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Bowie Resources, LLC Surface Water <br />Bowie No. 1 Mine <br />2015 Annual Hydrology Report P8800 <br />East Roatcap Creek - Pond 88 <br />Depth - 5' <br />Elevation -7790 <br />Initiated 6/14/1983 6/14/1983 6/14/1983 6/14/1983 <br />Activated 10/1/1997 10/1/1997 10/1/1997 10/1/1997 <br />Date 11/10/2015 9/11/2015 6/17/2015 3/30/2015 <br />Summary Information <br />Field <br />Parameters <br />UNITS <br />Baseline <br />Min Ave <br />Max <br />Operation <br />Min Ave <br />Max <br />Flow <br />GPM <br />0.0 <br />1.2 <br />30 <br />0.0 <br />0.0 <br />0.75j 0 0 0 0 <br />Freeboard <br />Feet <br />3.3 <br />4.6 <br />5 <br />1.0 <br />4.7 <br />6.89 6.28 6.33 5.27 0.97 <br />Temperature <br />Celsius <br />2.0 <br />17.2 <br />28.9 <br />0.8 <br />18.7 <br />29.8 <br />Conductivity <br />umhos/cm <br />80.0 <br />307.1 <br />449 <br />90.0 <br />258.8 <br />380 <br />pH <br />su <br />4.9 <br />8.5 <br />10.3 <br />7.6 <br />8.1 <br />8.8 <br />Field Comments <br />Empty <br />Lab <br />Parameters <br />UNITS <br />Bicarbonate <br />mg/L <br />61.0 <br />146.1 <br />320 <br />133.0 <br />133.0 <br />133 <br />Carbonate <br />mg/L <br /><MDL <br />7.9 <br />108 <br /><MDL <br /><MDL <br /><MDL <br />Chloride <br />mg/L <br /><MDL <br />5.6 <br />12 <br />1.0 <br />1.0 <br />1 <br />Conductivity <br />umhos/cm <br />106.0 <br />263.0 <br />404 <br />267.0 <br />267.0 <br />267 <br />Hardness <br />mg/L <br />37.0 <br />108.4 <br />197 <br />128.0 <br />128.0 <br />128 <br />pH <br />su <br />6.9 <br />7.7 <br />9.3 <br />7.7 <br />7.7 <br />7.7 <br />ResidueFilterable-TDS <br />mg/L <br />40.0 <br />177.2 <br />318 <br />150.0 <br />150.0 <br />150 <br />ResidueNonFilterable-TSS mg/L <br />2.0 <br />40.2 <br />212 <br />8.0 <br />8.0 <br />8 <br />SAR <br />0.2 <br />0.6 <br />1.01 <br />0.4 <br />0.4 <br />0.37 <br />Sulfate <br />mg/L <br /><MDL <br />12.5 <br />25 <br />20.0 <br />20.0 <br />20 <br />Calcium (Dissolved) <br />mg/L <br />10.0 <br />26.71 <br />49 <br />36.71 <br />36.7 <br />36.7 <br />Magnesium (Dissolved) <br />mg/L <br />3.0 <br />9.2 <br />15 <br />8.8 <br />8.8 <br />8.8 <br />Sodium (Dissolved) <br />mg/L <br />3.0 <br />13.6 <br />22 <br />9.7 <br />9.7 <br />9.7 <br />Potassium <br />mg/L <br /><MDL <br />2.1 <br />6.2 <br />TDS Ratio (gray./calc.) <br />0.9 <br />1.0 <br />1.04 <br />This large pond is approximately 75'x 75'. (Hanna, 99) <br />Baseline Information for Point P8800 is derived from events beginning on 6/14/83 through 10/1/97. <br />Point influenced by mining on 10/1/97. <br />Figure No. 60 <br />