REP48358

• Permit No: C1981019
• IBM Index Class Name: Report
• Doc Date: 12/11/2001
• Doc Name: 1997 ARR AHREXHIBIT 4 YO COAL CO YO MINE
• Permit Index Doc Type: ANNUAL RECLAMATION REPORT
• Media Type: D
• Archive: No

Colowyo Coal Company
COL04Y0 MINE
Sample Field Field Field Lab Lab TDS Phosph. Bicarb NH3 N03tN02 N03 N02
Date pH Temp Conduct pH Conduc[ (180) as P as CaC03 504 as N as N as N as N As Ca Fe Pb Mg Mn Hg Se Na Zn
S.U. deg C umho/cm S.U. umho/cm mg/l mg/l mg/l mg/l mg/l mg/l mg/L m9/L mg/l mg/L mg/L mg/l mg/l mg/l mg/l mg/l mg/L mg/l
03/31/88 N N N 7.50 1500 1172 0.080 460.00 426.00 0.13 0.75 0.75 0.01 0.001 98.00 0.600 0.020 123.000 0.020 0.00020 0.002 173.00 0.360
06/27/88 7.00 17.0 1680 8.00 1720 1242 0.160 398.00 407.00 0.02 0.73 0.72 0.01 0.001 78.00 0.270 0.020 112.000 0.010 0.00010 0.003 179.00 0.040
08/15/88 7.00 20.0 N 7.90 1760 1236 0.580 460.00 426.00 0.07 0.81 0.76 0.05 0.001 98.00 0.260 0.020 128.000 0.010 0.00010 0.003 179.00 0.170
10/12/88 7.10 10.0 1650 7.70 1680 1214 0.180 446.00 438.00 0.03 0.92 0.78 0.14 0.001 92.00 0.950 0.020 132.000 0.030 0.00010 0.003 155.00 0.050
03/30/89 N N N 7.80 1680 1136 0.253 435.00 383.00 0.25 1.18 N 0.07 0.002 83.00 1.560 0.020 107.000 0.070 0.00010 0.002 148.00 0.220
08/01/89 7.58 N 1899 7.50 1870 1260 0.934 438.00 451.00 0.14 0.74 0.64 0.10 0.007 94.00 17.300 0.030 129.000 0.230 0.00010 0.002 171.00 0.390
10/04/89 7.58 N 1781 8.00 1710 1150 0.301 480.00 395.00 0.09 0.15 0.16 0.01 0.005 101.00 0.100 0.250 75.000 0.050 0.00010 0.002 176.00 0.050
12/28/89 N N N 8.00 1640 1174 0.166 462.00 410.00 0.35 0.18 0.16 0.02 0.003 96.00 5.700 0.020 126.000 0.080 0.00010 0.001 187.00 0.180
03/27/90 N N N 8.00 1370 1192 0.367 456.00 407.00 0.05 0.02 0.02 0.01 0.005 107.00 2.600 0.100 131.000 0.050 0.00010 0.001 200.00 0.150
05/30/90 7.19 15.0 1756 8.10 1820 1210 0.424 444.00 410.00 0.20 0.15 0.16 0.01 0.004 84.00 7.700 0.080 104.000 0.140 0.00010 0.002 149.00 0.190
07/19/90 7.96 12.0 1781 8.00 1760 1256 0.310 493.00 412.00 0.06 0.85 0.85 0.01 0.004 95.00 5.700 0.040 103.000 0.100 0.00010 0.003 141.00 0.250
11/19/90 N 15.0 N 8.20 1890 1198 0.727 462.00 418.00 0.16 0.88 0.87 0.01 0.007 127.00 29.000 0.120 112.000 0.390 0.00010 0.001 138.00 0.210
03/28/91 N 10.0 N 8.00 2010 1336 0.020 526.00 412.00 0.25 1.81 1.82 0.01 0.001 84.00 0.690 0.030 101.000 0.010 0.00010 0.003 144.00 0.010
05/17/91 N 14.0 N 7.90 1820 1434 0.050 492.00 646.00 0.05 0.05 0.06 0.01 0.001 122.00 7.300 0.020 134.000 0.620 0.00010 0.001 102.00 0.010
