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Bowie Resources, LLC <br />Bowie No. 1 Mine <br />40 2009 Annual Hydrology Report <br />P850O <br />Stephen's Gulch - Pond 85 <br />Depth - 4' <br />Elevation -7580 <br />Surface Water <br />Initiated 2/22/1983 2/22/1983 2/22/1983 2/22/1983 <br />Activated 12/1/1992 12/1/1992 12/1/1992 12/1/1992 <br />Date 11/28/2009 8/22/2009 6/18/2009 5/13/2009 <br />Field <br />Parameters UNITS <br />Summary Information <br />Baseline Operation <br />Min Ave Max Min Ave Max <br />Flow GPM 19.4 0.0 69.1 480 75 75 450 60 <br />Freeboard Feet 0.0 0.0 0.1 2.6 0 0 0 0 <br />Temperature Celsius V 15.8 0.9 10.3 20.4 3.7 7 10.9 10.7 <br />Conductivity umhos/c 393 ] 40 278 670 70 100 110 150 <br />pH su 5.7 8.5 10.9 7.2 8.0 9.7 8.3 7.7 8.2 7.8 <br />Field Comments <br /> Lab <br />Parameters <br />UNITS <br /> Bicarbonate mg/L 5 177 336 18 93 323 63.; <br /> Carbonate <MDL 89.1 550 <MDL 0.7 6 <ME <br /> Chloride 1.0 42.8 258 <MDL 7 33.78 2. <br /> Conductivity jumhos/cm 8 395 610 79 200 556 195 <br /> Hardness 61.0 173.1 258 23 89 271 54.: <br /> pH 7.5 8.4 12 6.9 7.8 8.5 6.£ <br /> ResidueFilterable-TDS 114.0 256.3 410 60 122 320 '. <br /> ResidueNonFilterable-TSS mg/L 4.0 31.7 128 <MDL 16.3 53 0 <br />. SAR 0.4 1.0 1.85 0.22 1.44 14.8 0.! <br /> Sulfate mg/L 8.0 30.2 66 <MDL 20 93.02 1.£ <br /> Calcium (Dissolved) mg/L 16.0 42.2 67 4.9 20.7 49.6 12 <br /> Magnesium (Dissolved) mg/L 5.0 16.1 24 2.6 9.2 39.7 5 <br /> Sodium (Dissolved) mg/L 8.0 29.8 52 2.9 45.7 554 10 <br /> TDS Ratio (arav./calc.) 0.12 0.94 1.61 U <br />This large pond is approximately 300'x 400' and is found near the Steven's Gulch Road. (Hanna, 99) <br />• <br />Baseline Information for Point P8500 is derived from events beginning on 2/22/83 through 12/1/92. <br />Point influenced by mining on 12/1/92. <br />Figure No. 33