will be strictly enforced and adhered to. <br />6.5 GEOTECHNICAL STABILITY EXHIBIT <br />The blasting sites are located within National Forest along slopes of less than 30 percent <br />grade. The hillsides are forested except where burned by the Hayman fire of 2002. The <br />only improvements within aone-mile radius are four-wheel drive roads. There are no <br />structures within aone-mile radius. No damage will occur through seismic vibrations <br />arising from limited blasting of low intensity as long as standard blasting practices are <br />strictly followed. Peak particle velocity will not exceed Sfps. <br />Respectfully Submitted: <br />%~ <br />JO~>EPH L. DO~ <br />Operator Colorado Calumet Co. Inc. <br />