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disturbing the pond and clarification process. <br /> The underf low from the hydroclone, which contains <br /> the middling solids removed by the hydroclone, <br /> discharges by gravity to the raw coal sump of the <br /> coal preparation plant. <br /> Mine drainage containing suspended solids less than <br /> 35 mesh can be bypassed by gravity flow directly to <br /> the the preparation plant's 55 foot diameter refuse <br /> thickener, to be used as preparation plant make-up <br /> water. The refuse thickener underflow goes to the <br /> disc filters for dewatering, then to the refuse <br /> conveyor belt. <br /> Instrumentation for the treatment plant includes a <br /> control panel; alarm/indicator lights for hydroclone <br /> pump agitators and tank levels; local on/off <br /> switches for pumps and agitators. Audible alarms <br /> are provided for high/low tank levels and motor <br /> trips. <br /> During periods in which the preparation plant is not <br /> functioning, during maintenance, or periods of high <br /> flow the 016 ponds will be used. <br /> We anticipate further discussion and good input from the MLRD as <br /> details of the treatment plan are finalized. <br /> Yours truly, <br /> Diane Delaney <br /> Mid-Continent Resources <br />