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u <br />lower discharge fro ~G - 5 does not take into account the variable <br />water level in the o ine. There is an estimated eight million <br />gallon storage capacity in the old mine between the drain pipe and <br />the free discharge point. There was an estimated five million <br />gallons more water in the mine at the end of the 1984 reporting <br />period than at the first. This volume represents another 9.5 <br />gpm inflow for the year. Of the mine inflows other than the old <br />mine water, approximately half of the water is accounted for in <br />flow measurements. UG - 6 is not measured but may contribute one <br />gpm. The remaining flows are small or are flowing in the floor. <br />The quality as indicated by conductivity improved in all but one <br />sample point. UG - 5 is monitored where it drains from the old mine <br />and where it flows into the main sump. The lower conductivity at <br />the lower UG - 5 smaple point may be a result of additional inflows <br />or may be a result of settling from the oxidation-reduction process <br />of going from a pH of 6.8 to 8.3 <br />• Consumptive Use <br />The consumptive water use, table C - 84, shows the monthly <br />billed water usage from the Colby Domestic Water Company. An <br />estimated 730,000 gallons of this water was a result of a water <br />line leak. The leak near the loader garage showed up immediately <br />underground but was not attributed to a water line break until the <br />first meter reading in the spring. The estimated gallons/ton is <br />higher than is needed for an active mine but is to be expected in <br />this mines idle state. <br /> <br />• <br />