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will not be required. A 12-inch (maximum) diameter steel casing will be placed and grouted in the ~drillhole. The <br />borehole surface installation will be protected by a section of CMP, buried so that 2-4 feet extends above ground <br />• level. The surface installation will be properly grounded to comply with applicable MSHA requirements. One or <br />more concrete-filled steel posts, extending four-feet above ground level will mark and serve to further protect the <br />surface installation. An 8-inch (maximum) steel or welded HDPE transfer pipeline connecting the Borehole to the <br />existing Site 109 Discharge Pipeline will be trenched and buried approximately 6-feet deep along the existing <br />Haulroad. The pipeline will enter the Borehole below grade, and control valves will be used to control flows. <br />Fish Creek Dewatering Wells Treatment System and Transfer Pi elp fines - At the Fish Creek location, submersible <br />pumps draw from an underground sump where mine water inflows that have been intercepted and routed underground, <br />as shown on Map 16 (Mine Water Balance Map), collect. Coal fines slurry from the Washplant Thickener Underflow <br />Borehole also discharges to the underground mine water storage area. Prior to entering the sump, the none water and <br />coal slurry decant water pass through an network of abandoned and sealed mine workings which facilitate settling of <br />any suspended solids prior to collection and pumping of mine water to the surface. <br />Installation of the original transfer/recycling system from the Fish Creek Dewatering and Water Treatment Facility <br />required the following activities: 1) Installation of a pumping system, 2) Electrical and control system <br />modifications, 3) Installation and tie-in of the 10,700 foot Fish Creek/Barricade Chamber Transfer Pipeline from <br />the western settling cell to the Barricade Chamber/FCM-2 site, and 4) Installation of manholes along the waterline <br />for installing "T's" for stock-tank feeds. Installation of the pumping system required construction of a concrete pad <br />as a foundation for the pump and control building. The pad slopes towards the existing treatment cells, or a drain <br />pipe may be installed, so that any runoff from the pad will drain to the cells. A suction line from the pump in the <br />western settling cell allows treated mine water to be pumped to the Barricade Chamber/FCM-2 Borehole or <br />IORT/FCM-2 Transfer Pipeline. Whether in mine water recycle or direct discharge mode, the water treatment <br />system will continue to function, to treat mine water for use underground, or to meet applicable effluent limitations <br />for direct discharge to Fish Creek. Direct discharge occurs through a gated discharge pipe in the final treatment <br />cell, with discharge to the outlet channel and flow-measurement flume discharging to Fish Creek at CDPS Outfall <br />115. The discharge line from the transfer pump connects to the two mine water transfer pipelines (Fish <br />Creek/Barricade Chamber, and Fish Creek/Area 1 Pit), with valuing to control flow and routing. <br /> <br />MR08-231 2.05-SOa 11 /20/08 <br />