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<br />\J <br />• <br />Table 5 Quality of Mine Water nt the Mt. Gunnison No. L Mine During the 1990 Water Year <br /> <br />Location <br />Date pH <br />(units) Conductivity <br />(µmhos/cm) TSS <br />(mg/L) TDS <br />(mg/L) Total Fe <br />(mg/L) <br />MB-1 Discharge 3 Jul 90 8.5 1160 7.62 829 0.140 <br />MB-1 Discharge 16 Jul 90 8.35 1120 13.95 774 0.000 <br />MB-1 Discharge 23 Jul 90 8.6 1000 2.0 696 0.000 <br />MB-1 Discharge 21 Aug 90 8.6 920 6.4 766 0.287 <br />MB-I Discharge 12 Sep 90 8.15 700 5.79 529 0.20 <br />MB-2 Discharge 12 Apr 90 7.4 1300 9.6 1190 0.100 <br />Table 6 Mine Water Balance fur the Gunnison No. L Mine <br />Parameter Volume (Acre-feet) <br />Water pumped to FW-1 from the North Fork 74.42 <br />Potable water processed 8.95 <br />Water pumped underground 52.2 <br />Water discharged from underground 34.73 <br />Water leaving the mine on coal as added moisture 12.11 <br />Water leaving the mine on gob as added moisture 2.18 <br />Water transferred from MB-1 and MB-2 to FW-1 (estimate) 0 <br />Water leaving the mine in ventilating air and seepage 9.23 <br />Estimated sustained Oow 9.3 <br />Total mine water inflow (estimate) 61.50 <br />Total mine water outflow (estimate) 58.25 <br />7 <br />