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Bowie Resources Limited Surface Water <br />Bowie No. 1 Mine <br />2003 Annual Hydrology Report P8500 <br /> Stephen's Gulch -Pond 85 <br />• Depth - 4' <br /> Elevation -7580 <br />Summary Information <br />Initiated 2/22/1983 2122/1983 2/22/1983 2/22/1983 <br />Activated 1211/1992 12/111992 12/1/1992 12/1/1992 <br />Date 12/18/2003 9120/2003 6/292003 4/2512003 <br />Fie`Id~ <br />P,araniet@.. Baseline Operation <br />UNITS Min Ave Max Min Ave Max <br />Flow GPM 0.0 19.4 366.6 0.0 40.0 300 1.9 0 120 5 <br />Freeboard Feet 0.0 0.0 0 0.0 0.1 2.6 0 0.31 0 0 <br />Temperature Celsius 1.0 15.8 27.7 0.9 11.9 20.4 1.1 17.5 8.3 <br />Condudivi umhoslcm 156 393 680 70 373 670 70 85 160 <br />pH su 0.0 8.4 10.9 72 8.2 9.7 7.9 8.8 8 <br />Field Comments <br />Lx"~ <br />aroma a <br />UNITS <br />Bicarbonate mg/L 5.0 177.2 336 39.0 123.1 323 53 39 <br />Carbonate mg/L <MDL 89.1 550 <MDL 0.8 6 <MDL 6 <br />Chloride mg/L 1.0 42.8 258 1.0 6.9 31 1 <MDL <br />Conductivity umhos/cm 8 395 610 94 251 556 106 94 <br />Hardness m /L 61.0 173.1 258 33.0 98.0 220 48 33 <br />pH su 7.5 8.4 12 7.4 7.9 8.3 7.4 g,3 <br />ResidueFilterable-TDS mg/L 114.0 256.3 410 70.0 152.0 320 90 70 <br />ResidueNonFilterable-TS mg/L 4.0 31.7 128 6.0 20.1 53 36 8 <br />SAR 0.4 1.0 1.85 0.2 0.6 1.14 0.27 0.22 <br />Sulfate mg/L 8.0 30.2 66 <MDL 17.2 30 <MDL cMDL <br />Calcium (Dissolved) m (L 16.0 42.2 67 8.2 24.5 49.6 t2 8.2 <br />Ma nesium (Dissolved) mglL 5.0 16.1 24 3.0 8.9 24.2 4.3 3 <br />Sodium (Dissolved) mg/L 8.0 29.8 52 2.9 14.6 38.3 4.3 2.9 <br />Potassium m /L <MDL 0.7 2.1 2.1 <br />TDS Ratio ( rav./talc.) 0.9 1.2 1.61 1.61 <br />This large pond is approximately 300' x 400' and is found near the Steven's Gulch Road. (Hanna, 99) <br />I • <br />Baseline Information for Point P8500 is derived from events beginning an 2/27183 through 12/1/92. <br />Point innuenced by mining on 12/1/52, Figure No. 83 <br />