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ENFORCE29106
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ENFORCE29106
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Last modified
8/24/2016 7:36:12 PM
Creation date
11/21/2007 12:09:26 PM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1980007
IBM Index Class Name
Enforcement
Doc Date
7/29/1998
Doc Name
WEST ELK MINE PN C-80-007 NOV CV-97-022
From
MOUNTAIN COAL CO LLC
To
DMG
Violation No.
CV1997022
Media Type
D
Archive
No
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<br />' Bear Mine Inflows Prior to November 1996 - <br />During the June 30th meeting, MCC reviewed both the West Elk Mine and Bear Mine maps <br />t including the general locations and rates of inflows, the locations of sumps, pumps, and pipelines <br />in the West Elk Mine, the chronology of mining, as well as mining conditions encountered in both <br />mines (as recorded by MCC's Geologist). Also, Wright Water Engineers calculated potential <br />' flow magnitudes based on hydraulic conductivities, utilizing the best available data, and compazed <br />them to the dates that Bear observed the wet rib and measured inflows at their Third West seals <br />' and Second West bleeder seals (Note that Bear's reported inflows were from sealed areas). The <br />water flow paths and accumulation areas in both mines were also determined. As opposed to the <br />statement in Division's letter that information "...correlate precisely, both in time and space...", no <br />' correlation was found in West Elk Mine's mining and water management activities and the <br />observations and claims made by Bear. MCC experienced water inflows and poor roof conditions <br />when mining under and just south of Lone Pine Gulch, and Bear had similar mining conditions and <br />' likely experienced inflows from Lone Pine Gulch (being on the north, down-dip side of the <br />drainage). Graphs of the inflow data obtained by Bear (see Exhibits 2 & 3 attached to the June <br />30th meeting summary) reflect a seasonal pattern in 1996 as would be expected of a colluvial <br />' inflow. <br />4) (No # 4) <br />1 5) The hypothetical 30 AF volume was taken from the water rights discussions and represents <br />20% of the total volume pumped into the sealed sump from November 1996 through January <br />1997. It also represents the total combined volumes of both ponds MB-1 and MB-2R. In the <br />water rights discussions, this volume was intended to represent a "worst case" diversion into the <br />mine for mining uses that may not have been returned to the river. Nonetheless, the river's water <br />' rights were kept more than whole by the fault inflows added to the river. MCC had no reason to <br />and did not pump water directly from the river to the sealed sump. <br />' 6) As discussed during the June 30th meeting, operational and inflow waters were pumped from <br />the Jumbo panels and main entries to the south and then east in the B East Mains to 29 crosscut, <br />even during longwall mining of the 4NW and SNW panels. This water then flowed along the dip <br />to the operational sump in the northeast comer of the 1NW panel and then was pumped out of the <br />mine as usual. As such, no water began accumulating in the NW panels operational sump until <br />' the ventilation seals around the 1NW - SNW panels were completed in May 1995. <br />7) See responses #1 & #5, above. MCC had the capability to pump from the sealed sump after <br />' the pump installation within the mine and the connection to the pipeline in Lone Pine Gulch was <br />completed in December 1997. In February 1998, the NW Sump #1 horizontal hole was also <br />completed, adding another point to discharge and sample water from the sealed sump. <br />8) See the above discussion and responses #5 and #6, above. <br />' NW Panels Sump Water Balance - <br />The best available data from MCC's slug tests were utilized to calculate the range of seepage <br />' rates (0.7 gpm to 8.4 gpm), as presented in MCC's TR 80 application. The actual sump outflow <br />
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