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
2006 Annual Hydrology Report D3415
~ Dove Gulch -Drainage System
Elevation - 7160
Initiated 6!6/1998 6/6/1998 6/8/1998 6/8/1998
Activated
Date 11/2/2006 8/15/2006 6/29/2006 5/28/2006
Summary Information
Baseline Operation
UNITS Min Ave Max Min Ave Max
Flow GPM 0.00 17.00 224.00 4 7.1 4.6 10.7
FieldComment
h su 7.3 7.7 8.2 8.0 7.4 7.4 7.4
Conductivity umhos/cm 280 534 680 880 880 630 600
Temperature Celsius 7.1 11.4 17.1 7.1 11.8 13.9 9.0
UNITS
Bicarbonate m /L 232.0 292.8 338.6 314.88 314.88 285.38 287.53
Chloride mg/L <MDL 8 11 <MDL <MDL <MDL <MDL
Contludivity umhos/cm 316.9 607.3 751.0 572.84 577.9 318.85 611.1
Hardness mg1L 105.9 160.1 212.0 150.71 116 198.8 105.85
Nitrate-Nitrite mg/L <MDL 1.35 5.49 0.37 2.97 0.38 <MDL
Oil and Grease m IL <MDL 3.73 9.04 <MDL 9.04 5.3 2.71
H su 8.8 7.7 8.2 8.0 7.28 7.86 6.82
Phosphate mg/L <MDL <MDL <MDL <MDL <MDL <MDL <MDL
ResidueFilterable-TDS mg/L 277 397 522 338 338 522 277
ResidueNonFilterable-TSS mg/L <MDL 12 46 20 <MDL 46 <MDL
SAR <MDL 2.56 4.15 3.32 0.885 3.28 3.92
SuHate m /L 12.6 56.1 120.0 34.99 34.16 49.39 50.63
Aluminum mg/L <MDL 0.34 1.17 0.42 0.22 <MDL 0.1
Arsenic mg/L <MDL 0.0108 0.0380 0.031 0.038 <MDL 0.025
Cadmium mg/L <MDL 0.0104 0.0800 0.08 0.0008 0.01 0.0008
Calcium m /L 17.9 45.2 62.3 43.8 45.3 43.5 33.6
Co er m /L <MDL 0.01 0.04 <MDL <MDL <MDL 0.02
Iron (fatal) mg/L <MDL 0.28 1.18 0.11 0.01 0.34 0.03
Lead mg/L <MDL 0.0110 0.0300 0.03 0.02 0.03 <MDL
Magnesium mg/L 0.7 11.6 21.9 10.16 0.701 21.9 5.21
Man anese otal) m /L <MDL 0.01 0.04 <MDL 0.013 0.01 <MDL
Merw m /L <MDL 0.0001 0.0003 0.00024 0.000036 0.00016 0.0003
Molyebdenum mglL <MDL 0.01 0.02 <MDL 0.02 <MDL <MDL
Selenium mg/L <MDL 0.013 0.034 0.0248 0.034 0.0328 0.021
Sodium mg/L 21.4 83.9 105.9 93.7 21.4 105.9 92.9
Zinc mg/L <MDL 0.007 0.020 <MDL 0.01 0.008 <MDL
The area of croncem for monitoring paint D34-15 has not been aNected by the mining operation. There/ore, all recoMed
monitoring events are considered Baseline.
The bcah'on o/D34-15 is in Dove Gulch, below the 9 perennial springs located along me southern canyon wall. If can
be locafedjusf below fhe remnanfs of an old sprang house.
Baseline Information Collection initiated on 6/&98 and not yet considered wmplete.
Point D34-15 has not been influenced by mining.
Figure No. 103