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<br />' movement between the two longwall panels north and south of this location may have caused <br />a kink in these holes. <br />Monitor hole 2-17U, located immediately over the East Mains, was mined under during <br />' November of 1985. The average water level dropped about 1.9 feet from the previous year. <br />Longwall Panel 1 (LW-1) was mined to within about 900 feet of this location in February 1988. <br />' Water level at monitor hole 4-20U dropped an average of 1.6 feet from the previous year's <br />reading. <br />Monitor hole 36-2U was mined past in a gateroad during August 1993. There are numerous <br />' drill holes at this location and one hole was encountered during mining. The hole <br />encountered underground was seeping at the measured rate of 0.25 gallons per minute. It is <br />not known if the hole mined through is one of the monitor holes (36-2U and 36-2L) or one of <br />the exploration holes drilled on this location. During this water year 36-2U showed a decrease <br />of about 3.1 feet compared to the average water level of the previous monitoring period. <br />t The 35-4 site is located within longwall panel 7 and was mined through in October 1994. <br />Monitor hole 35~U now shows a dry plug at 232 feet, probably a kinked or sheared casing. It <br />appears unlikely that 35~4U will provide useable data in the future <br />' Wells 29-4, 30-8, 31-7, 32-7 and 33-8 are located within Federal leases C-8424 and C-8425. <br />Only B-Seam will be mined within these leases. No mining has taken place near these wells. <br />Any fluctuation in the water level is probably only seasonal. <br />The data collected during this water year continues to demonstrate that there is very limited <br />vertical perrneability between the upper and middle monitoring zones. <br />' The "siltstone-coal facies" monitoring holes are designated by an "M" following the hole <br />number. These monitor holes are open through the interval containing the D Seam and B <br />Seam. <br />' Monitor hole TW2-17M was by-passed by mining first in November 1985 but was not <br />' intercepted in the workings. It is apparently located in a pillar completely surrounded by open <br />workings. At that time it showed virtually no response to room-and-pillar mining. In February <br />1988 longwall panel 1 was mined to within about 900 feet of this hole. Obviously, longwall <br />' mining disrupts the mined zone more than room-and-pillar mining, and the water level in <br />TWZ-17M did show a response to mining at that time. The average water level showed a <br />' decline of approximately 5.4 feet during the 1997-1998 period. <br />7 <br />