REP09328

• Permit No: C1982056
• IBM Index Class Name: Report
• Doc Date: 7/31/1995
• Doc Name: 1994 AHR Review Letter
• From: DMG
• To: Twentymile Coal Company
• Annual Report Year: 1994
• Permit Index Doc Type: HYDROLOGY REPORT
• Media Type: D
• Archive: No

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999
- STATE OF COLORADO
DIVISION OF MINERALS AND GEOLOGY
Depanment of Natural Resources
1313 Sherman St., Room 215 I~I~~~~~I~
Denver, Colorado 80203 III
Phone: [phone]
FAX: [phone]
DEPARTMENT OF
NATURAL
July 31, 1995 RESOURCES
Roy Romer
Governor
lames 5. Lochhead
Mr. Karl Koehler Executive Director
Twentymile Coal Co. Michael B. Long
29587 ROUtt CO. Rd. ~ 27 Division Director
Oak Creek, CO. 80467
RE: 1994 Annual Hydrology Report Review, Foidel Creek Mine, ~C-82-
056
Dear Mr. Koehler:
The Division has completed review of the 1994 Annual Hydrology
Report (AHR) for the Foidel Creek mine. Please respond to each
item as appropriate.
1993 AHR Review. Outstanding Issues
1. Please review your file for the Division's letter of December
19, 1994 concerning the conversion of pressure readings to
depth for the 1993 data and respond as appropriate.
General Comments - 1994 AHR
1. Figures 84 and 85 show a labeling discrepancy on the X axis.
Please explain and correct as appropriate.
2. Please indicate the units of the values which represent the
mine water discharge meter readings.
3. Elevation information on Figure 2 is missing for springs 20-14
and 303-1. Please add this information as appropriate.
4. Figure 2, Designated Locations, Hydrologic.Monitoring Program
indicates many stations which are not part of the Foidel Creek
hydrologic monitoring program. Please eliminate all non-
Foidel Creek stations from Figure 2.
5. Figures 72 and 76 do not report data for the period of record
as the annotation on the figure indicate.
6. The map inaccurately identifies well 006-88-2 as 006-89-2.
Please correct.