REP46477

• Permit No: C1984065
• IBM Index Class Name: Report
• Doc Date: 3/12/1987
• Doc Name: REVIEW OF HYDROLOGIC MONITORING FOR THE MID TERM AND 1986 ANNUAL HYDROLOGIC REPORT C-84-065
• From: MLRD
• To: NEW CASTLE ENERGY CORP
• Permit Index Doc Type: HYDROLOGY REPORT
• Media Type: D
• Archive: No

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STATE OF COLORADO
Roy Romer, Gove
DEPARTMENT OF NATURAL RESOURCES
MINED LAND RECLAMATION DIVISION
DAVID C. SHELTON, Director
March 12, 1987
Mr. Tim O'Connor ,
New Castle Energy Corporation
9137 East Mineral Circle
Englewood, Colorado 80112
Re: Review of Hydrologic Monitoring for the Mid-term and 1986 Annual
Hydrologic Report - C-84-065
Dear Mr. O'Connor:
I have reviewed your 1986 Annual Hydrologic Report (AHR) and appreciate the
concise format and graphical depictions presented. I am enclosing some Stiff
and Piper Trilinear diagrams of the bedrock units. For your information, this
program HC-GRAM is available from Gary McIntosh of the OSM at the Western
Technical Center free of charge.
The only specific problem noted in the AHR was that Well 3-SD-3H is depicted
as representing the Rollins SS. The permit application shows this well to be
completed in the Wheeler Coal.
After reviewing the data through time, it appears that your assumption that
the packers have failed in Well SK-3H is valid, The Stiff and Piper Trilinear
diagrams were plotted to trace the problem through time. A commingling of all
the waters in the well appears to be occurring.
Another problem came to light with these plots. If 3-SK-3H is in the Wheeler
Coal, it has no resemblance to the water of SK3.75 that is completed singly in
the Wheeler. It could be that the packers were never properly set and zones 2
and 3 of SK-3H have always been in communication.
Yet another problem cropped up when reviewing the quality of SK3.75. The
water is showing increased levels of carbonate and pH through time. Due to
past experience, this level of carbonate leads me to suspect concrete
completion problems and consequent contamination. Other wells from other
areas of the state that have had concrete contamination problems have been
associated with natural high pH water of greater than 8.0. I suspect that in
previous cases the problem is with the type of concrete used for completion,
in that, the concrete will not properly set up in this water.
Appendix 3.3-4 shows Well SK-8A to be completed in the Nheeler Coal, however,
no chemical analyses are given. If any analyses for this well are available,
it could help to clarify the problems.
423 Centennial Building, 1313 Sherman Street Denver, Colorado 80203-2273 Tel. [phone]