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<br />EXHIBIT D -- MINING PLAN <br />(a) Description of methods of mining. <br />Mining will progress as it has on site for the past twenty years, a typical surface mine: highwall <br />technique of drilling, blasting, and front-end loader muck and carry to on site mobile crushing <br />circuits. Drilling benches range from 30-40 feet in height and blasthole configurations are ]4' x <br />14' burden and spacing, 4" holes for powder factors between .25 and .35 pounds per ton of rock <br />shot. ~flhe.,TocJrigal Rovision #3, <br />Blasting Monitoring Program which was approved by DMG in 1996. Please refer to the mine <br />file for the details of this blasting control program. Shot rock is bulldozed off the highwall <br />contact to a muckpile directly below the working face, then picked up with a front end loader <br />and carried to the nearby crushing and screening systems. The crushing and screening system <br />includes arip-rap separation grizzly, primaryjaw crusher, triple deck screen and secondary cone <br />with supporting conveyors for material stockpiles. All mining and process operation. are <br />performed in accordance with a site fugitive dust program approved by the Colorado Dept. Of <br />Health Air Quality Control Division for site and process equipment dust control. Stockpiles of <br />crushed aggregate are kept wet to minimize fugitive dust during loading and haulage operations. <br />Highway trucks will be used to transport product from the site. <br />In accordance with Technical Revision #005, approved by DMG in 1996, the operator may have <br />an asphalt batch plant on site for the manufacturing of asphalt road materials. Such a plant will <br />meet all requirement of air pollution control regulations and may be on site periodically or as a <br />K permanent component of the production facility. Also in accordance with TR #005, the operator <br />° may have a stockpile of up to 200 tons of waste concrete and/or asphalt road material which will <br />be used in a recycling operation resulting in reprocessing of these materials into additional road <br />base or asphaltic products. In accordance with Technical Revision #002, a gravel <br />washing/screening procedtue may be employed on the site. <br />~) <br />waste is <br />(c) water diversions and impoundments -- Stormwater Management Pleu--please refer to the <br />Stormwater Management Plan Map and the attached narrative describing the diversion of the <br />upland watershed to the north of the mining ground onto 30 acres of affected land owned by the <br />mine operator, specifically for the purpose of handling stormwater flows. The storTrrv~ater map <br />shows the locations of four other retention ponds and storm ditches which will convey and retain <br />storm flows to achieve a zero discharge at the Ttmnel Drive location. The stormwater plan has <br />been reviewed and approved by a licensed structural engineer. Included with this application <br />package is engineered and stamped drawings showing the construction techniques for the <br />sediment ponds, ditches, and spillways utilized therein. <br />(d) size of the mining area--the highwall mining operation keeps the total acreage exposed to a <br />