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REV100477
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REV100477
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Entry Properties
Last modified
8/25/2016 1:10:57 AM
Creation date
11/22/2007 12:36:12 AM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1980007
IBM Index Class Name
Revision
Doc Date
6/22/1998
Doc Name
TECHNICAL REVISION NO 85 HYDROLOGY MONITORING PROGRAM REDUCTION WEST ELK MINE PERMIT NO C-80-007
From
MOUNTAIN COAL CO
To
DMG
Type & Sequence
TR85
Media Type
D
Archive
No
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iii i~uii~iiiu iii <br />Mountain Coal Company, LLC <br />West Elk Mine <br />Post Office Box 591 <br />Somerset, Colorado 87434 <br />Telephone 970.929-5015 <br />June 15, 1998 <br />Mr. Jim Burnell <br />Colorado Division ofMinerals and Geology <br />1313 Sherman Street, Room 215 <br />Denver- CO 80203 <br />r, <br />JUN ~ ~ X998 <br />Division olM;~i81s & G <br />RE: Technical Revision No. 85 (Hydrology Monitoring Program Reduction); <br />West Elk Mine; Permit No. C-80-007 <br />Dear Jim. <br />Mountain Coal Company (MCC) submits the enclosed technical revision application <br />to eliminate seven groundwater wells from the Hydrology Monitoring Program for <br />the West Elk Mine. In general, the wells that MCC proposes to eliminate are <br />damaged and are not providing reliable data. A justification for removal of each of <br />the wells is provided below. In addition, enclosed are revised permit pages and <br />revised Map 34. <br />GP-5 -This well is located on the northeast side of the Lower Refuse Pile (LRP) <br />and was completed to monitor the colluvium beneath the pile. There has never been <br />any water in this well since it was installed in 1985, indicating that the LRP is not <br />impacting the colluvium under the pile. There is now evidently a problem with this <br />well. A plot of the level measurements for this well give the appearance that the <br />water level in the well is rising, but is still reported as "dry". MCC believes that <br />these readings indicate that the casing is damaged. Two other wells, GP-3 and GP-4, <br />are located in the same vicinity and monitor the same zone. <br />SOM 23-H-1 -This B-seam monitoring well was drilled and monitored in 1978, but <br />has apparently been damaged due to a landslide in the area. Monitoring of the well <br />was reinitiated during water year 1996. There was a large increase in water level <br />from the original readings taken in 1978 to the readings taken since 1996. The <br />casing is probably damaged, allowing surface water to enter the casing, which does <br />not provide useful data on the B-seam. <br />SOM 23-H-2 -The well was completed and monitored during the same time frame <br />and is located in the same area as SOM 23-H-1, and may have been affected by the <br />landslide as well. This well is not providing reliable data on the E-seam. <br />LP-I -This well was completed in the Rollins Sandstone in 1994, and is located in <br />the Lone Pine Gulch area. The last reliable reading for this well was recorded <br />
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