REP41255

• Permit No: C1996083
• IBM Index Class Name: REPORT
• Doc Date: 4/18/2007
• Doc Name: 2006 AHR Part 2
• From: J.E. Stover & Associates Inc
• To: DRMS
• Annual Report Year: 2006
• Permit Index Doc Type: Hydrology Report
• Media Type: D
• Archive: No

Bowie Resources, LLC Surface Water
Bowie No. 2 Mine
2008 Annual Hydrology Report HUB-low
Hubbard Creek -Drainage System
Elevation - 5880
Initiated 9/30/1998 9/30!1996 9/30/1996 9/30/1996
Activated 6/23/1999 6/23/1999 6/23/1999 6/23/1999
Date 11/26/2006 9/14/2008 8/14/2006 3/29/2006
Summary Information
Baseline Operation
UNITS Min Ave Max Min Ave Max
Flow CFS 2 90 19.67 85.51 0.06 15.24 151.41 4.7 0.59 2.1 18
FieldComment
h su 8.0 8.5 9.3 7.1 8.3 9.0 8.3 6.5 8.5 8.3
Conductivity umhos/cm 80 198 390 70 301 850 210 290 280 110
Temperature Celsius 2.3 11.1 20.2 0.3 10.2 19.7 4.3 16.3 14.6 8.7
DO mg/L 6.4 8.2 10.0 0.0 7.0 11.7 10.2 8.8 8.6 9
UNITS
Bicarbonate m /L 62 115 155 46 188 690 107.95 148.4
Chloride m /L <MDL 2 3 <MDL 3 7 <MDL <MDL
Contluctivity umhos/cm 118 254 406 108 348 609 218 245
Hardness mg/L 49 96 138 44 139 251 86.96 99.88
Nitrete-Nitrite mg/L <MDL 0.05 0.29 <MDL 0.26 1.62 <MDL <MDL
Oil and Grease m /L <MDL 3.0 3.0 <MDL 3.0 3.0 <MDL 0.6
H su 7.5 7.9 8.3 7.8 8.0 8.4 7.9 8.0
Phosphate mg/L <MDL 0.004 0.030 <MDL 0.02 0.06 <MDL <MDL
ResidueFilte2blrTDS mg/L 100 163 260 80 226 380 289 162
ResidueNOnFilterable-TSS mg/L <MDL 33 170 <MDL 9 21 21 <MDL
SAR <MDL 0.47 1.04 <MDL 0.83 1.18 0.53 1.10
Sulfate m /L <MDL 17 50 <MDL 48 100 13.58 27.17
Aluminum mglL 005 0.58 1.91 <MDL 0.19 1.13 0.32 <MDL
Arsenic mg/L <MDL 0.0004 0.0010 <MDL 0.0027 0.0180 0.008 0.016
Cadmium mg/L <MDL <MDL <MDL <MDL <MDL <MDL <MDL <MDL
Calcium mg/L 13.8 26.2 36.7 12.5 37.3 70.7 23.0 26.8
Co er m /L <MDL 0.001 0.010 <MDL 0.001 0.004 <MDL 0.004
Iron (Total) mg/L 0.09 0.54 1.44 0.08 0.25 1.13 0.28 0.06
Lead mglL <MDL <MDL <MDL <MDL 0.0023 0.0200 <MOL 0.02
Magnesium mg/L 3.6 7.4 11.2 3.1 11.5 21.8 7.2 8.2
Manganese (Totap mg/L 0.009 0.016 0.034 0.005 0.016 0.041 0.024 0.01
Mercu m /L <MDL <MDL <MDL <MDL 0.0001 0.0002 0.00018 0.00016
Mol ebdenum m !L <MDL <MDL <MDL <MDL 0.01 0.03 <MDL 0.03
Selenium mg/L <MDL 0.001 0.010 <MDL 0.0038 0.0200 0.005 0.02
Sodium mg/L 5.3 15.9 27.6 4.3 24.9 48.5 11.4 25.2
Zinc mg/L <MDL 0.01 0.04 <MDL <MDL <MDL <MDL <MDL
The Lower Hubbard Creek monitoring point is located at a concrete box culvert under the Union Pacihc railroad trackjust above the North
Fork o/the Gunnison. Fbw values are taken /rom the USGS information /or station #09132960.
li
Baseline Information for Point HuD-low is tledved from events beginning on 9/30/96 through 6/23/99.
Point influenced by mining on 6/23/99.
Figure No. 116