REP19655

• Permit No: C1996083
• IBM Index Class Name: Report
• Doc Date: 5/8/2006
• Doc Name: 2005 Annual Hydrology Report Part 2
• From: J.E. Stover & Associates Inc
• To: DMG
• Annual Report Year: 2005
• Permit Index Doc Type: Hydrology Report
• Media Type: D
• Archive: No

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Bowie Resouroes, LLC
Bowie No. 2 Mine
2006 Annual Hydrology Repoli
NFG-low
North Fork -Drainage System
Elevation -!1680
SurTaee Water
Initiated 9/3x7996 9/30/1996 9(3x1998 9/30/1996 9/3x1996
Activated 3/31/1997 3/31/1997 3!31/1997 3f3V1997 3131/1997
Date 72/21/2005 9/262005 8/172005 6/28/2005 3/19/2005
Summary Information

e'
-'"s ~y=~ Baseline Operation
UNITS Min Ave Max Min Ave Max
Flow CFS 99 292 870 53 476 2390 N/A 202 249 1350 298
FieltlComment Ice
ph su 8.1 8.4 8.7 7.6 8.3 8.8 8.5 8.5 8.3 8.1 B.0
Conductivity umhoslan 160 180 200 50 176 290 180 190 150 50 170
Tem erawre Celsius 4.0 8.5 14.8 0.3 11.6 22.3 0.3 12.9 15.8 10.8 8.9
DO mg/L 0.0 7.8 11.5 11 6 8.5 8.9 9.7
l~Ib~f ~~< ~'j
t UNITS
Bicarbonate mg/L 95 100 105 40 87 123 87 40
Chloride mg/L 2 3 3 <MDL 2 5 4 3 <MDL
Chromium III Crlll mg/L <MDL <MDL <MDL <MDL
Chromium VI CrIV mg/L <MDL <MDL <MDL <MDL
Cyanide, Total mg/L <MDL <MDL <MDL <MDL
Conductivity umfws/an 201 222 242 93 192 283 215 93
Hardness mg/L 84 85 85 <MDL 79 137 79 85 40
NiGale mgt <MDL 0.08 0.16 <MDL 0.7t 0.4B 0.13 0.05 <MDL
NiMte mg/L <MDL <MDL <MDL <MDL 0.001 0.010 <MDL <MDL <MDL
Ammonia m9/L <MDL <MDL <MDL <MDL <MDL <MDL <MDL
OilBGrease mg/L <MDL cMOL <MDL <MDL 3 3 <MDL <MDL
pH su 8.0 8.0 8.0 7.0 7.9 8.8 8.3 8.4 8.1
Phosphate mg/L <MDL <MDL <MDL <MDL 0.01 0.05 <MDL <MDL
ResidueFillerable-TDS mg/L 130 140 150 50 126 200 140 90 50
ResidueNOnFillerable-TSS m L <MDL 3 6 <MDL 11 52 12 14
SAR 0.55 0.67 0.66 <MDL 0.53 1.65 0.7 0.23
Sulfate mg/L 10 15 20 <MDL 19 30 10 10 <MDL
Sulide5 mg/L <MDL 0.04 0.04 <MDL
Aluminum mg/L 0.10 0.15 0.27 0.05 0.38 1.32 0.19 1.32
Arsenic mg/L <MDL 0001 0.1701 <MDL 0.0003 0.0010 <MDL <MDL 0.0005
Boron mg/L 0.02 0.03 0.04 0.02
Cadmium mg/L <MDL <MDL <MDL <MDL 0.0005 0.0050 <MDL <MDL 0.005
Caldum ngn 24.6 24.8 25.0 9.7 23.5 38.0 23.2 24.8 12.7
Copper ng/L <MDL <MDL <MDL <MDL <MDL <MDL <MDL <MDL <MDL
Iron (Dissolvetl) mg/L <MDL <MDL <MDL <MDL O.Ot 0.08 0.04
Iron (Total) mg/L 0.14 0.21 0.27 0.07 0.36 1.48 0.2 0.67 1.18
Lead mg/L <MDL 0.010 0.020 <MDL 0.0026 0.0500 0.0002 0.0005 0.0004
Magnesium mg/L 5 5.5 5.7 2.0 5.3 10.1 5.2 5.8 2.3
Man anew (Dissolved) mg/L <MDL <MDL <MDL <MDL 0.268 2.900 <MDL
Manganese (TOtap mg/L 0.021 0.090 0.160 0.007 0.021 0.042 0.019 0.028 0.027
Mercury mg/L <MDL <MDL <MDL <MDL 0.17000 0.0002 <MDL <MDL 0.0002
Molyebdenum mgll <MDL <MDL cMDL <MDL <MDL <MDL <MDL <MDL
Nickel mg/L <MDL <MDL <MDL <MDL
Selenium mg/L <MDL <MDL <MDL <MDL <MDL <MDL <MDL <MDL <MDL
Silver mg/L <MDL <MDL <MDL <MDL
Sodium mg/L 71.5 12.2 12.9 3.0 13.5 33.8 14.2 3.3
Zinc mg/L 0.02 0.02 0.03 <MDL 0.01 0.04 <MDL <MDL <MDL
Fieltl parameters, except flow, Iorthe Lower North Fork of the Gunnison River ere taken on the river approximately 1500' below the confluence of
Terror Creek end the North Fork o/ the Gunnison Flaw data for the North Fork of the Gunnison over is obteinetl Irom USGS station #09132500.
Baseline Information for Point NFG-law is deeived from events beginning on 9/30196 through 3I31RZ Point inguenced by mining on 3131197.
Figure No. 119