REP45377

• Permit No: C1981019
• IBM Index Class Name: Report
• Doc Date: 3/16/2005
• Doc Name: 2004 AHR Section 2
• From: Colowyo Coal Company L.P.
• To: DMG
• Annual Report Year: 2004
• Permit Index Doc Type: Hydrology Report
• Media Type: D
• Archive: No

Colowyo Coal Company, L.P
Water Qualtty Data
1992-2004
Lower Good Spring Creek
COLOWVO MINE
LGSC (LGSC)
Listing o(Stream Lab Data
Flow Field Field Field Lab Lab TDS N03 N02 N03+N02 NH3 Total Bicarb Ambig. SW Ambig. SW Ambig. SW Ambig. 5U Ambig. SN Ambig. SW Ambig. SN Ambig. SW Ambig. SW Ambig. SW
No datum=> Blank Rah pH Tamp Conduct pH Conduct -180 TSS as N as N as N as N P as CaC03 Sulfate As Ca Fe Pb Mg Mn Hg Se Na Zn
cfs S.U. degC umho/cm S.U. umholcm mg/I mg/I mg8 mg/I mg8 mg/1 mg/I mg/I mgll mgll mg/I mg8 mgll mgll mg/I mg/I mg/I mgll mgB
Statlatles
Mean 4.28 8.06 943 ifi51.77 8.00 1697.39 1337.52 66.38 1.42 0.01 2.54 0.12 0.06 3%.69 661.40 0.00 742.77 0.60 0.03 147.61 0.12 0.00 0.01 72.79 0.02
5[d. Dev. 5.50 0.42 fi.05 377.23 0.23 327.53 360.44 268.45 0.82 0.07 2.28 0.24 0.07 77.25 ifi0.58 0.00 25.47 0.63 0.03 28.87 0.% 0.00 0.00 25.93 0.03
Caef. Var.
Range 46.94 4.7 25.6 2760 2.4 2659 3330 3698 3.77 0.04 7.99 2.25 0.495 572 685 0.0174 140 4.24 0.199 749.d 0.315 0.0009 0.029 1443 0.195
Max 47 9.3 25 2900 8.5 2820 d050 3700 4.1 0.05 8.29 2.2fi 0.5 602 945 0.018 208 4.27 0.2 226 0.32 0.001 0.03 764 0.2
Min 0.06 4.6 -0.6 740 6.1 167 720 2 0.33 0.01 0.3 0.01 0.005 30 260 0.0006 68 0.03 0.001 76.6 0.005 0.0001 0.001 197 0.005
Max et 427/79% 11/1a1997 72fi/ 1%2 10/317%fi 8119/ 1%1 1/19/1993 71/&2000 4/30/1985 1228/1989 5/72001 17/2617%5 17/74/7989 12/1999 1x242002 72/4/7989 4!7/1982 12/28/1989 427/1998 5/172001 17/4/7989 4O/1%2 7/1621%14 1aa7%9 1x8179% 70/1/2000
Min at 11/6/1999 7/82002 /Z18/ 1996 4/52002 5/1x 1%1 62311992 523/1995 x30/1996 a102004 71/12004 B117/i%2 &1 x2004 9/11/7997 5/1x1992 5/20/7997 11/12004 3Hx1984 1/7/7988 11/52007 520/7997 7!372(100 6/1H 993 9202001 4/172000 628/1%5
#xSample: 257 201 247 201 282 266 127 279 41 37 92 96 97 707 707 107 140 114 107 741 105 707 107 109 107
Sbtion Sample Flow Field Field Field Lab Lab TDS N03 N02 N03+N02 NH3 Total Bicarb Ambig. SW Ambig. SW Ambig. SW Ambig. SN Ambig. SN Ambig. SW Ambig. SW Ambig. SN Ambig. SW Ambig. S'W
Name Dah Rate pH Temp Conduct pH Conduct -180 TSS as N as N as N as N P as CaC03 Sulfate Ps Ca Fe Pb Mg Mn Hg Se Na Zn
c(s S.U. degC umholcm S.U. umho/em mg/l mg/I mgll mg/l mg8 mgB mgll mg/I mgll mgll mg/I mgll mgfl mgll mg/l mg/1 mgll mgll mgll
LGSC 1021/1994 0.2 B 17 2020 B.2 2010 5
LGSC 71/1811994 7.26 8.3 2 1700 8.1 1750 1390 5 1.8 0.08 0.079 410 730 0.001 130 0.22 0.02 150 0.096 0.0002 0.01 58 0.07
LGSC 72/13H 994 1.3 8.1 2 2770 7.9 2%0 6
LGSC 1/78/19% 1.8 7.9 1 1890 B 1870 5 '
LGSC 228/19% 1.B 8.2 6 1800 8 7820 5
