REP14584

• Permit No: C1980007
• IBM Index Class Name: Report
• Doc Date: 4/25/2003
• Doc Name: 2002 AHR Appendix A Thru D
• From: Mountain Coal Company
• To: DMG
• Annual Report Year: 2002
• Permit Index Doc Type: Hydrology Report
• Media Type: D
• Archive: No

Lower Minnesota Creek (USGS)
Surface Water Quality and Field Parameters

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Mountain Coal West EIk Mine
Monitoring Location
Descri lion
Field Parameters L. Minnesota Ck (USGS)
Units
Minimum Baseline
Maximum
Mean 2002 Water Year
4/14/2002 6/17/2002 9/10/2002
Flow cfs NM NM NM
Electrical Conductivi umhos/cm 427 241 348
Fi SU 6.14 7.6 7.48
Tem erature oC 11.6 11.3 17.9
Comment
Laborato Parameters
Name of Certified Lab nCZ
Lab Reference # L37306-09
Sam le Date x/17/2002
Lab Test Date 6/20-7/11
Sam led B GV
Alkalini Total CaCO3 m /I
Aluminum, dissolved m /I
Anions me /I
Arsenic, dissolved m /I
Arsenic, total m /I
Bicarbonate m /I 46 75 60
Boron, dissolved m /I
Cadmium, dissolved m /I
Calcium, dissolved m 11 19.6 19.6 19.6
Carbonate m /I
Cation -Anion Balance m /I
Cations me /I
Chloride m /I 2 1
Conductivi umhos/cm 152 803 350 188
Co er, dissolved m /I
Hardness m /I 65 106 82
H droxlde m 11
Iron, dissolved m /I 0.23 0.58 0.41 0.09
Iron, total m /I 0.45 82 8.9 1.42
Lead, dissolved m /I
Ma nesium, dissolved m /I 6.1 87 7A
Man anese, dissolved m /I 0.013 0.015 0.014
Man anese, total m /I 0.018 1.83 0.188
Mercu ,total m /I
Mol bdenum, dissolved m /l
Nitrate as N ,dissolved m /I
Nitrate/Nitrite as N m /I
Nitrite as N ,dissolved m /I
H SU 7.7
Phos hate m /1
Phos horns Ortho ,dissolved m /I
Potassium, dissolved m /I
Selenium, total m /1
Sodium Absor tion Ratio SAR talc. 0.3 0.5 0.4
Sodium, dissolved m /I Z7 7.7 z7
Sulfate m /I 20 50 40
TDS Ratio talc.
TDS Calc. m /I
TDS m /I 100 584 231 120
TSS m /I 16 1300 292 72
Zinc, dissolved m 11

ACZ Labs, Steamboat S rin s, Colorado
` Standard is for reference ur oses onl
NA - not a livable NM -not measured NR -not re orted

West Elk Mine
C•6 2002 Annual Hydrology Report HydroGeo, Inc.