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• <br />Through the use of the main sump being developed in conjunction with <br /> <br />the East Lease off of the 1st East ~4ain, it is expected that a certain amount ~ <br />of sediment ~.vill be trapped in this sump 6e cause of the quality of the water- ~ -_- <br />to be pumped into it. The upper portion of the sump, or approximately 20 <br />percent, will be partially filled by the ~,+ater and is, therefore, not expected <br />that sedimentation will occur in this area. Therefore, only 4.21 acre feet <br />will be used in calcu]ations for sedimentation. ,Allowing the sump to fill to <br />60 percent of full capacity •r+ould give us a volume of approximately 2.57 acre <br />r"eet. At 120 lbs/cu. ft for the density of the ~r:aterial, approximately 6,717 <br />tons could be stored in the space available. (This density `figure is taken <br />from the specific gravity for clayey-sands at 1.9;.) Under normal operations <br />it is expected that 10 tons/hour of fines will be deposited in the sump by <br />particles setiling-out of the water. <br />At that rate, apprcximately 672 hours of deposition time is available. <br />• <br />Operating on a 14-hour workday, this ~++ould be equivalent to 4° operating days. <br />After the sediment has been trapped in the sump, it will be necessary to clean <br />the sump. This is expected to be done by the use of a Blusher. A Blusher <br />is a cable and hoist, pulling a plow or bucket. This cable will be installed <br />v+ith a sheave or pulley at the bottom of the eastern-most entry of Sump A. <br />The cable and sheave will be left in place so that the fine sediment can be <br />loaded out of the sump once each month or two as it is found to be needed. <br />The material will be transported outside and stockpiled near the working <br />stockoiTe and allowed to dry. It will then be mixed with the coal and shipped <br />'3'~' i ter.-u~. Mn'su,. ~.r4 ~" +4pN"2 a,f lu _.~ a -' <br />