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• Blue Ribbon Mine - AHR Page 3 <br /> North Underdrain Middle Underdrain South Underdrain <br />Year Flow Cond Flow Cond Flow Cond <br />1991 0.018 3030 0.000 0 0.020 4910 <br />1992 0.072 2920 0.000 0 0.034 3960 <br />1993 0.659 2620 0.048 1300 0.761 4450 <br />1994 0.010 2430 0.000 0 0.042 5080 <br />1995 0.088 2640 0.000 0 0.137 4710 <br />1996 0.030 2190 0.0002 1310 0.066 5010 <br />1997 0.112 2420 0.000 0 0.259 5270 <br />1998 0.088 1334 0.084 1060 0.329 3226 <br />1999 0.018 2364 0.000 0 0.062 5362 <br />• The pH and temperature data for the underdrains are presented in the enclosed data <br />pages in the GD-XX page series. <br />NPDES MONITORING <br />There was no discharge from the sediment ponds during the year therefore no NPDES <br />sampling was conducted. <br />MINE WATER <br />The mine was sealed in 1986. No mine water inflow information has been collected <br />from the mine since it was sealed. <br />CONSUMPTIVE USE OF WATER <br />There was no consumptive use of water during the year. <br />• <br />