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2011-02-09_REPORT - C1981018 (2)
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2011-02-09_REPORT - C1981018 (2)
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Last modified
8/24/2016 4:30:54 PM
Creation date
2/10/2011 8:58:56 AM
Metadata
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Template:
DRMS Permit Index
Permit No
C1981018
IBM Index Class Name
Report
Doc Date
2/9/2011
Doc Name
2010 Annual Hydrology Report
From
Blue Mountain Energy
To
DRMS
Annual Report Year
2010
Permit Index Doc Type
Hydrology Report
Email Name
JRS
SB1
Media Type
D
Archive
No
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The "upper sandstone facies" holes are designated by a name ending in "U". <br />There are three upper facies holes with water (22-3U, 29-4U and 33-8U). 22-3U is a <br />newer hole constructed in the fourth quarter of 2005 for baseline and monitoring purposes <br />of future mining activities. Water levels in this well appeared stable over the past year <br />with an indicated rise of only 0.4 feet. Data for this well and other wells are shown in <br />Appendix C. <br />29-4U had only a slight drop in water level from the prior year (1.5 feet). The prior year <br />saw a substantial drop of around 30 feet. This year's slight decrease indicates that the <br />water system is stabilizing. <br />The water level in 33-8U only declined slightly with a drop of 0.4 feet from the prior year, <br />well within the expected annual fluctuation. <br />The middle "siltstone-coal facies" monitoring holes are designated by an "M" following the <br />hole number. These monitor holes are open through the interval containing the D Seam <br />and B Seam. <br />Monitoring hole 22-3M was drilled in November 2006 and is now the 'point of compliance'. <br />Depth to water data is included in Appendix D and annual qualitative data presented in <br />Appendix C. This hole has exhibited artesian flow since 2007. <br />Monitor hole TW2-17M was surrounded by mining first in November 1985 but was not <br />intercepted in the workings. It is apparently located in a pillar completely surrounded by <br />open workings. At that time it showed virtually no response to development mining. In <br />February 1988 longwall panel 1 was mined to within about 900 feet of this hole. <br />Obviously, longwall mining disrupts the mined zone more than development mining, and <br />the water level in TW2-17M did show a response to mining at that time. The water level <br />has steadily decreased since 1988 with a decrease of 1.0 feet since the last monitoring <br />period. <br />Water levels in monitoring hole 294M decreased 13.5 feet from the prior year. Some <br />influence of longwall mining may be showing up as the lateral source for recharge has <br />been cut off. In addition, the longwall development section mined within 100' of this hole <br />during 2009. <br />The water level in Hole 30-8M remained relatively stable with a drop of 0.3 feet. This well <br />is located in a pillar next to the start line for LWB-8. This pillar was developed in <br />September 2006. A substantial decrease in water level was noted following the <br />development work. The change noted in 2010 is not considered significant. <br />6
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