REP03538

• Permit No: C1981019
• IBM Index Class Name: REPORT
• Doc Date: 4/6/2007
• Doc Name: 2006 AHR & ARR Section 7 Exhibit 7A to Section 9 Exhibit 9A
• From: Colowyo Coal Company L.P.
• To: DRMS
• Annual Report Year: 2006
• Permit Index Doc Type: Hydrology Report
• Media Type: D
• Archive: No

WEST PIT FILL - 7150 WEST MONUMENT
DATE ELEV. NORTHING FASTING
~ • 0.000 7168.860 347885.006 1350499.310
f ~-15-96 -0.400 0.057 -0.081
JUN-6-96 -0.240 0.157 -0.135
AUG-13-96 -0.300 0.129 -0.048
OCT-10-96 -0.300 0.136 -0.088
MAR-11-97 -0.550 0.452 0.028
JUN-14-97 -0.950 0.547 0.021
JUL-26-97 -1.060 0.664 0.006
OCT-20-97 -1.160 0.783 -0.137
MAR-24-98 -1.350 0.925 -0.234
JUN-25-98 -1.600 0.980 -0.258
AUG-30-98 -1.670 1.034 -0.280
OCT-8-98 -1.720 1.064 -0.290
MAR-23-99 -1.940 1.297 -0.455
JUN-2-99 -1.960 1.442 -0.605
AUG-27-99 -2.030 1.563 -0.704
OCT-9-99 -2.080 1.570 -0.670
MAR-28-00 -2.220 1.638 -0.603
JUN-7-00 -2.220 1.734 -0.740
SEPT-8-00 -2.300 1.678 -0.788
•T-16-00 -2.300 1.684 -0.779
R-28-01 -2.380 -1.842 -0.788
,,.,.J-14-01 -2.400 1.851 -0.772
SEPT-10-01 -2.450 1.876 -0.767
OCT-07-01 -2.430 1.890 -0.797
MAR-23-02 -2.530 1-.901 -0.761
JUN-19-02 -2.580 1.945 -0.810
SEPT-5-02 -2.570 1.945 -0.773
OCT-5-02 -2.580 1.970 -0.829
MAR-28-03 -2.650 1.984 -0.820
MAY-17-03 -2.690 2.016 -0.833
AUG-27-03 -2.690 2.034 -0.840
OCT-21-03 -2.720 2.029 -0.839
MAR-19-04 -2.750 2.059 -0.869
JUN-2-04 -2.740 2.068 -0.832
SEPT-3-04 -2.710 2.100 -0.875
OCT-8-04 -2.710 2.084 -0.864
MAR-11-05 -2.770 2.130 -0.917
MAY-28-05 -2.850 2.144 -0.930
SEPT-6-05 -2.920 2.154 -0.890
QCT-22-05 -2.820 2.174 -0.900
R-7-06 -2.960 2.204 -0.900
J-6-06 -2.940 2.244 -0.940
StPT-15-06 -3.000 2.234 -0.900
NOV-02-06 -2.960 2.254 -0.920