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process 10,000 tons per day or 2.5 million tons of coal per year. <br />Basin estimates that 11 gallons/raw ton for make-up water is <br />required in the processing, while utilizing 20.1 gallons/raw ton. <br />7n the event that all of the additional make-up water is acquired <br />from the river, Basin would consume 84.4 acre-feet annually. The <br />recycling of thickener slurry through the New Elk mine workings <br />will decrease the amount of water consumed from the Middle Fork of <br />the Purgatoire. <br />Approximately 856,048 tons were processed through the <br />preparation plant during 1993. Approximately 52.81 acre-feet were <br />used in the preparation plant at the New Elk Mine. Metering of <br />water taken at the New Elk Mine for domestic use was calculated as <br />0.25 acre-feet for 1993. <br />Bathwater requirements, based on 25 employees at the <br />preparation plant and a consumption of 100 gallons per day per <br />person is 2,500 gallons. <br />Sedimentation Control. Changes to the surface water <br />regime during mining will include an increase in flow to the <br />surface drainage system from the pumping of mine .inflows, and a <br />) change in the peak hydrograph of waters flowing through the <br />disturbed portions of the permit area. Changes in the amount of <br />flow will vary due to an increase in the disturbance area and <br />greater runoff, but downstream, the presence of sedimentation ponds <br />will decrease the peak and extend the release of these waters to <br />the Middle Fork of the Purgatoire over a longer period of time than <br />a typical storm event. Qualitative changes will include minor <br />increases in total dissolved solids (TDS) from increased weathering <br />of disturbed areas. The increased disturbance will result in an <br />increase in total suspended solids (TSS) in surface waters within <br />the disturbed area, but an overall lower TSS level in surface <br />waters below the sedimentation ponds. <br />The plan for the control of surface water across the New Elk Mine <br />facilities area is shown on Map 13, Sediment and Surface Water <br />Control <br />1(856,048 tons) x (20.10 gal/ton) + (325,851 gal/acft) = 52.8 acre feet A <br />2.05-60 (revised 05/11/94) ~ ^INj <br />3)q9 <br />