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COLOWYO MINE Listing of Stream Lah Data Colowyo Coal Company, L.P. Water quality Data 1983-2004 Lower Taylor Creek (LTC) Flow Field Field Field Lah Lah TDS NO3+NO2 NH3 Bicarb Ambig. Ambig.SM Ambig. SN Ambig. SN Ambig. SM Ambig.SW Ambig.SN Ambig. SN Ambig.SN Ambig. SN Ambig.SN No datum =~ Blank Rate pH Temp Conduct pH Conduct •180 T55 as N as N as CaCO3 Sulfate P As Ca Fe Pb Mg Mn Hg Se Ne Zn cfs S.U. deg C umhdcm S.U. umhdcm mgA mg/I mgA mg/I mg/I mg/l mg8 mgA mgA mg8 mg/I mgA mg/I mgA mg/1 mgfl mgfl Statistics Mean 0.52 8.32 10.48 1613.23 8.09 1592.35 1127.76 468.15 1.45 0.08 302.67 512.25 3.80 0.00 90.86 4.94 O.Oq 11fi.88 0.38 0.00 0.01 92.79 0.06 Std. Dev. 0.95 0.33 6.50 452.45 0.27 438.92 355.7fi 2035.66 1.45 0.07 83.38 211.36 24.93 0.00 25.92 18.67 0.05 45.65 1.24 0.00 0.00 3fi.07 0.14 Ccef. Var. Range 6.3 7.9 25.1 3357.2 1.6 3370 1786 20582 4.94 0.36 400 1109 184.995 0.027 108.2 131.99 0.28 230 7.845 0.0009 0.015 1fi8 0.795 Max 6.3 9.3 25 3580 8.6 3570 1930 20584 4.95 0.38 467 1128 185 0.028 134 132 0.3 238 7.85 0.001 0.016 174 0.8 Min 0 7.4 -0.1 222.8 7 200 144 2 0.01 0.02 67 19 0.005 0.001 25.8 0.01 0.02 8 0.005 0.0001 0.001 6 0.005 Max at 429/1986 8/12/1983 6/18/1987 3/6/1998 2/25/ 1991 3/fi/1998 10/5/1989 3/1/1968 6/28/1985 2/52001 11/18/1997 10/5/1989 3/31/1986 3/1/1998 224/1986 228/1990 228/1990 10/12/1988 3/1/1988 2/52001 8/13/1984 1 0/5/1989 228/1990 Min at 12/132002 628/1985 11111/1999 5/19/1997 222/1989 228/1990 228/1990 3/30/1989 2/72000 10/5/1989 3/52001 2/28/1990 9/11/1997 1!6/1998 2/52001 9/13/1995 4/17/2000 228/1990 7!1/1996 6/1/1993 10/3/1996 228/1990 628/1985 # Of Samples 145 92 98 90 132 132 59 132 47 48 55 55 55 55 57 59 56 53 54 55 55 55 55 Station Sample Flaw Field Field Field Lab Lab TDS NO3+NO2 NH3 Bicarb Ambig. Ambig. SVlAmbig. SM Ambig. SN Ambig. SV~Ambig.SW Ambig. SN Ambig. SM Ambig. SM Ambig. SN Ambig.SN Name Date Rate pH Temp Conduct pH Conduct •180 TSS as N as N as CaCO3 Sulfate P As Ca Fe Pb Mg Mn Hg Se Na 2n cfs S.U. deg C umhdcm S.U. umhdcm mgfl mgfl mg/I mg/I mgA mg/l mg/I mg4 mg/I m94 mg/I mgR mg/I mg/1 mg/l mg4 mg/l LTC 1129/1995 0,003 8.3 1 2330 8.3 2330 20 LTC 12/5/1995 0.003 8.2 1 2340 8.1 1980 1470 28 0.02 0.09 344 650 0.201 0.001 109 0.95 0.02 155 0.03 0.0002 