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Bowie Resources, LLC Surface Water <br />Bowie No. 1 Mine <br />2015 Annual Hydrology Report P1307 <br />Steven's Gulch - Pond 13-7 <br />Depth - 5' <br />Elevation -8875 <br />Initiated 7/6/1983 7/6/1983 7/6/1983 7/6/1983 <br />Activated 4/1/1992 4/1/1992 4/1/1992 4/1/1992 <br />Date 1 11/10/2015 9/11/2015 6/19/2015 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 />0.1 <br />2.78 <br />0.0 <br />0.0 <br />0.15 0 0 0 0 <br />Freeboard <br />Feet <br />0.0 <br />0.0 <br />0 <br />0.0 <br />3.7 <br />6.72 6.19 6.24 4.62 1.76 <br />Temperature <br />Celsius <br />2.5 <br />15.6 <br />28.1 <br />0.1 <br />13.9 <br />25.7 <br />Conductivity <br />umhos/cm <br />155 <br />292 <br />480 <br />100 <br />229 <br />520 <br />pH <br />su <br />6.6 <br />22.6 <br />256 <br />7.2 <br />8.2 <br />9.7 <br />Field Comments <br />No Inflowl No Inflowl No Inflowl Seep Inflow <br />Lab <br />Parameters <br />UNITS <br />Bicarbonate <br />mg/L <br />32 <br />148 <br />187 <br />71 <br />98 <br />132 <br />Carbonate <br />mg/L <br /><MDL <br />3 <br />25 <br /><MDL <br /><MDL <br /><MDL <br />Chloride <br />mg/L <br />1 <br />6 <br />12 <br />3 <br />3 <br />3 <br />Conductivity <br />umhos/cm <br />256 <br />296 <br />404 <br />144 <br />187 <br />232 <br />Hardness <br />mg/L <br />107 <br />135 <br />153 <br />66 <br />81 <br />89 <br />pH <br />su <br />6.8 <br />7.61 <br />8.3 <br />7.01 <br />8.0 <br />9.9 <br />ResidueFilterable-TDS <br />mg/L <br />160 <br />185 <br />226 <br />90 <br />129 <br />186 <br />ResidueNonFilterable-TSS mg/L <br />8 <br />44 <br />176 <br />8 <br />9 <br />12 <br />SAR <br />0.08 <br />0.23 <br />0.38 <br />0.10 <br />0.12 <br />0.14 <br />Sulfate <br />mg/L <br />2 <br />21 <br />101 <br />10 <br />15 <br />20 <br />Calcium (Dissolved) <br />mg/L <br />23.0 <br />31.1 <br />36 <br />17.9 <br />23.6 <br />30.6 <br />Magnesium (Dissolved) <br />mg/L <br />6.01 <br />12.41 <br />16 <br />5.1 <br />7.0 <br />9.1 <br />Sodium (Dissolved) <br />mg/L <br />1 2.01 <br />5.91 <br />10 <br />2.0 <br />2.7 <br />3.2 <br />Potassium <br />mg/L <br /><MDL <br />4 <br />7 <br />TDS Ratio (gray./calc.) <br />1.15 <br />1.19 <br />1.24 <br />Pond 13-7 is a man made stock pond (approximately 80'x 20'x 2). The source of the surface water that feeds this pond <br />is runoff. (Gordon, 83) <br />Baseline Information for Point P1307 is derived from events beginning on 7/6/83 through 4/1/92. <br />Point influenced by mining on 4/1/92. <br />Figure No. 53 <br />