2011-04-18_REPORT - C1996083 (5)

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Bowie Resources, LLC Surface Water Bowie No. 2 Mine 2010 Annual Hydrology Report NFG-up North Fork - Drainage System Elevation - 6880 Initiated 9/30/1996 9/30/1996 9/3011996 9/30/1996 9/30/1996 Activated 3/31/1997 3/31/1997 3/31/1997 3/31/1997 3/31/1997 Date 11130/2010 9!72010 8/24/2010 6/15/2010 3/23/2010 Summary Information 0 • Baseline Operation UNITS Min Ave Max Min Ave Max Flow CFS 99 292 610 53 468 2720 257 242 1040 86 FieldComment ICE ph su 8.1 8.5 8.8 7.5 8.3 8.9 8.6 8.9 8.6 8.2 8.0 Conductivity umhos/cm 160 167 180 50 165 320 320 230 180 70 190 Temperature Celsius 3.6 7.3 13.7 0.2 10.8 22.2 0.3 19.2 19.6 14.9 2.8 DO mg/L 7.2 9.1 11.7 11.5 7.8 8.4 8 11 UNITS Bicarbonate mg/L 88 93 98 35 80 135 118.05 4133 Chloride mg/L 2.0 2.5 3.0 <MDL 3.1 10.9 1.7 6,81 2.36 Chromium III Crlll mg/L <MDL <MDL <MDL <MDL Chromium VI CrIV mg/L <MDL 0.008 0.008 <MDL Cyanide, Total mg/L <MDL 0.067 0.081 <MDL Conductivity umhos/cm 185 205 225 7 184 403 403 231 117 Hardness mg/L 74 77 79 28 71 132 103.54 76.54 27.76 Acidity mg/L <MDL 4 4 4 <MDL 4 Nitrate mg/L <MDL 0.05 0.09 <MDL 0.43 3.47 0.33 Nitrate/Nitrite mg/L 0.00 0.05 0.09 <MDL 0.4 3 <MDL <MDL Nitrite mg/L <MDL <MDL <MDL <MDL 0.004 0.017 <MDL Ammonia mg/L <MDL <MDL <MDL <MDL 0.03 0.23 <MDL Oil & Grease mg/L <MDL <MDL <MDL <MDL 7 11 <MDL <MDL pH su 7.9 8.0 8.0 7.2 7.9 9.0 7.94 8.4 8.13 7.63 Phosphate mg/L <MDL <MDL <MDL <MDL 0.02 0.08 <MDL 0.081 ResidueFilterable-TDS mg/L 120 130 140 9 131 305 305 160 120 110 ResidueNonFilterable-TSS mg/L 10 11 12 <MDL 24 131 70 32 7 SAR 0.42 0.60 0.78 <MDL 0.64 2.17 0.848 0.42 Sulfate mg/L 10 15 20 <MDL 16 30 28.4 4.116 22.23 Sulfide S mg/L <MDL 0.05 0.05 <MDL Aluminum mg/L 0.08 0.18 0.27 <MDL 0.51 2.78 0.016 1.52 Arsenic mg/L <MDL <MDL <MDL <MDL 0.0022 0.0120 0.008 0.007 0.00181 Boron mg/L 0.02 0.42 1.20 0.62 Cadmium mg/L <MDL <MDL <MDL <MDL 0.004 0.020 0.01 0.004 0.002 Calcium mg/L 21.9 22.9 24.0 7.2 20.7 34.2 30.2 7.16 Copper mg/L <MDL <MDL <MDL <MDL 0.012 0.197 0.01 <MDL 0.002 Iron, Dissolved mg/L <MDL 0.04 0.09 0.01 <MDL 0.01 0.05 Iron (Total) mg/L 0.09 0.09 0.09 0.03 0.32 2.90 0.1 0.11 0.13 0.55 Lead mg/L <MDL <MDL <MDL <MDL 0.0114 0.1200 0.01 <MDL 0.01 Magnesium mg/L 4.70 4.70 4.70 1.88 4.67 12.78 6.83 2.4 Manganese (Dissolved) mg/L <MDL <MDL <MDL <MDL 0.32 2.90 0.02 0.007 Manganese (Total) mg/L 0.011 0.015 0.019 <MDL 0.026 0.115 0.052 0.025 0.03 Mercury mg/L <MDL <MDL <MDL <MDL 0.00007 0.00022 0.00007 0.00019 0.00016 Molyebdenum mg/L <MDL <MDL <MDL <MDL 0.005 0.030 0.008 0.01 Nickel mg/L <MDL 0.01 0.01 <MDL Selenium mg/L <MDL <MDL <MDL <MDL 0.003 0.027 0.016 0.027 0.00009 Silver mg/L <MDL <MDL <MDL <MDL Sodium mg/L 8.6 12.0 15.3 3.3 14.5 41.2 20.1 5.2 Zinc mg/L 0.020 0.025 0.030 <MDL 0.011 0.040 0.002 <MDL 0.003 Field parameters, except flow in the Upper North Fork of the Gunnison River monitoring point are taken on the river just above its confluence with Hubbard Creek. Flow data for the North Fork of the Gunnison river is obtained from USGS station #09132500. Baseline Information for Point NFG-up is derived from events beginning on 9/30/96 through 3/31197. Point influenced by mining on 3/31/97. Figure No. 120