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r ~:.`. :. consistent will our best estimates of lower bench widths at this point in time. The. ... - __ <br />- .. - .. . - -.topsoil stockpile configuration at the top of the highwall will act as an effective - _ . - - - <br />"safety bench" at the top of the highwall configuration and the 2.5 : 1 maximum ~ - - <br />-- slope of the topsoil stockpile/benn will allow for easy escape-way from the azea <br />without the need for additional ramps. <br />] 2. A portable crushing, screening and/or sizing appazatus may be utilized on the site <br />and will be sited at various locations within the ore extraction zone between the <br />working face and the product stockpile location as shown on the Mine Plan Map <br />Cc. Due to the portable nature of these pLmtss they may be located at any point <br />along the strike of the marble extraction zone from the existing lower working <br />face to the nortbem end of the mining area through the life of mine operation. In <br />addition, mobile stacking conveyor systems may be employed to transport rock <br />product from cnuher/screening operation to product stockpile location at air <br />point along the eastern aspect of the ore body from the southern area of the pit <br />near the current lower pit location to the norflrern end of the pit at maximum mine <br />reserve extraction operations. <br />13. Explosives use at this site will be regulated under MSHA and ATF rules <br />regarding transport, storage, and use. The contract mining company selected for <br />mine development may elect to utilize MSHA approved portable magazines to <br />store explosives on site, or the contract miner may prefer to transport explosives <br />to the site as needed, as blasting operations will not occur on a daily basis. In <br />that case, the contractor must use approved transport boxes (non-sparking <br />materials, usually Aluminum) for all explosives transport. MSHA approved <br />portable magazines are common in use throughout Colorado and are usually <br />located within the main operational staging azea associated with portable <br />egwpment stor-age, main ~+.rP, and worker parking areas. This will likely be in <br />the azea of the lower main staging area located drrectly east of the lower pit area <br />as noted on the mine plan map. Magatiae locations are site speci&c with regads <br />to minimizing exposure to weather related hazazds(lightning), public access, fly <br />rock during blasting operations, an<i worker exposure. Colorado Marble, Inc., <br />commits to pre-startup conference with contract mining personnel to ascertain the <br />safest and most secure location on site for explosives magazine location selection. <br />In the event that MSHA approved on site portable magazines aze not employed, <br />appropriate truck transport lock boxes will be required by the drilling/blasting <br />contractor. <br />14. Temporary waste piles will be limited to small volume stockpiles neaz process <br />operations, such as screen plant operatioq that produce a fraction of product <br />deemed unsuitable for shipping off site. These materials may be stockpiled neaz <br />the operating face or screen plant for a short period (a few days to several weeks) <br />or may transported to the southern end of the lower staging azea prior to <br />placement on the main waste rock pile. Temporary waste rock piles will not <br />exceed 5000 tons in volume prior to permanent placement on a designated waste <br />rock pile- Temporary waste rociQ7iles will be limited to small volume (kss than <br />