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1996 Annual Hydrologic Report <br />• Page 6 <br />the 109.8 gpm measured. <br />Inflows and conductivity were showed more variation than normal at the Roadside North Portal this <br />Yeaz. Location 1 is from underdrains in the portal decline and has an alluvial source. The variation <br />in conductivity is not unusual for the site. The higher flow may reflect the difficulty of measurement <br />at this site. Location 7 is no longer accessible due to the area being sealed. Location 8 represents <br />water in an old portion of the mine. Dewatering of this sealed azea is random and not measured. <br />Flow at this location is estimated by subtracting the measured inflows from the average September <br />discharge. Locations 2 thru 7 aze typically affected by handling within the mine. Water that is <br />channeled better may have less evaporation and show higher flow rates and lower conductivity. <br />Location 9 showed the typical yeaz after mining reduction in flow. New locations 10 thru 12 <br />represent areas that were mined during the Yeaz plus flow from location 9. Water used for <br />consumptive use during the Yeaz was not included in the flow measurement. See the consumptive <br />use section of this report for further information. The mass average pH and conductivity for these <br />inflows was 8.2 and 2308 urnhos/cm and the averages for the mine dischazge were 8.4 and 2289 <br />umhos/cm respectively. Similaz quality measurements between measured inflows and dischazges <br />may indicate a more accurate balance of flows between location 1 and location 8. The variation in <br />the monthly average discharges is primarily due to the fluctuation in the dewatering schedule at <br />location 8. <br />• <br />Consumptive iJse <br />A monthly listing of domestic water usage is shown on data page CA-4. The monthly billiltg rPrnrds <br />for part of the year were lost in the mi ership shuffie and the Town of Palisade could not <br />supp y me wi ~T e i ormation. Estimates were made from before and after readings. Meter 1 <br />supplies the buildings neaz the Roadside South entrance gate. Meter 2 supplies the preparation plant <br />and the Roadside South office and bathhouse. The Town of Palisade fixed their meter this yeaz after <br />January 1996. Meter 2 information prior to January 1996 is their standazd estimate that they were <br />billing us for. It appeazs that it was worth their time to repair the meter. Domestic water used in the <br />plant is a calculated number. Meter 3 supplies the Roadside North facilities but has not been hooked <br />up since operations resumed. <br />Mine water is wed underground for dust suppression in the mining process and on roadways. Water <br />wage underground is not measured but is being estimated. The mine water is also wed for process <br />water in the prepazation plant. The water circuit in the plant is closed but leaves the plant as added <br />moisture in the coal and refuse. Mine water wage for the Yeaz is given on data page C-4. Water <br />added to the coal during the mining and processing can be roughly calculated from coal moisture <br />levels measured at different stages in the process. The following information was wed to make <br />calculations for this year: <br />-Estimated equilibrium moisture of 4.5% <br />