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<br />• higher capacity. <br />2. Under present mix specifications this production <br />rate results in a quarrying rate of approximately <br />305,000 cubic yards of material from this quarry per <br />year. <br />3. Waste kiln dust (CKD) volume will remain constant at <br />approximately 117,000 cubic yards per year. Process <br />refinements may change this rate of production. <br />9. All CKD will be landfilled in the quarry. In <br />actuality, we are attempting to develop a market for <br />the better use of this dust. <br />5. The quarry configuration is based on efficient usage <br />and the limitations of current quarrying equipme~~t. <br />The drill has an effective depth limitation of 5~) <br />feet, and the dragline has a maximum dump point at a <br />horizontal distance of 120 feet, and a vertical <br />distance of 80 feet. Both pieces of equipment will <br />be replaced several times before the end of the <br />operation, and the plans changed to reflect <br />efficient usage of the new equipment. <br />6. No higher and better use for the quarry will be <br />found during the life of the mine operations. <br />7. Constants used in the calculations axe as follow:;: <br />A. Average weight of quarry limestone in place is <br />2.2 T per cubic yard. <br />H. Average density of landfilled CKD is 45 lb. per <br />cubic foot. <br />C. Swell factor of excavated stripping is 1.5. <br />Meth of Mining Operation <br />The existing mining operation consists of removing any <br />topsoil by scraper or dragline, then drilling the overburclen, <br />loading the drill holes with explosive, and blasting. The: <br />broken rock is then piled to the side by dragline. <br />The rock used as raw material is then removed in <br />stratigraphic layers, or bands, which are defined by their <br />chemical characteristics. This removal of each layer in <br />sequence is also by drilling and blasting, with the broken <br />rock being loaded onto quarry haul trucks by front-end <br />loader. Roads are maintained by grader and water truck. <br />W er Diversions and Impoundment <br />• As explained under Exhibit C, an unnamed drainage crosses the <br />A-band quarry (map sheet 6, bcc-1360). Flow in this drainage <br />during the irrigation season is caused by seepage from the <br />15 <br />