08/19/91 N 12.0 N 8.60 1440 1268 0.035 392.00 379.00 0.05 0.89 0.89 0.02 0.001 86.00 0.240 0.020 101.000 0.010 0.00010 0.002 145.00 0.020
10/17/91 N 13.0 N 8.00 2220 1128 0.060 462.00 414.00 0.05 0.81 N N 0.001 90.00 2.670 0.030 107.000 0.040 0.00010 0.003 150.00 0.030
02/12/92 N 6.0 N 7.90 1840 1056 0.034 450.00 370.00 0.08 1.02 1.02 0.01 0.001 90.00 0.020 0.020 111.000 0.010 0.00090 0.002 155.00 0.010
05/14/92 N 10.0 N 8.30 1510 1124 0.026 436.00 416.00 0.05 1.04 1.04 0.01 0.001 88.00 0.020 0.020 109.000 0.010 0.00010 0.004 148.00 0.010
08/19/92 N 12.0 N 7.90 1620 1126 0.026 445.00 610.00 0.06 1.04 1.04 0.01 0.001 77.00 0.020 0.020 90.000 0.010 0.00010 0.002 117.00 0.040
11/24/92 N 4.0 N 8.10 1660 1138 0.039 438.00 395.00 0.20 1.12 1.12 0.01 0.001 87.00 0.020 0.020 108.000 0.010 0.00010 0.003 147.00 0.010
03/13/93 N 10.0 N 7.70 1650 962 0.020 576.00 430.00 0.14 1.22 1.22 0.01 0.002 89.00 0.020 0.020 111.000 0.010 0.00010 0.004 147.00 0.050
06/01/93 8.30 11.0 1753 8.30 1700 1192 0.030 416.00 442.00 0.13 1.16 1.16 0.01 0.001 86.00 0.020 0.020 108.000 0.010 0.01000 0.005 137.00 0.060
08/23/93 7.70 9.0 1950 7.80 1970 1178 0.005 452.00 473.00 0.08 1.23 1.24 0.01 0.002 93.00 0.020 0.020 115.000 0.010 0.00020 0.005 147.00 0.010
11/30/93 8.30 5.0 1940 8.50 1970 1184 0.005 380.00 469.00 0.05 1.36 1.37 0.01 0.001 12.00 0.040 0.020 15.000 0.010 0.00020 0.005 19.00 0.010
03/21/94 7.50 8.0 1900 7.80 1920 1288 0.022 488.00 469.00 0.08 1.22 1.22 0.01 0.001 99.00 0.020 0.020 122.000 0.010 0.00020 0.005 153.00 0.010
06/01/94 7.60 9.0 1960 7.70 1941 1270 0.017 460.00 500.00 0.05 1.12 1.12 0.01 0.002 104.00 0.080 0.020 131.000 0.010 0.00020 0.006 163.00 0.010
08/23/94 7.70 8.0 1930 7.60 1890 1298 0.020 450.00 490.00 0.08 1.16 1.16 0.01 0.002 107.00 0.040 0.020 133.000 0.010 0.00020 0.007 164.00 0.010
11/18/94 7.90 5.0 1890 7.70 1870 1300 0.024 440.00 490.00 0.06 1.10 1.10 0.01 0.001 91.00 0.010 0.020 110.000 0.005 0.00020 0.006 150.00 0.010
03/15/95 7.50 8.0 1900 7.70 1940 1300 0.027 454.00 500.00 0.09 1.12 1.12 0.01 0.001 101.00 0.010 0.020 127.000 0.005 0.00020 0.005 154.00 0.010
05/23/95 7.40 8.0 2030 7.30 2060 1630 0.056 467.00 780.00 0.25 0.10 0.06 0.03 0.001 170.00 0.690 0.020 172.000 1.040 0.00020 0.001 86.60 0.020
09/13/95 7.50 10.0 1860 7.80 1840 1220 0.019 461.00 479.00 0.01 1.07 1.07 0.01 0.001 104.00 0.010 0.020 129.000 0.005 0.00020 0.007 161.00 0.030
02/10/98
Note: N => No measurement, D => Dry