0.003 122 0.03 LTC 1/3/199fi 0 LTC 220/199fi 0.22 8.fi7 3 100fi 8.2 839 570 1040 0.5 0.08 188 220 0.901 0.007 57.3 23.3 0.02 52.1 0.721 0.0002 0.003 68 0.15 LTC 3/18/1996 0 LTC 4/1/1996 0.1 8.94 10 1940 8.3 1950 1390 42 LTC S/fi/1996 0.2 8.46 13 1835 8.4 1865 1330 30 0.02 0.08 367 560 0.034 0.001 101 0.37 0.02 139 0.013 0.0002 0.005 119 0.03 LTC 6/3/1996 0.3 8.12 12 1510 8.4 1527 5 LTC 7/1/1996 0.03 8.23 13 1484 8.4 1736 1220 8 0.02 0.05 376 530 0.005 0.001 85 0.1 0.02 131 0.005 0.0002 0.002 109 0.02 LTC 8/8/1996 0.04 8.55 16 1835 8.5 1820 5 0.05 LTC 925/1996 0.01 9 ii 1563 8.2 7904 8 0.14 342 620 0.005 0.001 99 0.11 0.1 134 0.03 0.0002 0.002 117 0.05 LTC 1013/1996 0.06 7.64 10.8 2620 8.3 2012 5 0.03 340 590 0.005 0.007 tOfi 0.07 0.04 137 0.01 0.0002 0.001 128 0.03 LTC 1121/1996 0.07 8.6 4.8 1420 8.5 1898 f0 0.24 292 590 0.007 0.001 118 0.09 0.02 136 0.0002 0.003 143 0.03 LTC 12/18H996 0 LTC 1/19/1997 LTC 225/1997 LTC 3/19/1997 LTC 421/1997 0.11 8.7 7.2 1607 8.4 1790 5 0.07 374 640 0.023 0.001 102 0.17 0.04 154 0.014 0.0002 0.004 152 0.02 LTC 5/19/1997 2.17 8.5 19.9 871 8.5 1050 254 0.74 284 250 0.005 0.002 80 4.11 0.04 71.7 0.111 0.0002 0.004 44.8 0.03 LTC 626/1997 0.69 8.3 19.3 1330 8.2 1370 16 0.5 355 420 0.005 0.001 83.1 0.41 0.04 112 0.017 0.0002 0.004 79.1 0.02 LTC 7/9/1997 0.31 8.6 18.8 1353 8.5 1360 8 0.05 320 450 0.005 0.001 84 0.4 0.04 117 0.03 0.0002 0.004 94.5 0.05 LTC 8/12/1997 0.16 8.39 15.8 1392 8.4 1810 1180 i6 0.42 0.05 328 420 0.005 0.001 93.9 0.26 0.04 121 0.009 0.0002 0.004 99.2 0.03 LTC 9/11/1997 0.04 8.4 15.7 1370 8.4 1740 1210 5 0.17 0.05 332 550 0.005 0.001 60.6 0.17 0.04 134 0.006 0.0002 0.003 117 0.02 LTC 10/30/1997 0.23 7.7 2.2 1925 8.3 1930 6 LTC 11118/1997 0.03 8.5 4 1430 8.1 1890 1340 6 1.67 0.05 467 Sfi0 0.01 0.001 119 0.04 0.04 142 0.016 0.0002 0.004 124 0.04 LTC 12/8/1997 0.2 8.5 3 1320 8.3 1910 5 L7C 1/6/1998 2.4 8.3 0.2 1990 8.2 1930 1410 70 1.59 0.06 451 590 0.006 0.001 113 1.53 0.04 139 0.092 0.0002 0.004 118 0.02 LTC 2/19/1998 0.01 8.3 2140 8.2 2110 46 LTC 3/6/1998 0.01 7.8 3580 7.5 3570 14 LTC 4/9/1998 3 8.1 1790 8.2 1760 67 LTC 427/1998 3 8.5 2090 8.4 1370 900 168 1.92 0.05 369 333 0.05 0.005 176 4.77 0.02 89.6 0.1 0.001 0.007 81.9 0.01 LTC 6/11/1998 0.7 8.5 9.9 1424 8.3 1320 22 CF 17.14 2004 LTC04.xls 322005 9:42 AM