REP52129

• Permit No: C1982056
• IBM Index Class Name: Report
• Doc Date: 7/29/1993
• Doc Name: 1992 ANNUAL HYDROLOGY REPORT REVIEW
• From: DMG
• To: TWENTYMILE COAL CO
• Annual Report Year: 1992
• Permit Index Doc Type: HYDROLOGY REPORT
• Media Type: D
• Archive: No

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STATE OF COLORADO
DIVISION OF MINERALS AND GEOLOGY
Department of Natural Resources
1313 Sherman St., Room 215
Denver, CO 80203
Phone: [phone]
FA%: [phone]
July 29, 1993
Mr. Marcus Middleton
Twentymile Coal Company
29587 Routt County Road No. 27
Oak Creek, CO 80467
Re: Foidel Creek Mine, Permit No. C-82-056
1992 Annual Hydrology Report Review
Dear Mr. Middleton:
The Division has completed review of the 1992 AHR for the Foidel Creek Mine. Please
respond to the questions as appropriate within 60 days of receipt of this letter.
Genera/ Comments and Errors/Omissions
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Roy Romer
Governor
Michael B. Long
Division Director
1. The copy of the map titled "Designated Locations Hydrologic Monitoring Program" is
badly faded to the point that contour lines, stream locations, and other features cannot
be seen. Please provide an accurate, legible map in the 1993 AHR submittal.
2. A number of items noted previously by the Division were to be corrected in the
1992 AHR as per a commitment by TCC in the 1991 AHR review response. Many of
these were not done and are as follows:
a) Elevation information is incorrect for site 27A.
b) Site 14 data is not included but is part of the plan.
c) FCT-81-1, FCT-87-1, 303-1, 303-2, and 303-3 are not shown on the
map.
d) Frequency notations in Table 1 are off by one column for 006-AY-1,
009-79-4.
e) Spring 20-14 is improperly symboled on the map.
f) Figure 53 plot shows exactly the same values for site 1002 and
006-AW-2, which is apparently incorrect.
g) The same problem as f) exists for Figure 20.
h) Site 115 sample sheets were not attached to your response.
3. From review of the 1992 AHR the additional errors are noted.
a) 63.4 feet to water in well 006-AW-2?
b) 008-AV-3 shows 10 field pH readings rather than 12. This generic
problem exists throughout the report.