REP42789

• Permit No: C1981019
• IBM Index Class Name: Report
• Doc Date: 3/29/2002
• Doc Name: 2001 AHR & ARR Exhibits 4,5,9,10
• From: Colowyo Coal Company
• To: DMG
• Annual Report Year: 2001
• Permit Index Doc Type: Hydrology Report
• Media Type: D
• Archive: No

COLOWYO MINE
Station: NGSW
Sample Aange: Through 12/31/01
Sample Depth
Date to SWL Elev SWL
ft ft MSL
________ _
09/05/89 _______
8.30 ______
6534. __
35
10/05/89 8.66 6533. 99
12/28/89 8.60 6534. 05
03/2]/90 6.30 6536. 35
05/30/90 8.30 fi534 . 35
0]/19/90 0,40 6534. 25
11/19/90 9.50 6533. 15
03/28/91 6,00 6536. 65
05/17/91 7.50 fi535. 15
08/19/91 8.00 6534. 65
10/1]/91 6.80 6535. 85
02/12/92 7.90 6534. 75
05/14/92 5.90 6536. 75
08/19/92 6.10 6536. 55
11/24/92 6.10 6536. 55
03/13/93 2.70 6539. 95
06/01/93 7.95 6534. ]0
08/23/93 8.30 6534. 35
11/30/93 7.10 6535. 55
03/21/94 5.50 6537. 15
06/01/94 7.40 6535. 25
08/23/94 8.50 6534. 15
11/18/94 8.50 6534. 15
03/15/95 7.40 6535. 25
05/23/95 6.20 6536. 45
09/13/95 8.30 6534. 35
12/05/95 7.90 6534. ]5
02/20/96 6,00 6536. 65
04/15/96 12.00 6530. 65
07/01/96 8.00 6534. 65
09/26/96 5.85 6536. 80
11/19/96 7.70 6534. 95
02/25/97 7.26 6535. 39
05/20/9] 5.81 6536. 84
08/14/97 7.45 6535 .20
11/18/97 8.00 6534. 65
02/19/98 7.30 fi535 .35
04/27/98 4.80 6537. 85
07/06/98 7.00 6535 .65
30/08/98 7.50 6535 .15
01/19/99 7.40 6535 .25
05/17/99 12.00 6530 .65
07/06/99 8.15 6534 .50
10/13/99 5.65 6537 .00
OS/15/00 6.50 6536 .15
a]/31/00 10.00 6532 .65
10/03/00 10.00 6532 .65
02/05/01 N N
OS/07 /O1 N N
Page 1
Note: N -> No measurement, D :> Dry