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2-22 <br />• The softer coal is broken and passes through perforations in <br />the cylinder sides. Harder, oversize refuse is discharged through <br />the lower end of the cylinder. This refuse will be +4" material <br />and is estimated to be one percent of the run-of-mine coal. <br />Moisture will be approximately that of the coal and is expected <br />to be between ten and twelve percent. <br />Dependent upon market conditions, Salt Creek Mining Company may <br />wash a portion of the coal processed by the rotary breaker. <br />Preliminary studies indicate that about eighteen percent refuse <br />will be generated when breaker product coal is washed. <br />The wash plant will be a 200 ton per hour heavy media coarse coal <br />cleaning plant. Prior to washing, breaker product coal will be <br />screened to remove -;" material. The -4" ±;" coal will be pro- <br />cessed, forming two separate refuse materials with their own <br />• characteristics and handling requirements. Approximately ninety- <br />seven percent of the wash plant refuse will be -4" +;" and will <br />be hauled directly to the refuse area. The remaining three per- <br />cent will be -;" and settled out in slurry ponds. Since the <br />bulk of the -;" material will be removed prior to washing, very <br />little fine refuse will be generated. <br />Two settling ponds and one decant pond will be constructed. All <br />surface water runoff will be precluded from entering these ponds. <br />Only one settling pond will be in use at any given time. Fine <br />refuse will be pumped to a settling pond. The decant pond will <br />accept clarified water from either settling pond. Water from <br />the decant pond will then be recycled for use in the wash plant. <br />When the settling pond reaches sediment capacity, the second <br />settling pond will be put into use, All water will be removed <br />from the first settling pond with a sump pump and drain, the <br />fines allowed to dry and then removed and hauled to the refuse <br />• area. It is estimated that three percent of total wash plant <br />refuse will be -;", the remaining ninety-seven percent will be <br />in the -4" +;" size range. <br />1/17/83 <br />