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Present System <br />1. "White pipe" conveys flow from underground workings to the <br />surface through the rock tunnel. <br />2. Mine water is flocculated on leaving the tunnel. <br />3. Mine water flows to the three -pond series of Outfall 016 for <br />settling prior to discharge to Dutch Creek. <br />Underground Sizing Screen <br />4. Underground grit screen removes coarse solids. <br />Water Treatment Plant <br />ATTACHMENT B <br />Process Flow Description <br />[See Process Flow Diagram - Attachment A] <br />Note: Numbers Correspond to Description <br />5. Mine water is routed (at valve box) through pipeline to <br />recycle sump /hydrocyclone of mine water treatment plant *. <br />6. Underflow from recycle sump /hydroclone, containing middling <br />solids, goes into the coal preparation plant cycle. <br />(Alternative: underflow goes to 001 ponds.) <br />Note: Calculations re. 001 ponds. Attachment E. <br />7. Overflow from the recycle sump /hydroclone, containing very <br />fine ( -200 mesh) solids proceeds to flocculation, then to <br />"finishing" (i.e. settling of fine solids) in sediment pond at <br />outfall 020 (Alternative: 001 pond(s) used for "finishing") <br />Note: Calculations re. 020 pond. Attachment D. <br />Calculations re. 001 ponds. Attachment E. <br />