LGSC 3/75/1%5 2.15 8 5 7810 7.9 1820 1400 12 1.05 0.17 0.018 413 740 0.007 135 0.25 0.02 750 0.109 0.0002 0.007 65.9 0.01
LGSC d28/1995 2.27 8.3 a 1860 8.2 1840 8
LGSC 523/1995 iL92 7.9 10 7020 8.1 1040 720 5 1.09 0.05 0.076 284 370 0.001 9fi.5 2.58 0.02 77.5 0.117 0.0002 0.003 28.6 002
LGSC 6/19/7995 8.17 8.3 17 1170 8.2 7190 32
LGSC 726/1995 5.36 10 7530 7.9 7540 76
LGSC B2a19% 3.77 8.1 1630 0 1640 62
LGSC 9/7311995 3.77 B.2 12 1620 8.2 1640 1280 26 0.% 0.07 0.98 0.% 0.036 424 673 0.001 1d1 0.85 002 157 0.174 0.0002 0.006 67 004
LGSC 1025H 995 3.92 B.1 3 7900 B 1890 3B
LGSC 1129/1995 2.39 8.3 3 7820 B.2 1820 56
LGSC 17/5/1995 2.39 8.2 2 7830 8 1710 1310 5 1.27 0.01 1.27 0.07 0.017 426 610 0.007 134 0.26 0.02 145 0.123 0.0002 0.007 65.5 003
LGSC 7/3/799fi 2.15 8.31 3 2550 7.9 1890 B
LGSC 720/7996 3.77 8.33 4 7511 8.1 1370 7080 26 1.5 0.03 1.53 0.12 0.713 270 490 0.001 110 0.82 OOd 112 0.24 0.0002 0.006 55.4 0.03
LGSC 3/78/79% 0.3 B.fi2 4 1549 8.2 1550 7250 12
LGSC x7/19% 1.1 8.79 fi 2150 7.9 1800 7300 222
LGSC 5'6/19% 1.4 8.1 11 1477 8.1 1416 1010 9fi 0.9 0.01 0.9 0.09 0.705 406 430 0.001 120 1.95 0U2 116 0.273 0.0002 0.004 54 0.04
LGSC 613/1%6 7.4 7.98 14 1600 B.3 1567 36
LGSC 7/171%6 1.3 8.15 it 75fi5 S2 1625 1230 24 1.16 0.01 1.17 0.05 426 550 0.007 123 0.74 002 132 0.142 0.01702 0.006 58.2 0.03
LGSC &B/7%6 1.7 8.2 77.8 1%4 B.3 1709 12 0.34
LGSC 926/1996 1.26 8.7 7.6 7471 B 7886 30 O.6d 0.01 0.64 491 690 0.001 135 0.37 0.04 152 0.76 0.0(%Y2 O.OOd 894 0.02
LGSC 1x3119% 1.28 7.5 16 2900 8.1 2036 16 0.51 0.01 0.51 484 660 0.001 723 0.37 0.04 155 0.74 0.0002 0.006 115 0.02
LGSC 71/19/19% 2.39 8.4 4.4 7340 8.3 1623 5 0.6 001 0.67 442 630 0.007 145 0.4 0.04 150 0.0002 0.004 gbh 0.03
LGSC 12/18/19% 1.B 8.1 -O.fi 7843 7.9 1%7 5 1.43 0.01 1.43 503 680 0.001 748 0.2 0.04 151 0.162 00002 0.007 807 0.07
LGSC 1/19/1997 2.39 8.3 0.2 1fi20 8.2 1699 6 7.94 0.01 1.95 440 870 0.007 142 0.15 0.04 14d 0.124 0.0002 6.608 754 0.07
LGSC 226/1%7 B.5 0.7 1328 82 1687 12 i.fi9 0.01 1.7 436 670 0.007 139 0.28 0.04 137 0.099 00002 0.006 66.7 0.02
LGSC 3/19/1%7 2.92 B.4 5.6 1220 8.2 1446 5 7.15 0.07 1.16 0.006 410 560 0.007 124 0.19 0.04 125 0.075 0.0002 0.007 562 002
LGSC 421/1%7 7.72 8.3 5.7 1062 8.2 1170 28 7.13 0.07 1.14 0.025 366 400 0.007 108 0.58 0.04 95.3 0.077 0,0002 0.005 46.9 003
LGSC 52x7997 17 8.3 12 836 B.2 7020 88 7.04 0.01 1.05 317 260 0.002 %.6 2.25 0.04 76.6 . 0.135 0.0002 0.004 31.4 0.02
LGSC 626/1997 6.23 8.1 19.8 1379 B.1 1d40 66 2.09 0.02 2.11 0.173 420 400 0.002 129 1.35 0.04 116 0.15 0.0002 0.008 48.4 0.02
LGSC 75/1997 5.36 8.3 18.2 7387 B.4 7490 20 2.44 0.01 2.44 0.055 426 490 0.007 133 0.73 0.04 127 0.09fi 00002 0.009 51.2 0.02
LGSC 8/7x7%7 4.07 8.3 12.4 7d22 8.3 1570 1160 22 7.79 0.01 1.79 0.06 0.053 420 510 0.002 175 0.43 0.04 11fi 0.132 00002 0.0% 59.9 0.03
CF 17.14 2004
LGSCOO.xIs 3?/200510:03 AM